Z1OwnersClub GB

I have one valve which regularily needs reshimming twice last year, all the others were fine. This one is tight again today after 900km`s. The head will have to come off as thats the smallest shim fitted now. Gaskets and bits in the post. But what do we think is going on a receeding valve seat would seem the most logical

Sounds like a valve seat to me, unless the valve is wearing out instead.

Exhaust or inlet? possible valve is just being held opon a bit causing burning of seat?more likely on exhaust valve.Sound like you may need new seats or even have the valves "tipped" if you are on smallest shims!

As Paul says..... think you can have 0.3mm trimmed off

kev edwards wrote:Sounds like a valve seat to me, unless the valve is wearing out instead.

Hi Kev guess i will find out soon The cam cap fix i can report is still holding How you getting on with the XS

PAULJAC47 wrote:Exhaust or inlet? possible valve is just being held opon a bit causing burning of seat?more likely on exhaust valve.Sound like you may need new seats or even have the valves "tipped" if you are on smallest shims!

An inlet Paul compresion is good i guess i will find out once im inside. Im only on the smallest shim on this valve all the others are mid shim range as this one was before suddenly needing reshimming 3 times with only low km intervals

Pigford wrote:As Paul says..... think you can have 0.3mm trimmed off

Could well be Piggy who sells the height gauge tool thing, might be a good idea to buy one save me having to run around and try to borrow.....

Nice to know the cap fix is still going strong, how many years has it been running with it now?

kev edwards wrote:Nice to know the cap fix is still going strong, how many years has it been running with it now?

Im not sure Kev must be about 3 years though