white plug running lean

Mick 347 · 10-17-2022, 11:01 AM

i just got my kpx 250 about 3 weeks ago i put 80 miles on it .Its running very lean the plug is white im running 91 gas an the plug that came with it.Any one out their have this problem.

**JerryHawk250** · 10-17-2022, 11:06 AM

These engines are tuned to run lean in order to meet EPA regulation. Why are you running 91 octane? These engines only require 87 octane. Ethanol free if possible.

IdahoRider · 10-17-2022, 11:58 AM

Did your KPX come with an NGK plug and have you checked the gap? I was surprised mine came with an NGK plug and the gap was spot on. I've only used 87 octane, and mostly ethanol free gas, and the plug has looked good for 840 miles.

10-17-2022, 11:01 AM	#1
Mick 347 Join Date: Sep 2022 Posts: 1	white plug running lean i just got my kpx 250 about 3 weeks ago i put 80 miles on it .Its running very lean the plug is white im running 91 gas an the plug that came with it.Any one out their have this problem.
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10-17-2022, 11:06 AM	#2
JerryHawk250 Moderator Join Date: Oct 2016 Location: Houma, La. Posts: 11,709	These engines are tuned to run lean in order to meet EPA regulation. Why are you running 91 octane? These engines only require 87 octane. Ethanol free if possible. __________________ 2024 Linhai 300 ATV 4x4 2023 Lifan Lycan 250 Chopper 2023 Venom Evader 2022 Lifan KPX250 2020 Kawasaki Vulcan S (Sold) 2004 Honda ST 1300 2016 Black Hawk 250 (sold) Keihin PE30 carb,125 main,38 slow.Pod filter,ported & decked head 10:1 CR,Direct Ignition Coil,15/40Sprockets,NGK DPR8EIX-9,De-Cat,Dual Oil Cooler,Digital Cluster 2016 Cazador180 XL 2014 Coolster150 JerryHawk250.com My YouTube Channel
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10-17-2022, 11:58 AM	#3
IdahoRider Join Date: Aug 2022 Posts: 175	Did your KPX come with an NGK plug and have you checked the gap? I was surprised mine came with an NGK plug and the gap was spot on. I've only used 87 octane, and mostly ethanol free gas, and the plug has looked good for 840 miles.
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