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[sorry for all the questions lately, have pulled the head and piston out and I'm unsure what is normal wear what is bad/danged etc so I will post some photos and any thoughts is welcome or even some tips on what to check my self

What is that on your leg?!

Is it plated or sleeved? It looks pretty rough from the pictures. If you can get some light in through a side port, intake, exhaust, etc., while taking a pic from above, that might give it some better clarity.

By the way, that is the cylinder. Post some pictures of the head, too.

Haha got attack by some grease and oil my bad I thought I did I'm unsure if it's been touched before I'll take some better one with light

Some more photos should be a bit better

Has it been cleaned inside?

The intake track and head look good to me in the pictures.

It looks to be on the stock Electrofusion coating. If so, DO NOT hone or bore it!!

Is there any chipping or flaking in the cylinder coating?

Can you catch a fingernail as you move your fingernail along the surface?

Are there any grooves at all?

Hey I gave it a light clean, and my nails slide down it with out feeling and bumps or grooves and there doesn't seem to be any chipping or flaking,, just need to measure with some a bit better than my vernier, any tips on removes the kips I can't seem to get it out I've followed the manuel but the two valve/gears won't come up higher enough

If you can, take it to a machine shop. Measuring a 33 year old cylinder for out of round / egg shape / oblong, etc. could be important. Slapping a new piston in there may or may not work real well.

They may be caked up with carbon and oil. Try to clean them some. One picks them up a little, then the rod slides out the side after taking the side screw and plate out.

Will do there should be a few places locally I can take to, yeah I heard they can gunk up I've tried cleaning them I might get the pliers and try a little force

Have you got some oven cleaner?

DON'T let it get on the aluminum.

Don't let it set for long, rinse it off, evaluate and try again.

It is POSSIBLE that I may have damaged some aluminum back when I was younger and even dumber.

I heard over cleaner works good and is a no no for aluminum haha will have to buy some tomorrow and report back

Even still I can't get it out something isn't right

Don't ask how but got the rod out but wow there must be oodles or carbon on the exhaust valve because they will not come out so tomorrow its chemical time and try my luck

HOW'D YOU GET THE ROD OUT?

KDXGarage wrote: ↑11:59 am Apr 12 2020 HOW'D YOU GET THE ROD OUT?

May have wedge the valve up from the inside slightly,, is it safe to clean the whole cylinder/head with oven cleaner?

I've cleaned it twice with oven cleaner inside and out re lubed etc etc these valves won't come out geez haha in the manuel they should just pull out what am I doing wrong

Holy moly 3 times cleaned a bent screw driver, and all my strength and they came out there now way they there were working before,

KDXGarage wrote: ↑11:59 am Apr 12 2020 HOW'D YOU GET THE ROD OUT?

Hey kdx do you know if 87 has same cylinder/head clearances etc are same as 86, as I only have the 86 manuel

I believe those are the same part number, so it should be fine. Have you tried using heat?

kdxsully wrote: ↑07:54 pm Apr 13 2020 I believe those are the same part number, so it should be fine. Have you tried using heat?

Thanks for the reply I'm taking it to the shop to get checked then will purchase the kit, I haven't yet but I'm thinking I might get them to clean it while it there