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Jimmy,
I have the 90 indy 650 tripple, yes they were pron for the clutch side cylinder leaning out and blowing.
The prob is the air box, on the #2+3 cylinder side the box is 5' deep, on the #1 cylinder the box is 3' deep on top of that the inlet for the air is on the right side.
to cure the problem you jet up 2 sizes on the #1 cylinder to give it more juice.
the guy before me already did it before I bought it, since then 5000 mls no probs.
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