06-05-2008, 12:37 PM | #1 |
Join Date: Jun 2008
Location: Elizabeth City, NC
Posts: 95
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legality of engine swaps
Just curious, but does anyone know if it would be legal to swap a larger displacement engine into one of these bikes?
Seems like that might be a way to gain some added grunt, since I seem to remember seeing some larger displacement engines out/coming out. |
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06-05-2008, 01:32 PM | #2 |
Join Date: Jan 2007
Location: Northern Vermont, USA
Posts: 1,271
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What do you mean by legal? Like registration legal? Of course, you resister the frame, not the engine.
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First Chinabike: 2006 Roketa RSX200E Current Chinabikes: 2023 Titan DLX & 2022 Lifan KP Mini w/ 210cc BRT kit, 22 RWHP! |
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06-05-2008, 01:46 PM | #3 |
Join Date: Dec 2006
Posts: 291
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Well, that's gonna be the ultimate mod for me. I'm thinking of squeezing in a 400-450cc single. I figure the Suzuki DR-Z400 engine or the Honda CRF450 engine might be a good fit. 40+ hp should wake up my (S)Tank 250 2i very nicely!
Nuff said! olds_cool63 DON'T BE A SQUIDIOT! 8) |
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06-05-2008, 02:18 PM | #4 | |
Join Date: Jun 2006
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Posts: 2,302
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Re: legality of engine swaps
Quote:
(lifan doesnt like YOU messing with stuff) Actually I have been kicking around the idea of putting in an old honda 350 twin in my dualsport but I really think it is to big. But then there is the old rd400 from yamaha that is a twin cylinder screaming 2-stroker that what make for a quick little bike and it would most likely be able to fit. So who's going to be the first NUTT to put in a 1000cc + 4 cylinder :?: :?: :?: |
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06-05-2008, 02:34 PM | #5 |
Join Date: Apr 2007
Location: Toronto Ontario Canada
Posts: 2,585
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I don't know about anywhere else, but I'd talk to my insurance company first. I like to ride legal and have bases covered and papers in order. I was thinking about getting a perfect engine for my cb, same size and popping it in. I don't want to crash, and find out I'm not covered, and now owe $$$$. If I was serious, I'd pick up the phone and find out.
TeamCheap, if you want engine mesurements for a cb 350 twin motor, let me know. |
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06-05-2008, 02:41 PM | #6 |
Join Date: Mar 2008
Location: Saint John, N.B.
Posts: 279
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I think the best bet is to look at other Chinese engines, as I think wiring/bolt patterns would be very similar, if not identical. From what I can see, the Saga 250 engine LOOKS identical to a Lifan OHC engine, but I am NOT 100% sure. I really wish someone would try this.
Remember Bataycan? I SUSPECT his big bore kits were simply stock kits from the 229cc and 247 cc China bike engines, but nobody ever found out. I would NOT put any more than about 25 hp in this frame, even if I could. It really needs new suspension more than any other mod, in my opinion. |
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06-05-2008, 02:50 PM | #7 |
Join Date: Apr 2007
Location: Toronto Ontario Canada
Posts: 2,585
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Kawazacky That's true.
CB350 motor (325cc's) =36HP. That and the extra weight and torque would be too much without extra metal bracing and suspension changes. |
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06-05-2008, 06:27 PM | #8 | |
Join Date: May 2008
Location: New Franklin, Missouri
Posts: 243
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Re: legality of engine swaps
Quote:
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06-05-2008, 06:37 PM | #9 |
Join Date: Feb 2008
Posts: 392
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Yup.I think these bikes really only comply with safety standards with the engine size thats on them......If you upgrade I would consider making it an off-road only bike.in order to make a larger engine work you might have to modify the whole bike to be safe.I dont think a very experienced motorcycle driver or tech would advise a heavy upgrade.....any pro will tell you as with learning control and skill you need to go slow.speed is easy.slow and steady wins the race.unless you drive a Ducati, but in that case you just lost a whole lot of money when you eventually wipe out and you will if you leave all the safety up to the bike.....I wouldnt go higher than 250cc on a china bike unless your closed course or Todd Colbert! :P
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06-05-2008, 07:22 PM | #11 |
Join Date: May 2007
Location: Altamont, Kansas
Posts: 15,103
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People swap engines all the time. Just call it a replacement engine.
Allen
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06-05-2008, 07:31 PM | #12 |
Join Date: Jun 2006
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Posts: 2,302
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yurkia, if you do it you'd be the TOP NUTT.
I'd put a honda 350 twin or a rd400 yamaha engine but thats mostly because I'd love to have a twin cylinder, dual exhaust bike. The 2-stroke would be fun but it is best for off road IMO. I dont like the thought of a 2-stroke seizing on the road. I think they banned them from road use anyway.(not sure its been so long) I know there are better singles out there that would be less trouble.(SNORE-boring) I wouldnt be doing it for max HP just somewhat increased performance but mostly the totally different one-of -a-kind effect. |
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06-05-2008, 07:36 PM | #13 |
Join Date: Jun 2008
Location: Elizabeth City, NC
Posts: 95
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I was thinking water cooling would be nice as well, I do have some traffic to deal with.
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06-05-2008, 08:05 PM | #14 |
Join Date: Jun 2006
Location: directly under the earths sun............NOW
Posts: 2,302
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I dont think you'd have any LEGAL troubles with an engine swap.
A nice liquid cooled single, 4 stroke in the 300-350cc range ridden within reason most likely wouldnt tear up a china bikes frame. I still would not run it down the road doing 70-80 mph though. It really comes down to what you want. If its a bike that has a 400cc liquid cooled engine and can take some good amount of punishment then look to the big name bikes or just save a wad of cash and be happy to be riding a china bike that will get you around nicely and can be extremely fun in its own right. |
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06-05-2008, 08:09 PM | #15 | |
Join Date: Jun 2008
Location: Elizabeth City, NC
Posts: 95
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Quote:
You wouldn't even ride one of the street bikes at that speed? |
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