Clutch Boss

6 replies to this topic
  • Clod_Thrower

Posted March 06, 2001 - 09:12 PM


Last night I tore into my clutch to install my PE clutch basket on my '00 426. After looking at the parts I noticed the clutch boss had some grooving along with the old basket which I round filed. Has anyone else had the boss problem? How many '00 426 guys have had to buy these? I smoothed out the grooves but I know this is a temp. fix at best. $$$$$$$$

  • MikeOK

Posted March 07, 2001 - 12:44 PM


I used to file the gooves on my YZ250, several times in fact. It is temporary but I don't think it is necessary to replace it until you have filed it so much that it doesn't line up right. Lots of 2smkoe racers I know do this regularly. I hear that aftermarket baskets like the Hinson are much more durable so it may be worth the cash to upgrade...

  • dirtdad

Posted March 07, 2001 - 03:21 PM


Just in case you're interested, I have a hinson inner hub (clutch boss). It is MUCH more durable, is machined (not die-cast) so it spins truer, and has extra oiling holes in it for better oil flow to the plates. A big improvement if you don't mind the cost.
It's about $285 from Hinson, but you may be able to get it cheaper somewhere. I couln't find anywhere that carried it other than Hinson! Hope this helps.

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  • Boit

Posted March 07, 2001 - 09:44 PM


Clod: That's a very interesting observation concerning the clutch boss. I only intalled the Hinson basket on my '00 426 and don't remember any grooving on my boss....not that I inspected it. Are these grooves on the boss splines where the plates make contact? Were these grooves noticeably deep? If my clutch becomes grabby again, I think I'll go with the Hinson boss and pressure plate as well.

  • Clod_Thrower

Posted March 07, 2001 - 10:11 PM


Boit, Yes they were on the splines. They were deeper than the grooves on the basket. It took me several hours to get them out. Hinson sounds like a good idea. I hope everything works got a race on Sunday. Still haven't got my lower fork tube (dented, parts guy ordered wrong part) so I will be oiling the track. Oh well, if the clutch works good at least I will be in front for awhile.

  • smrmx

Posted March 08, 2001 - 03:54 PM


My clutch boss was grooved and I replaced it with the stock one 35.00 ...And at the same time I drilled the whole thing duplicating the oil hole in every raised area . I figured that I could not hurt it to bad it's only 35.00. So far so good the clutch has never felt so good ...I will keep you informed on the mod after I get some more hours on it

  • Clod_Thrower

Posted March 08, 2001 - 09:23 PM


That seems like a overkill, hope it works. I did drill my holes that were there to a larger diameter.

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