Question about 2002 Yamaha TT-R 250

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Yamaha 2001 ttr 250. Bogs above half speed, under load

I have a yamaha 2001 ttr 250. A week ago it was ok, next day it starts fine idles ok, but bogs bad above half speed when accelerating, seems like engine just cuts off, bogs under load, will accelerate very slowly, seems to rev up ok sitting still. New plug, cleaned air cleaner, cleaned carb jets, float bowl clean. Please help.

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I have the same problems with my 1999 TTR 250, were you able to find out anything?

Walt
goalhawk@hotmail.com

Posted on Aug 07, 2010

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2001 yamaha ttr 250, starts, idles ok, bogs at acceleration


Has the bike been stored for any long length of time?
old fuel in the carburetor will turn to a varnish like residue blocking the jets,or possibly water in the carburetor.

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