Kickstart castle washer for scooters using Minarelli 50cc 2-stroke engines.

This castle washer not only functions as a component for the kick start mechanism but it is also a critical spacer for the variator/ front pulley.

Splines: 17.
Inner diameter: approx 12-13mm.

Important Note:
The genuine original part that this is replacing is Yamaha item 3VLE565700 which has now been discontinued by Yamaha. Note however that the original Yamaha item was 4mm thick but this item is only 3mm thick. It appears there is currently no aftermarket 4mm version available anywhere from any supplier.
For this reason it is important to compare the width of your old one you are replacing to see if it is 3mm or 4mm, if you are replacing a genuine 4mm one with an aftermarket 3mm one you will likely need to use a 1mm spacer washer otherwise this may happen...
www.pedparts.co.uk/blog/variator-fitting-crankshaft-pulley-spline-damage

equivalent to Yamaha 3VL-E5657-00