The best bang for the buck on the 92~94 Vmax-4's would be clutching. You could change the driven clutch to the 95 or newer, or install a Cat driven with the coversion shaft and a Comet drive clutch. I cust. made 72gram clutch weights for the stock clutch and it sill overreved. With a cust. 92~94 helix costing $100 plus, it can add up and still not work as good as the Cat.
Do you have quad pipes or twins? Any motor mods? With your stock 92 CDI you need to shift under 8250 rpm.
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