strange tunes [N i dont mean hip hop]

[jamadi112233]

So been having some problems with tuning the bore kit. Ive been trying all sorts of different jets trying to get something to produce good results. I ve gotten it to run great on any jet between 92-100 with 100 coming out a little rich in the plug chops. Yet 100 was way too rich when i first threw it it. Now my plugs are only coming out half colored. Half of the plug is showing color while the other half stays clean is this something i should worry about?

[odinxxix]

i have the same deal running a close to 90 jet, ill watch this thread

[mr pibbs]

I understand this to be an exhaust air leak. One side of the mixture is leaner than the other. Thus the half and half. Check the washer in the exhaust and ensure that the exhaust is evenly bolted on.

bear would be able to clarify and correct

[jamadi112233]

do you think that a leak would also account for it running so well with a huge jet???/

[jamadi112233]

well i checked it. that is no leak. at all. lean side of the plug is facing the inlet

[mr pibbs]

well i checked it. that is no leak. at all. lean side of the plug is facing the inlet

didn't you spin it when taking it off the head?

[Wheelman-111]

Greetings:

I had the same 2-faced plug issue earlier with Flash III Stage 2. (Performance Tech ~2 months ago. Bear encountered the same thing with his Hi-Po Mercurys. (Mercuries??) Plug heat range, fuel mixture and oil ratio can make for some mighty confusing plug reads. In my case it was the sliver of a crack in the V8 exhaust gasket, which was letting just a breath of fresh air back in. White on the exhaust side, too much oil and dark everywhere else. IF the temps are good and the scooter runs fine, don't sweat it. Tune by the temps and by BVD Dyno.

[jamadi112233]

what temps should i be in. ?

[Wheelman-111]

Greetings:

300-ish depending upon gauges, which can vary by ~50 sometimes. Never exceed 400.