This might be old news to many but, I have an Austrailian 85 RZ that had a blown lower crank seal I needed to replace. While I had it apart I ran across the info on RZBills site about the Yamaha TSI changing the balancer to drive off the upper crank. At first, I didn't think it applied to mine since I have an 85 but low and behold, mine was running off the lower crank.<br>I set it up according to the TSI and it made a world of difference. For hte price of a gasket and a couple of hours, this should be a MUST DO for anyone with an RZ.
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jwillard@oac-inc.com