If it's going lean on only one cylinder, then it won't be anything to do with the T.P.S.

Maybe the left crank seal drawing some air, a warped/cracked/leaking inlet manifold/rubber, or weak jetting/needle in the left carb.

The stock and HRC X and Y pieces effect BOTH cylinders equally. The power jets are independent of one another, and will make the jetting progressively richer as the RPM (and therefore airflow through the carbs) increases. This is what can make setting with them tricky, and why HRC eliminate them. The bonus of using the power jets is that you can use smaller mains which makes low to mid-range throttle more responsive.

Remember, the HRC X and Y are for use with NO airbox and NO power jets. As with pretty much any HRC part, it's unlikely to work unless you use ALL of the kit!

Try going down on power jet size on the right cylinder and upping the mains in both carbs. A stagger on the jetting is common, and even if you run two mains that are the same size, you are still staggering the jetting by using two different PWJ's.
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Andy.
NSR-WORLD.COM

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