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Anonymous
Guest
as far as the larger jet size does that go on the inside cyl numbers 2 and 3 and the outside cylers 1 and 4 get the smaller size. Why would the hotter cyls need more gas?
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I think you might have it backwards. The outer cyls need more gas because the inner two burn the fuel hotter and more effeciently (maybe???). All I know is that the outer two cyls should have a little bit higher vacumm during a carb synch- I always assumed that was why.
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Anonymous
Guest
So if the previous owner had the jets switched (which is what I found) could this cause a problem machanicaly ie valves burning
Some models come with a step richer mains in the middle cylinders to help them run cooler.
If yours were reversed, then it's possible you could burn the valves. The mains supply fuel at 3/4 throttle and more. So the bike would have had to been ridden at high speeds for a while to burn the valves. Possible, but I would suspect the tappet clearances are too tight before blaming the main jetting.
If yours were reversed, then it's possible you could burn the valves. The mains supply fuel at 3/4 throttle and more. So the bike would have had to been ridden at high speeds for a while to burn the valves. Possible, but I would suspect the tappet clearances are too tight before blaming the main jetting.