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I am having trouble with my Honda xr600r :thumbsup:, since polishing the inlet, outlet ports and fitting a performance tail pipe,i have raised the needle

one groove down,i am att the moment using standard air filter,waiting for twin

air to arrive.no matter what i do i cant stop the bike juddering,it feels as if it

is misfiring,i have not changed the main jet or the pilote jet,so could this be the problem.please please help someone out there.

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The bike tickover is fine,revving up is fine,but to try and ride at a constant speed say 40mph the bike judders,i have changed the spark plug, still the same judder,but i can say that att full bore it runs good,shame about the speed camaras.

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Your the man,it runs so sweet now,none of that jerkyness,so should i just stay with the standard main jet and pilote jet even though the bike is not standard.i am happy the way it is running now,but i dont wont to over heat the engine or any thing like that.and i must say thanks again.jeff

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