Crank Flywheel Key (woodruff key for Flywheel)

correct size for crankshaft

size is hard to find in mm,; 4 wide x 5.5 tall x 15-16 long

seems to be custom made or vire, is not one you can find online elsewhere

usually i take a std 6.5mm tall one and file it down 0.5-1mm lower to be a nice fit allowing the flywheel to slide on and off nicely.

if i am out of stock ask if i may send you one 6.5 tall you will have to file/sand/grind down 1mm to fit.

easy install, if its not loose fit, then it will need pressing in with a pair of pliers, or tap in carefully with small hammer. to remove the old one, you might want to drift it out with a 2-4mm pin on the end or carefully use a blunt chisel under its front lip.

press on/off the flywheel with correct technique, see youtube 'vire flywheel removal' or as instructed in manual. 

Important - do NOT lock the flywheel stationary during tightening, as it will break this part.(usual reason it failed). correct technique as per manual is to hammer a spanner around, and let the crankshaft inertia prevent it turning instead.