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Ticking noise at full throttle (Read 4 times)
Dan
Ex Member
Ticking noise at full throttle
08/26/05 at 18:28:04
I just added a K&N drop in filter and have an 87 (which already comes with a 155 main jet in the carb and no spacers to worry about.
When I added the filter I adjusted the mixture screw out 1.5 turns, and it doesn't backfire much with it there. What does happen though, is that at full throttle (and I mean full...), there is an irregular ticking in the engine that immediately subsides if I let of the throttle.
Is this a noise related to not having enough "outflow" for my new inflow? A problem with too much or little gas? A spark issue (I still haven't replaced the plug with one of the iridium plugs I read about)? Something worse?
I am planning to get a new carb (LANCER VARIETY), but want to make sure I am not feeding a serious problem w/ non-necessary accessories.
HELP THE NEW GUY!!!
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Dan
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Re: Ticking noise at full throttle
Reply #1 -
08/26/05 at 18:54:41
BTW, I am adding a Sportster muffler (that will be here on Monday) so the outflow issue will hopefully be resolved (mostly).
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slavy
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Re: Ticking noise at full throttle
Reply #2 -
08/27/05 at 09:34:27
Don't take the jetting like cast in stone. The sizes that work on '96 and newer bikes don't work on '86-'88. If the carb. mod's call for about 2 sizes bigger main jet, You have to go according Your main jet size, especially if You intend to put HD exhaust. I think the sound You are hearing is a sign of very hot running caused by lean mixture on the top end. I'd suggest 160-162.5 main jet.
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Savage_Greg
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Re: Ticking noise at full throttle
Reply #3 -
08/27/05 at 09:45:19
Dan wrote
on 12/31/69 at 16:00:08:
I just added a K&N drop in filter and have an 87 (which already comes with a 155 main jet in the carb and no spacers to worry about.
When I added the filter I adjusted the mixture screw out 1.5 turns, and it doesn't backfire much with it there. What does happen though, is that at full throttle (and I mean full...), there is an irregular ticking in the engine that immediately subsides if I let of the throttle.
Is this a noise related to not having enough "outflow" for my new inflow? A problem with too much or little gas? A spark issue (I still haven't replaced the plug with one of the iridium plugs I read about)? Something worse?
I am planning to get a new carb (LANCER VARIETY), but want to make sure I am not feeding a serious problem w/ non-necessary accessories.
HELP THE NEW GUY!!!
Are you talking about WOT with the bike sitting still or are you riding it when you hear this? Where does it come from?
BTW - You can never have a different inflow and outflow. One of them always limits the other. Even if you increase the flow "potential" with the K&N it will only flow what the exhaust will allow. If your muffler is stock, the K&N probably didn't increase it much.....but the K&N is reusable and that is a plus anyway.
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threezukes
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Re: Ticking noise at full throttle
Reply #4 -
08/27/05 at 18:43:43
Mine does it too, could it just be noisy valves?
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Dan
Ex Member
Re: Ticking noise at full throttle
Reply #5 -
08/28/05 at 06:43:07
This only happens during hard acceleration. I can't get it to happen in neutral while throttling. It is only on the hardest acceleration, other than that, I haven't heard it.
It does seem to be below the tank, but it is hard to say for certain, as I don't like (feel really comfortable) putting my head out to the side of the bike when I am accelerating hard.
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Savage_Greg
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Re: Ticking noise at full throttle
Reply #6 -
08/28/05 at 06:59:07
Dan wrote
on 12/31/69 at 16:00:08:
This only happens during hard acceleration. I can't get it to happen in neutral while throttling. It is only on the hardest acceleration, other than that, I haven't heard it.
It does seem to be below the tank, but it is hard to say for certain, as I don't like (feel really comfortable) putting my head out to the side of the bike when I am accelerating hard.
Without a little more to go on, the only thing that I can suggest would be some routine maintenance. Adjust the valves, change the plug, check the decompression lever, and change the oil. Check all nuts and bolts for tightness. Sometimes when doing that routine stuff you will find a problem or fix it by accident.
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Dan
Ex Member
Re: Ticking noise at full throttle
Reply #7 -
08/28/05 at 07:37:42
I am planning to replace the plug, etc. at the same time as I put on a new carb from Lancer. "Checking the Valves, etc.": is that difficult to do?
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Savage_Greg
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Re: Ticking noise at full throttle
Reply #8 -
08/28/05 at 07:44:41
Dan wrote
on 12/31/69 at 16:00:08:
I am planning to replace the plug, etc. at the same time as I put on a new carb from Lancer. "Checking the Valves, etc.": is that difficult to do?
It is a bit of a PITA, but if you are patient with maintenance things, it's no big deal. It is real simple to do with the engine sitting on a bench, if that tells you anything
Do you have a manual? Don't even begin without one.
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Dan
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Re: Ticking noise at full throttle
Reply #9 -
08/28/05 at 09:04:34
Yes, I have the Clymer and the original manual. I get the idea about checking valves, etc. though...
Hopefully some of the smaller items will fix the problem.
Thanks for your help.
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Ed L.
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Re: Ticking noise at full throttle
Reply #10 -
08/28/05 at 17:38:01
Maybe the noise you hear is the belt ticking under WOT. If it is not doing it when standing still it sounds like it could be a drivetrain noise, just a thought.
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Silver '02, clubman handle bars, Cobra headlight, Sportster muffler, K+N stock air filter, 152.5 main, Superbrace, oil cooler, 1/2 inch aluminium plate forward controls, spark advance, goes like stink
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Re: Ticking noise at full throttle
Reply #11 -
08/28/05 at 19:43:57
Feed it some premium fuel and see if changes, if it's hot where you are it may be a good old fashion ping.
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