The website is still very crude and those prices are not accurate in any way on tires. I need my web guy to update things there alot as we set it up and Its just laying there at the moment untouched.

I have a question I have a brand new jp .21 worlds motor 2002 and I will be running 20% odonnel fuel.How much shim thickness should I have?I think it has around .5mm -.54mm in it right now.also how many different thickness shims are there? thank you very much.
mike wannett

Depends on where you get your engine from. If you get it from U.S through authorized dealer then it should come with 0.6mm headshim (shim for 20%).

I was told if you get it directly from Europe, then it comes with 0.4mm (for 16%).

I run mine at 0.7mm head shim just to be on the safe side.

Just FYI, it you dont haev enough head clearance then it will be over compressed and you will crack your piston or suck a plug in there!

It should have a the following in it
silver .010 shim in thousanths
copper .008 shim
copper .004 shim

remove the .004 as you are in the midwest I believe and you will generally run a #7 plug (80 degree median temp)

PS put the alumunium shim to the liner. it will be the last one to go on.

Stormperson YGPM

when will the updated prices on the tires be posted. are you not selling 30mm touring tires?

Thank you very much guys .I will break in the motor tomorrow.
mike

Dennis... or anyone
What do you think (in general) about a ceramic coating on the piston of these motors? I work in a shop that builds sprint car engines and we coat the pistons in house so I can do it for free. Also we have a coating that we use on lifters etc to reduce wear... I was thinking about coating the crank pin...

otto its all good there

Hi,
can anyone tell me whats the name of the red epoxy that is used in modified Engines crankshaft,,or what type of product is it....any help will be appreciated.

roar states that you are allowed to run ceramic bearings, and that is it. no other ceramic part are allowed in an engine.

I'd like to know also, please.

Hi Jim.
We tryed it in the past to use ceramic coating on sleeves and piston-didn't work as good as we have now ( AL on Chrome).
Cranck pin coating might defenetly work. What is hardness of that coating? What is size of microcracks ( there will be microcracks)? How thick is coating? ( in your shop)
Edward

I would only use ceramic on the piston crown, stay away from anything on the skirts and cylinder bore. Diamondlike (the great JP,RB secret)works well on the crankpin and wristpin though you will need to resize the bushings to compensate, and teflon benefits other areas.

I had very good luck with my hardchromed crankpins so far, thanks to Edwards advise..