steve baker
Moderator
Don't run the engine to so rich! More power is generated from proper air fuel ratio anyhow..................That's what I had gleaned from skimming the internet. Plug can be prone to fouling if the engine is set up rich.
Don't run the engine to so rich! More power is generated from proper air fuel ratio anyhow..................That's what I had gleaned from skimming the internet. Plug can be prone to fouling if the engine is set up rich.
I'll be interested to see if there is any coil degradation after a period of time.
Hi Steve - We have been running based on your suggestions for Blue Slide in the Carb tuning sticky (needle 2nd from top - float around .880 - maybe a smidge higher). The plug looks great (white part is still white) and the lambda we get on the O2 sensor are right on the money with what you suggested. I am planning on keeping these settings and maybe leaning out a touch (based on lambda) as the weather gets hotter and more humid here. I think we should be all set for the new plug. Thanks for all the great tips!Don't run the engine to so rich! More power is generated from proper air fuel ratio anyhow..................
Steve,
Good to hear. I know when the AR3910X first got popular with the clone, many people tried them in their KT100 engines and experienced either coil or TCI failure.
Keep in mind, some Yamaha engines have same coils after 20 plus years, so that could have been a factor.
I know we sell over 200 Blue PVL coils a year compared to the 10 or so Green coils. I always wondered how many were for replacement vs. conversion.
Mike
We have the same carb as non restricted slides. Sure I do what I can to get the proper carberuetion on the top end and bottom end. But green slide is inherently rich.Don't run the engine to so rich! More power is generated from proper air fuel ratio anyhow..................
Why do you feel the slide causes your rich condition?We have the same carb as non restricted slides. Sure I do what I can to get the proper carberuetion on the top end and bottom end. But green slide is inherently rich.
I have run 3910X in my modified predators for years. Never had one foul. NEVER.After doing some research on this site and others it seems that the prevailing theory with the 3910x is you replace it before qualifying and the finals for national events. Once a day every at other events.
Also these tend to foul easily. I would imagine more so on the green slide. What are some precautions other than not idling on the stand to prevent this?
I assume you want to know what to index it at. Anywhere between .025 and .040 depending on who you ask.What about the old one?
ThanksI assume you want to know what to index it at. Anywhere between .025 and .040 depending on who you ask.