Fazer Owners Club - Unofficial

Bikes, Hints'n'Tips => FZS600 Fazer => Topic started by: mechanical music on 23 June 2023, 07:56:53 pm

Title: cylinder 3 much lower compression
Post by: mechanical music on 23 June 2023, 07:56:53 pm

why does the 3rd cylinder show low compression (70 psi) and the others are good (200-210 psi) on 2 different mk1 600 fzs engines all are cold readings as engines are not in bikes

Title: Re: cylinder 3 much lower compression
Post by: BBROWN1664 on 24 June 2023, 09:23:29 am

put a bit of oil in the cylinder to see if its a sticky/knackered ring.
Could be dirt/crap stopping one of the valves sealing properly too.

Title: Re: cylinder 3 much lower compression
Post by: Gnasher on 24 June 2023, 03:58:50 pm

It could also be you've got a valve/s not fully seating. 

Title: Re: cylinder 3 much lower compression
Post by: basher on 02 July 2023, 09:40:48 pm

for me its cylinder 4 is really low, I suspect rings are worn but I wont bother replacing the pistons until winter