Does this look to lean

[dave411]

Its a 198 Mugello,26mm Delly,GP 50 pipe.
Main 100
Atomizer AV266
Needle x7
Slide 45
Timing 23 static,Varitronic fitted.

[garry inglis]

how many miles on that plug it looks bran new or very lean

[dave411]

how many miles on that plug it looks bran new or very lean

Hi Gary,its done about 80 miles.


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[garry inglis]

ive just been in my shed to look at my book and ive got this main 118 /120 av266 2nd clip x7 pilot 50/55 slide 40 choke 70 i think you want try one change at a time and keep doing plug chops but better to be rich than lean

[dave411]

ive just been in my shed to look at my book and ive got this main 118 /120 av266 2nd clip x7 pilot 50/55 slide 40 choke 70 i think you want try one change at a time and keep doing plug chops but better to be rich than lean

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[dave411]

Thanks Gary.Will try a 120 main first.Will report back in a few days.
Thank you.


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[mick1]

Try putting an older plug in (oily....ish) and see if it changes colour.

If your running in are you marking throttle positions and doing plug chops at different throttle positions ? If your running-in you might not be coming onto the main jet and you could be lean elsewhere (pilot, needle, etc).

[dave411]

Try putting an older plug in (oily....ish) and see if it changes colour.

If your running in are you marking throttle positions and doing plug chops at different throttle positions ? If your running-in you might not be coming onto the main jet and you could be lean elsewhere (pilot, needle, etc).

Thanks Mick.Yes,I am running in,but have more oil in the mix.25:1.
It is stuttering mid range,but when it gets the revs up it flies.Havent done many plug chops to be honest,will just try a bigger main and see what happens.


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[mick1]

get some masking tape and mark your throttle 1/8. 1/4. 1/2. 3/4

Run about a mile holding at the position then cut the engine and check the plug.

This will help identify if your, pilot, needle (+ clip position), slide, atomizer and main jet are ok

[dave411]

get some masking tape and mark your throttle 1/8. 1/4. 1/2. 3/4

Run about a mile holding at the position then cut the engine and check the plug.

This will help identify if your, pilot, needle (+ clip position), slide, atomizer and main jet are ok

Ok,will give that a go.
Thank you.


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