On the first run I was thinking this thing needs more revs and when you when down a tooth it immediately sounded much much better rev wise. Before that it just sounded like an old school low revving 4 stroke, but that second run the difference in sound was night and day. Excellent effort and a lovely looking bike, well done
19.73 hp i.ebayimg.com/images/g/BfkAAOSwMoRfEy6X/s-l1600.jpg I always thought the sloper 175 was rated at 20hp. Later years with the vertical 175 was rated lower.
Fantastic work of engineering. Back in the 80's I ran a 4 speed single carb CD175, besides a 2 into 1 megaphone muffler and down from a 39T to a 34T rear sprocket I clocked a whopping 81mph downhill, chances it was touching [nearly] a real 70mph - I was delighted with myself
I had almost the same to start with my base was an old CD 175 but changed the bottom end to the CB 175 with the 5 speed box kept the single carb head worked it my self as much as i could put an so called off road cam in changed the carb for an 1 1/4 SU white spring and a home made 2 into 1 clocked at 102mph
I have watched several of your videos on the building of your bike. Congratulations on cracking the Ton! I have an ACU speed record in the UK with my 175cc Honda. My record is for the pushrod engine class. I achieved a two way average on the mile of 93.054mph with my modified 172cc push rod CG125 single normally aspirated.
That's going some on a CG, what sort of mods have you done to the engine to get that sort of speed out of it? I presume that you are using some sort of funny' fuel?
@@sidecarbod1441 No thats on regular forecourt fuel. It has larger valves from an ATC200R, Wiseco forged piston 66.5mm from an XR200, alloy liner nickasil plated, crankcase mouth opened out. Home made cam, OOracing cdi box and FCR32MX carb from the CRF150 crosser. I have found more power since it did those terminal speeds on the standing start mile. I am hopeful it too can crack the Ton next time i run it!
@@MrTench8 would the class that you run in allow you to run methanol or something like that, the carb would need extensive re-jetting but you could gain some BHP. Anyway I love what you have done to your 'commuter bike' engine, I bet you could get down to the shops pretty quick! I bet making a cam caused you a few headaches!
Interesting comment. My daughter bought a Chinese dual purpose bike using a knock-off of the CG engine fitted with 230cc displacement. It developed a head gasket leak and pulled the head to redo that and noticed that it had pretty large valves. With one cam lobe doing all the work, making a cam must not have been too daunting. Any rpm figures for your 172cc engine?
@@whalesong999 The cam was not too difficult to make. Getting the timing intervals for the valve overlap was the biggest problem, that required the cylinder to be lowered to bring the cam follower contact points further down the sides of the cam lobe. It is making 20bhp at the wheel at 12,000rpm, yes all the valve gear is extensively lightened!! Your 230 engine will have a longer stroke than mine, 230 is about the max these engines can go out to without changes to the crankcases.
@@malcolmwhite6588 Centrifugal superchargers have less heating (primary benefit) less parasitic load on the engine and are smaller and lighter. The downside is they have a power band similar to a turbo. A roots will give much more street-able bike, but I tend to think a centrifugal would be the better choice for a speed record bike. But there could be something I am missing here, so that's why I am asking.
Thats quite an acievement for that little engine, should get in contact with donut media; they tried and failed getting into 100mph, maybe they would be interested in this.
You're inspiring, I had to re-test to get motorcycle M-CLASS license 10yrs ago when I turned 50... and that was on a Yamaha 250cc twin... How nice it would have been to have your SUPERCHARGER on that rig !!! Thanks Lawrence 😅
It's been a priviledge to have been able to follow this project, with a result that would not shame a factory supported team. Your humble attention to detail, patience and methodical approach to problem solving should be an inspiration to anyone who doubts they can find reserves they never knew they had. What ever you decide to do next will just build on this. Well done and as always thank you.
The algo brought me here and I couldn't be more glad it did. I used to help a friend build 36hp VW Challenge LSR cars. I really appreciate what you were able to extract from this limited powerplant. And it stayed together!!!
Years Ago I built A Honda Frankenstein Bike From A pair of the upright Cylinder CB 175, and a CD 175, I put the 5 speed from the CB into the starterless cases of CD , put the twin carb heads on over bored barrels running I don't know what pistons ( My brother in laws had a Bike Breaking yard ) But I drilled and machined virtually everything in the engine for lightness, I even gave it a BSA Pineapple Finned style Barrel and heads, the con rods were drilled and lightened the heads ported and flowed , the clutch basket drilled the gears in the gearbox even hand made 2 into 1 super light exhaust, That bike hit an indicated 105 mph on the flat , unfortunately when I missed a gear one day the engine totally grenaded , and sounded like a cocktail shaker inside lol, But this kinda reminded Me of My quest for speed on that little bike Well done, I will say that on its 105 top speed run , I was running a hand made water / methanol injection kit that I could turn on and off 👍👍
That's awesome. That was my first bike back in the seventies. Never thought I'd see someone do that to it. I talked my dad into buying a motorbike so it was critical that we walked out of the shop with one that day before he changed his mind. As luck would have it that was all they had 2nd hand. We ended up with a CL175 as our/my first bike and took it to Hungry Creek in NSW, camped there for few days and had the best time in the dirt. Awesome job.
Had one of these my first bike , they sound like a four cylinder by half . Would have my dog on the tank . All these Hondas take a hell of a beating and get up for more. Congratulations on setting that record amazing work.
I had a 69 scrambler that my brother bought new. I really enjoyed it. I holed the right piston twice, which made me really appreciate the no down tube frame. Good job!
I had a 1967 CL-160 which topped out at 85, bock stock. I dove it 35,000 miles in fourteen months until I joined the Navy in 1972. With that bike, I drove from Western Illinois to Louisville and back every weekend. It ran 70 mph all day long. I cracked a piston twice because of using cheap gas. It was a real nice bike.
This is top class and very imaginative engineering. I take off my hat to you, well done indeed ! Are there rules around the use of a small fairing for drag and stability ? that would seem to be the obvious next move, at least to me. Again, a hat tip to ya ! I'm impressed.
Right on! my first bike was a CD175 and it was a great twin. 45 years ago. Larger rear wheel may add a bit, 18" vs 19" on a BSA does it. You should dust bin a body it may add 20mph :)
But then it would be a different class. Nekkid vs. faired. Should definitely do it tho'. Craig Vetter is gone now; IDK if shells of his super efficient hypermiler fairing are still available? If not, definitely watching his video series on the 400+mpg? motorcycle should enable you to roll your own...
A pal built a fairing using airplane frame like those flat cut animals you assemble then once mounted to bike he just skinned it like a boats added bent rods and removed the form. I think with cheap cnc 3d printing a body could be made in weekend. I made and repaired copies of Don Vasco Tz250 tails that way. Great work man,@@nunyabidniz2868
When I was a young teen my older brother got hold of a 125 s.o.h.c.honda twin motor similar to yours ,I think it was 1966-7 maybe a year later.He built a frame and made a dirt basher with it, it revved very high.I remember my brother getting me to siphon some fuel for it and I got a mouthful,methanol,blue,swollen lips,the thing was unreliable but made a great noise.
I am 75 and had bikes from 13 to 74 years old. Those 70s Hondas were a bit bland but they were beautifully designed and built. My first Honda was a 66(?) 305 Honda dream, ugly but so well made after my 1950 BSA b31 350 which leaked oil and vibrated etc. Great to see you getting the most out of the little motor. Congratulations.
Too cool, congratulations. Bulletproof engines, I put a fair amount of miles on 160s and currently have 305 Dream that I ride the snot out of. The only thing that bums me is that almost no one rides these great bikes anymore.
These "sloper" twins had so much potential. I rode CB-160s, had several of them and commuted on one for years. I set one up for AAMRR amature road racing but never raced it, sold it to a collector years ago. There wasn't much available in speed parts for the small twins though some parts were available in Japan and could be purchased from a Honda racing dept. but negotiating getting them wasn't convenient. Perhaps you could pass along what you did to the engine other than the supercharging. I had one of these 175 engines and noted that the bore to combustion chamber shape was matched - the CB-160 had the valves and combustion chamber of the CB-93 which was a 125cc so the match to the bore wasn't good for reworking for power. There were aftermarket cams and valve springs but the compression was still less than 8.5:1 IIRC.
In the late 1970s NZ had a honda175cc speed record and 11000rpm. My main ride commuter on country roads was a stock CL175 . Only burnt out a piston twice times for slightly out of tune. Wore the ig switch out so I had to tie the key in so it wouldnt fall out.
I was smiling watching this and two thoughts came into my mind: 1. I wonder what Burt Munro would have thought? 2. Wonder how fast it'll go with a streamlined body on it. My heartiest contratulations.
I used to have a Honda cd 175 looked very similar to your cl ware engine was sloped and made part of the frame. That bike was extremely fast as standard. Well done on your build and record.
I have to admit that I am not familiar with the regulations of this record. With that said, in this configuration, the biggest obstacle is now drag (aerodynamic drag). At 100mph there is a lot of it. I think that, with aerodynamic refinement (with a small weight penalty), the record could be significantly extended. You probably noticed that when running with the taller gear, the obstacle was more aerodynamic than lack of power. Good runs, a beautiful build, and a record in the bag. A job really well done!
WOW!!!! Congratulations! Man, I was sweating on both runs. Way to go! Glad you didn't blow it up, or you would have scraped up those nice leathers LOL!!! There is probably a lot you can do to this current bike to up that record. That is basically a stock motor....... Thinking titanium valves, heavier springs and maybe Carillo rods to lighten up the drivetrain. Plus forged pistons and balancing the whole lot will up your redline significantly. Easy 110mph
Thanks Roland for everything! Yes, the bike has a lot of power still on the table. That blower is capable of at least 25 psi of boost - I just need to make some upgrades before I attempt to push it further. Thanks for all the support throughout this build 👍
This was really cool too see. What a cool build. I can relate in a way building single cylinder honda engines with TB Parts big bore and performance parts, mixing and matching different transmission sets and gearing. Even a few MPH dont come easy once youve hit your plateau of RPM-Gear ratio- and fire to the tire. Lol great video and build!
Frikking amazing. Always loved these old small bikes. Fantastic work, looks like it could have come that way. Is there anything you would do differently, want to add?
I think I'm going to keep pushing the little 175. It still has a lot of power left on the table, I just need to make some upgrades to it to be able to handle it.
This is an ECTA record, standing mile. I never said this is a world record (which are all flying miles). However, I couldn't find the records you stated for the class my bike is in. Could you send me a link at vintageironracing@gmail.com?
Congratulations on the record. I don't know if you considered using a 2 stroke 175cc bike, but if you do, I really recommend the yamaha engine. I used to have a dt175 and in stock form they are way faster than it needed to be. I think that with very rudimentary tweaks like a lightweight frame and some tuning, you can easily get over 100 mph
And, if you want to run the single-cylinder buzz-bombs, the one to get is the *Rotary-Valve* Kawasaki. It’s the hottest stocker of the early seventies, making over twenty horsepower as it comes from the factory. Modest mods can almost *double* this figure, supposedly - tuned-length intake pipe with a 30 to 34 mm carb on the outer end(stock is 26mm), modest porting work, and a tuned exhaust…. Stock redline on these was eight thousand. Note: you’ll wish to check these for vacuum leaks *religiously.* I rode mine home at ~ 75 miles an hour, and seized the rings in the piston - idled really high going off the freeway, then quit entirely a quarter mile from home. Had to push it the rest of the way…. Head bolts lose torque, especially. Check them often after a rebuild, at least a few times. Best to just do a leak down test on a regular basis if you do any real mods to these engines, and run a castor-based oil in the oil tank, e.g. Blendzall ultra or equivalent. (If pushing it especially hard, run a lean premix *In addition to what’s in the oil tank.* Note that this is an old-school trick mentioned back in publications dating from the early seventies.)
Did you do any cylinder head porting? Change the conpression ratio? Stock pistons and does it have the solid oil ring? Never seen any one doing what you are doing. Its awesome!! Just wonder what you have done to the interanls......
A great effort on such a small engine, wonderful engineering to get the bike to run at such a high speed...one question, is it permissible to use a fairing/ streamliner...or would the extra weight negate the wind cheating effect
No S, I had a cobble together big bore Powell stroker xl/cl125 in an xl frame. Roughly 200cc with a 28mm rs cb750 carb. Later model 2 piece head, open Powell header. 18" rear, 35t 17t front. It would pull to 10k and the tach and speedo were matched in 5th. In other words, nothing major, stock looking bike , though loudish, would seemingly clip triples. Stock xl125 with front sprocket and exhaust would do over 75.
Fantastic looking bike and great engineering, sounds really nice too! Just wondering why the display didn't have an aerodynamic nose cone/fairing attached to it as it's every bit counts? Or doesn't it make much difference?
I don't think that you were really pushing the revs too hard. The limit is set for a standard engine not a carefully assembled and balanced competition one. It certainly sounded much happier and definitely ran better at those higher revs. Well done.
Congrats on the record. Im working on a 172cc engine and an amr 300. Would you be willing to share the ratios you ran and the boost you got. Looking to keep it under 7 psi.
It requires at least 35 hp to top 100mph on a naked bike, so you’re pulling 3+ hp per cubic inch from your vintage machine. Excellent tuning!
i think todays yamaha single cylinder liquid cooled 135cc bikes made in thailand hits 100mph
O right so the guy on a 50cc naked bike and him in speedos was what horsepower ?
On the first run I was thinking this thing needs more revs and when you when down a tooth it immediately sounded much much better rev wise. Before that it just sounded like an old school low revving 4 stroke, but that second run the difference in sound was night and day. Excellent effort and a lovely looking bike, well done
These 175's were great engines for the time, revving into 11k and 17hp stock. Your build looks wonderful.
19.73 hp i.ebayimg.com/images/g/BfkAAOSwMoRfEy6X/s-l1600.jpg
I always thought the sloper 175 was rated at 20hp. Later years with the vertical 175 was rated lower.
Fantastic work of engineering. Back in the 80's I ran a 4 speed single carb CD175, besides a 2 into 1 megaphone muffler and down from a 39T to a 34T rear sprocket I clocked a whopping 81mph downhill, chances it was touching [nearly] a real 70mph - I was delighted with myself
I had almost the same to start with my base was an old CD 175 but changed the bottom end to the CB 175 with the 5 speed box kept the single carb head worked it my self as much as i could put an so called off road cam in changed the carb for an 1 1/4 SU white spring and a home made 2 into 1 clocked at 102mph
Looks like a super-fast LSR beast just standing still. Awesome work!
I have watched several of your videos on the building of your bike. Congratulations on cracking the Ton!
I have an ACU speed record in the UK with my 175cc Honda. My record is for the pushrod engine class. I achieved a two way average on the mile of 93.054mph with my modified 172cc push rod CG125 single normally aspirated.
That's going some on a CG, what sort of mods have you done to the engine to get that sort of speed out of it? I presume that you are using some sort of funny' fuel?
@@sidecarbod1441 No thats on regular forecourt fuel. It has larger valves from an ATC200R, Wiseco forged piston 66.5mm from an XR200, alloy liner nickasil plated, crankcase mouth opened out. Home made cam, OOracing cdi box and FCR32MX carb from the CRF150 crosser. I have found more power since it did those terminal speeds on the standing start mile. I am hopeful it too can crack the Ton next time i run it!
@@MrTench8 would the class that you run in allow you to run methanol or something like that, the carb would need extensive re-jetting but you could gain some BHP. Anyway I love what you have done to your 'commuter bike' engine, I bet you could get down to the shops pretty quick! I bet making a cam caused you a few headaches!
Interesting comment. My daughter bought a Chinese dual purpose bike using a knock-off of the CG engine fitted with 230cc displacement. It developed a head gasket leak and pulled the head to redo that and noticed that it had pretty large valves. With one cam lobe doing all the work, making a cam must not have been too daunting. Any rpm figures for your 172cc engine?
@@whalesong999 The cam was not too difficult to make. Getting the timing intervals for the valve overlap was the biggest problem, that required the cylinder to be lowered to bring the cam follower contact points further down the sides of the cam lobe. It is making 20bhp at the wheel at 12,000rpm, yes all the valve gear is extensively lightened!!
Your 230 engine will have a longer stroke than mine, 230 is about the max these engines can go out to without changes to the crankcases.
So happy for you. It’s great to see a project you’ve worked so hard on exceeding its goals. I think there’s more in that engine if you go after it. 👍🏁
Absolutely, 11 psi of boost is just getting started. Thanks for watching!
@@vintageironmotorcycles Are you planning on sticking with the Roots? And if so, why?
@@vintageironmotorcycles Gorgeous Classic motorcycle - beautiful engineering incredibly executed, I think soichiro would be proud
@@rockets4kids Why not what is the problem with the roots and what would you suggest?
@@malcolmwhite6588 Centrifugal superchargers have less heating (primary benefit) less parasitic load on the engine and are smaller and lighter. The downside is they have a power band similar to a turbo. A roots will give much more street-able bike, but I tend to think a centrifugal would be the better choice for a speed record bike. But there could be something I am missing here, so that's why I am asking.
Thats quite an acievement for that little engine, should get in contact with donut media; they tried and failed getting into 100mph, maybe they would be interested in this.
Damned best my exact sentiment!
You're inspiring, I had to re-test to get motorcycle M-CLASS license 10yrs ago when I turned 50... and that was on a Yamaha 250cc twin... How nice it would have been to have your SUPERCHARGER on that rig !!! Thanks Lawrence 😅
It's been a priviledge to have been able to follow this project, with a result that would not shame a factory supported team. Your humble attention to detail, patience and methodical approach to problem solving should be an inspiration to anyone who doubts they can find reserves they never knew they had. What ever you decide to do next will just build on this. Well done and as always thank you.
The algo brought me here and I couldn't be more glad it did. I used to help a friend build 36hp VW Challenge LSR cars. I really appreciate what you were able to extract from this limited powerplant. And it stayed together!!!
Years Ago I built A Honda Frankenstein Bike From A pair of the upright Cylinder CB 175, and a CD 175, I put the 5 speed from the CB into the starterless cases of CD , put the twin carb heads on over bored barrels running I don't know what pistons ( My brother in laws had a Bike Breaking yard ) But I drilled and machined virtually everything in the engine for lightness, I even gave it a BSA Pineapple Finned style Barrel and heads, the con rods were drilled and lightened the heads ported and flowed , the clutch basket drilled the gears in the gearbox even hand made 2 into 1 super light exhaust, That bike hit an indicated 105 mph on the flat , unfortunately when I missed a gear one day the engine totally grenaded , and sounded like a cocktail shaker inside lol, But this kinda reminded Me of My quest for speed on that little bike Well done, I will say that on its 105 top speed run , I was running a hand made water / methanol injection kit that I could turn on and off 👍👍
That's awesome. That was my first bike back in the seventies. Never thought I'd see someone do that to it. I talked my dad into buying a motorbike so it was critical that we walked out of the shop with one that day before he changed his mind. As luck would have it that was all they had 2nd hand. We ended up with a CL175 as our/my first bike and took it to Hungry Creek in NSW, camped there for few days and had the best time in the dirt. Awesome job.
Had one of these my first bike , they sound like a four cylinder by half . Would have my dog on the tank . All these Hondas take a hell of a beating and get up for more.
Congratulations on setting that record amazing work.
I had a 69 scrambler that my brother bought new. I really enjoyed it. I holed the right piston twice, which made me really appreciate the no down tube frame. Good job!
I had a 1967 CL-160 which topped out at 85, bock stock. I dove it 35,000 miles in fourteen months until I joined the Navy in 1972. With that bike, I drove from Western Illinois to Louisville and back every weekend. It ran 70 mph all day long. I cracked a piston twice because of using cheap gas. It was a real nice bike.
This is top class and very imaginative engineering. I take off my hat to you, well done indeed !
Are there rules around the use of a small fairing for drag and stability ? that would seem to be the obvious next move, at least to me. Again, a hat tip to ya ! I'm impressed.
Right on! my first bike was a CD175 and it was a great twin. 45 years ago. Larger rear wheel may add a bit, 18" vs 19" on a BSA does it. You should dust bin a body it may add 20mph :)
But then it would be a different class. Nekkid vs. faired. Should definitely do it tho'. Craig Vetter is gone now; IDK if shells of his super efficient hypermiler fairing are still available? If not, definitely watching his video series on the 400+mpg? motorcycle should enable you to roll your own...
A pal built a fairing using airplane frame like those flat cut animals you assemble then once mounted to bike he just skinned it like a boats added bent rods and removed the form. I think with cheap cnc 3d printing a body could be made in weekend. I made and repaired copies of Don Vasco Tz250 tails that way. Great work man,@@nunyabidniz2868
My stock 1971 CL175 would go 82 mph, so 100 mph on a modded, blown one is a piece of cake. Congrats!
When I was a young teen my older brother got hold of a 125 s.o.h.c.honda twin motor similar to yours ,I think it was 1966-7 maybe a year later.He built a frame and made a dirt basher with it, it revved very high.I remember my brother getting me to siphon some fuel for it and I got a mouthful,methanol,blue,swollen lips,the thing was unreliable but made a great noise.
thats fantastic, dad ran cd175, s back in the seventies and eighties, wonderful little motors
If I remember right a 175 can am two stroke naturally aspirated ran at Bonneville on mushy salt ran 98+ for a world record.
2 strokes rock
I am 75 and had bikes from 13 to 74 years old. Those 70s Hondas were a bit bland but they were beautifully designed and built. My first Honda was a 66(?) 305 Honda dream, ugly but so well made after my 1950 BSA b31 350 which leaked oil and vibrated etc.
Great to see you getting the most out of the little motor. Congratulations.
Too cool, congratulations. Bulletproof engines, I put a fair amount of miles on 160s and currently have 305 Dream that I ride the snot out of.
The only thing that bums me is that almost no one rides these great bikes anymore.
These "sloper" twins had so much potential. I rode CB-160s, had several of them and commuted on one for years. I set one up for AAMRR amature road racing but never raced it, sold it to a collector years ago. There wasn't much available in speed parts for the small twins though some parts were available in Japan and could be purchased from a Honda racing dept. but negotiating getting them wasn't convenient. Perhaps you could pass along what you did to the engine other than the supercharging. I had one of these 175 engines and noted that the bore to combustion chamber shape was matched - the CB-160 had the valves and combustion chamber of the CB-93 which was a 125cc so the match to the bore wasn't good for reworking for power. There were aftermarket cams and valve springs but the compression was still less than 8.5:1 IIRC.
FANTASTIC!!! Way to go, Rick!!!!!!!!!!!!!! You know how my heart is in the '68!!
Awesome !! I have a stock 1972 CL175 and they’re cracking little bikes , well done , superb achievement
Congratulations, doing "The Ton" on a 175 is amazing.
In the late 1970s NZ had a honda175cc speed record and 11000rpm. My main ride commuter on country roads was a stock CL175 . Only burnt out a piston twice times for slightly out of tune. Wore the ig switch out so I had to tie the key in so it wouldnt fall out.
I was smiling watching this and two thoughts came into my mind:
1. I wonder what Burt Munro would have thought?
2. Wonder how fast it'll go with a streamlined body on it.
My heartiest contratulations.
That’s seriously impressive! My road-going CD175 once reached 85mph
I remember the very first start and ride you did man, all the best, from Texas!
This is the sweetest sounding Honda ever! 🎶🏍
Congratulations! The hard work and engineering paid off
Man.. 103 mph. is FLYING for a little 175 twin! Crazy stuff!😄
I like to make this motorcycle. How can I get the plans?what year Honda 175
Congratulations
that bike is awesome. great work. 11.3k rpm balls to the wall is so sick
Up that record by 60 mph on your second run! She sounds beautiful. Nice job!
I used to have a Honda cd 175 looked very similar to your cl ware engine was sloped and made part of the frame. That bike was extremely fast as standard. Well done on your build and record.
“Off” the frame or of the frame?
Congrats!!! Well done!! Can’t imagine doing the ton on that little frame!
Top job, very well done to you. Excellent build! 👍
We’ll done have loved watching the build and the speed runs went really well you should be well happy with it all the best from the UK
Mr. Honda would be proud!👍🏁
Thoroughly enjoyed this episode!
Congrats on getting that little thing to 100! Sounds awesome.
Real cool! I run a Rick's Electronics charging system in my 1971 CB 350 hotrod. Works great. I live in Arkansas, I need to check out that event.
Amazing, cool motorcycle, and an awesome outcome. The most interesting motorcycle performance video I've seen in a long while. Congratulations!
not only are you brave but know what your doing great job Cheers to setting records !
I have to admit that I am not familiar with the regulations of this record. With that said, in this configuration, the biggest obstacle is now drag (aerodynamic drag). At 100mph there is a lot of it.
I think that, with aerodynamic refinement (with a small weight penalty), the record could be significantly extended.
You probably noticed that when running with the taller gear, the obstacle was more aerodynamic than lack of power.
Good runs, a beautiful build, and a record in the bag.
A job really well done!
Cool beans. THis build has been nuts insane, so more power to you!
Congratulations on passing your goal
I was lucky to get 75 out of my 72 CB 175 down a slight grade 😂😂 Good job mate, you put a lot into it 👍👍
Congratulations!!! Awesome build.
Never heard a 60,s honda twin sound like that before!
WOW!!!! Congratulations! Man, I was sweating on both runs. Way to go! Glad you didn't blow it up, or you would have scraped up those nice leathers LOL!!! There is probably a lot you can do to this current bike to up that record. That is basically a stock motor....... Thinking titanium valves, heavier springs and maybe Carillo rods to lighten up the drivetrain. Plus forged pistons and balancing the whole lot will up your redline significantly. Easy 110mph
Thanks Roland for everything! Yes, the bike has a lot of power still on the table. That blower is capable of at least 25 psi of boost - I just need to make some upgrades before I attempt to push it further. Thanks for all the support throughout this build 👍
these old twins is magic, I've got a CD200 honda and a TX500 twin yamaha. stil looking for a complete enjin for the 500.
My first bike was a CB160 (flat out, it would do about 75) but had put a lot of miles on a friend's CB175. Very cool!
Difference in power btw the 160 and the 175 is insignificant. Classic rides. You meet the nicest people on a Honda! 😄
Gee’s that nice I once made a sprint racer cb200 however it was never anything like that, that’s awesome!!
This was really cool too see. What a cool build. I can relate in a way building single cylinder honda engines with TB Parts big bore and performance parts, mixing and matching different transmission sets and gearing. Even a few MPH dont come easy once youve hit your plateau of RPM-Gear ratio- and fire to the tire. Lol great video and build!
Ive had a 1970 cb 175 since 1996 ...i once did 70 mph chining the tank down hill with the wind up my back😊😊😊
WoW !! Great run and Congratulations. Sometimes you Have to go For broke and your bike Lives thats the best part.
Pretty cool! Like the looks of the bike, it has that 'LSR' look, which has to add some HP!
good job mate,nice thing,piss the front brake off and run a hub,alloy rear wheel covers ,dont worry about the front,all helps for sure
Great job. I bet a bit of areo would go a long way on that thing should see if you can find a feiring for it
Amazing, good the motor held together!
And, not a CB 175, a CL 175!
Quite the accomplishment!
Well done! As long as fuel mixture is good, that motor will turn over 11,000 rpm, no sweat. Cool build, keep tweeking it,,,Izzy Strong
Valve float is the concern at higher rpm
Frikking amazing. Always loved these old small bikes. Fantastic work, looks like it could have come that way.
Is there anything you would do differently, want to add?
Hell yea brother great job that was so cool I would love to do something like that 1 day !!!
Congratulations! A serious effort with a serious reward. Well done. 50cc next?? There's a lot of competition there...
I think I'm going to keep pushing the little 175. It still has a lot of power left on the table, I just need to make some upgrades to it to be able to handle it.
Look it up. non-streamlined 175cc record is 126+ mph. Streamliner 175cc record is 146+ mph. records set in 2010.
This is an ECTA record, standing mile. I never said this is a world record (which are all flying miles). However, I couldn't find the records you stated for the class my bike is in. Could you send me a link at vintageironracing@gmail.com?
Great work on the bike and the record.
I had a CL175 in 1978. My first bike. I scared myself by getting it up to an indicated 73mph going down a steep hill.😅
Waaay cool. I'm pretty sure I was yelling louder than your brother. Taking her to Bonneville some day?
Congratulations!
Congratulations on the record. I don't know if you considered using a 2 stroke 175cc bike, but if you do, I really recommend the yamaha engine. I used to have a dt175 and in stock form they are way faster than it needed to be. I think that with very rudimentary tweaks like a lightweight frame and some tuning, you can easily get over 100 mph
Good recommendation, but 2 stroke is a different class altogether 👍
And, if you want to run the single-cylinder buzz-bombs, the one to get is the *Rotary-Valve* Kawasaki.
It’s the hottest stocker of the early seventies, making over twenty horsepower as it comes from the factory.
Modest mods can almost *double* this figure, supposedly - tuned-length intake pipe with a 30 to 34 mm carb on the outer end(stock is 26mm), modest porting work, and a tuned exhaust…. Stock redline on these was eight thousand.
Note: you’ll wish to check these for vacuum leaks *religiously.* I rode mine home at ~ 75 miles an hour, and seized the rings in the piston - idled really high going off the freeway, then quit entirely a quarter mile from home. Had to push it the rest of the way…. Head bolts lose torque, especially. Check them often after a rebuild, at least a few times. Best to just do a leak down test on a regular basis if you do any real mods to these engines, and run a castor-based oil in the oil tank, e.g. Blendzall ultra or equivalent. (If pushing it especially hard, run a lean premix *In addition to what’s in the oil tank.* Note that this is an old-school trick mentioned back in publications dating from the early seventies.)
Fantastic lads. Such a result 🏁🏁🏁🏁🏁
That was impressive! Good job.
Awesome run. You need a fairing and then try the first gear set!
I saw my bike sitting at the starting line on the tire warmer there in Arkansas!(2:15) Great video.
Awesome! I wasn't able to see your bike make a pass. What did you end up running?
@@vintageironmotorcycles 226mph
Wow
I clocked 77mph at a flying 1/4 with a standard cl175
Burt Monroe ran a velocette and his Indian at the same event
School road Mosgiel nz 1971
Congrats on the record!Pretty neat little ride ya got there.What kind of power does it make at the crank?
congratulations from UK
Nice work.well done maye
Sweet👍most I ever pushed my cd175 home tuned, was 93😊
Had a '66 C77, was great engine.
That sounded just like me going to work every day in my 200cc motorcycle..
Great effort , great result.
I would’ve thought that a full fairing would have made a major improvement to a higher top speed
Did you do any cylinder head porting? Change the conpression ratio? Stock pistons and does it have the solid oil ring?
Never seen any one doing what you are doing. Its awesome!! Just wonder what you have done to the interanls......
WOW! Amazing build.
A great effort on such a small engine, wonderful engineering to get the bike to run at such a high speed...one question, is it permissible to use a fairing/ streamliner...or would the extra weight negate the wind cheating effect
1971 *SL175,* in the early eighties. Very high revving engine, 10.5k…
No S, I had a cobble together big bore Powell stroker xl/cl125 in an xl frame. Roughly 200cc with a 28mm rs cb750 carb. Later model 2 piece head, open Powell header. 18" rear, 35t 17t front. It would pull to 10k and the tach and speedo were matched in 5th. In other words, nothing major, stock looking bike , though loudish, would seemingly clip triples. Stock xl125 with front sprocket and exhaust would do over 75.
Fantastic looking bike and great engineering, sounds really nice too! Just wondering why the display didn't have an aerodynamic nose cone/fairing attached to it as it's every bit counts? Or doesn't it make much difference?
I don't think that you were really pushing the revs too hard. The limit is set for a standard engine not a carefully assembled and balanced competition one. It certainly sounded much happier and definitely ran better at those higher revs. Well done.
The engine has stock internals.
Congrats on the record. Im working on a 172cc engine and an amr 300. Would you be willing to share the ratios you ran and the boost you got. Looking to keep it under 7 psi.
Good job. Looks great.
the only thing missing on the bike was the box on the back to hold your spam and tomato sandwiches and your flask of tea