spark plug
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Stellar HDF Member
Joined: May 2018
Posts: 2,159
Likes: 432
From: australia
spark plug
a mates fx shovel was misfiring on the rear cylinder.pulled both plugs and looked good even had a second opinion.so just out of curiosity replaced the rear plug and all is good. has anyone come across that before thanks
Seasoned HDF Member
Joined: Jul 2014
Posts: 8,565
Likes: 3,318
From: Cental, MI
Found many times that the Squirter is pointed at one cylinder or another ... an a Throttle Jockey can foul the cylinder being Squirted... Just sayin..
BTW As a matter of fact..., While riding.. The rear runs Cooler... Check for yerself..
Know Why???
Flame on!!!!
Road Master
Joined: Apr 2012
Posts: 979
Likes: 38
From: new orleans,la
your gonna be told by the pros on here that the "front" cylinder is the one that runs hotter- and I agree---
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Grand HDF Member
Joined: Dec 2014
Posts: 4,890
Likes: 553
From: USA
I can vouch for that....after I replaced my fairly new AC Delco with new NGK and setting idle, I couldn't start the bike. Cleaned the NGK and still could not start. Removed the NGK and replaced with new AC Delco and started right up. NGK no more.
Last edited by hscic; Jan 15, 2019 at 05:49 PM.
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Seasoned HDF Member
Joined: Nov 2006
Posts: 12,878
Likes: 5,448
From: la la land jerzey
well the front cylinder is hotter TO ME for a couple of reasons
1 its out of the way in the oil spray from the flywheels unlike the rear
2 the pull of the machine as its going forward the intake mixture is heavy latent with fuel this causes it to lean out - But if you tilt the carb to the rear a few degrees that goes away just like the XL factory 2 carb race bikes the carbs angled to the rear - on a dyno we looked at that and the egt did fall off ( went rich ) with the angle - but then the rear didn't like it
1 its out of the way in the oil spray from the flywheels unlike the rear
2 the pull of the machine as its going forward the intake mixture is heavy latent with fuel this causes it to lean out - But if you tilt the carb to the rear a few degrees that goes away just like the XL factory 2 carb race bikes the carbs angled to the rear - on a dyno we looked at that and the egt did fall off ( went rich ) with the angle - but then the rear didn't like it
Road Master
Joined: Nov 2018
Posts: 873
Likes: 159
From: FLORIDA
wow I don't get it the front cylinder catches the fresh air first
how can it be hotter and why Harley designed a device for
putting air on the rear cylinder it fits on the dressers I'm sure
somebody here has one
how can it be hotter and why Harley designed a device for
putting air on the rear cylinder it fits on the dressers I'm sure
somebody here has one