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  Thumper Racing Complete parts kit with sleeve installed in your cylinder -CRF 250R/X 04-08-
  Thumper Racing Big Bore Kit CRF 250 R/X 04-08
Thumper Racing Big Bore Kit CRF 250 R/X 04-08
  
Retail Price $550.00



Product Code: THUMPER_RACING_CRF270A

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Description
 
Wiesco builds our 81mm piston and we added more skirt to help stabilize
the piston in the bore. By adding more skirt we feel that our piston
will have a longer life than the stock piston. Our 81mm piston kit has
a compression ratio of 12 to 1 and will need to run 93 octane or
better.The 270 kit give better botton and mid while still allowing the
motor to rev like a stock 250. The complete parts kit includes
81mm piston kit
81mm sleeve (installed in cylinder)
Top end gasket kit
Jetting kit
Oil filter
 

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Thumper Racing Complete parts kit with sleeve
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Thumper Racing Complete parts kit with sleeve installed in a new cylinder -CRF 250R/X 04-08-
Thumper Racing Big Bore Kit CRF 250 R/X 04-08
Retail Price $750.00
Thumper Racing Big Bore Kit CRF 250 R/X 04-08
Thumper Racing Big Bore Kit CRF 250 R/X 04-08
Retail Price $725.00
Thumper Racing Complete parts kit installed in motor with the vavle adjustment


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