Back in October I had done some clutch work on Stella. All in all, a huge improvement. Adjustment of the shifter pawl solved my issue of slipping out of second. New friction plates got rid of a stutter on take-off. While I was in there I tightened the spring on the starter gear and can now enjoy using that little black button without all the racket.
All good stuff, but I knew I wasn't done in there. I hadn't smoothed the sharp edges of the steel plates. I didn't like using the stock spring screws without a sure torque value. And most bothersome of all was that even though the stock springs all measured more than ok by length, I was experiencing some slip. I should have listened to 5t's recommendation of replacing the stock springs.
So, with another 1000 miles on the odo and a periodic maintenance scheduled for the weekend, I decided it was time to go in again.
Here's the inner clutch hub as I checked to be sure my modded stock spacers (thanks Pete!) and 40mm screws weren't too long. Everything in the right half of this photo is stock, left half new. These are EBC CSK14's. Clearly stronger than the stockers. The 40mm screw on the left could use another mm or two, but the key is that they aren't too long.
One might think the socket head might be too tall as they are much taller than the stock JIS head, but there's plenty of room for them.
All's buttoned up now and ready for a test drive. There's definitely more force on the clutch lever; we'll see how that plays out in normal riding, can't say I'm thrilled about it in stop-and-go traffic.