clutch balance

[champ7fc]

I am contemplating having the clutch assembly on my 1987 K75S balanced. Can anyone recommend a company to do this kind of operation? Thank you, Craig

[67charger]

I would think any  machine shop that balances engines could do it. What makes you think it is out of balance? 

[champ7fc]

I have checked with two local shops and they have told me they cannot do it. I believe that the assembly is out of balance for two reasons. This was a very low mileage bike when I bought it, still is, only 2060 miles total. The bike was cared for but sat for much of its life. I put about 1500 miles on it since April. I have replaced many items. I had to replace the rear main seal, so while I was at it I also replaced the clutch. Prior to this I had an annoying vibration between 2200- 3000 RPM After replacement of the clutch the vibration is now in the 1500 -2500 RPM range. Admittedly I have not taken the bike out for a ride but in running the bike through the gears in my shed I can hear and feel the vibration much like before but in a different range. Renew clutch, same vibration . Vibes and noise in a different range. Seems like clutch to me. Do you have any other ideas as to what it may be? Thanks for your reply 67 charger. BTW I owned a 69 Challenger back in the day.

[Scott_]

From the factory, part #1,4 & 6 will have been balanced and matched as an assembly. There should be paint spot alignment markings.
If the markings are gone, you only have 9 combinations of rotation alignment possible.
Did you notice any markings when you had the clutch apart?

If you can't find someone to balance it, your only other option would be to rotate the parts in a trial/error search for the balanced alignment. It may take a bit, but it would be no money out of your pocket at least.....

[Laitch]

It's difficult to know by the content of your post whether you're located in Portugal, Paraguay, or Greenland, champ, so recommending a shop for any purpose is challenging for some of us.

First off, why did you replace the clutch on a bike having so little mileage? I can only think of a couple reasons so I'd be interested in understanding your reason.

In addition to Scott's question about noticing marks on the parts, did you mark each part so you could reassemble in its same relationship with the other parts.  There are plenty of places to send a clutch pack for balancing, depending on where you are, of course.

Secondly, what's the vibration? Is it a wobble, buzz or thump? Do you feel it in the handlebars, seat or your sinuses? Maybe the engine performance is being effected by failing wiring or mouse nests in the air box and exhaust pipe. If it were my bike and I were sure that I had bolted it up correctly during reassembly and had no significant parts remaining on the shop floor, I'd ride it to pinpoint the vibration; it may not even exist when ridden.  Chasing phantoms can get costly.

If you can't ride it, chop it into a cafe racer. :hehehe

[F14CRAZY]

When I messed around with clutch balance issues I purchased a used housing with a clear balance mark (the elb/flywheel type thing) and bought everything else new, with clear markings.

I haven't ridden another K but I figured that my bike doesn't have any vibration issues by how it's smoother than the oilhead motoboxer I borrowed from the dealer.  I've put like 25k miles on it since then and nothing's blown up

[jay1622]

There's lots of info regarding the balance marks on the clutch parts. Did you have the yellow/white mark on your clutch housing?

The white marks on the plates?

[jay1622]

My old clutch pack, which was made about the same time yours was. These marks should go 120 degrees apart.

[jay1622]

The plates... Both marks are at the 12 o'clock position. See them?

Oh, and the wife wants to know why I have MC parts in the bedroom!  :hehehe

[F14CRAZY]

I want to say that the marks indicate where the component is heaviest...the whole assembly is not a balanced assembly and putting each at 120 degrees from each other makes the assembly balanced.