Hi all,
I was doing some carb diy cleaning and decided to try and tune my AF ratio, want it to be leaner as I think it's running rich (got those smelly exhaust, plus FC is not so good) so few questions, been trying to look in internet but can't find much helpful info:
1. The red circle is the AF screw, correct?
2. With AC off idle screw turned out until it doesn't touch the linkage, I tried to tune the AF ratio
3. When the screw is completely removed, the engine still runs -> is this running at fully rich?
4. When I screw in this AF screw, at one point the engine starts to hesitate and want to die off (is this getting too lean, i.e. not enough fuel?)
5. I backed out a bit and then engine RPM seems to be ok around 900 (AC off idle screw still not touching)
Few things I noticed, after a while when I start the engine, the RPM is low (maybe 600) and almost wanted to die off. Does this mean too lean and I need to screw it out?
Without any other changes, meaning as low rpm scenario above, after some driving, the idle RPM shoots up to 1300 or so... Is this normal?
Just trying to do some diy trial and error tuning

Also, does anyone know if I can remove that 'protective cap'? so difficult to turn it (I don't have old spark plug lying around) so had to use a pair of pliers - that's where you see all those 'teeth' marks there...
Any suggestions/advice from gurus here most appreciated, thanks.
This post has been edited by poolcarpet: Feb 19 2012, 12:00 AM