21-02-12, 04:04 PM
As said, 45-55MPG. You get better MPG lying flat on the tank even at 60MPH but you get some strange looks :o .
Problem is that its a sportsbike engine with a 12:1 compression ratio. In order to avoid pre-ignition (pinking and dieseling) it has to be run very rich.
That means there's not enough air in the charge to burn all the fuel so it throws a lot of fuel unburnt down the exhaust pipe.
If you gould get purple avgas (130 Octane and full of lead) and rejet the carbs accordingly then you could get 90MPG out of it - but you can't. :'(
Now a honda 90 : that burns ALL its fuel: Half the third-world* can't be wrong , so get one!.
* In reality, the third-world all seem to drive round in Hyundai i20s these days, and that's the production operators. The engineers in Penang, where I used to work. all drive round in BMW320s.
Operators used to push-bike, engineers/managers had mopeds.
Problem is that its a sportsbike engine with a 12:1 compression ratio. In order to avoid pre-ignition (pinking and dieseling) it has to be run very rich.
That means there's not enough air in the charge to burn all the fuel so it throws a lot of fuel unburnt down the exhaust pipe.
If you gould get purple avgas (130 Octane and full of lead) and rejet the carbs accordingly then you could get 90MPG out of it - but you can't. :'(
Now a honda 90 : that burns ALL its fuel: Half the third-world* can't be wrong , so get one!.
* In reality, the third-world all seem to drive round in Hyundai i20s these days, and that's the production operators. The engineers in Penang, where I used to work. all drive round in BMW320s.
Operators used to push-bike, engineers/managers had mopeds.