Posts
2
Joined
3/18/2024
Location
Bishops falls, NL, CA
06 yz250
Apex head mx dome
Fmf gnarly/shorty
Boyesen rad valve/power reeds
Trail riding like I normally would for about an hour of runtime, few shutdowns/breaks throughout.
Sea level, 24c, 91 pump gas mixed 32:1
#178 main
#45 pilot, 1 turn out air screw
Necj 3rd clip, #8 slide
#40 powerjet
You can't jet a bike on the internet.
Looks lean to me. Air / fuel ratio, not oil ratio.
^I was going to say lean also. Most of my plugs are browner than that after one hour. The whitish deposit where the ground meets the threads makes me worry a little. I'd try moving your clip down one position and see if it makes any more power (it may). Your plug should go a little darker after that.
Another vote for lean…recent rebuild? Is that Apex suggested jetting? I have an Apex head on my 2001 YZ250…I used their suggested jetting right on the $ for my Mx tracks….agree with Falcon, on the richer clip position test. That needle is leaner than what they suggest?
Post a reply to: validate my plug fellers