[z400ACDC]

I have only had my Z for a week and have only ran one tank of gas in it I can hear a knock in the back of the engine. Is this normal. I have not been hard on it AT ALL. It is not that loud but its there.

 

[shortcut]

are you running hitest gas?

Jeff

 

[z400ACDC]

Yes I am running good gas. It's not spark knock. I have ran high comp. on race engines before. This knock is at the back of the gear box at idle. My crapter I mean rapter also had a little noise in the bottom end.

 

[Barely Legal]

I think mine did that for only a few hours and it eventually went away. Right now my motor is quiet and smooth as silk.

 

[z400ACDC]

I live down the road from our local Susuki mechanic. He told me that all the DRZ motors make some noise. How long did you wait till you change the oil.

 

[z400ACDC]

Has anyone had their engine stop knocking after they rode it a while.

 

[dabombdale]

sometimes if the engine knocks it might be the piston, but i wouldn't expect that on a bran new machine.

 

[z400ACDC]

Please post if your Z400 engine has a knock at idle.

 

[Indy]

Motor noises?

This motor makes so many new noises, A slip on pipe will surely cover most motor noises. 8)
Over head cams do make noise
Self adjusting cam chain makes noise
Being a dry sump motor also makes noise

 

[VooDuu Child]

Yeah, it ain't too much to be worried about. I know I was real paranoid when I first got it, but not now. I love this darn thing more all the time.
late

 

[JRide]

I was waiting for some of our group to catch up and I was listening for the knock some of you guys hear and it def. sounds like it is in the gearbox. If you put your Z in gear and let it idle then put it in neutral and let the clutch out you will hear a knock.

 

[Z400 rider]

it may just be when a motor breaks in, you will see metal shavings in your oil, maybe one of those got stuck in a gear and it just has to waer down.

dave

 

[Quad God]

I would take it to the dealer.Just my $0.02. :wink:

 

[shortcut]

I get a knock at idle in gear,but i think it's gear lash.I changed my oil after
the first hour and had a bit of metal on the drainplug.I changed it at 5hrs
and had less metal and noise,getting ready to change it again and see.

Jeff