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The earlier aluminium flywheel is no longer available and has been replaced by a slightly heavier steel
flywheel. These new flywheels weigh approximately half-way between the Aluminium Ducati electronic flywheel and the original AF electronic flywheel.
Gearbox Assembly
We would normally recommend a gearbox with a top gear ratio between that of a GP200 and that of an SX200. This is all dependent on the set-up and body work used. We like to run an Indian or Italian GP gearbox with a 19/46 drive, as the large front sprocket gives an easier time to the clutch and chain - a potential weak point on a tuned Lambretta.
We would normally use a race specification Regina chain, although a Renolds chain is a good substitute. The use of a top chain tensioner support or a top tensioner replacement unit such as our own special cast alloy type improves reliability.
Note! It is not unknown on tuned motors for the top standard chain guide to bend/distort and break under the load. We also use a special heavy duty selector spring which further improves Gear Selection and gives a more positive change.
Clutch Assembly
Most Road motors can use a 4-plate clutch with our strong springs. If there is room in the clutch basket, we would use a New-Fren 5 plate clutch. It is now possible to modify the cast clutch basket sprocket to enable a 5-plate clutch to be used. If a tuned motor and/or our exhaust is used, a New-Fren 5-plate clutch assembly will prove more beneficial with the very high state of tunes.
Cylinder Heads
For use on 205 kits, we have found the best sidesquish head to use for modifying to high compression is the genuine Indian GP200 head. The cylinder heads from India are considerably thicker than any previous Italian ones and minimise distortion when modified.
For the ultimate in performance, a central plug type cylinder head is available. This will complicate the fitting and removal of the spark plug, but if it is performance you require then it is advantageous to use it.
Note! There are some poor quality Spanish and Italian pattern heads with large volumes around that are not suitable for skimming.
Japanese Small End Bearing
This is required to withstand high RPM use, helping to stop the cage from shattering when ridden very hard - which is not unknown when standard or poor quality bearings are used.
flywheel. These new flywheels weigh approximately half-
Gearbox Assembly
We would normally recommend a gearbox with a top gear ratio between that of a GP200 and that of an SX200. This is all dependent on the set-
We would normally use a race specification Regina chain, although a Renolds chain is a good substitute. The use of a top chain tensioner support or a top tensioner replacement unit such as our own special cast alloy type improves reliability.
Note! It is not unknown on tuned motors for the top standard chain guide to bend/distort and break under the load. We also use a special heavy duty selector spring which further improves Gear Selection and gives a more positive change.
Clutch Assembly
Most Road motors can use a 4-
Cylinder Heads
For use on 205 kits, we have found the best sidesquish head to use for modifying to high compression is the genuine Indian GP200 head. The cylinder heads from India are considerably thicker than any previous Italian ones and minimise distortion when modified.
For the ultimate in performance, a central plug type cylinder head is available. This will complicate the fitting and removal of the spark plug, but if it is performance you require then it is advantageous to use it.
Note! There are some poor quality Spanish and Italian pattern heads with large volumes around that are not suitable for skimming.
Japanese Small End Bearing
This is required to withstand high RPM use, helping to stop the cage from shattering when ridden very hard -
