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Gears grinding when trying to shift up or down
Gears grinding when trying to shift up or down
Tommy
1967 R69s + a bunch of Ducatis
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Re: Gears grinding when trying to shift up or down
1. Pre load shift lever , this means apply light pressure to lever with foot, not enough to move it but enough to put pressure on it
2. Let off gas and pull in clutch at the same time
3. Count in your head “1-2”
4. Click up shift lever with foot
5. Let out clutch and accelerate.
This will help you smooth out the shifts before you damage your gearbox. I also use Lucas 85-90W gear oil and my bikes snick into gear with no clonks whatsoever. DOWNSHIFTING is a whole other ball game …you have to have the bike at the right speed , right revs, and you have to “stab” it quickly to get it to downshift with no noise. I am getting good at it, but I have almost 30k miles under my belt , it takes PRACTICE! Good luck!
R69S - R60/2 - R67/2 - R51/3 - R69
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Re: Gears grinding when trying to shift up or down
Re: Gears grinding when trying to shift up or down
1. Preload shifter
2. Roll off throttle
3. At same time barely pull in clutch (not sure why I do this since I am essentially doing clutchless upshifts)
4. Upshift
5. Start to roll on throttle
6. Let out clutch
All of this happens in about 1 sec. I guess I need to slow things down quite a bit!
For downshifting do you recommend blipping the throttle to rev match? That said, given how sloppy the throttle is I doubt that I would be able to match the revs very well anyway!
Tommy
1967 R69s + a bunch of Ducatis
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Re: Gears grinding when trying to shift up or down
R69S - R60/2 - R67/2 - R51/3 - R69
Re: Gears grinding when trying to shift up or down
Downshifting I have pretty much mastered. I've found that my 59 R69 likes higher speeds/rpm than lower for cleaner quieter shifts.
Re: Gears grinding when trying to shift up or down
What is the trick for downshifting? Do you need to blip the throttle to rev match or do you just ease out the clutch slowly?Gossamer wrote: ↑Tue Sep 20, 2022 3:54 pmI have the same thing going on with mine. The guys that helped with my resto bascially told me get to speed, pull in the clutch count, shift, etc.
Downshifting I have pretty much mastered. I've found that my 59 R69 likes higher speeds/rpm than lower for cleaner quieter shifts.
Tommy
1967 R69s + a bunch of Ducatis
Re: Gears grinding when trying to shift up or down
The only reason for pre-load on mine is to not shift too lackadaisically and land in a false neutral. But pre-load has never been a necessity to avoid a gnashing of teeth.
When on the center stand, put it in gear, with the clutch lever pulled, rev the engine. The back wheel should not react.
Is there a synchronizer in the transmission that could go bad?
I use 40w oil in the transmission as the manual specifies, not gear oil. I doubt that would make a difference.
Don
EDit: On mine there is no trick to down shift, pull the clutch and press the lever smoothly with confidence.
All on the road, going no where in particular in the Finger Lakes of New York
Re: Gears grinding when trying to shift up or down
Tommy
1967 R69s + a bunch of Ducatis
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Re: Gears grinding when trying to shift up or down
As long as it is not hitting the frame while shifting no need to change it
Tommy
54 R51/3, 55 R50/Velorex 560 sidecar, 64 R27, 68 R69US, 75 R75/6
Ashfield, Ma
USA