2004 arctic cat 400 4x4 motor knock?
 

i have an AC 2004 400 4x4, when i start it up i hear a knock in to low end of the motor. unsure on what it is i have been told its a valve and or timing chain issue. HELP!!!

Is the knock in synch with the RPM of the motor (i.e. does it get faster as you give it more throttle)?


Can you narrow down exactly where the knock is coming from (shade tree mechanic way is to find a length of solid metal tube (dowel), place one side on motor & other on engine...move around until you hear the knock loudest)?


Someone told you valves...but you say the knock is coming from lower part of motor...that doesn't make sense...try to isolate is you can...

Yes the knock is in sync with rpms

Any chance you can post a vid with sound? If it's more of a ticking then it's valves/lifters, a true knocking will be crank/rod related.


This is an auto...correct? I'd pull the clutch cover and run it again...hoping it might be your primary clutch vs. a motor issue...the primary spins on the crank so I'm hopeful it's that...

I think it's the clutch. A bottom end rap/knock might get louder as the oil heats up. Those old Suzuki Motors are just about bullet proof.

I hope so...

It's also a manual