M8 - Knocking sound between 1800 and 2300 rpm ...
#41
11-25-2018, 06:27 AM
Seasoned HDF Member
Looks like its not my comp. Tried the test even taking it to 2000rpm and zero noise from comp.
Its only when engine is between 2200rpm to 3000 rpm on less than 30% throttle and no load. As soon as any load comes on incld going up a steep hill it disappears. Dosnt make the noise in netural or in first gear with clutch in reving it up to 3000 rpm.
Bike has to be in motion on road . Does it in all gears.
Its made the noise since around 1000 klm.
Its a Thock thock thock sound . Loud if you put your head at the front of the tank
Dosnt sound at all like metal to metal contact.
more like a main bearing knock.
Its only when engine is between 2200rpm to 3000 rpm on less than 30% throttle and no load. As soon as any load comes on incld going up a steep hill it disappears. Dosnt make the noise in netural or in first gear with clutch in reving it up to 3000 rpm.
Bike has to be in motion on road . Does it in all gears.
Its made the noise since around 1000 klm.
Its a Thock thock thock sound . Loud if you put your head at the front of the tank
Dosnt sound at all like metal to metal contact.
more like a main bearing knock.
#42
11-25-2018, 10:32 AM
Road Master
#43
11-25-2018, 12:20 PM
2nd Gear
Join Date: Nov 2018
Location: Marlborough
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It must be the normal m8 engine sound as it would have blown uo by now if it was anything serious. Ive drivin It hard on ocassions. Rev limiter in gears . Helld at 160 klm/hr for 30 mins and nailed it to a top speed of 185k.
I must add it runs very hot and the cooling fans come on as soon as one pulls up to rest or you are going at low speed but it does over 50mpg criusing at 70mph.
I will get dealer to go over it and take it for a drive at the 8000 klm service in a few weeks time. Will add on what they say then.
Cheers, Thanks for the help.
I must add it runs very hot and the cooling fans come on as soon as one pulls up to rest or you are going at low speed but it does over 50mpg criusing at 70mph.
I will get dealer to go over it and take it for a drive at the 8000 klm service in a few weeks time. Will add on what they say then.
Cheers, Thanks for the help.
#44
11-25-2018, 01:06 PM
Grand HDF Member
The exhaust cross over pipe connection at the head pipe is the least secure connection of the three clamped joints, Infact when doing maintenance where you want the left muffler removed, its much easier to pull the left muffler and crossover pipe as a unit, than it is to just remove the muffler. A loose connection at this clamp point can make some good racket. sounding like a deep knocking.
#45
03-25-2022, 05:36 PM
Novice
#46
03-25-2022, 05:48 PM
Seasoned HDF Member
I have a 2020 107 FLHX with 15,000 miles. If I’m in, say, 3rd, 4th, 5th... at, say, 2200-2500 RPM, and “get on it” it knocks. Sounds like wrenches clanking, or car keys ever so briefly. It’s just for a split second.
I’m running a Powervision tuner and have sent datalogs to Fuel Moto. They say I shouldn’t be able to hear what little (normal) detonation they see in the logs.
I have given up trying to figure out what it is.
The bike runs GREAT with an HD Ventilator AC, and Fullsac 2” baffles welded in the stock slip ons, and decatted head pipe.
I’m running a Powervision tuner and have sent datalogs to Fuel Moto. They say I shouldn’t be able to hear what little (normal) detonation they see in the logs.
I have given up trying to figure out what it is.
The bike runs GREAT with an HD Ventilator AC, and Fullsac 2” baffles welded in the stock slip ons, and decatted head pipe.
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Milwaukee Eight (M8)
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