Balance Beam

[Albervin]

Can someone tell me how many patterns of F55 balance beams were made and if there were different patterns, when were the changes made?

 

[clevtrev]

Can someone tell me how many patterns of F55 balance beams were made and if there were different patterns, when were the changes made?

You probably got a slightly different shape every time the pattern wore out, and was replaced.

 

[davidd]

Weren't the B's a different size for the Bramptons?

David

 

[Albervin]

That is what I was asking, indirectly. Michael Breeding is proposing to make some "Series B balance beams" that have curved ends http://www.mikesvincentparts.com/COMING VINCENT PARTS.htm. I can't say I have ever seen them on a B as I have not looked particularly closely at them on other bikes. Bs are quite uncommon here in Australia, especially with Bramptons still fitted. I had to mount my balance beam not in accordance with the drawings (MO30) to clear the spindles so was wondering whether I had an incorrect balance beam.

 

[Dinny]

The B's with bramptons do have the BB's with the ends curved. I guess that's why yours is not mounted as per drawings as its the one off girdraulics.

Mark

 

[Len Matthews]

One thing to watch out for is that replacement Brampton spindle nuts have larger hexagons than the originals therefore there's a risk of the brake cable adjuster fouling these nuts when applying the front brake.

 

[A_HRD]

KTB says that the ends of girdraulic fork BBs can be bent forwards by about 15 degrees to suit Bramptons. I guess they would need a fair amount of heat to bend safely without cracking or breaking...

Peter B
Bristol, UK.

 

[A-BCD]

The B's with bramptons do have the BB's with the ends curved. I guess that's why yours is not mounted as per drawings as its the one off girdraulics.

MO30 can also refer to Bramptons...

 

[A-BCD]

One thing to watch out for is that replacement Brampton spindle nuts have larger hexagons than the originals therefore there's a risk of the brake cable adjuster fouling these nuts when applying the front brake.

Only had this problem on the nearside, see how I relieved the locknut - an original nut would have been OK
As I have fitted the cable to the 'wrong' end of the balance beam, when applying the brakes the beam moves downwards away from the spindle locknut.

 

[Albervin]

This is where I became confused (again). The drawing shows the beam in front of the forks but I mounted it in between the tubes. I have now checked the beam on my A and see it all now....
I will now obtain a correct balance beam and tidy up another area on the bike. Are the correct Series B knurled brake adjusters available while I am at it?