Topic: CL 350 vintage racer project

[emlupi]

Good morning,
I have been posting on the Honda twins forum but the traffic over there is pretty thin. I’m building a vintage racer for use in a spec formula CB350 class. Engine mods are very limited but I am looking to build the engine so it will stand up to the rigors of track use.

It has been suggested to use a copper head gasket for this application. What is the group’s opinion of this and what sort of special instructions would I need to heed for this installation?

Also, Honda is no longer supplying OEM gaskets for these machines. I know there are many sources for aftermarket gasket kits, etc. Does anyone have suggestions for which suppliers have quality parts and, more importantly, which should be avoided?
 I appreciate any advice you can provide, thanks.

[CycleRanger]

The HT forum died when it got sold.

Head over to https://www.vintagehondatwins.com/
All the knowledgeable vets are there.

As far as gasket sets, OEM A&B sets can usually be found on ebay.

[emlupi]

Thanks CycleRanger,
Appreciate the help. I knew someone here would get me pointed in the right direction.

[newday777]

What year is your 350?
I might know someone in NH that has NOS gaskets for some of the old twins.

[emlupi]

It’s a 1973 CL350K5. That would be quite helpful, thanks.

[newday777]

It’s a 1973 CL350K5. That would be quite helpful, thanks.

Are you boring it bigger? You will need a bigger head gasket if so.
Where are you located??

[newday777]

Base gasket available
https://www.hondarestoration.com/photodetail.asp?hrPart=12191-312-000
He doesn't have the head gasket butCMS in Holland shows they have 1.
You could try David Silver Spares (warehouse in PA as well as England)