@@leoa4c idk aproxomatly but my bike is an 03 and it has the factory bottom end so it’s 21 years old I’m gonna rebuild it in a month because I have an oil leak. But the reliability just depends on the maintenance I run the shit out of my bike tho it’s bored out with a race head and a rev box and it’s run this way for 2 3 years
Having been a race mechanic for *more* than a few decades I have to compliment you. Nice vid, solid camera work, clean and concise directions/instructions. Not too much or too little of anything, well done. Now you just need an old fart like me to show you how to port a 2 stroke so it screams, I have my tricks :) but they are my tricks and I choose not to share too much. Hey, a guy has to have a few secrets, right ? I learned from the old legends like Terry Drake (Drake Offenhauser) and Louie Unser (Al Unsers brother, Bobby's uncle). Kinda surprised I haven't seen you mess with a Zenoah engine or two....or a bigger Honda twin like a GX 690 or sumpthin ? From what I've seen, not too bad of a shop, still need a few things, but it appears you're getting there.
Big thanks for posting these informative and entertaining videos. I'm still curious about the various breather tubes running from the crankcase cover to the valve covers. I've watched two of these upgrade videos and these tubes suddenly appear without explanation both times. My apologies if I'm showing my ignorance.
Awsome motor. I just bought a 420cc predator today. I will be doing some modifications in the future. This is a fantastic build I love all the Billet parts
@@RedBeardsGarage if I put a flat top pistons in place of the dished piston on a 420 overhead valve non Hemi head how much will it raise the compression
I need a couple thousand dollars to burn. That engine is freaking nice! The white shroud with the gold, and the black block with the billet and gold, man, that is an awsome looking engine!
Dang dude you've gotten so good at building these engines. I'm guessing the struggles are cut out but you make it look effortless and informative. Not to mention you make it look bad ass, its a beast motor but it ain't meant to be like a pushing all the limits engine, but you got it lookin like that. The Allen bolts with the countersunk spacers look so frickin good. You should do some kinda fast watercraft build this summer some kinda budget friendly tutorial. 212 pedal boat? Built 420 on little fishing boat with some contraption to convert it to a clutched propeller, idk man something crazy get the people in
@@RedBeardsGarage yeah, water stuff is a fun build but from what I've seen with cars and cameras is keeping the thing sealed up, and when it ain't it goes south quick lot of back breaking work getting it out. And a jet ski will it run is fun but ain't really a build or much informative past having the same model. A more custom water sport build would be awesome
Hi Red me again forgot to mention I’ve been rebuilding my Kawasaki mule like the one you did putting in a DuraMax 715cc?? Man I just got a deal on a DuraMax 16hp 420cc and I’m dropping in my mule never never have I done this before but I’m going to try it myself watching your videos have inspired me in growing a set and getting it done there’s too many people out there who charge too much for doing this work my mules been sitting for more than 2 years bought it with a bad motor but you confused me talking about the dif going in reverse changing it around replacing it with a golf cart dif….got to go back and watch that video several times to understand what you were saying anyways wish me luck later brother Red😊😊😊
Love it! I’m working on a 420 now and doing my first pulse pump installation with a top plate. I’d really appreciate some tips for pulse/ venting and throttle hookup. Thanks for all the great content!
Fantastic build video RB great video shots tips and tricks to get the most of the engines performance. Your the king of small engine repair and fabrication. 🤘💀 Ride Fast!
S0 how much hp did it end up making? Im doing a similiar build with a440 stroked 420 non hemi with ported head 40mm and 34mm valves 306-0411 cam flat top piston .027 head gasket billet everything arp studs for everything.34mm mikuni flat slide carb and custom header.
This brings back so many memories. Except back whenever. I was into Go Karts and Mini Bikes we're talking 50 plus years ago. Back then, as kids, we were so poor that we used to take the cardboard off the backs of the paper we used to get at school And use them for head gaskets. I remember one of the engines that we had was an old Tecumseh (I think that's how you spell it) Engine. (Such as were the memories back then) We rebuilt that engine and it ran like a raped ape.
Have you since had any problems with the 65 pound springs I’m running 50s on mine but have had issues in the past with cam wearing out the exhaust lobe
Normally the spark plug gets ground through the head and on through the block to the coil. Grounding the coil to the head instead of the block helps a better transfer of power.
What I would LOVE to see is a V Twin motor set up with a Miniature 671 Style Blower . Then run it on Nitro Methane . Then Build a JR type of Dragster and see what that baby would do in the 8th mile .
Stupid question are any of these parts compatible with the 459? I wish I would have found this before I got it over the 420 😖🤬.. I like the videos and appreciate your humor sir!
How do you tell the difference between the hemi and non hemi 420? I've seen people say it's the torque rating on the box, the part number, and the valve cover.
The part numbers are different on the box. As for the motor the hemi has a rectangular valve cover and internally the motor head is hemispherical (round).
What is the valve to piston clearence? I am doing g the exact build and only have .025 intake valve to piston. Maybe want to check that before people build a motor that gets destroyed right away
Would you recommend an engine swap like this 420 over the 459 in a ezgo golf cart? Seems like I’ve been seeing a lot of small issues popping up in the 459.
you wedgied that seal out with a screw driver, will it be reused ? crazy how easily it came out as well, seems always have to reach for the dremel, that motor did not look to used and abused tho, may have helped?
@@RedBeardsGarage what was porting size you had done in this build and here did you get the piston head, and coil for this build I’m trying to mimic your build 😅
in Brazil we do this type of preparation in a motorcycle engine like the Honda cg originally 150cc and with adaptations it reaches 500cc but the most common is with 270cc, also very common with Honda CBX 250cc Twister engine is the most common with 450cc.
1st. Excellent video and great tutorial. Honestly the best build video on TH-cam. Love seeing you make video like this!!! Have you ever considered building an air cooled outboard motor for a boat? Either a mud motor of just a re-power of an old clapped out 2 stroke? I bet you could make a really interesting video about that.
What are you using for a fuel pump? Did you go electric or are you running a pulse pump? Also are the hoses from the valve cover to the motor to equalize pressure?
Question why exactly did you cerakote the piston?????? Never heard of that before ! Would this help stop cold seize in cast iron jug /aluminum piston build to some extent?
@@RedBeardsGarage great we gonna try to be ready . Had 4x4 go out on my atv. If not 2 whl it is . Got a few days left.🤞 Oh we live in Paducah but visit lakes alot. Do y'all know where the camping spot is yet. I know some good of grid or on either way. Love LBL!!! Oh have y'all ever been to Whrights Area 252 in Bardwell ?
I was wondering if using that coating on the block would cause it to have less heat transfer. Being that it is air cooled you want to get the heat out of the engine quickly as possible. I love the build & as usual you've shown me some things I didn't know.
The best way to get heat out of an engine is to minimize heat transfer into the head and block, and ensure the highest exhaust temperature. Free flowing exhaust carries the most heat, allow it be cooled by contact with the block/head area, lowers the heat, lowers the thermal expansion of the exhaust gases, slows the movement of gas volume, so it more time/contact with the block and head port. Porting is mainly about keeping an even cross-section to minimize "volume change" in the intake charge, to keep low velocity flow smooth, constant going in, and keeping the exhaust cross-section change minimum, to minimize heat transfer as the rate of flow changes. Slight change in port volume changes velocity of flow, allowing more energy transfer equally more heat transfer from the exhaust into the block.
Hi Red you always amaze me how talented you are and knowledgeable you are you’re a beast builder. Can you tell me if you can rebuild one and ship it out to me is that at all possible..just asking because I know it would be great if you can thanks always appreciated your videos brother Red👋👋👋
Hey Redbeard, how come you don't put the piston rings on from the bottom, then put the wrist pin in? I noticed that you scuffed up the ceramic coating quite a bit pushing the piston rings on from the top.
I got a question Red Bull if I shoot you the motor and the rest of it what would you charge me to build me one I'm not up to the 400 yet I'm still dealing with the smaller engine on a mini bike but I'm wanting to use it on a drag strip
RB you’ve got the best, ‘How To Build’ videos for small engines! 👍👍🎉🎉🎉🎉🎉🤘🏻🤘🏻
ผมอยากชื้ออะไหร่จากคุณ
@@OppoOppo-cn5no hjbbbZkhgyhs vb
Generator
11
Have to agree. Straight forward, to the point, and detailed.
I can confirm
The valve spring compressor I used on my klx 110 and a friend used it on a Honda foreman 500 it works perfectly
How many hours can these small engines do before a rebuild (approximately)?
@@leoa4c idk aproxomatly but my bike is an 03 and it has the factory bottom end so it’s 21 years old I’m gonna rebuild it in a month because I have an oil leak. But the reliability just depends on the maintenance
I run the shit out of my bike tho it’s bored out with a race head and a rev box and it’s run this way for 2 3 years
Having been a race mechanic for *more* than a few decades I have to compliment you.
Nice vid, solid camera work, clean and concise directions/instructions.
Not too much or too little of anything, well done.
Now you just need an old fart like me to show you how to port a 2 stroke so it screams, I have my tricks :) but they are my tricks and I choose not to share too much.
Hey, a guy has to have a few secrets, right ?
I learned from the old legends like Terry Drake (Drake Offenhauser) and Louie Unser (Al Unsers brother, Bobby's uncle).
Kinda surprised I haven't seen you mess with a Zenoah engine or two....or a bigger Honda twin like a GX 690 or sumpthin ?
From what I've seen, not too bad of a shop, still need a few things, but it appears you're getting there.
its not a 2-stroke
@@robgto7051 duh ?
That is the baddest mini bike engine I’ve seen.🔥🔥🔥🔥🔥
I really like seeing the results of the resin
Professor RB this is the best how to instructional video I have ever seen, 👍🏾👍🏾👍🏾👍🏾
Best videos for learning and i seriously hope to have the common knowledge of you one day
I love this build. Should have done this video on 420 👌
I'm putting one on my mini bike build cause it's 420 erryday
Man that engine is sick‼️
Anybody would be absolutely thrilled to rip this beast! Great work as always guys 👌🏼
Big thanks for posting these informative and entertaining videos. I'm still curious about the various breather tubes running from the crankcase cover to the valve covers. I've watched two of these upgrade videos and these tubes suddenly appear without explanation both times. My apologies if I'm showing my ignorance.
I’m getting some serious “Trucks!” On HotrodTV in the 90’s vibes from this video!
Awsome motor. I just bought a 420cc predator today. I will be doing some modifications in the future. This is a fantastic build I love all the Billet parts
Enjoy it
@@RedBeardsGarage if I put a flat top pistons in place of the dished piston on a 420 overhead valve non Hemi head how much will it raise the compression
Love watching these engine builds. That thing looks sweet.
I love your work, I really amazed
If I have a money i buy engine like this , some day🙏
I need a couple thousand dollars to burn. That engine is freaking nice! The white shroud with the gold, and the black block with the billet and gold, man, that is an awsome looking engine!
What's crazy is that your predator 225 from the other video makes over 20 with just over half the capacity!
Wow that’s amazing.I can’t wait to hook up my 459cc engine.Great video.
Dang dude you've gotten so good at building these engines. I'm guessing the struggles are cut out but you make it look effortless and informative. Not to mention you make it look bad ass, its a beast motor but it ain't meant to be like a pushing all the limits engine, but you got it lookin like that. The Allen bolts with the countersunk spacers look so frickin good. You should do some kinda fast watercraft build this summer some kinda budget friendly tutorial. 212 pedal boat? Built 420 on little fishing boat with some contraption to convert it to a clutched propeller, idk man something crazy get the people in
I have been wanting to do something for the water for years. I will put it on the project list. Thank you for supporting us!
@@RedBeardsGarage yeah, water stuff is a fun build but from what I've seen with cars and cameras is keeping the thing sealed up, and when it ain't it goes south quick lot of back breaking work getting it out. And a jet ski will it run is fun but ain't really a build or much informative past having the same model. A more custom water sport build would be awesome
@@RedBeardsGarage I'm sure you could hook up a 420 or 670 to a little jet boat
They make a mud motor (long shaft with surface drive prop ) for the small singles
@The Real Huck Finn breathers I'd think. Lots of air moving in a high rpm motor.
Idol im watching your videos...very power your engine set-up
Hi Red me again forgot to mention I’ve been rebuilding my Kawasaki mule like the one you did putting in a DuraMax 715cc?? Man I just got a deal on a DuraMax 16hp 420cc and I’m dropping in my mule never never have I done this before but I’m going to try it myself watching your videos have inspired me in growing a set and getting it done there’s too many people out there who charge too much for doing this work my mules been sitting for more than 2 years bought it with a bad motor but you confused me talking about the dif going in reverse changing it around replacing it with a golf cart dif….got to go back and watch that video several times to understand what you were saying anyways wish me luck later brother Red😊😊😊
That motor sounds so angry, love it! Great video!
I hope one day I have a machine like yours♥️
Thank you.🥰👍🙏
Great engine ..maybe this is good to install to a small boat ..good for fishing adventure...
My man this on a small to med surface drive would be the baddest thing that side the Mississippi 🤙
Love it! I’m working on a 420 now and doing my first pulse pump installation with a top plate. I’d really appreciate some tips for pulse/ venting and throttle hookup. Thanks for all the great content!
Fantastic build video RB great video shots tips and tricks to get the most of the engines performance. Your the king of small engine repair and fabrication. 🤘💀 Ride Fast!
What are the clear lines you have going into the valve cover ? And how did you plum it in ?
Great vid even though I know this it was still so good I just kept watching great job. Master Craftsman make it an ART. 👍👍😃😃🥰
S0 how much hp did it end up making? Im doing a similiar build with a440 stroked 420 non hemi with ported head 40mm and 34mm valves 306-0411 cam flat top piston .027 head gasket billet everything arp studs for everything.34mm mikuni flat slide carb and custom header.
That is a gem.
Bravo......no turbo.....cheers
This brings back so many memories. Except back whenever. I was into Go Karts and Mini Bikes we're talking 50 plus years ago. Back then, as kids, we were so poor that we used to take the cardboard off the backs of the paper we used to get at school And use them for head gaskets. I remember one of the engines that we had was an old Tecumseh (I think that's how you spell it) Engine. (Such as were the memories back then) We rebuilt that engine and it ran like a raped ape.
Have you since had any problems with the 65 pound springs I’m running 50s on mine but have had issues in the past with cam wearing out the exhaust lobe
No but I have been using a hardened cam to protect against that.
@@RedBeardsGarage thank you I am now using the 308-gx390 cam from go power sports and 50 pound springs I’m hoping for the best this race season
@@hammerdown5568 what do you race with this engine?
These would be sick ass mud motors
Parabéns ficou muito bom seu trabalho com quantos HP ficou depois que você trocou as peças
Please explain how the extra ground strap from the coil to the head helps spark.
Normally the spark plug gets ground through the head and on through the block to the coil. Grounding the coil to the head instead of the block helps a better transfer of power.
@@RedBeardsGarage thank you
Great job guys great video
What kind of compression ratio did you end up with on this motor with the flat top piston? Also was the head milled at all?
That is gorgeous
What I would LOVE to see is a V Twin motor set up with a Miniature 671 Style Blower . Then run it on Nitro Methane . Then Build a JR type of Dragster and see what that baby would do in the 8th mile .
Rewatching this as I’m building a gx390 stroker and I noticed at 11:28ish, it sounds like someone ripped a big one or your shop has barking spiders 😂😂
Nice work and tools 👍
Stupid question are any of these parts compatible with the 459? I wish I would have found this before I got it over the 420 😖🤬.. I like the videos and appreciate your humor sir!
Please do more builds like this. I would love to see a 420 or EC carburetors 460 road to horsepower dyno build.
How do you tell the difference between the hemi and non hemi 420? I've seen people say it's the torque rating on the box, the part number, and the valve cover.
The part numbers are different on the box. As for the motor the hemi has a rectangular valve cover and internally the motor head is hemispherical (round).
What is the valve to piston clearence? I am doing g the exact build and only have .025 intake valve to piston. Maybe want to check that before people build a motor that gets destroyed right away
So informative
Question is the coating “polish” to allow flow in porting or is the inherent in the coating?
Hi whouldn it be a good idea to balance everything.
How much issues do you have with the valve seats
I run these motors on my generator and I have hell with the valves always have to readjust the valves
I’m wondering would this fit on a rascal mini bike frame
How do you change the battery, with. out the charging. coils???
Can I ask why the four clear tubes from crank case to rocker cover?
Would you recommend an engine swap like this 420 over the 459 in a ezgo golf cart?
Seems like I’ve been seeing a lot of small issues popping up in the 459.
you wedgied that seal out with a screw driver, will it be reused ? crazy how easily it came out as well, seems always have to reach for the dremel, that motor did not look to used and abused tho, may have helped?
I took my 420 to a dyno shop, same build as this. It made 33hp and 46 ft lbs.
How much did you spend on parts? Trying to see if building would be more cost effective than just buying a 670cc engine.
@@CantoniaCustoms honestly, it depends what you are trying to do, I have my 420 on a doodlebug. I spent about 2200$.
@@IanStClair-dy1eu Ah, I'm just trying to get 22-25 hp. Planning on shoving it into a Kubelwagen or Jeep lookalike.
@@CantoniaCustoms unless ur wantin to deal with the extra size, weight & parts of the 670... just go with the 420 & build it
Love the videos. Very informative.
I have a question for you. I’d like to put a modified predator 420cc engine into a Honda Navi. Is this doable?
Basically a $2500 motor
I like it
I like the thump of that cam. I’m 6’1” 280 lbs. curious what a cart like this would cost?
Great video as usual but wish you would have talked about installing the starter ring gear on the flywheel.
It simply bolts on.
@@RedBeardsGarage Did you have to drill the flywheel. In your parts line up I saw the ring gear separate from the flywheel.
@@RedBeardsGarage what was porting size you had done in this build and here did you get the piston head, and coil for this build I’m trying to mimic your build 😅
in Brazil we do this type of preparation in a motorcycle engine like the Honda cg originally 150cc and with adaptations it reaches 500cc but the most common is with 270cc, also very common with Honda CBX 250cc Twister engine is the most common with 450cc.
Straight beast.
God bless
That thing is SICCKKK!!! 🔥
What kinda socket did you use to do the rod bolts
A very high quality video
Allsome work that looks really nice 💕🌟👌😁🎉 from cruzermans inventions 😁🎉🌟
1st. Excellent video and great tutorial. Honestly the best build video on TH-cam. Love seeing you make video like this!!! Have you ever considered building an air cooled outboard motor for a boat? Either a mud motor of just a re-power of an old clapped out 2 stroke? I bet you could make a really interesting video about that.
3rd time watching this video 📹 👌 Great content
Did any of the available soon parts ever become available?
So I got a Briggs and want to put a big filtered carb on it but it will fit with a gasket so should I do it
Red beard I would like to know what you charge to build this engine for my trailmaster hurricane pro??
Amazing job 👍
What material are the clear hoses made out of?
What are you using for a fuel pump? Did you go electric or are you running a pulse pump? Also are the hoses from the valve cover to the motor to equalize pressure?
Proud of your skills
Question why exactly did you cerakote the piston?????? Never heard of that before ! Would this help stop cold seize in cast iron jug /aluminum piston build to some extent?
Good job👍
Effective insulation for an aircooled engine....coat or paint the block and head. Basic math and set of calipers will be leagues ahead of plastiguage.
Beautiful build. One other thing. Gapless compression rings.
That would mean a broken ring once the engine gets hot.
No it’s a twin ring for the top compression ring. Gaps are offset and compression forces them together sealing piston tighter.
Where to buy all the billet parts so that I can do the same to my engine. Thanks
Ok you guys got it great info. Hey what about turkey bay it's says rain y'all still up for it?
Yes sir. Rain or shine we will be riding
@@RedBeardsGarage great we gonna try to be ready . Had 4x4 go out on my atv. If not 2 whl it is . Got a few days left.🤞 Oh we live in Paducah but visit lakes alot. Do y'all know where the camping spot is yet. I know some good of grid or on either way. Love LBL!!! Oh have y'all ever been to Whrights Area 252 in Bardwell ?
What are the racing parts can recommend me for the Pro Quip 22hp engine high speed...
I was wondering if using that coating on the block would cause it to have less heat transfer. Being that it is air cooled you want to get the heat out of the engine quickly as possible. I love the build & as usual you've shown me some things I didn't know.
I was thinking the same.
The best way to get heat out of an engine is to minimize heat transfer into the head and block, and ensure the highest exhaust temperature. Free flowing exhaust carries the most heat, allow it be cooled by contact with the block/head area, lowers the heat, lowers the thermal expansion of the exhaust gases, slows the movement of gas volume, so it more time/contact with the block and head port. Porting is mainly about keeping an even cross-section to minimize "volume change" in the intake charge, to keep low velocity flow smooth, constant going in, and keeping the exhaust cross-section change minimum, to minimize heat transfer as the rate of flow changes. Slight change in port volume changes velocity of flow, allowing more energy transfer equally more heat transfer from the exhaust into the block.
He said on a livestream a few weeks ago that the type of coat got he used is supposed to help expel heat
what a beauty man soo nice
Red beard where did you get the big block gold dress up bolt kit from because on your link I only see bolt kit for 212
KillerBolts.com
You think you could build a 420 like today and make it compete with ex 400 honda 4 wheeler if in same frame and equal weight?
Hi Red you always amaze me how talented you are and knowledgeable you are you’re a beast builder. Can you tell me if you can rebuild one and ship it out to me is that at all possible..just asking because I know it would be great if you can thanks always appreciated your videos brother Red👋👋👋
Did you remove the governor and balance
You can also put more timing in that buy using a off set fly wheel key. But I'm sure you know that. Most people dont
Hey Redbeard, how come you don't put the piston rings on from the bottom, then put the wrist pin in? I noticed that you scuffed up the ceramic coating quite a bit pushing the piston rings on from the top.
What about the balance shaft is it not necessary or what
I injoy to watch your video sir'how to build a powerful single piston engine? But how many cm"the diameter on your bore sir? Sir
Man this is awesome. Just subscribed and excited to see new videos. Great job brother and God bless!!
Thanks for the sub!
What is the large thing hanging off the end of the connecting rod end cap?? Summon please I must know?!?!?!?!
From one bald red beard to another nice build
What size bolt do you use for 420cc predator and 40 series comet for crankshaft
Can anyone tell me how many hours these small engine builds will do before needing an overhaul?
Many thanks.
I'd like to know what clearance work was needed for the cam.
I got a question Red Bull if I shoot you the motor and the rest of it what would you charge me to build me one I'm not up to the 400 yet I'm still dealing with the smaller engine on a mini bike but I'm wanting to use it on a drag strip