SOHC.co.uk Forums > CB500/550
Tightening sequence for bar clamps ?
K2-K6:
It's common engineering practice to design one side to touch, giving datum surface to clamp geometry and make the hole essentially round to match the spindle once that dimensionis established with first fixture (bars are going to be more varied in tolerancing than wheel component) then the second bolt only has to gently apply friction to stop it moving. Because it touches all the way round, if designed correctly, the torque to achieve clamping is relatively small.
It's very similar to the fork stanchion bore/clamp but with the convenience of being able to split it for assembly.
Both tightened to touching is a different joint, the crank mains being one, that doesn't clamp but tries to produce an accurate bore even though it had to be split for access.
Sesman:
Like I said…if stepped….
Orcade-Ian:
My own 400/4 also has stepped (as Sesman calls them) clamps - don't know about any dots because the washers are hiding that area. My 350/4 has the row of idiot lights like 500 and that unit has no step so would be tightened evenly front and back. Not sure if 550/400 for other markets are different arrangement and if life is only 1 day long, News at 10 has just finished, so can't be arsed checking!
(IDHTTL)
Ian
Sesman:
Hey, Ted. Have a look in the Aladdin’s cave at ‘CB550 F1 set up’ manual and you will have your answer. Had a closer look at my clamps and there is indeed a punch mark on each clamp facing forward.
McCabe-Thiele (Ted):
Ill take a peek.
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