It lives
Finally after basically 16 years of not being on the road my beloved Bevel has hit the bitumen. Still not painted, but not to far off now. It has all the usual suspects in the go faster game. Straight cut primaries, ally clutch basket and drum, omega pistons, big valves with wasted stems, Carrillo rods, Yass Yass yada. I also had a play with the ports using the same theory as I used on the 250 single. Which I might add is giving me no end of problems with fueling.
Thankfully a Dellorto PHM has quite a large number of variables, not unlike injection mapping. So armed with good intention and determination I shot off down the road to the magical whine of straight cut primaries. The fueling was shit, but by attempt 4 I’ve pretty much nailed it, one more jet change to do. Now here’s the cool bit. A 40mm Dellorto on a 900ss runs around a 150 main jet, i’m down to 120. For comparison, a cbr 250 runs 105-112 mains. Which means there is a shit load increase in suckuum, better cylinder filling which means more torque, and it feels like it. I’ve got that push back in the seat thing going on and it doesn’t take long to get to 140kmph (still running it in, restricted to 5k for a bit). So i’m Pretty happy about that. I imagine it will run out of puff about 7.5k due to airspeed over the valve, but that’s a wait until it’s run in thing, and over 8k on a Bevel is wait for the bang time anyway.
The down side to the whole thing is suspension. My god, I’d forgotten how much suspension they don’t have. Fantastic on smooth corners like on rails, hell on earth on standard country roads. Now investigating valving. Yes Brad I have read the ms forum. Luckily i know Glyn personally through a mutual mate. Might have a good chat before doing anything. I believe he’s not in with Steve at the moment although he is in NZ this week, so should get a fairly unbiased opinion.
Griff
To infinity and.......