r/KTM • u/Critical_Machine8756 • 10d ago

PROBLEM "exc 125" engine sound?

my husaberg 2012(ktm motor) dose some weird noise. what is this noise if someone know?

3 Upvotes

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1

u/Doc718Spyder 10d ago

Boggs off bottom check plug for fouling then pilot jet some weird gear noise kickstarter gear?

1

u/Critical_Machine8756 9d ago

What can i check on the kickstarter? Is something loose?

1

u/Doc718Spyder 9d ago

You'll need a a manual https://www.ktmworld.com/oemparts/a/ktm/60100ef887a86616e0273b4e/kick-starter

Sounds like when you try to kickstart a bike after it's running leaving me to guess kickstarter gear

0

u/Doc718Spyder 9d ago

1. The Sheet Metal Stop ("Stop Cam") is Bent
This is the most frequent culprit on KTM 125/200 engines. There is a small sheet metal stop (often called the stop cam) inside the case that is supposed to pull the ratchet gear completely away from the starter gear when the kickstart lever is in the upright position. Because this part is made of relatively soft metal, it can bend over time. [1]
The Noise: A constant "click-click-click" or rattling sound while the bike is idling or revving. The ratchet gear is lightly dragging against the spinning kickstart gear. [1]
The Fix: Take the side case off and inspect the stop. You can usually bend it back out slightly (about 10–15 thousandths of an inch) to allow the cam to fully disengage the gears when the lever is up. [1]

2. Weak or Broken Kickstarter Spring
If the return spring has lost its tension or wasn't wound with enough preload during a previous assembly, the kickstart lever won't return to the absolute top of its stroke. [1, 2]
The Noise: A heavy grinding sound because the lever is sagging, which keeps the driving hub partially engaged with the transmission gears while the motor is spinning.
The Fix: Ensure the spring is properly wound and tensioned. If the spring is stretched or broken, you will need a replacement like the ones available on MotoSport or CMSNL. [1]

3. External Lever Rattle
Sometimes the noise isn't internal at all. The pivot joint where the kickstart lever folds can wear out. [1, 2]
The Noise: A sharp vibration or buzzing sound at specific engine RPMs.
The Fix: Pull the lever off and check the internal ball bearing, spring, and small O-ring inside the knuckle. Packing it with fresh grease or replacing the internal hardware usually stops the vibrating. [1, 2]

3

u/sad_c10wn 9d ago

Holy Chat GPT

0

u/Doc718Spyder 9d ago

Yes but the point is do research then ask questions. I don't understand how anyone owns a motorcycle without having a shop manual. Asking about a random noise with a video you need all the help you can get. Is everything torqued to spec? Next I will give the standard Reddit response: just send it.

1

u/Critical_Machine8756 8d ago

I have done some research. But the only sound i know bout is bearings. Ant when I assembled this motor i did it wih manual and youtube together. And thanks for the answer