Idle Idle fluctuating
Seasoned HDF Member
Joined: Sep 2009
Posts: 17,148
Likes: 6,171
From: SE Michigan
I'm not sure I understand this assertion. I dont find either of the two M8's I've owned have or had any more of an "unstable" idle than the twin cams I've owned. They all have an uneven idle, Nature of the v-45 beast.
Last edited by Keithhu; May 12, 2019 at 02:42 PM.
Cruiser
Joined: Jan 2019
Posts: 110
Likes: 24
From: Bratislava
And sounds like lovely galloping horse 🐎 (starts at the 30s)
Last edited by TomBe; May 12, 2019 at 04:58 PM.
Road Master
Joined: Jun 2011
Posts: 836
Likes: 230
From: Deep South
High start up idle ...
Hey Springers4ever....got a question for you since you've seen the stock tunes....my 2019 Road Glide rpm always shoots to 2400 the second it fires up... It drops right down in a couple seconds to a normal cold idle (around 1200 or so). It definitely shoots to 2400 with EVERY start. I'm in FL and don't ride below 70 deg so it can't be a cold weather setting. Is there something in the tune you've seen that will cause this?
thanks
thanks
think of it like a carb bike ...you pump the throttle once or twice (to shoot fuel in from the accelerator pump) , crack the throttle open while starting ...this make the motor start reving high for just a moment ...
the Moco must inject a larger amount of fuel to get these bigger and bigger motors to start ...
Last edited by springers4ever; May 12, 2019 at 07:59 PM.
Road Master
Joined: Jun 2011
Posts: 836
Likes: 230
From: Deep South
Warm up fuel ...
You need to state how much. I would say my m8 idle bounces around more than my twin cam but I am also looking at a digital readout vs analog on the twin cam. I posted before about a roblem with startup idle,had some warranty work done, problem still there of it going too lean and back to normal. Unusual but it is now back to normal and I have no idea why? Have a few ideas but nothing I can prove but happy to not.be stalling out on startup.
Road Captain
Joined: Jul 2011
Posts: 522
Likes: 204
From: dunedin, fl
no, no, no, no!!!!
Had 3 M8's in 2 yrs. erratic idle, reaching, loaping, is due to clutch safety switch. each bike had to have warranty replacement with new style. eventually, the bike won't start in gear, but have dealer replace switch ahead of any problems. if he gives u any ****, play the highway safety card. there is a service bulletin on the new design, it's on this site somewhere. your idle should be a CONSISTANT 850 rpm, and shouldn't reach or fluctuate.
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Tourer
Joined: Dec 2012
Posts: 258
Likes: 48
From: SoCal
Don't mean to hijack the thread. Is what I should have said is that My M8 Shakes at idle like a twin cam The hunting isn't an issue ! This post sheds some light on the subject of idle mapping
Stellar HDF Member
Joined: Aug 2008
Posts: 2,060
Likes: 157
Had 3 M8's in 2 yrs. erratic idle, reaching, loaping, is due to clutch safety switch. each bike had to have warranty replacement with new style. eventually, the bike won't start in gear, but have dealer replace switch ahead of any problems. if he gives u any ****, play the highway safety card. there is a service bulletin on the new design, it's on this site somewhere. your idle should be a CONSISTANT 850 rpm, and shouldn't reach or fluctuate.
Last edited by YPD485; May 13, 2019 at 06:34 PM.
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