Sierra-Striking noise in engine head ?!

[2LZ]

Originally Posted by azriel

Gotta find some cheap aftermarket silencers

both Spud and myself are fans of the FMF Turbine Core II. Around a hundred bucks, will bolt eright on, sounds great and also, passes USFS Approval.
I know this may be a stupid question or I may have missed it but when did you last change your oil? As you know, they only hold a quart. I change mine constantly. Cheap insurance.

[azriel]

Originally Posted by 2LZ

... when did you last change your oil? As you know, they only hold a quart. I change mine constantly. Cheap insurance.

I changed it before few weeks. Rode it for Aprox. 150-200 kms after oil change.
Indeed-Cheap insurance

Ill see if a can get one FMF here in Croatia,the ones from Ebay are a bit expensive for me when you count in shipping and duty,taxes... :?

[azriel]

Well i finally isolated the knocking/striking sound source...
Im amazed how it travels through the engine and can fool you 8O
Actually it is not the top end :oops: :oops: :oops:




After checking everything again and again and once again :roll: i realized its definitely coming from this part of the engine (yellow circle) and travels all over the place...on the right side of the engine its also hearable but not so loud as it is here(yellow circle),under the tank its also hearable almost as loud as here(yellow circle) so i thought it was the top end :oops: :oops: :oops:


Final question-could it be normal sound of drivetrain ,or something related to it ,operating and sligtly knocking,so i just take care of oil level (currently im on Valvoline Durablend 10w40 full sinthetic) and service intervals, or maybe a bad bearing somewhere so i need to break in the motor and check everything up? :?

I founded on the tw200 forums that these engines are quite noisy little buggers
Thank you all once again on your time helping me out!
Azriel

[SpudRider]

Originally Posted by azriel

...After checking everything again and again and once again :roll: i realized its definitely coming from this part of the engine (yellow circle) and travels all over the place...

Final question-could it be normal sound of drivetrain ,or something related to it ,operating and sligtly knocking...

I founded on the tw200 forums that these engines are quite noisy little buggers
Thank you all once again on your time helping me out!
Azriel

The only thing under that portion of the left crankcase cover is the countershaft, and the countershaft sprocket.



When the engine is idling, neither the countershaft, nor the drive chain is turning; therefore, you should not hear any noise.

Indeed, these little engines make some noise. I did not hear any unusual sounds when I listened to your video; therefore, I don't think you have any problems with your engine.

Spud

[azriel]

You are fast Spud!
I know that these parts are not turning when idling, just saying that the noise is coming from this portion of the engine,somewhere under the countershaft sprocket,from the inside... :?

[SpudRider]

Originally Posted by azriel

...I know that these parts are not turning when idling, just saying that the noise is coming from this portion of the engine,somewhere under the countershaft sprocket,from the inside... :?

OK. If your engine is running well, and the bike is shifting well, I believe your engine is in good condition. I did not hear any unusual sounds when I listened to your video; therefore, I don't think you have any problems with your engine.

Spud

[azriel]

Originally Posted by SpudRider

OK. If your engine is running well, and the bike is shifting well, I believe your engine is in good condition. I did not hear any unusual sounds when I listened to your video; therefore, I don't think you have any problems with your engine.

Spud

OK. Thanks for help Spud!

Im new with this kind of bikes (China) and am looking at them with too much care i guess...Ill just start riding it like i stole it :twisted:,changing the oil and service it regulary and stop to worry about these little noisy demons in its engine

I belive they are good little engines and that they will do many kms if you take care for them. 8)

Once again thank you all for great helpful answers!!!

CASE CLOSED

[SpudRider]

You're welcome, Azriel. Change the engine oil, and clean the oil filter every 1,200 miles (750 Km). Adjust the valve clearances every 2,500 miles (1,500 Km). If you change the oil and adjust the valves regularly, your Zongshen engine will serve you faithfully for many miles.

Spud