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'81 R100RS: Bars keep rotating up/down

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Richard W
(@wobbly)
Posts: 2597
Member
Topic starter
 

Sold my '79 and moved on to a '81 model. This bike has the real RS bars, but the bars don't have any type of knurling at the clamp locations. Thus, when I'm man-handling the bike on/off the center stand, they often rotate up/down. It's also started to do a little of this on the road... which can be very "unnerving" in a corner. I have tightened down the 4 clamp bolts so tight that I'm afraid of breaking the aluminum top clamps.

Is there a secret to keeping these bars from rotating in the clamps ??

Owning an old Airhead is easy.
Keeping an old Airhead running great is the true test.

 
Posted : 05/31/2020 12:18
Richard W
(@wobbly)
Posts: 2597
Member
Topic starter
 

Important point there, about the 22mm bars. Much obliged.

Think I'll try adding some surface roughness to the bars via center punching. That's a great idea.

Thanks.

Owning an old Airhead is easy.
Keeping an old Airhead running great is the true test.

 
Posted : 05/31/2020 13:06
James Strickland
(@8053)
Posts: 423
Reputable Member
 

Beer can ribbon shims would be good, cheap fun.
I like Scott's idea of using a punch to raise burrs in the contact zone.

former Airmarshal, IL.

 
Posted : 05/31/2020 13:10
Richard W
(@wobbly)
Posts: 2597
Member
Topic starter
 

OK, so I removed the bar caps one at a time and added center punch dimples to the top side of the bar. That fixed it !

Great suggestion. Thanks again.

Owning an old Airhead is easy.
Keeping an old Airhead running great is the true test.

 
Posted : 06/02/2020 07:38

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