Z1OwnersClub GB

Having acquired a 79 Z1000 A2 last year I only recently tried the steering lock - Understand the same key should kit all locks on bike - The key (I only have one) fits ignition and seat and the 3 digit no is the same one as stamped on the grey face of the steering lock key barrel too so is correct - Seems the key goes in so far but not all the way - I have tried WD40 but no luck so far and don't want to force it as its my only key - Any thoughts/help would be appreciated - Cheers

My A1 has a different lock for the seat and the ignition it's been in the family since it was a year old and none of us ever changed it, so there's a good chance it's always been like that.

Often the cylinders can become clogged up inside with dust and dirt. First thing to do is stop using WD40, never use it on any cylinder, it mixes with dust etc and forms a sticky paste. To get the muck out use Carb Cleaner, you'll know it's working as the liquid coming out should be filthy. Follow that up with generous sprays of Silicone release spray and keep working the key in and out.
Once it's able to go fully home try turning it with LIGHT pressure and if it will not go keep on with the Silicone, if it will still not go after a couple of days a bit of heat will often work. These pics are of an H2 lock and you can see the heat melted the dirt/dust etc. once moistened with the Silicone spray.
Good Luck

thanks for advice all - Appreciated