I just swapped an 81 jet into my stock carb after shortening the hose to the length as specified by ronk. bike feels a bit weaker in the midrange but carried power much higher into the RPM and picked up mph overall. about a day after this it started to develop a random sputter/misfire but only after about 20 minutes of 35-45mph riding. usually in the 8400-8600rpm range getting up to 9600on some downhills and dragging down into the 7400 range on uphills.
is this the result of it getting hot? clogged jets? the new jet has only been in there about 2 weeks and has about 150 miles on it.
TVR intake shortened to just the 45* elbow as suggested by ronk
Polini Variator with 5.5g sliders
under 200 miles on a new bando belt.