I really like where this just went, but, this is Halvors tuning thread.
Charon, I think what ytou were talking about is interesting enough to expound a bit, & the Hp/Hours thing,, Ive never seen that, another cool topic,
Would anyone want to fire up a new thread so we can follow these rabbit trai8ls a while?
I did not know Prime had a lower flow rate. But, 50 MPG at 75 MPH or 40 MPG at 60 MPH, 1.5 gallons/hour = 6 quarts in 60 minutes= 1 quart every 10 minutes.THats a cup every 2.5 minutes. Thats a trickle, not flow, so, if the bike is going lean, surely its not because the petcock isnt delivering.
IF its the cap vent, then it would show up quickly with a full tank, less so with a near empty one. I would ride to where I could run at speed, shut it off, pop the cap, put it back on & GO, hit top speed. If it goes lean, its not a delivery problem, unless the needle/seat/float stuff just arent playing fair.
Shut off bike & fuel & coast to a stop, measure what comes outta the bowl. Tho, I would expect it to coff & sputter like its outta gas more than just go lean if theres just not enough in the bowl.
How is it that a carb is jetted & provides a nice Air/Fuel mix at 40 & just cant keep the mix rich enough for 70 MPH? Air flow increases thru the venturi as the slide climbs outta the way, the needle lifts out of the way,,
& Dave said
30 x 0.5 = 15 gallons per hour.
& I said,, Wow,, Ill just hafta circle the gas pump..Thats 1.5 gallons every 6 minutes,,
Get to doin math & get yer head all full of numbers & mess up on the Units,, easy to do,,