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series 3LIS forks front wheel out of line problem

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

Re: series 3LIS forks front wheel out of line problem

Postby CHRIS in MARGATE » Fri Dec 19, 2014 11:51 am

If the wheel spindle is true then you need to establish that the fork links are higher /lower one side or the other by getting the scooter perfectly level on level ground and measuring the distances of both fork links.
Have you changed the rebound rubbers and are they the same size?
It is practical and safe to add spacing washers to the tops of the rods to adjust because sometimes the top hats can sit higher/lower. It is not normal but it's not unusual.
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Re: series 3LIS forks front wheel out of line problem

Postby grandpa » Fri Dec 19, 2014 2:29 pm

Hi grumpar,
Make sure the top hats are seating fully by tapping them in gently then measure.Assemble the fork links as per picture and check if they are square and equal. Check the depth of piston rod recess in each forklink to see if same. My fork links(Indian) needed grinding to square them up.
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Re: series 3LIS forks front wheel out of line problem

Postby grandpa » Sat Dec 20, 2014 4:01 pm

Hi grumpar,
Forgot to mention that I would be inclined to assemble forks without springs and check for any binds caused by forklink bolts or bent piston rods
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Re: series 3LIS forks front wheel out of line problem

Postby Wack » Sun Dec 21, 2014 12:29 am

When you say out of line , do you mean the wheel is tilted or the whole hub is off centre?
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Re: series 3LIS forks front wheel out of line problem

Postby monument7 » Sun Dec 21, 2014 12:44 am

Probably a daft question but what was it like before you took it apart. Could have been assembled wrong previously
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Re: series 3LIS forks front wheel out of line problem

Postby Wack » Sun Dec 21, 2014 6:51 pm

Firstly I would remove the links then try to pass a 12mm round bar thru the pivot holes,if it wont go thru both fork boots then there may be a problem with one of the fork legs being bent .Then with some spacers ,bolt the links together and check the bump stop faces are level with each other,the axle eyes are level and parallel to the pivots and the inner faces of the axle eyes are vertical to each other.Very often you may find one link is twisted so you may need to tweek it a little to bend it back into line.If the links and forks check out then the only alternative may be to grind a little off the lower bump rubber on the higher side to let the link sit lower or you can file the axle washer on its outer edge about a 1/4 of the way around which allows it to sit higher in it's rebate lifting the axle up a fraction.
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Re: series 3LIS forks front wheel out of line problem

Postby CHRIS in MARGATE » Sun Dec 21, 2014 9:58 pm

Well done.. You stayed with it.. Just goes to show assumption is the mother of all evil. Not a matching pair of links: aghhh !
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