Big Bore 338cc / 350 cc kits - head gaskets?

wombat200 · Post by **wombat200** » Wed Aug 25, 2010 7:26 am

Those of you that are running the 338/350cc kits in these bikes - what are you using for head gaskets? I'm not that keen on copper.....

Rob.

ColC · Post by **ColC** » Wed Aug 25, 2010 7:47 am

Hi Wombat
My 350 has original style head gasket (but for a 64mm bore) a fella in our club had about 20 made years ago by a gasket manufacturer in Sydney. I also have copper, works fine and a lot cheaper

teazer · Post by **teazer** » Wed Aug 25, 2010 8:53 am

I had Bert Kingston in QLD modify a batch of stock gaskets to suit the larger bore. Next time I'll get copper from Cometic or Les Barker.

cknight · Post by **cknight** » Wed Aug 25, 2010 9:27 am

Cometic has CB77 composite gaskets with the proper fire ring fitted, that will accomodate up to a 65mm bore. These are available on special order as part number H0157SP5043F. Regards, Chase

wombat200 · Post by **wombat200** » Wed Aug 25, 2010 8:03 pm

Thanks guys - I've flicked off an email to Cometic right now.

leonvjames · Post by **leonvjames** » Sat Aug 28, 2010 4:25 am

I made a head gasket for my CB77, bored to 350 out of a piece of aluminium. Used an old gasket as a pattern, softened the aluminum in the oven and haven't had a problem for the last 10 to 15 years. Cheap too.
Leon, long time owner and rider.