Z1OwnersClub GB

just set valve timing.with cams set i cant get it to spot on TDC.on one tooth it is retarded on the next tooth its abit advanced.Ive set it to the advanced as this is closest of the two.
Anyone got a view on this

I'm assuming it's a 900 we're talking about here ?
Do all the timing marks line up when the crankshaft is rotated ?, i.e. the "T" mark on the advance/retard mechanism, the two lines on the exhaust camshaft with the head & the 28th pin on the cam-chain with the arrow on the inlet camshaft ?
I seem to remember when doing mine everything lined up pretty much.

get the T lined up.
Cam chain tight at the front.
Exhaust (Front Cam) lined up with the mark level with the head with cam chain tight at the front.
count to 28 link pins and line up the inlet cam.

bolt down cam caps
bolt down cam chain top guide
release cam chain tensioner

now slowly rotate by hand 360 degrees to T mark.
check all still lines up again.

Thanks for replys.
have set cams correct.its not possible to get tdc as well.it about harlf a tooth out.the tooth on the cam lines up with the roller on the chain when its at tdc

post a photo and lets have a look.........

The marks rarely line up perfect with the head surface.
Mainly down to a stack up of machining tolerances and camchain stretch.
Will run just fine though.
To get it perfect you need some slotted sprockets and degree them in.
You might notice it runs a little crisper and stronger with that done (mostly psychological probably ) depends how far out it is a the moment.

zed1015 wrote:The marks rarely line up perfect with the head surface.
Mainly down to a stack up of machining tolerances and camchain stretch.
Will run just fine though.
To get it perfect you need some slotted sprockets and degree them in.
You might notice it runs a little crisper and stronger with that done (mostly psychological probably ) depends how far out it is a the moment.

Totally agree with Rob. Don't worry too much and enjoy the ride

this is the tdc,cams spot on


thanks for help

Would have been better to have a pic of the cams when the 'T' mark is exactly in line with the case mark to give a definative opinion.
Appears your cam timing is slightly advanced though which is opposite of the usual retarded due to camchain stretch etc.
Higher deck height, thick gaskets etc will cause this.
Will still run ok though.

zman wrote:this is the tdc,cams spot on


thanks for help

Is this with the cam chain tensioners in place or not fitted?

yes fitted

is the cam chain on the crankshaft properly that is a few degrees out .

hillbilly wrote:is the cam chain on the crankshaft properly that is a few degrees out .

Would be half that at the cam sprocket though.
Pic of cams needed with tdc marks aligned.

What the lads say, get the 'T' mark spot on and then photo the cams.

Bit of a sidetrack here, might be better to know exactly what engine you have 900/1000?
Someone on here will be able to tell you also if the advancer is correct, I have been degreeing my 650 cams today and used a positive stop for the piston and a degree disc to work out TDC, but while having my pistons at TDC on 1 and 4, I put on an advancer to see how accurate the factory 'T' mark was, turned out to be off a Z1000 and it did'nt line up when pistons were at TDC, I then found one I took off a 650 electronic ignition type that was running a Z750 top end , that did not line up either (turned out that came off a Z400 J model).
If the 005 is right, then I think your cams are both advanced a tooth.

What's the history of your engine? Have you just re-assembled it, had any work done on the crank etc etc That T mark should be much closer to the mark. Is that an OEM points housing.

We need to see images of the camshafts.

TDC is TDC and the pin in the end of the crank is pretty accurately positioned so I'd be a tad worried about this..

Mike