White spark plugs
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Seasoned HDF Member
Joined: Sep 2012
Posts: 6,570
Likes: 590
From: almost there
First warm up engine on short 3-4 mile ride, then run thru the gears fast and hard about 1/2 mile just before you park it in your garage, you will get your best plug reading.
Also all this will change after pipe install, so just wait until pipe install.
Seasoned HDF Member
Joined: Dec 2010
Posts: 7,736
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From: Coromandel Peninsula New Zealand
Best plug reading is when you hit the kill switch when you are riding, whatever rpm you do it at will give you the colour for that throttle opening.
Old skool but it works.....no Dyno for miles around out here in KKK.
Old skool but it works.....no Dyno for miles around out here in KKK.
Road Warrior
Joined: Aug 2011
Posts: 1,991
Likes: 9
From: washington
is that what your saying Spanners?
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Seasoned HDF Member
Joined: Sep 2012
Posts: 6,570
Likes: 590
From: almost there
Thanks Spann, good idea. I usually wait till my engine is cooled before I pull the plug.
Last edited by aces&8s; Apr 23, 2014 at 06:39 PM.
Club Member
Joined: Apr 2011
Posts: 5,816
Likes: 7,847
From: SE Louisiana
Pull the clutch and kill it right away, like Spanners says, you can take a snapshot at different throttle openings.
Hold the throttle for a good while at the opening you want to check, or long as you can for a WOT check.
Usually referred to as a plug chop.
Yea aces, pulling the plugs on a hot engine makes you kinda worry about the plug hole threads, a little neverseeze and never had a problem.
Or just pull a beer out your saddlebag and sit there and let it cool, I never done that
Hold the throttle for a good while at the opening you want to check, or long as you can for a WOT check.
Usually referred to as a plug chop.
Yea aces, pulling the plugs on a hot engine makes you kinda worry about the plug hole threads, a little neverseeze and never had a problem.
Or just pull a beer out your saddlebag and sit there and let it cool, I never done that
4th Gear
Joined: Apr 2014
Posts: 8
Likes: 0
From: Peoria Illinois
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4th Gear
Joined: Apr 2014
Posts: 8
Likes: 0
From: Peoria Illinois
Gooood! Lol thank you I've only had this bike for about 2 years and this year I went with full new exhaust, and a heavy breather I do all my own work so I wasn't too sure.....I still have a small dead spot in my tuning just over 25% throttle but idk how to fix that yet