Looking for a good clutch master cylinder. Also DD clutch spring. Thanks
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If yours isn't pitted on the seal area, you should be able to rebuild the cyl, the kits are cheap. I posted the part # recently in another thread. Make sure that the bore is clean, 220/320/400 grit wet-or-dry sandpaper, then lube the seals when you install them. Dry-fit to put the piston seal in, wet seal for the pushrod.
FYI, the OEM diaphragm spring should provide sufficient tension to not-allow clutch-slippage. Doing the DD is something you do because you drag-race the bike, or otherwise provide 'severe-duty' operation of the clutch.
PCW in Schenectady NY has the heavy-duty diaphragm spring, I use one and am happy with it. It's not as-hard to-pull as the DD mod, but provides an increase over the stock spring clutch action. Call them, their web presence isn't set-up for ordering easily. I am NOT a facebook participant, I took this off google, so don't cry if it doesn't work.
https://www.facebook.com/PCW-Racing-Inc-598910693460082/about/?ref=page_internal&path=/PCW-Racing-Inc-598910693460082/about/
Here it is, Yamaha OEM:
Push Lever Seal Kit
26H-W0098-00-00
$25.88
https://www.ronayers.com/oemparts/a/yam/50045c10f8700209bc7942f8/clutch
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