A little lean?

wheelbender6 · 07-17-2022, 05:33 PM

Checked my plug while I had the tank off for a petcock change.
(yes, you have to pull the tank to remove the spark plug on an S40/Savage)
-The plug is darker than the photo shows, but I still think I'm running lean.
Suzi plug 071722.jpg

TominMO · 07-17-2022, 07:16 PM

For a carby, yeah perhaps a little lean. For EFI, probably OK. How does it run?

wheelbender6 · 07-17-2022, 08:47 PM

Its been running strong. Backfires like a Model T.

letsride · 07-17-2022, 11:34 PM

I can't see the pic of the plug for some reason but if it back fires on decel alot then surely you could bump the jet up in size a bit, and maybe even the pilot or go another turn out on the mixture screw. I just got done rebuilding the carbs and fixing the backfiring issue on my brother shadow after he thought it was a good idea to pull the baffles out of his long shots and toss em SMH. I went up on the main jets and went another turn out on the Idle air mixture screw. Back firing is gone but its still annoying as Hell and gives me a headache LOL

wheelbender6 · 07-18-2022, 07:08 PM

These motors are prone to backfiring. I tried to install a bigger pilot but stripped the head off of it.

07-17-2022, 05:33 PM	#1
wheelbender6 Join Date: May 2015 Location: Houston area Posts: 1,902	A little lean? Checked my plug while I had the tank off for a petcock change. (yes, you have to pull the tank to remove the spark plug on an S40/Savage) -The plug is darker than the photo shows, but I still think I'm running lean. Suzi plug 071722.jpg __________________ "Its not WHAT you ride; its THAT you ride"
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07-17-2022, 07:16 PM	#2
TominMO Join Date: Sep 2021 Location: De Soto, MO Posts: 1,875	For a carby, yeah perhaps a little lean. For EFI, probably OK. How does it run? __________________ 2021 Lifan Xpect--sold 2022 Lifan KPX 1972 Honda CT90--The Carrot 1969 Honda CT90--The Tomahto Cheesy is the WDK (workplace drama king). Now retired. Nope, back in the saddle. Climate: The Movie https://www.youtube.com/watch?v=A24fWmNA6lM How our government really works https://www.youtube.com/watch?v=QjadCd0VRBw Question all authority.....think for yourself
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07-17-2022, 08:47 PM	#3
wheelbender6 Join Date: May 2015 Location: Houston area Posts: 1,902	Its been running strong. Backfires like a Model T. __________________ "Its not WHAT you ride; its THAT you ride"
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07-17-2022, 11:34 PM	#4
letsride Join Date: Oct 2013 Location: Leesville SC Posts: 835	I can't see the pic of the plug for some reason but if it back fires on decel alot then surely you could bump the jet up in size a bit, and maybe even the pilot or go another turn out on the mixture screw. I just got done rebuilding the carbs and fixing the backfiring issue on my brother shadow after he thought it was a good idea to pull the baffles out of his long shots and toss em SMH. I went up on the main jets and went another turn out on the Idle air mixture screw. Back firing is gone but its still annoying as Hell and gives me a headache LOL __________________ My Stable- 2022 Lifan KPX250 , 2023 Royal Enfield Himalayan, 1992 Honda GL1500 Goldwing, SSR 70 Auto, Kymco Mongoose 90, Honda Four Trax 300
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07-18-2022, 07:08 PM	#5
wheelbender6 Join Date: May 2015 Location: Houston area Posts: 1,902	These motors are prone to backfiring. I tried to install a bigger pilot but stripped the head off of it. __________________ "Its not WHAT you ride; its THAT you ride"
	0