Kicking around the idea of a Big overbore SOHC 450

[gregd1275]

Thanks for such an awesome thread.

I stumbled across this when doing some research for a potential cb360 project.

One thought led to another and I'm wondering if there's enough meat in the barrel casting to accept liners from something like a cmx450 or the cb450n engine.

Is there anywhere that I could get drawings of the various head bolt patterns or would I have to buy head gaskets and work from there?

 

[ancientdad]

Thanks for such an awesome thread.

I stumbled across this when doing some research for a potential cb360 project.

One thought led to another and I'm wondering if there's enough meat in the barrel casting to accept liners from something like a cmx450 or the cb450n engine.

Is there anywhere that I could get drawings of the various head bolt patterns or would I have to buy head gaskets and work from there?

This thread is about a completely different model than yours so none of it would be relevant to the 360.

We have a member here who has done many big overbore 360 engine builds. Start a new thread in Projects and Builds for your work and mention VHT member crazypj, he'll have plenty of suggestions and thoughts.

 

[gregd1275]

This thread is about a completely different model than yours so none of it would be relevant to the 360.

We have a member here who has done many big overbore 360 engine builds. Start a new thread in Projects and Builds for your work and mention VHT member crazypj, he'll have plenty of suggestions and thoughts.

Thank you.

 

[CB450DX]

Fascinating notes. I'll be keeping an eye for a ZX7 rod.

Around here in Brazil, there was at a point, 565cc racing kits for these bikes. What did these kits have in them? I don't know, looked everywhere but never found the ingredients for those cookies.
I did see at least 2 owners use CB300R (dohc air cooled) pistons which are ~79mm. If I recall correctly, it got the 450 close to 500ccs.

Those modifications were usualy done to the sport-ier CBR450 SR. Some CB owners also used the camshaft from the CBR, which had more torque further on the RPMs (maximum was around 8.5krpms).

 

[ericfreeman]

Might be apples and oranges but I took my GB500 from 498cc to 601cc and it was really worth it! Bike went from a nice little runner to a freight train and a blast to ride. Best of luck with your project.