Thanks for the nice positive comments
I don't mean to whinge guys, it's just that I feel I'm stuck on this tank/seat support. Crazy really, after all the other bits I've sorted with minimal worries.
What I try to do is be clever & make a part that's capable of another job also. So I'm attempting to add structural rigidity to the rear of the frame as well as a seat/tank mount. At the same time trying to make it look minimal, tidy & professional also. What a faf.
Since I'm whinging, another issue that I have is that I'm not keen on how high the tail is. I do feel it's fashionable now, but I would of preferred a lower seat tbh, like in some of the early pictures. I've been forced to do it because of the exhaust & feel I've had to follow the lines of the frame also, but still it niggles me. I feel I can get away with it on the exhaust side but it might be an ugly issue on the carb side.
Another thing I want to do is to replicate the exhaust hanger plate on the rear subframe. So there's one either side, then weld a piece of rectangular box around the plates to make a tidy strong web effort. Then I could if required mount some conventional exhausts on, or mount a number board on it.
I've also been reading about these Weber carbs, I think it's going to be a compromise tbh. The whole jetting theory is based on what the engine is capable of reving to & the cc of the cylinder.
So ideally, for a 500cc cylinder capable of reving to 9000+rpm the choke required is a 50ish mm item. That's big & it'll require a really expensive Weber 55dco or bigger. What I've also read is that the draw back of doing this is that the lower rev range will suffer due to the venturi struggling to atomise the fuel at low engine speeds. The weber 45 I currently have has 40mm chokes in it & I'll jet it safely to suit, but it'll only be jetted correctly for 6500rpm. A dyno run will be interesting to see what's what.
I was going to stretch & get a 50dcoe, but the largest choke I can find for them is only a 44mm item. This would only improve the issue a little, say up to 7500rph. I would imagine the 45 will be ok for now tbh.
Hopefully nice clean low speed around town carburation that'll accelerate hard all the way up to 6500rpm.
Just a thought, I've seen FCR set ups for sale on jauce & they are only 42mm iirc, anyone know if they run out of puff at a certain rev range?
Sorry for banging on, & thanks again for the helpful comments
