I got version 3 of my pipe up and running.
I mentioned that the pipe had a narrower powerband. I spent some time working on tuning it. At first I thought that I had jetting issues and went up and down with the my range of jetting. I am back up at my Mikuni 100 jet for now. Nothing I did with the jetting would let it run on the pipe.
I went ahead and drilled my stock weights down to 5.5 grams from 6.5 grams. I am only running three of them. My contra spring is stock. I put in some heavier clutch springs.
It is far from acceptable but I can get the engine on the pipe at about 25 mph and it pulls pretty hard, I have had it to 45. There is some strangeness in the jetting that gets better as the speed builds.
My big head pipe and matched exhaust port I think is the the reason that my low end is weaker. It does feel like the pipe comes on harder than the old one did.
Here are some photos of my work today.
It is tacked up not finished final length is still open. I haven't welded the expansion chamber to the head pipe, it is a slip fit for now.
I am now thinking of a heavier contra spring.
I am now thinking of a heavier contra spring.
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