'78 KZ1000 makeover

OK guys, I picked up a Z1 crank and rotor off of ebay.

Whats the concensus on tranny bearing replacement? Is there a reliable way to check my bearings for wear, or should I just replace them since they have 80K+ miles on them? If everything is ok with my tranny and my crank shows up in decent condition, then it'll be time to do a final cleaning of my cases (gotta make sure there is no media blasting residue left anywhere) and assemble the bottom end. I spent some time today smoothing a few welds, and going over a few more with the tig torch. My argon tank is down to about 100 psi, so a refill is due. I'm pretty sure I have a small leak in my regulator, as I seem to loose argon if I don't shut off the tank valve :blink: I'm happy that I have a welder that works, and I'm glad the company works to correct any issues I have, but damn! I'm getting a little tired of getting things fixed/replaced. Onward.....I need to finish the rear motor mount gussets that I had to modify, and I want to make some reinforcing panels for the top and bottom shock mounts....you know, some lateral shear strength never hurt anyone After that, I'll disassemble the roller, strip the frame and paint it. One thing at a time though, finish the frame welding

adam ever since i had to replace a broken output shaft bearing,i think i would replace at least the output shaft bearing and as many of the others as i could afford.the bearing on the back of the basket is a double roller and probably last forever in a street bike.the other two are not stressed as much so probably don't wear to bad.i guess you can go with dollars or luck which one do you feel best about .



:blush:




leon

531blackbanshee wrote:

adam ever since i had to replace a broken output shaft bearing,i think i would replace at least the output shaft bearing and as many of the others as i could afford.the bearing on the back of the basket is a double roller and probably last forever in a street bike.the other two are not stressed as much so probably don't wear to bad.i guess you can go with dollars or luck which one do you feel best about .
leon

X2 id replace the output shaft bearing for sure. after 80,000 i would suspect them all.

I only replaced my secondary shaft bearings on the 650, but she had under 30,000km, nowhere near your kind of mileage.

I'll replace the damn bearings guys. Hopefully the outboard bearing support will take some stress off the output shaft bearing. The bottom line is I can't risk jeopardizing my lower assembly for $140 in bearings when my bearings are already pushing retirement age.

531blackbanshee wrote:

the same thing that's wrong with wire wheels,duh :huh: !

leon

ooooooooooooooooouch! :blink: :woohoo:

:laugh: wireman,right where ya live huh?
i know,call me weak,i couldn't help it,you just left it layin out there,someone had to pick it up and run it in :woohoo: .

we knew you would come around adam, :lol: .
you won't regret it and after you are riding it will seem cheap,you know after you forgot about the money you spent and all .

leon

update, update, update!!!!!

Awww hell, I've got nothin' substantial. I have done a little cleanup on my frame welds, but I need to pick up some more primer and spay the areas I have completed to keep myself from going back to the same spot. But, if I must, I did get this crammed in my mailbox last week:



While I still need to donate $140 to my aging tranny, a battery is my next purchase to that I cam make the box and more importantly, the mounts in the subframe. That way I can finish up any welding and get it painted.

Does the $140 get you all new transmission bearings? I'll probably replace mine when I tear into my engine to do the 1075.

Yeah Josh, there are 2 main bearings, the big double roller at the clutch basket ($80 for the heavy duty unit) and the output shaft main bearing ($30) priced from A.P.E. The little needle bearings are $10 from places like

I suppose if I realy wanted to, I could spend another $80 on the bushings for the little needle bearings. Do those things ever wear out?

That answered my next question. Looks like I'll be splitting my cases again when I do my upgrade. I want to get my clutch basket balanced. Might as well have another close look at those bearings while I'm in there.