I know there's been a long time since I posten this video but as soon there better weather it will come a new one with all modifications that's been on the bike. Things that has been done is new exhaust, new inlet, wire wheels and som other things.
Not bad English ... Really cool bike . I am thinking about building a small displacement supercharged bike soon. Its alive, its alive!!!!!! Also it's got alot of soul . Dr Frankenstein , Just keep it up on both wheels or at least 1. And your good. God Bless. Pat lab USA.
Thank you. I have done some modifications to the bike this winter, new stainless steel intake, new stainless steel exhaust and some small modifications and adjustments. I have plans of a new video but I will do that when I got the bike completely done. I also got a rear wire wheel from an old CB250 that I will fit to the bike and a CBX550 front wheel complete with the fork. The plan is to convert the front wheel to a wire wheel with adaptors rings and swap to the CBX550 fork but I think this will be the next winter.
Holy Hell!! And I thought my Big Bore mod was sweet on my CB250. This is just another level right here! Just Wow, thats so impressive! 10 PSI!?!? That little peanut motor can take 10PSI!?!? PLEASE MAKE A SPEED DEMONSTRATION VIDEO!
So I race a destroked xr200 compound turbo bike and honestly it's the one cylinder predecessor to this engine. They can take alot of power it's the trans that's gonna give you problems. 100whp shouldn't be an issue for the engine side but the clutch and output shaft won't hold. I can't say I pushed one of these so idk exactly but iv been in enough of these engines and it follows Mr Hondas rule of 300%. That's about what the trans can take and the clutch with some springs frictions and milling the basket for an extra friction with steel. Its possible to make everything very strong though. My bike recently got past 100whp with 155cc and a crap ton of boost I'm actually running a stock set of shafts this year but I added a bearing and support where 3rd gear used to be and this seems to stop the flex and keep the hardened gears with all their teeth. To the guy with this bike I saw you say you wanted to lower the Cr don't I'm running 14:1 and over 60psi on e85. Add water injection and leave it at 9:1. If you add a spacer in the basegasket youl ruin the quench area and have detonation at no power. Do have a way to pull timing but also keep in mind these tiny cylinders are great at fighting knock by virtue of being small. The flame front has to cover less ground in the same time to normal sized engines. Less time for pressure spikes to ignite pockets. If anything tighten it up for the best quech area you can get the better mixing will do more for fighting the knock than Cr ever could and won't cost power. Cams the stock ones are tiny. I actually use yours as doners for my custom cam bigger base circle to start and it almost fits and I get two from each cam. You can cut the base circle down and what you take off there will double in lift just wrap a sand paper roll around half the cam lobe on the base circle side and do the back and forth on a vise until you get the spec you want. Take your time and check often. This is worth a good 10hp on these bikes. As for carb go bigger that thing is restrictive to start off with. From experience your gonna want a 38-45mm carb. Look for something in the slide family not the CV you have. The CV is actually better but if you choose to do that you really need to know those carbs as your gonna need to change most things in it including the slide bleed hole and spring, pilot jet possibly the pilot circuit, main jet, emoltion tube, needle, likely air jets too. That's why I say get a slide carb it's just less to do and know. Do add a stiffer spring the extra vac tends to stick them open with the stock ones. Awesome project love the drive. I would consider adding a jack shaft and moving the blower so you can have a better intake.. that one might be lean but pudding fuel on short pulls look rich until they clear out. Never have a p trap in it basically. If you must do it atleast convert to e85 so it can vaporize easier.
This project was mostly done for fun not maximum power, I think it possible to get a bit more power with not so much work. I'm sure that the transmission will take alot of power, I think the clutch are the same as XR650, and the gearbox are the same as the 400N so it will handle a bit over 40 hp. I really would like to place the supercharger in the centre of the bike where the stock carbs are but it's not possible because of the center piece of frame, in that case I have to cut in the frame. About to rise the boost I have thoughts about that with out lowering the compression and in that case use water injection, I started to experiment with water injection that but I wait to get a pump that I think will be able to use from a friend. I would also be very cool to have a water tank with a skull sticker and the warning of methanol 😉 About the carb, I tried a HSR42, a FCR, a CR33 but it's not work the engine leans out under acceleration even with the HSR and FCR pumper carbs. I talked with some people that have done draw tru superchargers and they say that CV carbs is best to use. I have put a Mikuni ACP-1 accelerator pump on my CV carb and I have also grind throttle needles to my carb and it's runs better now. This winter I have moved the nozzle to the accelerator pump from the carb to the inlet to see if that will give better throttle response when the fuel will be injected nearly the intake valves. Now I wait to the spring to arrived so I can do a test ride.
@@bolarsson2385 just throwing this out there from my experience 40hp is cake to get. My first turbo setup did it with 18psi. I dont think supercharging is the way. I understand lag but singles have a very strong exhaust pulse. If you compare pressure waves to 4 cylinder engines youl see the spike at the beginning of the exhaust stroke is more than 3x the 4cy. With 155cc I had 18psi by 2krpm and if I gagged it anything over 4k it would get the boost needle to 18 as fast as you can open the throttle. The things youl find are most do's to get that power through are clutch and primary ratio. We first swapped to a cfr230 primary as it's a solid 30% taller primary and that means 30% less tq through the clutch. I wanna say with an extra friction and steel this worked great just doesnt like 10k 2step then clutch dump but roll on power it can take 40whp no problem. Any xr200 motor or crf230 would be a great starting point for that. I love the hsr personally but it sounds like you were running the bowl dry. I'd start looking for a restriction in the fuel system and I'd start at the petcock. Hard to flow more than 20hp through it continuously and the bowl acts as a reservoir in between when it flows more. The hsr needle and seat it fine for 140hp worth of flow out of the box. I actually ran one for years with good results until I started getting wild and way off the deep end. These days I run a yoshi mjn as I found too many benefits to it.
@@oliverscorsim I have put a check valve just behind the nozzle to the accelerator pump to prevent getting boost preasure backwards in to the accelerator pump.
Nice motorcycle, what kind of Afr gauge you use, wideband or narrowband? I have turbocharged cb400n (you can find video on my channel) but i still need to do some final tuning and i need to use afr gauge for that. What kind of boost you're making i have wastegate set to 0.5bar but turbo in my setup can easily provide above 1bar.
Thanks, I use an wideband Innovate MTX-L, had an AEM that I bought two years and had it it laying in the box but it show out that the meter was broke out of the box. Had to buy a new one and then I choose Innovate. I have about 0.7 bar but I haven't flat it out yet ;) When I use the supercharger in draw thru application the boost will variate depending of the throttle position. I think something around 0,7 bar i max boost without lowering compression. What turbo do you use? Where have you take out the pressured oil line to feed oil to the turbo? Do you run the turbo in blow thru or draw thru? If you run blow thru what fuel pump do you use to get the fuel in the carbs pressured? My next project will be an 1979 CB250N with turbo.
@@bolarsson2385 Sorry for late reply, i used kp35 turbo from fiat 1,3jtd, vz21 would be much better (especially if you want to turbo 250cc) but it's more expensive. I run blow through setup with original carbs and i use boost referenced fuel pressure regulator and pump from chinese gy6 fuel iniected scooter. I took pressurized oil line from where oil pressure sensor originally was. The only problem that i had was that oil is heated too much by turbo and i had to install oil cooler but in 250 this problem may not occur.
Det här är vrålhäftigt! Jag har också en CB250 i garaget som jag funderar på att skoja till lite, den är ju besiktningsbefriad trots allt :) Har du några mer klipp? Går den riktigt nu?
Denna är besiktningsbefriad men trots detta valde jag att regbesikta den med kompressorn så den är den nu regbesiktad med kompressor. Det är alltså fritt fram att köra den och jag kan vara lugn om polisen skulle vara igång eller om nåt skulle hända, möjligen skulle väl polisen klaga på ljudvolymen. Håller på att fixa lite till på hojen och tänkte snart göra en ny video på den, har gjort nytt insug i rostfritt, monterat accpump och håller på med nya avgassystem i rostfritt. Den går hyfsat bra nu efter att jag slipat en egen trottelnål, men lite finjustering är det kvar innan den går riktigt bra, den är dock fullt körbar utan problem. Har en till CB250 som står i garaget tillsammans med en turbo, för har man en kompressormatad CB250 måste man väl också ha en med turbo. Ska dock fixa till kompressorhojen innan jag tar tag med den bygget.
I did some bushings with tight fit to the pulley that's from some car alternator and it's just "pressed" to the flywheel with the flywheel bolt. I found the new logger "flywheel bolt" on the local car repair shop and I think it's from the front suspension from a Peugeot or some other French car.
@@bolarsson2385 it's a draw thru. Will be using a 1 3/4 inch SU carb. Early days yet tho. Frame is built, blower mount and drive well under way. Hope it will be a rolling mock up by summer's end then I will be stripping the donor engine and doing a careful rebuild.
@@linzimumford3829 Very intressting, I'm looking for a SU 1 3/4 to this bike to. It runs pretty well with the Keihin CV carb with a custom ginded throttle needle and washer inside the throttle to slow down the throttle rise under acceleration. Looking forward to see your build.
Yes my engine is stock inside I was thinking about lower compression with a aluminium spacer between the crankcase and the cylinders but that will also change the camshaft timing so I you need to grind the holes in the camshaft gear to get it right if you rise the cylinders. I might will be on the limit with the boost pressure if I not lower the compression but instead I have plans to try to make a water injection system. I don't remember exactly what the gearing ratio on the supercharger but it's something about1:1,7 and then I got about 0,6 bar boost pressure.
I think the Aisin AMR300 would be a good choise for a 500 cc single, if I remember right it's specified from 250 cc to 600 cc engines. I know that the AMR300 has been used on some SR400 builds and I also think I have seen it on some SR500 build. But I don't know how good thoose bikes you find on the internet work. My bike would not run good before I put on a CV carb and the build I found on the internet seems to use regular carbs.
Your intake after the blower does it have some unevenness on the floor and bends from the welds? This might be your biggest problem not the carb. But an su would look awesome.
I hade done a new intake this winter that I have TIG welded from stainless steel I have to smooth out the bends as much it's possible so I think this will flow better than the old one. This will also looks alot better together with new polished stainless steel exhausts. My old intake and exhausts in this video looks like crap but now when I know that the bike runs with the supercharger I take care of thoose cosmetic things. I also have a rear spoked wheel ready to put on the bike but I need to find a find a spoked front wheel before I put it on the bike.
It don't put much strain om the crank, I have thougt about a bearing inside the pulley that is attatched to the stator cover but I don't think that's nessecary.
I think it would be possible to do that I have seen someone put a AMR300 supercharger to a Yamaha WR250. I think that bike was in a draw thru application, I run my bike in a blow thru application with the carb before the supercharger. But I think it's possible but it's not easy and it will take alot of time but I'm pretty sure it will be possible.
Hello I have the same bike and currently trying to make a turbo setup work but it wont start with the intake plumbing. Could you tell me what size jets you used?
I don't rememember but I think somwhere around 110-130 on first main jet and around 16-180 on secondary main jet but I'm not sure. Do you run the turbo in pull tru? I got my carb before the supercharger the most common is blow tru and have the carb after the turbo, supercharger. I'm not sure if you could use my jetting on your bike, I tkink threr's alot factors that affect the jetting. I also got another CB250N and a turbo in my garage so when this supercharger bike is finished there will be a CB250 turbo build.
@@bolarsson2385 I connected a line from the oil pressure sensor port to the turbo (as a feed line ) and the return line is connected to the oil filter cover. Just make sure your turbo is above the engines oil level (I learned that the hard way)
@@bolarsson2385 My setup is blowthrough with two carburettors and it wont start (on 72 pilot jet and 105 main jet) I think its running extremely rich because the sparkplugs are black and smell of gasoline. How small of a jet do you think i should put in it?
I have no idea of what jets you should use, this Honda is my first build with som kind of "boost". My choice of a supercharger in pull tru was because it's old school and fit on a cafe bike. How have you done with the pressure of the bowl, mabye you have the problem there? I heard of people that have adjustable pitot pipe in the plenum and can adjust air fuel ratio with how the pitot pipe is placed in the airflow of the plenum. I hope to start my turbo build next winter so I'm very interested of your build. I got the turbo idea after read about a 250 cc Honda V-twin with double turbos, double intercoolers and fuel injection and about 150 hp. But my build will be more normal with one turbo and intercooler, but I think I will go for fuel injection because I'm interested to try that. What turbo have you put on your bike?
How much pressure can a turbine hit a Kawasaki H2? 2.5bar It is recommended that you purchase the chop H2 turbo it has.120000rpm Speed of rotation Ordinary turbines are also.0.7 bar Right and left
I'm planning to do an other stupid project with an other CB250N, this time it will be a turbo CB250N in a classic race style. I allready got the bike and a turbo. I'm planning to start the build this winter.
I think that the Nighthawk and the CB250/400N is very similar, I think that the bottom part of the engine is much the same it's just difference in bore and stroke between thoose bikes. I had some thougts to put cylinder, pistons, cylinderhead and chamshaft from a CB400N to this engine but it will only give me about 50 cc extra volume and it semmes not worth all the work for that when I had to mill of the cylinder to fit the shorter stroke on CB250 chrankshaft.
@@bolarsson2385 I believe the nighthawk is a variation of the cb400t hawk, which I imagine is very similar to a cb400n, which I'm not sure if we got that in the states. I have since looked at my bike since watching this video and the engines are pretty close. shortstroke -big bore parallel twin would be super cool though. Greetings from Kentucky!
We used have some CB250N's on the fleet when i was a motorcycle courier in London around 87/88, they are without a doubt one of the worst bikes ive ever ridden, so underpowered in stock form, terrible brakes and bad handling, like the engineering involved in this, but can't think why you would start with such a lemon of a bike.🤷♂
Danka nice build. I'm putting an AMR300 on My 2cv engine I will upload some video when I am finished. Best Wishes Dee
I know there's been a long time since I posten this video but as soon there better weather it will come a new one with all modifications that's been on the bike.
Things that has been done is new exhaust, new inlet, wire wheels and som other things.
Not bad English ... Really cool bike . I am thinking about building a small displacement supercharged bike soon. Its alive, its alive!!!!!! Also it's got alot of soul . Dr Frankenstein , Just keep it up on both wheels or at least 1. And your good. God Bless. Pat lab USA.
Thank you.
I have done some modifications to the bike this winter, new stainless steel intake, new stainless steel exhaust and some small modifications and adjustments. I have plans of a new video but I will do that when I got the bike completely done.
I also got a rear wire wheel from an old CB250 that I will fit to the bike and a CBX550 front wheel complete with the fork. The plan is to convert the front wheel to a wire wheel with adaptors rings and swap to the CBX550 fork but I think this will be the next winter.
@bolarsson2385 do the pulley put much strain on the Crack shaft (vibration)
Holy Hell!! And I thought my Big Bore mod was sweet on my CB250. This is just another level right here! Just Wow, thats so impressive! 10 PSI!?!? That little peanut motor can take 10PSI!?!? PLEASE MAKE A SPEED DEMONSTRATION VIDEO!
So I race a destroked xr200 compound turbo bike and honestly it's the one cylinder predecessor to this engine. They can take alot of power it's the trans that's gonna give you problems. 100whp shouldn't be an issue for the engine side but the clutch and output shaft won't hold. I can't say I pushed one of these so idk exactly but iv been in enough of these engines and it follows Mr Hondas rule of 300%. That's about what the trans can take and the clutch with some springs frictions and milling the basket for an extra friction with steel. Its possible to make everything very strong though. My bike recently got past 100whp with 155cc and a crap ton of boost I'm actually running a stock set of shafts this year but I added a bearing and support where 3rd gear used to be and this seems to stop the flex and keep the hardened gears with all their teeth.
To the guy with this bike I saw you say you wanted to lower the Cr don't I'm running 14:1 and over 60psi on e85. Add water injection and leave it at 9:1. If you add a spacer in the basegasket youl ruin the quench area and have detonation at no power. Do have a way to pull timing but also keep in mind these tiny cylinders are great at fighting knock by virtue of being small. The flame front has to cover less ground in the same time to normal sized engines. Less time for pressure spikes to ignite pockets. If anything tighten it up for the best quech area you can get the better mixing will do more for fighting the knock than Cr ever could and won't cost power. Cams the stock ones are tiny. I actually use yours as doners for my custom cam bigger base circle to start and it almost fits and I get two from each cam. You can cut the base circle down and what you take off there will double in lift just wrap a sand paper roll around half the cam lobe on the base circle side and do the back and forth on a vise until you get the spec you want. Take your time and check often. This is worth a good 10hp on these bikes. As for carb go bigger that thing is restrictive to start off with. From experience your gonna want a 38-45mm carb. Look for something in the slide family not the CV you have. The CV is actually better but if you choose to do that you really need to know those carbs as your gonna need to change most things in it including the slide bleed hole and spring, pilot jet possibly the pilot circuit, main jet, emoltion tube, needle, likely air jets too. That's why I say get a slide carb it's just less to do and know. Do add a stiffer spring the extra vac tends to stick them open with the stock ones. Awesome project love the drive. I would consider adding a jack shaft and moving the blower so you can have a better intake.. that one might be lean but pudding fuel on short pulls look rich until they clear out. Never have a p trap in it basically. If you must do it atleast convert to e85 so it can vaporize easier.
This project was mostly done for fun not maximum power, I think it possible to get a bit more power with not so much work. I'm sure that the transmission will take alot of power, I think the clutch are the same as XR650, and the gearbox are the same as the 400N so it will handle a bit over 40 hp.
I really would like to place the supercharger in the centre of the bike where the stock carbs are but it's not possible because of the center piece of frame, in that case I have to cut in the frame. About to rise the boost I have thoughts about that with out lowering the compression and in that case use water injection, I started to experiment with water injection that but I wait to get a pump that I think will be able to use from a friend. I would also be very cool to have a water tank with a skull sticker and the warning of methanol 😉
About the carb, I tried a HSR42, a FCR, a CR33 but it's not work the engine leans out under acceleration even with the HSR and FCR pumper carbs. I talked with some people that have done draw tru superchargers and they say that CV carbs is best to use. I have put a Mikuni ACP-1 accelerator pump on my CV carb and I have also grind throttle needles to my carb and it's runs better now. This winter I have moved the nozzle to the accelerator pump from the carb to the inlet to see if that will give better throttle response when the fuel will be injected nearly the intake valves.
Now I wait to the spring to arrived so I can do a test ride.
@@bolarsson2385 watch out plumbing the accelerator pump into boost and best of luck
@@bolarsson2385 just throwing this out there from my experience 40hp is cake to get. My first turbo setup did it with 18psi. I dont think supercharging is the way. I understand lag but singles have a very strong exhaust pulse. If you compare pressure waves to 4 cylinder engines youl see the spike at the beginning of the exhaust stroke is more than 3x the 4cy. With 155cc I had 18psi by 2krpm and if I gagged it anything over 4k it would get the boost needle to 18 as fast as you can open the throttle. The things youl find are most do's to get that power through are clutch and primary ratio. We first swapped to a cfr230 primary as it's a solid 30% taller primary and that means 30% less tq through the clutch. I wanna say with an extra friction and steel this worked great just doesnt like 10k 2step then clutch dump but roll on power it can take 40whp no problem. Any xr200 motor or crf230 would be a great starting point for that. I love the hsr personally but it sounds like you were running the bowl dry. I'd start looking for a restriction in the fuel system and I'd start at the petcock. Hard to flow more than 20hp through it continuously and the bowl acts as a reservoir in between when it flows more. The hsr needle and seat it fine for 140hp worth of flow out of the box. I actually ran one for years with good results until I started getting wild and way off the deep end. These days I run a yoshi mjn as I found too many benefits to it.
@@oliverscorsim I have put a check valve just behind the nozzle to the accelerator pump to prevent getting boost preasure backwards in to the accelerator pump.
Nice motorcycle, what kind of Afr gauge you use, wideband or narrowband? I have turbocharged cb400n (you can find video on my channel) but i still need to do some final tuning and i need to use afr gauge for that. What kind of boost you're making i have wastegate set to 0.5bar but turbo in my setup can easily provide above 1bar.
Thanks,
I use an wideband Innovate MTX-L, had an AEM that I bought two years and had it it laying in the box but it show out that the meter was broke out of the box. Had to buy a new one and then I choose Innovate.
I have about 0.7 bar but I haven't flat it out yet ;) When I use the supercharger in draw thru application the boost will variate depending of the throttle position. I think something around 0,7 bar i max boost without lowering compression.
What turbo do you use? Where have you take out the pressured oil line to feed oil to the turbo? Do you run the turbo in blow thru or draw thru? If you run blow thru what fuel pump do you use to get the fuel in the carbs pressured? My next project will be an 1979 CB250N with turbo.
@@bolarsson2385 Sorry for late reply, i used kp35 turbo from fiat 1,3jtd, vz21 would be much better (especially if you want to turbo 250cc) but it's more expensive. I run blow through setup with original carbs and i use boost referenced fuel pressure regulator and pump from chinese gy6 fuel iniected scooter. I took pressurized oil line from where oil pressure sensor originally was. The only problem that i had was that oil is heated too much by turbo and i had to install oil cooler but in 250 this problem may not occur.
Det här är vrålhäftigt! Jag har också en CB250 i garaget som jag funderar på att skoja till lite, den är ju besiktningsbefriad trots allt :)
Har du några mer klipp? Går den riktigt nu?
Denna är besiktningsbefriad men trots detta valde jag att regbesikta den med kompressorn så den är den nu regbesiktad med kompressor. Det är alltså fritt fram att köra den och jag kan vara lugn om polisen skulle vara igång eller om nåt skulle hända, möjligen skulle väl polisen klaga på ljudvolymen.
Håller på att fixa lite till på hojen och tänkte snart göra en ny video på den, har gjort nytt insug i rostfritt, monterat accpump och håller på med nya avgassystem i rostfritt. Den går hyfsat bra nu efter att jag slipat en egen trottelnål, men lite finjustering är det kvar innan den går riktigt bra, den är dock fullt körbar utan problem.
Har en till CB250 som står i garaget tillsammans med en turbo, för har man en kompressormatad CB250 måste man väl också ha en med turbo. Ska dock fixa till kompressorhojen innan jag tar tag med den bygget.
how did you add the pulley to the end of the crank. that is the only part i am worried about on my build
I did some bushings with tight fit to the pulley that's from some car alternator and it's just "pressed" to the flywheel with the flywheel bolt. I found the new logger "flywheel bolt" on the local car repair shop and I think it's from the front suspension from a Peugeot or some other French car.
I'm building a GS550 with supercharger at the moment. Would love to hear yours running.
I'm very interessted of your build, is it a draw tru or blow tru? Carbs of fuel injection?
@@bolarsson2385 it's a draw thru. Will be using a 1 3/4 inch SU carb. Early days yet tho. Frame is built, blower mount and drive well under way. Hope it will be a rolling mock up by summer's end then I will be stripping the donor engine and doing a careful rebuild.
@@linzimumford3829 Very intressting, I'm looking for a SU 1 3/4 to this bike to. It runs pretty well with the Keihin CV carb with a custom ginded throttle needle and washer inside the throttle to slow down the throttle rise under acceleration.
Looking forward to see your build.
WOW!!! Nice!
Riktigt fint bygge
Tackar, men finns en hel del att kvar att göra för att den ska blir riktigt bra både maskinellt och utseendemässigt.
Is your engine having a stock internal? What is the pulley ratio u're using? And how much do you think the efficiency of amr300?
Yes my engine is stock inside I was thinking about lower compression with a aluminium spacer between the crankcase and the cylinders but that will also change the camshaft timing so I you need to grind the holes in the camshaft gear to get it right if you rise the cylinders.
I might will be on the limit with the boost pressure if I not lower the compression but instead I have plans to try to make a water injection system.
I don't remember exactly what the gearing ratio on the supercharger but it's something about1:1,7 and then I got about 0,6 bar boost pressure.
@@bolarsson2385 thanks very much for your answer bro, waiting for ur next update on the project!
Iv seen this before good work
Any idea if one of the small blowers would work on a Buell Blast 500 single?
I think the Aisin AMR300 would be a good choise for a 500 cc single, if I remember right it's specified from 250 cc to 600 cc engines. I know that the AMR300 has been used on some SR400 builds and I also think I have seen it on some SR500 build. But I don't know how good thoose bikes you find on the internet work. My bike would not run good before I put on a CV carb and the build I found on the internet seems to use regular carbs.
@@bolarsson2385 I like the CV carbs,they work well for me on DRs and Harleys
Your intake after the blower does it have some unevenness on the floor and bends from the welds? This might be your biggest problem not the carb. But an su would look awesome.
I hade done a new intake this winter that I have TIG welded from stainless steel I have to smooth out the bends as much it's possible so I think this will flow better than the old one. This will also looks alot better together with new polished stainless steel exhausts. My old intake and exhausts in this video looks like crap but now when I know that the bike runs with the supercharger I take care of thoose cosmetic things.
I also have a rear spoked wheel ready to put on the bike but I need to find a find a spoked front wheel before I put it on the bike.
Do the pulley put much strain on the crank?
@bolarsson2385 ?
It don't put much strain om the crank, I have thougt about a bearing inside the pulley that is attatched to the stator cover but I don't think that's nessecary.
Would this be possible on a 1 cylinder 200cc 4 stroke?
I think it would be possible to do that I have seen someone put a AMR300 supercharger to a Yamaha WR250. I think that bike was in a draw thru application, I run my bike in a blow thru application with the carb before the supercharger. But I think it's possible but it's not easy and it will take alot of time but I'm pretty sure it will be possible.
Hello
I have the same bike and currently trying to make a turbo setup work but it wont start with the intake plumbing. Could you tell me what size jets you used?
I don't rememember but I think somwhere around 110-130 on first main jet and around 16-180 on secondary main jet but I'm not sure.
Do you run the turbo in pull tru? I got my carb before the supercharger the most common is blow tru and have the carb after the turbo, supercharger. I'm not sure if you could use my jetting on your bike, I tkink threr's alot factors that affect the jetting.
I also got another CB250N and a turbo in my garage so when this supercharger bike is finished there will be a CB250 turbo build.
I'm curios how you have done with the oil pressure to the turbo on your bike? Where have you conneted the pressure line to the turbo?
@@bolarsson2385 I connected a line from the oil pressure sensor port to the turbo (as a feed line ) and the return line is connected to the oil filter cover.
Just make sure your turbo is above the engines oil level (I learned that the hard way)
@@bolarsson2385 My setup is blowthrough with two carburettors and it wont start (on 72 pilot jet and 105 main jet) I think its running extremely rich because the sparkplugs are black and smell of gasoline. How small of a jet do you think i should put in it?
I have no idea of what jets you should use, this Honda is my first build with som kind of "boost". My choice of a supercharger in pull tru was because it's old school and fit on a cafe bike.
How have you done with the pressure of the bowl, mabye you have the problem there? I heard of people that have adjustable pitot pipe in the plenum and can adjust air fuel ratio with how the pitot pipe is placed in the airflow of the plenum.
I hope to start my turbo build next winter so I'm very interested of your build. I got the turbo idea after read about a 250 cc Honda V-twin with double turbos, double intercoolers and fuel injection and about 150 hp. But my build will be more normal with one turbo and intercooler, but I think I will go for fuel injection because I'm interested to try that.
What turbo have you put on your bike?
How much pressure can a turbine hit a Kawasaki H2? 2.5bar
It is recommended that you purchase the chop H2 turbo it has.120000rpm Speed of rotation
Ordinary turbines are also.0.7 bar Right and left
I'm planning to do an other stupid project with an other CB250N, this time it will be a turbo CB250N in a classic race style. I allready got the bike and a turbo. I'm planning to start the build this winter.
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this engine looks very similar to my nighthawk 450 motor, giving me bad ideas.
I think that the Nighthawk and the CB250/400N is very similar, I think that the bottom part of the engine is much the same it's just difference in bore and stroke between thoose bikes.
I had some thougts to put cylinder, pistons, cylinderhead and chamshaft from a CB400N to this engine but it will only give me about 50 cc extra volume and it semmes not worth all the work for that when I had to mill of the cylinder to fit the shorter stroke on CB250 chrankshaft.
@@bolarsson2385 I believe the nighthawk is a variation of the cb400t hawk, which I imagine is very similar to a cb400n, which I'm not sure if we got that in the states.
I have since looked at my bike since watching this video and the engines are pretty close.
shortstroke -big bore parallel twin would be super cool though. Greetings from Kentucky!
What is the supercharger off buddy ?
I'm not sure in what cars the AMR300 is mounted, but I think it is from some kind of Japanese mini cars.
We used have some CB250N's on the fleet when i was a motorcycle courier in London around 87/88, they are without a doubt one of the worst bikes ive ever ridden, so underpowered in stock form, terrible brakes and bad handling, like the engineering involved in this, but can't think why you would start with such a lemon of a bike.🤷♂