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    270/90 crank pins? 2022

    Gentlemen, Is there anyone making the 270/90 pins for the XS in 2022? I heard one on U-tube with some nice pipes built at Hugh’s and it really sounded good? Is there a big difference between the 270 and the 277 as far as balance and power? And can a 256 cam be cut and welded to put into a...
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    Normal Headflow Stock Head, The best?

    Does anyone have stock headflow numbers @28? I’m curious, I have done the short side twist and the 3 angle valve job. I was wondering what the best stock head through the years might be? My bet is on the XS2. But I d like to see some bench numbers. I’d like wire a bike Kickstart only, nothing...
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    The True XS2 cam specs/ vs 1973 US EPA mandated changes.

    I am sure that the XS2 has a better cam but I wonder about something. My father-in law had an XS2 that he would ride alongside mine before I tore mine down and did a top end with an overbore some Shell Thuet pistons, lightweight pins at 700+ ccs and my own tricks , a 3 angle valve job and a...
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    Press and disassembly specifications to rephrase a crankshaft and Yamahas recommendation for rejection?

    I was wondering what the specs are for breaking the right side for a rephase to 277/83 , moving three splines forward and pressing back together? I had a Yamaha of press specs for a good or a bad crank. I would rather not weld a crank for future bearing replacement. Sending one to a machine...
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