z1r head gasket

Hi im new to the site im in the uk and have a 78 z1r in standard trim ,I would like some help on choosing a head gasket ,I have been told to use a one piece and not the oe 2 piece ,to keep the oil in at the cam tunnel ,can any one confirm if I need a 70 or 72 mm can any one help thanks ,david

I would purchase the OEM two piece gasket and related O ring for around the cam chain hole. If your engine is still stock the pistons would be 70 mm dia.

In the UK you might want to contact Z Power.

If it's stock bore it will be 70mm and the one piece gasket you want is made by Cometic , Wiseco or Victor Reinz.
You should join the Z1 owners club GB forum for more relevant info regarding suppliers etc in the UK.
Ray at Debbens , Nick at Suzuki Performance Spares or Grumpy 1260 are all shops in the UK that can supply what you need.

I use a one piece Cometic head gasket on my 1015 Z1. Got tired of the O ring leaking in a short time.
Steve

I would use MLS 1pc Head gasket if you are going to skim block & head on account you need both surfaces smooth no way would I use a 2pc.