DragBikeMike
Serious Thumper
   
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SuzukiSavage.com Rocks!
Posts: 4470
Honolulu
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"8. Opened it back up again, and noticed the spring bolts all had worn heads... the shorter rod was causing the entire pack to move forward in the basket when the clutch is fully engaged because the shorter rod compresses the clutch more than the middle or longer rod.....that's when I realized the rod length effects the compression of the springs when the clutch is fully engaged, and therefore the longer rod actually has the pack less compressed than the shorter ones, and because of this it has to be pushing the arm outside the case DOWN, with the longer one pushing it the furthest down of the three."
The shorter pushrod does not "cause" the clutch to move "forward" in the basket, the shorter pushrod "allows" the release plate and pressure disk to move farther right and squeeze the plates.
The shorter rod does not "compress" the clutch more than the middle or longer rods, it "allows" the springs to move the release plate and pressure disk farther to the right and squeeze the plates.
As your clutch wears, the pressure disk and release plate move to the right, toward the release cam. The release cam has a hard stop that is built into the clutch cover. As wear continues, all of the clearance between the pushrod and the release cam gets used up, until the mechanism is hard up. At that point, the release mechanism begins to prevent the release plate from moving any farther to the right, and the pressure exerted by the springs can no longer pinch the plates together.
So, the logical solution is to install a shorter pushrod. That lets the release plate and pressure disk move a little farther to the right so that it can pinch the plates together. But......as the release plate keeps moving to the right, the bolts are getting closer to the release shaft. You can keep putting in shorter pushrods to account for the wear, but the bolts will eventually hit something. In your case, the shorter pushrod combined with the excessive wear on the pressure disk cause the release plate to move so far to the right that the bolts started to hit.
It's a double whammy. As the clutch wears, the release plate and pressure disk move right. As the release plate and pressure disk move right, the installed height of the springs gets larger, and spring preload goes down. So, you are losing friction due to the wear, and you are also losing spring preload.
Checking for free play at the hand lever is good. As I recall, it should be about 1/8". Checking for free play at the release lever on the clutch cover is also a good thing, but it is deceptive. Don't fall into a trap. Just because you see free play on the release lever on the clutch cover, doesn't mean that there is free play in the release mechanism inside (cam/pushrod/release plate). The release cam and release shaft are not a tight fit. There is lost motion. The shaft rotates within the cam, and over time that rotation within the cam gets worse. You can hold the release cam hard on the stop in the clutch cover and the lever arm and shaft will still rotate a bit. That can fool you into thinking that there is free play between the pushrod and the cam, when in fact the release assembly is up hard and preventing the pressure disk from squeezing the plates together.
I recorded a vid and uploaded to YouTube but there is some sort of glitch. It's hung up in "processing", something to do with converting from SD to HD. If it ever gets uploaded, I will post the link.
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