crf50?

[jtbarnes89]

has anybody mounted a crf50 motor on their bike?

 

[jtbarnes89]

anybody?

 

[5-7HEAVEN]

Probably not.

Can you give more specifics on this engine and the bike it came off of?

FWIW, the 2hp 50cc Lifan clone engine/trans weighs 42lbs. There are lighter engine choices, like a 4.2hp GP460 engine, which weighs about 7 lbs.

 

[jtbarnes89]

HONDA 2004 crf70 motor and trans its a four speed with no clutch

 

[HeadSmess]

heavy. illegal. sorta a daft idea.

what sorta brakes you intend on using?

frame? wheels? drive system?

sure... kill a perfectly good feefee, but um...why? you end up with a bigger, flimsier or heavier, crf50...

 

[ccpomea]

heavy. illegal. sorta a daft idea.

Illegal in what way?

 

[HeadSmess]

illegal as in what country are you in, and where are you going to ride this thing?

here? i wouldnt be getting my license back til 2020 if i got caught riding one of them on the road....

now if your in india, its different, innit?

 

[ccpomea]

Based on him mentioning a CRF50 I would assume he means the stock engine, which is 49cc - just as legal as any other 49cc.

 

[JunkyardDog]

First he said a CRF50, then a CRF70. A CRF50 would be legal, as long as you keep your speed down. In AZ, where motorized bicycles are legal, they have a max displacement of 48cc (that's 48cc, not 49cc) I'm riding my 49cc Solex as a motorized bicycle, but if I were ever involved in an accident, and the police or some lawyer started checking, they would find out it is not a legal motorized bicycle. A Solex is fairly well known, and everyone who knows anything about them knows they are 49cc. My guess is a CRF50 is also 49cc.

As far as making it work, anything can be done, but why? There are so many other engines out there that are far more suitable as a bicycle engine. How and where would you mount it, what kind of drive train would you use, and being a 4 speed, how would you shift it? Also, since a CRF50/CRF70 is an MX engine, they make a lot of power for their size, and tend to be really peaky. You would need a strong heavy bicycle to mount it on. Jerry.

 

[HeadSmess]

Based on him mentioning a CRF50 I would assume he means the stock engine, which is 49cc - just as legal as any other 49cc.

yep, here, 49 cc is legal too.

as long as its registered. which involves VINs.. money...paperwork...

oh, and you also need a license... unless i move state, then its just the rego.

and you arent going to get a bicycle with a crf50/z50/xr50 engine strapped onto it registered.