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Fork jiggeypokery

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

Fork jiggeypokery

Postby Scooterlam » Mon Oct 26, 2020 5:51 pm

Italian sx forks onto an indingp frame.
Will it work, gp stem transplanted
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Re: Fork jiggeypokery

Postby Knowledge » Mon Oct 26, 2020 11:59 pm

From the way you describe it, the SX fork stem will still be about an inch too long.

I would be tempted to buy some replacement GP forks and sell-on the SX forks to finance the purchase.
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Re: Fork jiggeypokery

Postby Scooterlam » Tue Oct 27, 2020 8:06 pm

As it happens the SX forks are 2" short, came out of a cut down but have disc links and I have the disc hub
I've got a gp stem to weld on. Just don't fancy all the potential mix and match issues.
Read something in an old scootering about Indian gp bottom bearing cup being different.
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Re: Fork jiggeypokery

Postby Fast n Furious » Wed Oct 28, 2020 12:48 am

You could mess around no end with this only to find it easier, better and cheaper to fit the right forks for the frame.
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Re: Fork jiggeypokery

Postby Scooterlam » Wed Oct 28, 2020 1:26 am

Maybe I should rephrase,
Is there a technical difference between Li series and gp forks other than stem length.
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Re: Fork jiggeypokery

Postby Knowledge » Wed Oct 28, 2020 8:08 am

Other than the push-in buffers of the GP forks and the length of the stem, the forks are the same as Li.
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Re: Fork jiggeypokery

Postby Warkton Tornado No.1 » Wed Oct 28, 2020 4:38 pm

Just to add my two-pennyworth.....

Fork length conversions have existed for decades, usually shortening. The generic design between GP & SI - SIII is identical with variances only in construction of the fork link boots & buffer retention & steering 'stop' lug positioning.

My preferred means of altering the length is by use of an external tube machined to size to provide a tight fit welded into place. The alternative of a bar fitted inside works as well, but needs boring if a speedo cable &/or a hydraulic line are to be used.

To use up forks that have no other place to go, I would have no hesitation in modifying them, given a good standard of competence in engineering & welding/brazing. More so if mates are available that will do so for a pint or two. :D
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