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So I've got the front end apart and decided to clean up the speedo drive. I washed it all out with solvent and then noticed that it is very very stiff to turn by hand. As in, I have to put it in a vise and turn it with pliers to get it to move.  This is especially weird because it seemed to be operating normally on the bike.  Is it just supposed to be that stiff?  I took it all apart as far as I could but I can't get the worm gear out because it seems to be held in with a roll pin installed in a blind hole.  I even tried to drill out the roll pin but it must be made of something very hard because my bits don't seem to be biting into it very well. Anyone encounter this before?

Hey everyone!

New to the forum.  I'm working on a new-to-me 77 RD400D.  I decided to do the Mike's XS Emulators and a set of Race Tech fork springs and I've been all up and down this forum, the Mike's XS instructions, and all the Race Tech literature and I've learned a ton but I'm still looking for one piece of information that doesn't seem to be clear:

The Race Tech emulators apparently come with "adapters" that go between the damping rod and the emulator.  It isn't clear to me what these adapters are accomplishing.  My best guess is that they are used simply to give clearance between the nut on the back side of the valve and the roll pin that runs through the center of the damping rod.  Is that correct?

I have already machined my damping rods to just below the upper holes and also machined a step into the top of the rod so that the emulator fits snugly.  I also cut out the center of the roll pin so there are no clearance issues with the nut.

As far as I can tell, I should just have to add the additional holes to the lower end of the rods and use the PVC tubing to add in the appropriate amount of preload and everything should work fine, correct?

Anything else I missed?

Thanks!