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NOS EX300
10-07-2002, 07:07 PM
Can the 400 motor be o-ringed? (metal o-ring where the head gasket goes!) its done with high compresion HONDA car and turbo hondas

Please any helpl would be great
airheadedduner
10-07-2002, 11:22 PM
Contact MP racing. I know they machine R and shee heads to acept o-rings. I don't know about a thumper though.
YZROOSTINYA
10-08-2002, 04:28 AM
you will probally have a hard time time doing it since car and r-shee motors are water cooled and do not run as hot. the gaskets are rubber on dirtbikes,quads, not metal
10-08-2002, 05:50 AM
a 2-stroke o-ring head uses round o-rings. a 400ex would have to have specialy formed o-rings
stocktires
10-08-2002, 09:50 AM
Yea, its not a great idea
There's many reasons it hasnt been done and shouldnt be

blowin head gaskets NOS300?
airheadedduner
10-09-2002, 10:44 PM
Originally posted by S.M.A416
a 2-stroke o-ring head uses round o-rings. a 400ex would have to have specialy formed o-rings

I can see what you mean, even the R o-ring set-up takes like 7 o-rings(I think).

BTW is that sig directed at me??
stocktires
10-09-2002, 10:46 PM
I though only 2 o-rings were used on a R head?
airheadedduner
10-09-2002, 10:54 PM
Maybe I read wrong. I thought it said that it used 7 o-rings, less then most other kits. Thats for them to machine it for o-rings, not cool head. ?????? Must have read wrong I will look it up?????? I had to email them cause it don't say it anywhere, may be I am trippin or somethin. I don't know now.