head gasket headache

[3Wheelermaniac3]

I have a 250r that has a pro design cool head and has been bored to a 276. I blew the head gasket and have no clue where to get a new one. Does pro design make one? Does my bore affect if I can use a stock gasket? And how can I tell what dome is in the head now?

[3Wheelermaniac3]

Any comments

[buzzy613]

if you bought a pro design cool head why are you using a head gasket?, the cool heads are o-ringed

[3Wheelermaniac3]

Idk it came with the head on it and a head gasket.

[Lboya]

Give Pro Design a call and see what they can do for you...

Pro Design
11611 Salinaz Street
Garden Grove, CA., 92843
Phone 714-534-0620

[LastFoolerInVA]

please let me know what they say also... My cool head is hanging up in the shed right now... the head gaskets kept leaking... changed it twice... I just thought it was a bad head ( I got it used) fried my piston rings...

[3Wheelermaniac3]

Well I called but no answer. Ill keep calling for now. I'm headed to the Honda place now to see what they say. Ill get back with y'all when I find something out. More input from you guys would be appreciated till we figure this out. Thanks guys.

[bkm]

I had an older cool head that used a flat metal oem style gasket. Does your head have grooves cut in it for o-rings or is it flat like a stock head?

[badass350x]

Lets see a pic of what your dealing with??

[3Wheelermaniac3]

Its flat no grooves. Honda place couldn't help. Pro design website isn't working and they don't answer the phone.

[3Wheelermaniac3]

Ill get a pic later when I get home.

[tecat-z]

If ya can't find a replacement. Call Cometic. Tell them your bore size and thay'll make ya one in no time. Just be sure both surfaces are flat, run a thread chaser on your studs, and use oil on the threads before you turque things down. Interference between nut/stud thread doesn't allow for proper clamping. If your at 2mm over, a oem gasket should not impede into bore area.

[3Wheelermaniac3]

The gasket I took off it is 69mm and stock cylinder bore is 66.02-66.04. That means I need a gasket that is 3mm larger on the bore right.

[3Wheelermaniac3]

Called pro design and they said use a stock head gasket. Problem solved bit I'm calling cometic to get one matched to my cylinder. Thanks guys.

[LastFoolerInVA]

on ebay I noticed a kit that comes with a re-usable copper head gasket... I'm gonna try that... glad you cleared this up!!! thanks