White plug ,Lean running ?
Posted November 13, 2001 - 04:00 AM
I posted yesterday about removing the the airbox lid and a slight backfire when shuting off. Last nite I pulled the plug out ant it was very white. The bike idles and starts well and has plenty of top end. Mid range seems ok, but I have nothing to compare it against. If the plug is white, what should be the first mod, raise needle or increase jet size?
Posted November 13, 2001 - 06:44 AM
Posted November 13, 2001 - 06:46 AM
A white plug is ok...sort of!!! I don't jet my bike according to the plug reading. It is an indicator of possibly being lean but there are other factors too. Plug color should not be your primary concern when jetting. Also, if you are running pump gas it will read lighter than if using race gas.
I think you are on the right track by raising the needle one clip position. If the bike is idling ok and runs good on top, raise the needle one position and try it out. I don't remember what your jetting is but in your last post you said it backfired slightly on decel. That indicates a lean pilot.
Sometimes these bikes can be difficult to jet. I have been toying with my jetting for three weeks after doing the BK mod and I think I finally have it right.
Posted November 13, 2001 - 07:02 AM
Posted November 17, 2001 - 01:26 AM
lowered the clip to #5 position but bike still backfires slightly. It also started to struggle to return to idle, took about 5 seconds. Any suggestions what to try next.
The bike is totally standard.
screw out 2 turns.
Posted November 17, 2001 - 01:52 PM
Posted November 17, 2001 - 07:28 PM
Posted November 21, 2001 - 02:53 AM
Fules screw should optimally be between 1 and 2 turns from seated.