Sounds like something is loose in motor

[mad4106]

My bike sounds fine when idling as soon as revved or riding it gets louder and louder like something is loose at the top of the motor it rattles loud im thinking it's the cam chain maybe or valve maybe

[400man]

pull the valve cover and check it out!

[Crosshairs]

^^^^what he said....its gonna be cheaper to fix while its still rattling..:)

[mad4106]

I just hope it's not nothing major

[NacsMXer]

Post up a video if you could.

[Pipeless416]

Originally posted by NacsMXer
Post up a video if you could.

agree. when were the valves adjusted last? are the retaining nuts tight? cam chain tensioner functioning correctly? bolts holding the gear to the cam shaft tight? it could be a number of things.

[mad4106]

it does kind of sound like this youtube link http://www.youtube.com/watch?v=d6QeRQ8QuNwd called 400ex timing chain ticking noise but when idling it doesnt make this noise only when revved up. I dont know but something is wrong my 440 feels like my stock setup which with my stock bore with curtis sparks with 11:1 and stage 2 cam and 450r carb something is wrong and idk why it feels this way im thinking my jet may be too big it is frustrating

[mad4106]

also the head is ported and polished with +1 intake valves so it should be way faster than what it is

[crazya**400exer]

Mine did that and it was my timin chain tensor

[mad4106]

I had bought a new one when i had the rebuilt done too so it must have failed im assuming

[JOHNDOE83]

It deffinetly is not jetting related, unless it was WAY TO LEAN, but then it wouldnt idle very good, you will need "atleast" a 190 main jet for your 440.

Did you ever replace the exhaust header crush gaskets?

They will leak and sound like a tap if they dont get replaced after you have removed the header.

Just a thought.

[mad4106]

I have a 195 in it right now and I haven't changed the exhaust header crush gaskets