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this complete tuning kit allows you to adjust your clutch engagement RPM to match modified exhausts
This the most common 4-stroke 50cc engine found in asian scooters
make sure you get a crank that can stand up to the increased RPMs
Performance piston ring for vintage Vespa Bravo mopeds
Cruciform (4-prong), Vespa SF grips this complete tuning kit allowsReplacement cruciform for 4 speed manual transmission Vespa small frame scooters after VIN 0150203 (ex: late model Primavera and ET3). NOTE: this shifting cross is a bit taller than the earlier model at 51mm. It's integral to have your cruciform in nice condition, so always be sure to replace this when doing a full rebuild.
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