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New OEM cylinder-Yellow coating?

Posted: August 5th, 2011, 3:30 am
by 23champ
I just bought a new OEM cylinder. Anyone know what to use to get the yellow coating out of the cylinder? Its been ported, and has the rear transfers epoxied. Dont want to use a harsh chemical that might compromise the structure of the epoxy.

Posted: August 5th, 2011, 3:45 am
by mr500
Mate,I'd be starting to suspect it's not a NEW cylinder. :idea:

Posted: August 5th, 2011, 4:51 am
by Tharrell
mr500 wrote:Mate,I'd be starting to suspect it's not a NEW cylinder.
Yeah, a little more explanation and some pictures would help. :shock:

Posted: August 5th, 2011, 5:17 am
by fastkart
The coating is called cosmoline. Take it off with brake cleaner.

Posted: August 5th, 2011, 6:09 am
by Roostius_Maximus
its definately new with that coating, brake kleen / solvent / gas, whatever is closest.

Check the BORE!!
The last few new ones i've recieved havent been useable at standard :roll:
The most recent one was .001 tight 1"from the top, .002" loose close to the transfers and .003" tight for the bottom 1.5"
I had to bore it oversize.

Posted: August 5th, 2011, 8:06 am
by 23champ
I guess I should have clarified it a little more. "I" HAD IT PORTED. :idea:



The fact that the bore's have not been straight is very reassuring, since I have to have this motor ready to roll buy Wed. , and have already ordered the top end. Yay!! :(

Posted: August 6th, 2011, 11:47 pm
by 100hp honda
honda jugs are good. .00o35 with wiseco

Posted: August 7th, 2011, 9:24 am
by Roostius_Maximus
100hp honda wrote:honda jugs are good. .00o35 with wiseco
wtf kinda jib-jab you talkin?

Posted: August 7th, 2011, 1:42 pm
by 100hp honda
had to much beers :lol: