2 stroke mix

[Noggin]

hi all, wondering if the 2 stroke oil mix on my NSR 125 RR is too strong with the petrol.

If there is too much, what can it do, and how can I adjust it?


Craig G(Noggin)
____________________
Current bike: kawasaki zx12r 2002
Track bike: yamaha r6 1998
Old Bike: honda NSR 125 1998

[Irdawood the 2nd]

There is a screw on the carb which if you turn will make the mixture richer or more lean.

[Noggin]

Thankyou

So is it all just trial and error to adjust the mix?

Cheers


Craig G(Noggin)
____________________
Current bike: kawasaki zx12r 2002
Track bike: yamaha r6 1998
Old Bike: honda NSR 125 1998

[Irdawood the 2nd]

You shouldnt need to touch it at all, whats up with the bike? why do you feel that you need to change the mixture?

[Noggin]

Just an idea to see if can get a cleaner burn, so don't have to clean spark plug so often!


Craig G(Noggin)
____________________
Current bike: kawasaki zx12r 2002
Track bike: yamaha r6 1998
Old Bike: honda NSR 125 1998

[Jammy-G]

Im thinking I need to weaken the mixture..

Lots and lots and lots of white smoke and fouling spark plugs, and the fact it's dieing after about 200 yards.

In fact I might as well just clean out the carb I bet thats whats casuing my probs.

I went on a NSR last night, a lot different to what im used to.

James.

[Noggin]

Now I want to find out how to clean the carb now that you've said that.

What do you ride then Jammy?


Craig G(Noggin)
____________________
Current bike: kawasaki zx12r 2002
Track bike: yamaha r6 1998
Old Bike: honda NSR 125 1998

[Hex]

[Noggin]

Phew, thanks, someone saved my bike, cheers Hex!!



Craig G(Noggin)
____________________
Current bike: kawasaki zx12r 2002
Track bike: yamaha r6 1998
Old Bike: honda NSR 125 1998

[Jammy-G]

I ride a Yamaha RXS100. Cheap and cheerful, nothing sporty or expensive.

Bought to give me some experience on the road and a bit of fun through the summer, until I move onot a bigger bike when I have more road knowledge.

Plus I can't really afford anything more at the moment.

About the mixture - my haynes said that adjustments on the carb shouldn't be made unless you know what your doing, or if it's done by a dealer.

And I will clean out my carb with clean petrol, best cleaning solution there is !

[ProXimaCore]

According to the Honda NSR manual it's 2 and a half turns from closed. So screw it all the way in first. (not tight) then turn it anticlockwise 2 and a half times.
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Honda NSR125R -> Suzuki GSXR400R GK76a -> Kawasaki ZX636 B1H -> Honda CBR400RR NC29 -> Nothing

[Keith]

cant you just put a smaller main jet in there?
thats probably the best way to sort out a rich bike..
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Aprilia RSV Mille R Edwards Replica - Aprilia RS250 - Suzuki GSXR600 Supersport Race Bike

[Kickstart]

Hi

The main jet only really affects the mixture after about 3/4 throttle. Basically the needle controls it from about 1/4 to 3/4 and the idle screw (and the shape of the cut out on the bottom of the carb slide) the mixture under 1/4 throttle.

None of those will have any effect on the amount of oil being pumped in. That is controlled by adjusting the cable going to the oil pump, which lives under a cover on the side of the engine.

All the best

Keith
____________________
Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[Noggin]

Cheers all, now I just need a manual, any going spare?

Cheers


Craig G(Noggin)
____________________
Current bike: kawasaki zx12r 2002
Track bike: yamaha r6 1998
Old Bike: honda NSR 125 1998