Re: Worn splines
Posted: Thu Sep 16, 2010 6:28 pm
Hmm, thanks for that Jean. I'm a bit troubled about the new gearbox - there is a noticeable whine (more a light whining rattle) in neutral and first with the clutch engaged. I'll be checking the throwout race first (I should have before the box went in, I know). Then I'll pull the box and check for this possible misalignment issue. (I've always wanted to own a dial indicator. I'll feel like a professional mechanic for a moment or two.)Jean wrote:There is a picture of worn splines in the really OLD Chilton's manaual I have...that says splines worn the way shown in the earlier photo are due to a misalignment between the engine and tranny.
I also noted in the discussion that the clutch parts were worn unevenly, so that matches with misalignment.
If this tranny hasn't been installed yet...I'd sure do some checking with a dial indicator on the flywheel,etc. and then a straightedge on various parts to see where the misalignment might be.
Runout between the outer edge of the flywheel and the mounting flange of the engine is given as 0.010 inches or less.
I wonder if this is the result of not replacing parts at some earlier time, that "looked OK" but really weren't?
The bike did very well on the trip, about 1400kms, a lot of it on dirt roads. When fitting the rear wheel the day before I left, I discovered that the outer bearing cup had spun - the hole was 0.3mm oversize. I used a strip of manilla envelope paper impregnated with epoxy to fix it (and reduced the preload). So far so good. I'll get the hub sleeved. Soon.
