KZ1K'S MOTOR

TerryK wrote:

kz1k wrote:

TerryK wrote:

My question is, where did all the rust come from? With that amount of rust, a valve job, cylinder hone and new rings is the absolute minimum you should be doing.

i dont know terry. if it was water cooled i would have a guess, but its not. and why was it only 1 cylinder? say it sat in the rain, all the cylinders would have surface rust.


i did a water test to check the valves


results on intake is 2-3 leak water.

on the exzaust its not leaking yet at all....ill give it a few more minutes.

so for sure on the intake 2-3 leak.

Use a solvent like Varsol. Water has too strong a surface tension and won't show leaks well.

Once you know which ones are leaking, disassemble the head and check each valve for obvious signs of being bent. If none are bent, lap the valves. It may be that's all it needs as far as the head goes. Lap ALL the valves, reassemble the whole thing and do the solvent test again.

One thing: do you see any signs of valve to piston contact? Inspect the pistons closely for tiny crescent shaped dimples.

thats why you blow compressed air around the valve/seat,if its not sealing it will bubble in the ports

so much for waiting for my buddy.

do i need to take the pistons out?

also i found a round like hard rubber ring the size of piston near the face where the bottom gasket is.

you can see #3 is scratched up......this motor may have never been rebuit....if it had...it needs it again.

......

.........

i see you found a loose sleeve!

.....3rd chamber.

Does your Dad have a cylinder hone, and if so you need to find out the grit or the balls/ or stones.

shitty buzz man that's pretty gross. BTW, the flex hone works great, and they are not expensive. I would mail you mine so you don't have to buy one, but the shipping from canada would likely cost close to buying one of your own lol. That surface rust looks pretty serious, if you take some WD40 and rub the rust off can you feel pitting underneath?

Regarding that loose sleeve, what do you experts suggest he do? is there a way to put it back in and have it stay in place? OR should he just get a new set of sleeves to eliminate the rust? Sorry for being a backseat driver lol

time for a 1075 kit! :woohoo:

requiem has that kz1000 motor from a running bike in classified section,$500.00 obo
might be a major money saver for you versus building yours right now

Motor Head wrote:

Are there any willing members that can go over and help out with this motor work?
He is trying hard but needs some guidance, it can be a bit daunting loosing your KZ virginity!

Here is another video for one of your next steps, honing the cylinders.

AND Another.

:ohmy: I don't use that much lapping compound in 3 years time.

These DIY videos should be taken with a grain of salt.

PLUMMEN wrote:

requiem has that kz1000 motor from a running bike in classified section,$500.00 obo
might be a major money saver for you versus building yours right now

Jump on it!