trialsmm Posted January 9, 2004 Report Share Posted January 9, 2004 Did I read that someone has had a 250 sleeved down to a 200? I'd like some info in this, please!! Who can do this or is a kit available? Mick USA Quote Link to comment Share on other sites More sharing options...
munch Posted January 9, 2004 Report Share Posted January 9, 2004 why not just use the money to buy a newer 200?? Quote Link to comment Share on other sites More sharing options...
gaby Posted January 10, 2004 Report Share Posted January 10, 2004 I have heard of this being done on TY's, putting a 250 top on a 350 case, although I never had a clear understanding of the benefits. Something to do with larger flywheel/smaller piston = more grip?????? In this case, simply buying a 200 would not give the benefit, right? What is the theory? BTW, you should be able to buy a 200 top end kit from RYP that will bolt on directly. Quote Link to comment Share on other sites More sharing options...
charliechitlins Posted January 10, 2004 Report Share Posted January 10, 2004 Try contacting Wayne Thais through the RYP website. I'm pretty sure, though, that the top ends are interchangeable. Isn't trials an amazing motorsport? Everybody's always trying to make their bike slower! Quote Link to comment Share on other sites More sharing options...
trialsmm Posted January 11, 2004 Author Report Share Posted January 11, 2004 Because the 250/290 stroke is 9.4mm longer than the 125/200, it can not swapped one for one with a 250/290. If a 9.4mm base spacer could be used, the 200 topend/piston could be used to give 192cc. But I don't know if the port timing would match? This would be a great mod if it would work! I'm not going to purchase a new bike, and would like to have a "192" Sherco if if would work out and I'd also have the 250 topend also. Why, just because and viva la differance! Yes, I could sell my bike and buy a used 200,,,,,,,,? Mick Quote Link to comment Share on other sites More sharing options...
trialsmm Posted January 12, 2004 Author Report Share Posted January 12, 2004 Decided to try to sell my bike instead. Maybe find a 200 later? mm Quote Link to comment Share on other sites More sharing options...
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