Sure..
first: remove the nut and washer from the driven unit and take it off the jackshaft.
Now get snapring pliers and remove the snapring you see.
(carefull the spring is pushing the cam towards you, so be sure to hold it in place)
Now put it aside lift the cam off the pulley
(it's going to get turned by the spring so again.. firm grip
Now check the spring, if it's not a perfect coil but bulged or deformed.. it must be replaced
(the one you want is the green series 30 spring as the buttons available here:
http://www.gokartsupply.com/asymapp.htm)
Inspect your buttons, any loose, cracked or worn down button should be replaced
(they do come in packs of three) if in doubt swap it out.
they should sit in there really tight. so a set of pliers will help you pulling them out.
if you break the leg, just push it through .. but be sure to get rid off that nasty little leg
Pushing the new ones in can be hard as well.. a rubber mallet will help though.
While you're here.. you can clean and maintain the rest of the driven unit as well.. you'll never get a better opportunity to properly clean the sheaves
fine grid scratch pad to remove all dirt grime and rust..
but as long as it's not pitted or really rusty there is no urgent need,
but the cleaner and smoother the sheaves are the better for performance and beltlife.
Now you have the new spring and installed the new buttons...
seat the new spring onto the shaft and into the hole in the sheave.
Put your cam back on and thread the other end in one of the three holes.
(hole one if you need the TC to stay in low gear a little longer [more torque],
hole three if you want it to shift up a little earlier [slightly quicker].
hole two for the average behaviour and OEM setting ..[this is what you want 99% of the time])
Hold your snapring pliers and the snapring handy!
push the cam down just so it hovers over the buttons.
Now grab the outer sheave and turn it clockwise (the spring should tighten against the shaft)
just so the cam moves past one set of buttons into the next valley.
you can -if that's more convenient- also hold the sheave in place and turn the cam counter clockwise of course.. same thing!
push it down completely and while holding it down with one hand reinstall the snapring from step two.
carefully let go of the cam (in case the snapring isn't seated properly)
and if it's not jumping to your face you're done
See?! wasn't all that bad was it?
'sid
