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Could someone tell me if all looks ok in these here pics ...got the bike running today and runs a lot better after cleaning out carbs ...i'm just trying to identify a rattle wich was coming from the area of pics. cheers in advance..

got a little clip of the rattling appologies for vid quality as it was taken from a crappy old phone....
http://www.youtube.com/watch?v=ZY7wO1QB79w

Cam chain tensioner?

Dunno if it's the vid or my memory, but that actually sounded about normal for a ZXR400 to me. You should have pulled the clutch in so we could hear the difference with that...

What rev's was that ticking over at? Sounded a bit low so your getting chain "slop" from the cam chain, should sit around 1250 rpm. Don't be shy to turn up as much as 1500 if it makes it sound better - as long as the bike doesn't "clonk" into gear doing so!

If the motor has done 25K+ miles then the chain could be on its way out and the tensioner is at full load, if the noise becomes louder while driving it is fooked and you need to address it ASAP. If it shut's up it's more likely the above.

MM!

cheers guys
pulling in the clutch only makes a difference when i have had it in gear as i then get another noise which stops when i pull in clutch .....
tick over is sitting at about 1000 rpm so i will turn it up a tad......
bike has around 35k on the clock but someone told me that u should never have to change the cam chain how true that is i don't know..

would it be worth changing cam chain and tensioner and if so is this a tricky job for Rob to do

carlingboy wrote:would it be worth changing cam chain and tensioner and if so is this a tricky job for Rob to do

Oooooooooh yes!

at that mileage i would change chain b4 it snaps,

but it dont sound too bad in comparison to a lot of other zxr400s

gem

Hi,

Idle is suppose to be at 1200rpm +/- 50rpm.

Tip: Make sure the bike is fully warmed up before setting the idle, warmed up as in the temp gauge reading half just about when the fan kicks in. Any tuning to carbs must be when the engine is warm.

Does sound like cam chain slap to me. If the clutch is pulled in and the rattle doesn't get any quiter, I would start with simple things first.

Reset the tensioner, clean etc...

Then go from there.

Regards

Rich

Does sound like cam chain slap to me. If the clutch is pulled in and the rattle doesn't get any quiter, I would start with simple things first.

Reset the tensioner, clean etc...

Then go from there.



simple things ......reseting the tensioner is that sumin a simplet like myself could do by following a thread somewhere is is it a specialised job cheers....

Hi,

Try this thread

viewtopic.php?t=7515&p=60464#p60464

Regards

Rich

Well i had a listen today and its about as normal as a ZXR gets. We found that the ticking was the fuel pump trying to pump nothing because the fuel tap hadnt been turned on (isnt that right mark ).

It bogs when you give a a handful too so a dyno session will sort it

Otherwise its all spot on.

I left the fueel tap of to test your knowledge rob
Glad u agreed she sounds good as i need to get on it cant wait but wont be till next month i dont feel so .....
Felixtowe here we come hope u like cockels Rob lol

you hope i like what?

oh, cockels

phew!

Just fish and chips for me cheers!