Hi RBY
standard tire sizes are: front 3.25 x 19 , rear: 4.00 x 18 speedindex: V
both have inner tubes and the rear wheel has two tire grippers.
GrtZ
Philippe

Hi Derek
if you want to see them in reality, you know where you can find me, just give me a call.
GrtZ
Philippe

Hi guys I ws tempted last thursday by a GpZ1100 Uni Track and I bought it...along with it came a donorbike so now I have two GpZ1100 . Where will it end? Some pictures, enjoy them. This is the one that cought my attention. DSCN3967.JPG DSCN3968.JPG And this is the donorbike DSCN3969.JPG DSCN3970.JPG...

Hi Adrian
very nice preserved BMW! Congratulations.
Not my brand of bike but a classic anyway.
GrtZ
Philippe

Hi Bill the double disc brakes on a Z1 were both thick, not like those of the Z900A4 or Z1000. As a matter of fact, the twin disc on a Z1, Z1A, Z1B was an option, a single disc was standard. The right hand side disc was the same as the left hand side disc. It had the same dimensions. So any Z1 disc ...

Hi Gary
welcome to the club!
Nice bikes you have there down under. A beautiful Z1B and a rare original Katana.
Keep them in good shape and enjoy them.
You see: it's never too late for a happy childhood!
Greetings from Belgium
Philippe

Hi Greenmamba I have no idea if that one would work but I know for sure that a fuel level sender of a Z1000ST works, I did put one in the small tank of my Z1R. You only have to bend the metal rod a bit to make it indicate the fuel level more or less correct. Mind that the six little bolts have a spe...

Hi Gary was the valve stem grinded off too much? If that's the case, the bucket pushes on top of the two collets and not on the valve stem. In that case, grind off the two collets so that these sit lower than the top of the valve stem. Or replace the old valve with a new one. Make sure you have the ...

Hi Derek
I know there are hard to reach places on a bike ...do you get better acces to those by hanging the bike upside down?

No kidding, you're making progress, looks very good to me! Go on like that.
GrtZ
Philippe

Hi Derek the drain screw of the Z900A4-Z1000A1 should be at the deepest point of the fork leg. The two holes to fit the caliper should be at the front. As you stated in your message, you have two different fork legs, a left hand side Z1000A2 and a right hand side Z900A4. It's not only the outer legs...

Hi Laurie that looks like a very nice bike! Why would you change the front brake master cylinder? Replace the piston, clean the brake calipers, add new brake fluid and the problem with the brakes will be solved. It's normal that the brakes are seized after standing a lot of years. I have no experien...

Hi Derek
don't give up now! you can do it! act as zedhead wrote, the broken stud will come out in the end.
GrtZ
Philippe

Hi Mick welcome to the club! I hope you can escape from the floating Alcatraz and find a Z900 to ride. Changing a camchain is indeed a "cranck out" job if you want to do it correct and change not only the chain but all the other parts as wel. When you bought one, just show us some pictures...

Hi gmat welcome to the club! A great '73 Z1 you have there. As you mentioned, a late production bike but with all the correct date stamps! One point yu need to look after: the gaskets between the rubber intake manifolds and the cylinder head: remove them and replace the old rubber inlet manifolds. N...

Hi GreenMamba good luck with the project! A lot of work but a very good starting point. Almost all the parts are there. The Z1R uses the same rotor as the Z1000A2, it's the one without the woodruf key. The carbs you have are most likely from a Z1000 St or MK2 (the vacuum port on the third carb). The...