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pm tuning forks width

Technical help for Series one, two and three Lambrettas. Models include the Li, Li Special, TV, SX, GP, Serveta and API/SIL models

pm tuning forks width

Postby gizmo » Mon Feb 03, 2020 10:58 am

advice more than welcome. Fitting a set of the pm tuning forks with their single anti dive disc. Cannot centralise wheel. Tight up to links on caliper side with no spacers and 30mm gap to fork stem. Other side 5mm of spacers but only 20mm gap. Obviously great if wheel needed to come that way but it does not. I have had same set up before and had no issues. Any ideas. The forks are wider between the legs than an innocenti pair I have
Last edited by gizmo on Thu Feb 06, 2020 8:12 am, edited 2 times in total.
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Re: pm tuning hub and disc

Postby Warkton Tornado No.1 » Mon Feb 03, 2020 1:49 pm

Regardless of the fork manufacture, the links, rebound rubbers (if fitted, which they are not always, as in some race machines) & springs/fully extended damper length all need to be pairs.

That said, even after build, checks should also be made with rider seated.

Finally, if using SIP rims (the safest that I am aware of due to their hub centralising design not relying on four M8 studs!) do be aware that they offset the wheel IMO.
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Re: pm tuning hub and disc

Postby gizmo » Mon Feb 03, 2020 5:03 pm

Warkton Tornado No.1 wrote:Regardless of the fork manufacture, the links, rebound rubbers (if fitted, which they are not always, as in some race machines) & springs/fully extended damper length all need to be pairs.

That said, even after build, checks should also be made with rider seated.

Finally, if using SIP rims (the safest that I am aware of due to their hub centralising design not relying on four M8 studs!) do be aware that they offset the wheel IMO.

I am using sip rims. No internals as outboard shock set up with all parts from pm tuning
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Re: pm tuning hub and disc

Postby gizmo » Wed Feb 05, 2020 9:32 pm

Managed to get it nearly there but with a 10mm spacer at one side. These pm tuning forks are 7 mm wider between the fork legs than an innocenti pair I have
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