Economy Issue

[robertall]

CG according to internet = 100mpg

My CG = 75~mpg.

Which is a bit annoying, but don't know why.

However, it is a lot louder and a lot faster than before. (When i mean a lot faster, i mean i can put it in 3rd gear and take off from a stop, it only has 4 gears to start with...)

And i ain't exactly racing it either, i am going through town in 3rd/4th most of the time, and i have not exceeded 50mph (due to engine rebuild).

Ive done 200miles on 12 litres of fuel.

Any idea why it is so bad?

It is amazing, because it sounds awesome too, i have not tested out the full power of it yet, but i accidently dumped clutch between 3rd and 4th yesterday and it popped up (i was only doing 30mph) (wheelie), not entirely sure if that is a good or a bad thing.

Rob

[thunderlad]

Never really bothered with what the factory/internet say about mpg.....you will soon suss it out for yourself.........keep a log of how much fuel you put in/mileage you do....

[robertall]

Originally Posted by thunderlad

Never really bothered with what the factory/internet say about mpg.....you will soon suss it out for yourself.........keep a log of how much fuel you put in/mileage you do....

Okay, i will do.

It did 100mpg+ before the rebuild though, and i drove it harder.

Rob

[AndyR]

Increased performance = Reduced MPG Rob, you can't have it both ways

[robertall]

Originally Posted by AndyR

Increased performance = Reduced MPG Rob, you can't have it both ways

Yeh i guess, but i read around about 100 reviews of the CG on the internet, and the worst "economy" i found was 90mpg.

Nobody posted a figure under that.

It misfires sometimes though, could that be something to do with it?

Rob

[AndyR]

You know when they rebuilt the engine Rob, did they also balance up the carb(s)?

If the mis-fire is a sort of "pop, pop" type then that's a fuel issue. If it's a "skipping a beat" miss, I'd suggest the most likely cause is electrical.

When does it miss? When it's cold? When it's hot? When it's ticking over or when it's running under load?

[robertall]

It misfires when i change gear after put on load in the previous gear, and it is a clear crisp "bang" noise.

Rob

[AndyR]

Originally Posted by robertall

It misfires when i change gear after put on load in the previous gear, and it is a clear crisp "bang" noise.

Rob

Sounds to me like it's over fueling, damping down the plug then the plug is drying and firing the vapor in the pot causing the miss when it's coming off the revs on the change up.

Get it back into the shop who did the rebuild, stand over them while they have a look, check the timing, (that could be ever so slightly out), and the carb balance to make sure that's all OK.

[hub]

over rich ---------- lower M.P.G.!!