Aprilia RS50 engine swap

[johnnyplantat...]

Is it possible to swap out the engine for something that will really get the bike moving? If anyone has any insight as to where to look for this info, or even if a bigger 2 stroke is compatable with fabrication please let me know.
thanks
Ted
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rs50 swap

[G]

Unless you have a lot of money you want to throw away at a project for the sake of it, I suspect it'll be a lot cheaper to just get a bigger bike.

I think you can get 80cc bore kits to give you a bit of extra umph though.

[priller]

look here

https://www.apriliaforum.com

There a few rs50's in usa with different engines, a RM125 and a wr450 conversion.

Or you could tune the 50 engine, lots of bits around 75cc kits, exhausts, 21mm carb etc.

[Rift.]

yeah there is no point modifing that bike you might aswell save and get a beta bigger more fun bike!! (no offence)

the parts will cost (big dolla) aswell as the extra insurance costs(more dolla) and servicein unless you do it yourself. (hassle)
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You only live once so get a bike and ride

[Kickstart]

Hi

Not sure how old your RS is.

On the older ones the frame is steel (think the newer ones are alloy, but not sure). The steel frame is easier in one way as you can easily weld brackets on. However there is not that much spare and you will have a nightmare of a job trying to get a suitable rear sprocket to take any extra power. Think they use a 420 chain which is tiny. Going for a larger chain would mean a different rear sprocket and the standard one is unusual due to the splines in the middle because of the single sided swinging arm.

Also the chassis is fairly crude.

Given the costs involved I would say it would be a hell of a lot cheaper to buy a 125 (and it is easy to fit a Rotax 257, 250cc single engine into an early RS125).

Mind you something that looks like a 50 but goes damn quick could be amusing, but the problem there is that the RS50 does not (to the uninitiated) look like a 50.

All the best

Keith
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