Well after having tried to tighten the primary chain a number of times (about 5), I finally came to the conclusion that something strange is happening! There are wear signs in the crankcase - down the bottom and on one of the studs that hold the alternator in place.
So in order to get a better look and measure the chain I needed to remove it.
The the stator and clutch need to come off at the same time to get access. I used metric sockets to unscrew both the alternator (rotor) and the clutch centre nut after having remved the pressure plate and clutch plates, I used my home made clutch blocker and my rattle gun to remove both - no issues.
With the chain completely loose, there was play in both the clutch basket and the rotor... not normal me things. Anyway when you remove the clutch hub the rollers that form the bearing between the hub and backet fall out - there are 20! A part from a little marking on the basket grooves there was nothing untoward. So clean everything up and reassemble.
The chain measured out to be 84 links with a length of 15.75" for half length therfore 31.5 total length, which gives a pitch of 3/8" which is exactly right so the chain has not stretched at all!
So in order to get a better look and measure the chain I needed to remove it.
The the stator and clutch need to come off at the same time to get access. I used metric sockets to unscrew both the alternator (rotor) and the clutch centre nut after having remved the pressure plate and clutch plates, I used my home made clutch blocker and my rattle gun to remove both - no issues.
With the chain completely loose, there was play in both the clutch basket and the rotor... not normal me things. Anyway when you remove the clutch hub the rollers that form the bearing between the hub and backet fall out - there are 20! A part from a little marking on the basket grooves there was nothing untoward. So clean everything up and reassemble.
