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Speedo Drive


Guest Leaner

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Guest Leaner

Hi all ive recently changed the gearbox on my 2B its a 5 speed . originally the speedo was accurate to within 2mph but now its reading about 12 mph fast i know i will need to change the

 

speedo drive but do i need to replace both the speedo take off and drive cog on main tailshaft or just the speedo drive.Many Thanks . Leaner aka Bernie 8)

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Guest Ian & Carole

All you need to change is the nylon drive gear, the steel worm on the tail shaft IIRC are all the same.

You might be lucky and be able to use the gear out of the 4 speed, just count the number of teeth on old and new.

The hardest job will be getting the steel "dome" out of the tail housing.

 

http://www.ebay.co.u...=item27d219f698 might need to buy a new one.

 

HTHs

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If you replaced a 5speed box with another 5 speed, the opposite side to where the cable goes in, is a top hat (dome), remove it. Inside the box is a plastic gear wheel, it will just lift out. Do the same to the new box and swop them

 

I think there are 3 gear wheels, green, blue and black, each has a different number of teeth, which can alter the revs to the speedo. Make sure the top hat is tight and sealed when you refit

 

If you have replaced a 4 with a 5 speed box you may need any one of the three.

 

HTH jon

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Guest Leaner

Hi all and thanx for your replies iv got the drive out of the old gearbox so if i dont need to change the drive on tailshaft then its an easy job i didnt want to put it in and strip the teeth of it because it didnt match up with the tailshaft drive . So thanks a lot chaps . Leaner aka Bernie

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