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Topic-icon Balancing the rear wheel R100GSPD

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4 weeks 1 day ago #6752 by 16077
Balancing the rear wheel R100GSPD was created by 16077
Finally rev'd myself up to change the tires on a 1993 R100GSPB. Going to less aggressive metzlers.

Pulled off the rear thinking (wrongly) that I could use an old axel to balance it off the bike. Come to realize the monolever single sided suspension has no axel or what I thought, a slot that might take an axel... so I can't see how you're supposed to balance it. Special tool?

thanks

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4 weeks 1 day ago #6754 by 8166
Replied by 8166 on topic Balancing the rear wheel R100GSPD
I have a Snap-On spin balancer, and turned an aluminum cone to fit in the center hole of the GS rear hub. It slips over the threaded shaft of the balancer, and the open side of the brake drum butts up to the flat side of the balancer. Works fine.

Not sure about this idea, but you might be able to turn a pair of cones with angles steep enough so as not to meet each other when they're pushed into the opposite ends of the hub. Then you could put a threaded shaft through the center of those cones, letting the outer ends ride on pairs of bearings or knife edges.

There are also bubble balancers out there that hang from the ceiling, and the cone idea might work for those, too. Without knowing what balancing tool you're trying to use, though, it's hard to say what would work.

8166 Scot Marburger, This email address is being protected from spambots. You need JavaScript enabled to view it.

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4 weeks 23 hours ago #6756 by 16077
Replied by 16077 on topic Balancing the rear wheel R100GSPD
Yeah, I'm total a cave man balancer. Used an old bicycle truing stand for a while - then build a simple jig out of wood. It actually works pretty well.

But thanks, you give me some good ideas. All you really need is the ability to see the wheel to spin freely.

thanks

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4 weeks 21 hours ago #6757 by Wobbly
Replied by Wobbly on topic Balancing the rear wheel R100GSPD
Yes, like Scot said. A special axle with inward facing cones is used to "chuck up" the wheel. Then when everything is tight, that axle sets on 2 new bearings with very light lubrication.

You can buy these type generic balancers at general tool stores, but you may need a lathe to trim the cones to work on a BMW wheel.

Don't hide 'em, Ride 'em !!
#15150

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3 weeks 1 day ago - 3 weeks 1 day ago #6783 by 16077
Replied by 16077 on topic Balancing the rear wheel R100GSPD
I found this online - really, really nice. Marc sent exactly the right balancer and it works great. Can be used on both the GSPD and the R90/6Not cheap, but beautifully manufactured. Here's what I purchased: BML kit and a set of BA17 adapters - www.marcparnes.com
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Last edit: 3 weeks 1 day ago by 16077.

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3 weeks 1 day ago #6786 by Wobbly
Replied by Wobbly on topic Balancing the rear wheel R100GSPD
That's exactly what you need.

You also need to know, new tires are marked (one side only) with a paint dot at the lightest part of the tire. The valve stem is considered the heavy part of the wheel. So the paint dot is always placed next to the valve stem. This will reduce the number of weights needed for balance.

Go for it !!

Don't hide 'em, Ride 'em !!
#15150

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