Who's online: Darth.Crag, Guests: 224
  • night_prowler Posts: 19
    Northern NSW
    Stock Poster night_prowler
    07 Sep 2019 07:21 AM
    Hi guys,
    I’ve been tearing my hair out over my Nightster pinging when hot and under load. 

    I’ve tried sticking with BP ultimate over the shit I get from my local Servo with little benefit, and I chucked a set of high compression screaming eagle plugs in which made the biggest difference but yesterday on my way home from work (particularly hot day) I wound it on in 5th to overtake and it was worst that I’ve ever heard. I’m at the point where I don’t want to ride it until it’s sorted, but it’s my main transport. 

    When I picked the plugs up I had a chat with the tech at my local HD dealer, and as I suspect from what I’ve read, it more than likely needs a new map with maybe more fuel or a timing adjustment. 

    I’ve got a Screamin Eagle tuner and I’d rather get the issue ironed out myself and learn something rather than handing over hundreds or more to the dealership.

    Aside from the pinging, it runs really well, starts up super easy everyday and pulls through the RPM’s smoothly so I’m hoping it’s only a minor adjustment and I can sort it with the help of some knowledgeable forum members. 

     If anyone has any advice on where to start, it’d be much appreciated. 


  • Krash Kinkade Posts: 2619
    Forum Legend Krash Kinkade
    08 Sep 2019 07:19 AM
    sorry to hear about your troubles.
    if it is pinging under load, I would shift back a gear to 4th gear.
    a few other things you could check, check cranking pressure see how high that is, and if you can check AFR under load see what that is.
  • Grease Monkey Posts: 697
    Performance Poster Grease Monkey
    08 Sep 2019 07:43 AM
    What Krash said on dropping a gear might alleviate the pinging some, however to me it's the tune that's the main culprit, couple of questions, what are the bikes modifications and what tuner do you have, the pro super tuner or the pro street tuner?
  • night_prowler Posts: 19
    Northern NSW
    Stock Poster night_prowler
    08 Sep 2019 08:06 AM
    Thanks for the reply fellas, I was definitely being lazy just leaving it in 5th, in cooler conditions it would pull along clean without an issue but being so hot it didn’t sound happy at all.

    Looking on the VCI it’s tuned for a 1275 kit, flat top pistons, 570 jackhammer cams, port and polished heads and intake manifold and 2 into 1 exhaust, the tuner is a screamin Eagle pro street tuner. It’s also got a bit of a dodgy chain drive setup at the moment which I’m about to revert back to belt temporarily, could it be possible that the gearing is too tall and asking too much of the engine? 

    HD Forums Australia - 0EE587D3-36C2-4E03-808E-79A7261ABEF1.jpeg

    HD Forums Australia - 45CAC937-E1D1-4756-928A-02B2CC65D4B9.jpeg

  • Grease Monkey Posts: 697
    Performance Poster Grease Monkey
    08 Sep 2019 08:46 AM
    That thing is ment to be revved, reckon you need to use your gears more, if it's been tuned right you should be golden, where was it tuned?
  • night_prowler Posts: 19
    Northern NSW
    Stock Poster night_prowler
    08 Sep 2019 10:08 AM
    I understand what you’re saying, it loves being up in the mid range plus but It’s definitely not a riding style issue, if it is pretty hot, especially around town, unless you are ultra steady during acceleration (and I mean like very REALLY ridiculously, slowly applying throttle) - even in lower gears - it pings.  

    Am I best to get a data run in to identify the issue on the tuner, then make the adjustments? Or should I be able to see what’s going on as soon as I plug the VCI in? 

    I found the old dyno sheet, from Fraser’s HD which I gather are a pretty reputable mob.. wether it has been re-tuned or not since, I have no idea but this is all I can go on at the moment;




    HD Forums Australia - 2BADB300-BF88-4CDC-8429-0D22693584DC.jpeg

    Also probably worth mentioning that the plugs were pretty white, I had the pipe off to have cracks and mounts welded up and noticed the inside of the headers and the exhaust ports were also white. 
  • Grease Monkey Posts: 697
    Performance Poster Grease Monkey
    08 Sep 2019 12:24 PM
    Having that info I'm 100% back to the tune, given that combo of parts if accurate that bike should pull over 100hp and white plugs is lean, if the parts list is real it's not one you want to learn how to tune in, I mean you could but you could also cause it damage, you in Melbourne? If so give Brian at Eastern Big Twin a call, he can tune, Lushy at Victor Harbour in SA is also a good tuner.
  • night_prowler Posts: 19
    Northern NSW
    Stock Poster night_prowler
    08 Sep 2019 01:25 PM
    Ok so I plugged in the VCI and straight away this stood out to me, I’m no mechanic but the red highlights seem to be right around where I’m hearing the ping, or at least I’m guessing so because I don’t have a tacho, I was going to adjust these numbers, they’re all at their maximum potential figure, they can only be decreased so I’m assuming that is less air in the ratio but I’m starting to feel like I’d be better off leaving it to a pro... 

    HD Forums Australia - D2538B37-1138-46E8-B6F5-2DC687700DB3.jpeg

    I can only assume it has all the hardware that the VCI is tuned for, but I told my friend who is a mechanic about the dyno figures and he also said they’re pretty underwhelming for the alleged configuration so maybe the whole shit fight needs a good going over. There’s a lot of guess work involved at the moment because I have very limited info, I had no idea it had the work done when I bought it, which is odd that old mate wouldn’t tell me, I guess it’s a selling point for some but a deterrent for others. I never really asked anyway, I just assumed it was mostly standard. 

    I’d also rather not making the situation any worse than what it is, and I’m thinking if I start playing with the AFR without knowing what I’m doing I could potential fuck something up. 

    I’m not in melbourne, I’m far north coast NSW, I’ve been told of a local guy who is apparently pretty handy at dyno tuning, he does a few ASBK bikes apparently so I think that’s my next port of call. 

    Thanks so much for taking the time to reply and help out, it’s much appreciated! 
  • Grease Monkey Posts: 697
    Performance Poster Grease Monkey
    08 Sep 2019 02:04 PM
    Can make that afr table a lot more friendly than that and it can only help, give me call and I'll talk you through it, way easier than trying to write it all down.
  • night_prowler Posts: 19
    Northern NSW
    Stock Poster night_prowler
    08 Sep 2019 02:24 PM
    Thanks Greasey, but I’ve just packed everything up and I’m dropping the bike in on Tuesday to get everything sorted properly so I won’t bother changing it, I really appreciate the offer though, bloody legend you are! 
  • Grease Monkey Posts: 697
    Performance Poster Grease Monkey
    08 Sep 2019 02:27 PM
    No worries
  • brash Posts: 647
    Performance Poster brash
    08 Sep 2019 03:04 PM
    Let me guess, this bike was tuned by a rotary tuner in melbourne?

    I won't name names but not hard to figure out. The term "ping is power" comes to mind ;)


  • night_prowler Posts: 19
    Northern NSW
    Stock Poster night_prowler
    08 Sep 2019 03:15 PM
    Hey Brash, I can’t be 100% certain if the bike has been tuned since but the dyno sheet above was from Fraser’s HD which I’m assuming is the Sydney store as the bike apparently spent most of its life down that way as far as I know. 

    I don’t know enough about mechanics or engine tuning but that was my assumption, they’ve got the thing highly strung to push out impressive figures which doesn’t actually interest me, I didn’t buy a sportster to race or set landspeed records. 

  • Grease Monkey Posts: 697
    Performance Poster Grease Monkey
    08 Sep 2019 03:28 PM
    Dunno where you are taking it but if they can tune you will love it when you get it back.
  • night_prowler Posts: 19
    Northern NSW
    Stock Poster night_prowler
    08 Sep 2019 03:40 PM
    Quoting Grease Monkey on 08 Sep 2019 03:28 PM
    Dunno where you are taking it but if they can tune you will love it when you get it back.
    I bloody hope so! I will post updates, I’m really happy with it as is so any improvement will just be a bonus! 
  • Grease Monkey Posts: 697
    Performance Poster Grease Monkey
    15 Sep 2019 01:27 PM
    Quoting Grease Monkey on 08 Sep 2019 03:28 PM
    Dunno where you are taking it but if they can tune you will love it when you get it back.
    Quoting night_prowler on 08 Sep 2019 03:40 PM
    I bloody hope so! I will post updates, I’m really happy with it as is so any improvement will just be a bonus! 
    How did it turn out cobber?
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