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Z1a (August 73 build, USA)
Posted: Sat Dec 29, 2018 2:27 pm
Author: Adrian90s
Hi guys,
Need a little help if at all possible.
Starting on the rear of my bike, after the humour of getting it on the centre stand.
Rear wheel off and at once noticed 3 stalks on the rim, one being the tube inflator, what's the other 2?
What date is the rim or is it now scrap with 3 holes in it?
The hub lining has a max, once again scrap if exceeded?
Do you change the rubber crush bushes as a matter of course?
Re: Z1a (August 73 build, USA)
Posted: Sat Dec 29, 2018 2:36 pm
Author: Adrian90s
Wrong side of wheel hub....
Re: Z1a (August 73 build, USA)
Posted: Sat Dec 29, 2018 2:45 pm
Author: engz1b
the other 2 stalks on rim are for wheel rim locks,
Re: Z1a (August 73 build, USA)
Posted: Sat Dec 29, 2018 3:08 pm
Author: Adrian90s
What's a rim lock? Is it a 1975 rim also?
Thanks
Re: Z1a (August 73 build, USA)
Posted: Sat Dec 29, 2018 3:39 pm
Author: Garry.L
Adrian90s wrote:What's a rim lock?
Thanks
They're to stop the awesome power of the 903 motor from spinning the wheel rim inside the tyre...
Re: Z1a (August 73 build, USA)
Posted: Sat Dec 29, 2018 3:45 pm
Author: Adrian90s
Rim locks...what are they connected to inside the tyre?
Re: Z1a (August 73 build, USA)
Posted: Sat Dec 29, 2018 4:02 pm
Author: 8 Valve Mark
they're held in place by the pressure of the inner tube against them and the nuts you can see on the wheel rim . they're like this..
1546099194156172466464.jpg
Re: Z1a (August 73 build, USA)
Posted: Sat Dec 29, 2018 4:04 pm
Author: Adrian90s
Thanks for that..is my rim original to the bike?
Re: Z1a (August 73 build, USA)
Posted: Sat Dec 29, 2018 4:18 pm
Author: 8 Valve Mark
i think the code is a feb 75. someone will confirm or correct this......
Re: Z1a (August 73 build, USA)
Posted: Sat Dec 29, 2018 4:35 pm
Author: Adrian90s
Many thanks...no good for my 73 bike then. Anyone got a 3c-f to swop?
Or I can sell the rim, no rust on the rim...or the bike come to think.
Re: Z1a (August 73 build, USA)
Posted: Sat Dec 29, 2018 4:40 pm
Author: Philippe
Hi guys
all said above is correct to my best knowledge. The two extra holes in the rim are for the tire grippers, 5B is the date code: februari 1975.
Max 200 mm states the maximum diameter of the space for the rear brake . The interior of the hub has a steel lining. If this is worn out you can't use the hub in a safe way, it could crack when it's hot due to the friction of the brake shoes when applying the rear brake.
So don't worry, I never saw a worn lining on a rear brake. Remove the rust and use new brake shoes.
GrtZ
Philippe
Re: Z1a (August 73 build, USA)
Posted: Sat Dec 29, 2018 4:59 pm
Author: Adrian90s
Many thanks Phillipe,
As usual a clear answer, can I reuse the 6 rubbers?
Thanks
Re: Z1a (August 73 build, USA)
Posted: Sat Dec 29, 2018 5:30 pm
Author: ZedHead
Adrian90s wrote: can I reuse the 6 rubbers?
If they fall out of the hub they are worn and should be replaced.
Re: Z1a (August 73 build, USA)
Posted: Sat Dec 29, 2018 5:35 pm
Author: Adrian90s
Only when I bounced the wheel off the ramp did 2 fall out.
Re: Z1a (August 73 build, USA)
Posted: Sat Dec 29, 2018 5:35 pm
Author: gpjes
The cush drive rubbers ,if they look ok you can reuse however if they've got lumps off treat to new, though can be a right beeatch to get wheel back in when new
