I hate to say it and go against the "norm", but when I used the HRC jet kit I had alot of problems. Reliability and power were both down, spooge was horrible out the pipe. The midrange sucked. And I am no slouch when it comes to jetting. I have no experience with using the kit with the oil injector pump blocked off/running premix, though. I think the kit is probably best when used with a heavy castor-based premix and full engine race mods.
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Paul Herr
'88 FZR4/GSXR/YZF Frankenbike
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