Thank you.
That’s an interesting point that on reflection might have been the issue I had with my previous bike (CVO Dyna), which always played up for a minute or two when it was re-started a few minutes after a run when the engine was still hot. I always thought it might be fuel evaporation in the injection system due to the heat, but you might well have a more credible solution there and it may be part of my current issue.👍🏻

 

I swapped out my intake with the aluminum one and it didn't help a bit, does the exact same thing. I was told by a couple tuners that it's just an M8 thing. I have a PV with a canned tune from Fuel Moto. The bike runs awesome it just has a weird idle. I have checked for intake leaks every way imaginable and can not find one. It really doesn't act like an intake leak it's too consistent. I can play with the clutch at a stop and make it do it, so I believe it has something to do with the clutch switch. 2018 Heritage 114, Eliminator 300 slip ons and PV tuner.

 

Thanks for the info!
All the feedback seems to indicate that it’s an M8 quirk that can be tuned out.
My dealership have relented and fitted an FP3 to replace the one they still think they gave me.🤔
Turns out they finally did some research themselves and have suggested that the revs automatically increase when the revs drop below a preset factory threshold and you pull the clutch in, presumably to prevent stalling (like we need that level of intervention&#128518.
So….they’re using the FP3 to reset the idle parameters and believe that should solve the problem. They haven’t test ridden it yet, so fingers crossed that solves the problem. Although I also hope they haven’t elevated the idle speed much above 1000rpm to achieve the result, or it’ll just overheat quicker on hot days in traffic. Plus it won’t be a happy, relaxing place to be, if it’s idling at 1100-1200rpm!
I’ll repost if it’s fixed. It might help other M8 owners frustrated by the same ‘quirk’.
Of course HD could always step in with a free factory s/ware patch to fix the problem they’ve designed in. Personally I trust myself not to stall my bike in traffic. I don’t want HD interfering with my ride…..thank you!

 

I agree. I wish it didn't do it but I am going to just try and ignore it. Not sure I can. Please let me know if they tuned it out on yours. Thanks

 

Happy to!
On reflection I bought the bike off a guy who already had a slightly earlier model Breakout (amongst several other bikes), and he told me the only reason he sold the later M8 model, was that he genuinely preferred riding the earlier model and thought on balance that it looked better, especially the tank design.
I actually agree with the latter point, but I suspect this weird fast idling issue might actually have been the primary reason, especially if he was riding them back-to-back, which would really highlight the difference in characteristics.
I’ll keep you posted👍🏻

 

Thanks a lot Gunny

 

Hey Gunny
Were they able to tune out the erratic idle on your bike?

 

the m8 has been in production for 4 years now. if this is a quirk of the m8, then why do only a small handful do it? i've never seen one. mine certainly hasn't.

 

I agree. It is strange that they don't all do it.

 

Hi all,
Apologies for going quiet on this thread. So much stuff going on in my life that I didn’t get to test the bike properly until a recent run out to the Super Sausage with some old friends.
Update: Newmarket HD (the dealership who have being trying, unsuccessfully, to fix the issue), fitted a V&H FP3 and claimed to have tuned the problem out by reducing the idle speed in an attempt to overcome any issues created by the standard sensors controlling the idle speed in traffic.
When I collected the bike and rode it home, it was immediately apparent that it ran ‘differently’ but that in slow traffic the original problem was still there.
My recent ride out confirmed that all that’s really changed is that the bike now idles at slower rpm when it finally settles down (about 920-950 rpm), but here’s the thing…..to try as many scenarios as I could, I tried shutting the throttle, pulling the clutch in and coasting and the revs immediately dropped down to a steady idle @ 920-950rpm, but only until I was almost at a standstill.
Riding it normally in traffic if I did the same as I slowed down to a halt with the clutch pulled in ready to stop behind the car in front, as soon as the coasting speed dropped below 8mph, the revs automatically rose to 1,300rpm+ and stayed at that level until I reached a complete stop. This is essentially exactly the same issue I reported to Newmarket HD, who have now sent me home twice on a bike they claimed to have either fixed, or indeed that they had test ridden and the tech reported ‘no fault found’, which beggars belief as I described the fault accurately and the conditions under which it manifested itself, so it should have been easy for a qualified tech to identify. Simply riding it in stop start traffic is all takes to experience the issue.
I’ve been riding bikes for a lifetime and I know what’s right and what’s not. I’ve also owned a fuel injected CVO Dyna for 10 years, so i am familiar with most ‘quirks’ of the fuelling, but this one is infuriatingly consistent, so I just don’t understand how a big dealership can not only fail to fix it, but also send me home on it claiming they had done exactly that and for me to experience the same issue before even leaving their trading estate.
It’s clear from some comments that this is not a problem everyone has with identical bikes, which is good to know, but it does exist on my bike and I need to get it fixed by someone who can ride it, recognise that it’s a genuine and consistent problem and help me fix it.
A layman would immediately pick up on the issue after a short ride in traffic, but it’s clearly going to take a savvy tech to fix it….
Can anyone assist please?🤞🏻