How well do Bullets fitted with these perform?
A.
In my opinion regarding the UCAL carb only, and having actually done it, the performance is about the same in outright terms. Maybe a little freer at the top end...it certainly seems to pull harder up around 80mph, but without a dyno run, it's just feel.
In terms of general running, it's much better. Smoother, with a more gentle on/off throttle transition, zero glitches. And it runs cooler.
Fuel consumption is worse of course....I measured 75mpg on the first thankful. UK gallon that is, down from 85 with the FuelX Lite box add-on I fitted to the FI.
That's indirectly the objective; to get the mixture to a sensible non-emissions based number.
Attached is a before/after picture of the parts involved. You can't see the difference in weight between the two wiring looms, but it's significant.
I could also have included the ABS parts, EVAP and PAV parts!