Hmm, thats funny, maybe I dont have an 87.
the pro-x hub I ordered for my bike was for the 89's-04's and it would not fit. It was the exact same hub, only it had many small splines where it slides over the shaft. My shaft has 6 big splines on it. I reassembled with only 4 bolts, since one of my posts is broken off. I know this can't be good, but possibly I could make it work with stiffer springs. I can't find a hub anywhere.
After some tinkering with the clutch cable, I have got it to grab good in all gears, except 3rd. It shifts into third. but its just free revs. I dont think that my clutch is slipping otherwise why would it grab good in 4th? Also, not sure if it grabs in 5th, or the top of any gear. The motor was not even warmed and the plug wasn't cleared yet, it was bogging on 3/4 throttle and up. I was testing on my street and this allowed one blast down and back since I have some ornary neighbors that call the cops.
I'll get it out this week to go ride it for a while and see what happens. This is a pretty bad diagnosis since it wasn't even producing full power on my test.
any help is appreciated,
kyle