MPG?

[Biker_Bob]

What sort of MPG are you getting from your 3HE?
I'm not getting the sort of range I was expecting from it, it seems a lot more thirsty than my 4JH.
Mind, I have been doing quite a bit of high speed test riding recently (100+ for extended periods), I guess the economy drops off somewhat in that case?

[DonTZ125]

I have been doing quite a bit of high speed test riding recently (100+ for extended periods), I guess the economy drops off somewhat in that case?

Yes ... The faster the bike goes, the faster the gas goes. Bear in mind too that drag goes up with the square of your speed - double the speed, you face 4x the drag and need 4x the fuel to overcome it (assuming other factors don't also chime in).

[Biker_Bob]

Thanks, yep I get all of that - but I'm after a real world figure for what it should be.
My 4JH seems significantly better on fuel, just wondering if this was normal?

[pefrey]

A lot will depend on your gearing. Are you running 15/45 or something else?

[pefrey]

It will also depend on jetting. If your carbs are set up rich, or you have a Stage 3 kit, state of tune etc.

[Harrysf707]

43 MPG average here, 75-80 MPH backroads/highways very little city. But, my jets are running retardedly rich...

[fink]

Stock 45-55. Stage 1 w/ header 38-45.

[pefrey]

Stock 45-55. Stage 1 w/ header 38-45.

This seems about right to me. I was getting about 50-55 on my stock bike, then added a Stage 1 and 47 tooth rear sprocket and dropped to 35-45 range.

[pefrey]

When I say dropped from 50-55 down to 35-45, there's also a transfer from street to track. So, I was getting 50-55 on the street (very tame riding, shift around 5 or 6 and cruise around 3-4K) to 35-45 with Stage 1 and sprocket change on the track (keeping revs above 7K).