Posted December 30, 20213 yr Hiya, I am trying to sort out a problem with my SR250. Bike starts OK but backfires on 1/2 to full throttle, I've replaced the main jet with a larger one because the exhaust pipe has no baffle and the air filter is now a pod one (bike came like that so I'll work with what I have) I have tried to get a slightly larger pilot jet #50 but so far I'm not quite sure which one is correct. The one I have is #47.5 with 6 holes in the side, there seems to be some out there with no holes in the side and one with 8 holes in the side. Does anyone know which one is right and what the difference is please?
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