Clutch and pressure plate

marioaz · #1 05-14-2009, 03:38 AM

Is the pressure plate supposed to be centered on the clutch plate? New Grubee and the first clutch had a wobble and the pressure plate rubbed the ring gear. Vendor promptly sent a new clutch. This one doesn't rub but definitely not centered.

If the picture posts it is of the first one that rubbed. The new one is almost rubbing.

**Norman** · #2 05-14-2009, 09:59 AM

Some of these engine will rub the case with the big gear, Use a dremel with a carbide burr or sanding drum to grind the case for clearance. Your engine might have been produced after an all night binge of heavy drinking or what ever they do in China.
Norman

**Bikeguy Joe** · #3 05-14-2009, 11:19 AM

No, it's not good or normal...it will cause noticeable vibration when you ride.

marioaz · #4 05-14-2009, 03:12 PM

Norman, that's a good fix for the gear rubbing on the housing. In the pic, it's the pressure plate off center and rubbing on the ring gear. The replacement clutch unit finds the pressure plate not rubbing but almost and way off center. Thanks for the responses before I contact the vendor again.

**Norman** · #5 05-14-2009, 11:20 PM

Yes the pressure plate should be centered

Oh Dang! I didn't really see that the first time I though your big gear was rubbing the case now i see the silver pressure plate touching the big gear. looks like something is off center there and I'm not sure which is off the silver plate or the as you caledl it the ring gear. are the bearings sloppy? First time I've seen that you might want to get a complete different engine if its still new. There's bearing in the ring gear and they are not in a cage if it comes apart they will scatter to the 4 corners of the earth. I wonder if you might have some bearings missing or none at all I think there is around 50 or so 3mm ball bearing not sure on the count I'm probably off on the count.
Norman

marioaz · #6 05-15-2009, 03:46 PM

Here's a pic of the second clutch. Stiil way off center. The vendor spot welded behind the clutch plate so it can't come apart. When I removed the first clutch I couldn't see any obvious problem. It wasn't coming apart. The replacement clutch doesn't rub, but almost.

**Norman** · #7 05-15-2009, 08:51 PM

either your clutch is not machined/drilled in the center or your main shaft is bent or off centered that looks weird!
I think they should send you a replacement engine.
Norman

marioaz · #8 05-19-2009, 03:30 PM

Update. Figured it out. Measured from center of shaft to inside of big gear and it was true. The pressure plate center hole, and 3 locating pin holes are over 1/16" off center. If you look closely at the full pic, you can see the locating holes are inside and outside the beveled/countersink surface. It's obvious it slipped on the jig, or whatever it is they use. Joel at USA Bike Motors is sending another pressure plate. Super prompt friendly service from those guys in Tucson!

Pablo · #9 05-19-2009, 05:44 PM

They are never perfectly centered, but yours looks pretty bad!

**Bikeguy Joe** · #10 05-20-2009, 02:40 PM

Quote:

Originally Posted by marioaz

It's obvious it slipped on the jig, or whatever it is they use.

I think that is called "Holding it between your knees while drilling it with a single speed drill and a made in China bit.".

That's funny Joe I'll bet your right!
Norman