01-05-18, 08:26 PM
Ah! So there's a curious thing...
My valve was noisy (rattly) and one of the the pulley plate bolts had sheared so I put in to the mechanic. He replaced some collars, a bush and a housing and adjusted the cables and charged me loads of money.
The valve did sound much quieter.
But the cables had been adjusted 30 degrees too far anticlockwise (valve closed). I adjusted them correctly. Now the bike is exactly as loud as it was before.
Adjusting the valve too far closed quietens it right down.
I wonder how many mechanics do that instead of servicing it...
So, my next question to the good folks of this forum - what should I do to quieten my valve down?
If what the mechanic has told me is true then he has already replaced the bush on the opposite side to the pulley. He didn't replace the bush on the pulley end because they was so much more expensive as you have to get the whole pulley plate, apparently. Obviously, I could replace the pulley-end bush/plate assembly now. How do I test whether it's out of service limits? Just measure the free movement, I guess.
The vale is only noisy when pulling away from a bend/roundabout at low road speed and low engine speed - my gut tells me that it might be end-float due to the bike being lent over. Yeah, sure, centripetal force should cancel the lean out but still there could be an end-float issue, right? Anyway, there's only three places it could be rattling - in the two end bushes and end-float. How would I measure end-float? Is it adjustable? I guess I can just bang in washers to take up and slack if there's no approved method...
Any advice much appreciated.
I'll not be taking it back to the mechanic I used before!
My valve was noisy (rattly) and one of the the pulley plate bolts had sheared so I put in to the mechanic. He replaced some collars, a bush and a housing and adjusted the cables and charged me loads of money.
The valve did sound much quieter.
But the cables had been adjusted 30 degrees too far anticlockwise (valve closed). I adjusted them correctly. Now the bike is exactly as loud as it was before.
Adjusting the valve too far closed quietens it right down.
I wonder how many mechanics do that instead of servicing it...
So, my next question to the good folks of this forum - what should I do to quieten my valve down?
If what the mechanic has told me is true then he has already replaced the bush on the opposite side to the pulley. He didn't replace the bush on the pulley end because they was so much more expensive as you have to get the whole pulley plate, apparently. Obviously, I could replace the pulley-end bush/plate assembly now. How do I test whether it's out of service limits? Just measure the free movement, I guess.
The vale is only noisy when pulling away from a bend/roundabout at low road speed and low engine speed - my gut tells me that it might be end-float due to the bike being lent over. Yeah, sure, centripetal force should cancel the lean out but still there could be an end-float issue, right? Anyway, there's only three places it could be rattling - in the two end bushes and end-float. How would I measure end-float? Is it adjustable? I guess I can just bang in washers to take up and slack if there's no approved method...
Any advice much appreciated.
I'll not be taking it back to the mechanic I used before!