Author Topic: YDS7/RD350 Racer clutch  (Read 2351 times)

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Offline Will Curtis

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YDS7/RD350 Racer clutch
« on: May 30, 2019, 08:43:25 PM »
Hi everyone just discovered the forum, I’ve built a race bike a few years back based on a YDS7 with a few mild upgrades (porting,expansion pipes etc). Anyway over the winter I decided to upgrade it to a 350 using a set of Fahron ported barrels. It turned the bike into a rocket ship but unfortunately it found it’s first weak spot being the clutch. It lasted two races before a bang and no drive. It had sheared the clutch spring bolts off of the inner hub. So my question is chaps, does anyone know of a upgrade to fit? I was think an RD350 clutch from an A or B model with new plates and stiffer springs? Would this fit on the YDS7 13 teeth gearbox shaft? Many thanks Will


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Re: YDS7/RD350 Racer clutch
« Reply #1 on: May 31, 2019, 12:11:37 AM »
we used to pack the springs or put an extra plate in.Stick with the 250 primary and clutch-basket it spins up quicker and revs faster ;)