Read these plugs?
#41
Natural light
Natural light and more pix. You can tell the difference between front and rear cylinder. Bike starts and runs great through all ranges weather hot or cold, 35-100 degree outside temperature. Slight exhaust babble when coming off throttle. Backfires (pops) one time once in a while on start. Some may think that is a ceramic glaze but actually I think its just a deposit from fuel and oil. It scrapes off easily. Nathan if yours scrapes off easily with a slight swipe with a screwdriver its not hot glaze like some are saying. Your electron microscope picture is misleading I believe. My bike supposedly was mapped by dealer for open python exhaust that was on bike when I got it. It has new takeoff 96ci nightrain factories on it now..... Nathan inswva how did you attach your two pictures in your fp?? Are they a signature?
Last edited by Jackie Paper; 10-22-2010 at 10:10 AM.
#43
Join Date: Sep 2009
Location: The Internet (& Dyer, Indiana)
Posts: 7,580
Likes: 0
Received 7 Likes
on
7 Posts
9k miles on those plugs? Don't change a thing. Leave it alone.
Your plugs DO look slightly lean , but the more telling part is that you said you get "pops" on deceleration . That is a definate sign of running a bit lean . As some other have said , I would say one size up on your jet .
Pops out the pipe mean rich, (during acceleration).
During decel, don't mean much, considering pipes have such a huge effect on decel pop. Unburnt fuel igniting in the pipe. You can tune it out by making some adjustments in 0% throttle position (if you have a tuning device on the bike). But actions during decel have little to do with how the bike runs during accel.
This is an EFI bike, right?
#47
Here in Georgia "POP" is what we call it when we hit you in the mouth, or what we do to pimples, bug bites, and black heads.
#48
I wouldn't be concerned-- as others have said may be a tad lean. You really should have chopped the ignition at speed after a steady run then removed them for a look.
Plugs that look grey-ish white are generally considered good to go these days.
Plugs that look grey-ish white are generally considered good to go these days.
#50
Natural light and more pix. You can tell the difference between front and rear cylinder. Bike starts and runs great through all ranges weather hot or cold, 35-100 degree outside temperature. Slight exhaust babble when coming off throttle. Backfires (pops) one time once in a while on start. Some may think that is a ceramic glaze but actually I think its just a deposit from fuel and oil. It scrapes off easily. Nathan if yours scrapes off easily with a slight swipe with a screwdriver its not hot glaze like some are saying. Your electron microscope picture is misleading I believe. My bike supposedly was mapped by dealer for open python exhaust that was on bike when I got it. It has new takeoff 96ci nightrain factories on it now..... Nathan inswva how did you attach your two pictures in your fp?? Are they a signature?
An exhaust "babble" is not necessarily decel pop. I had a early pair of SE slip ons that made a babbling sound on decel and the 2 sounds are totally different.
Looking at the plug pics did you clean the right plug in the pic? If not the left plug is just a leeeetle bit lean.
Nothing to worry about in my opinion.