Piston relief cutouts.

[aiad_78]

I have the 143 BBK from Yuminashi. This is what the piston from the kit looks like -
The guide arrow on the piston points upwards towards the cut, presumably the intake valve... This is the label on the box -


Does this look right? All the pictures I've seen show reliefs for both valves.

One more thing, does anyone know the specs required for a fly-wheel puller? I'm thinking about this set - https://www.amazon.com/Magneto-Flywheel-Spanner-Motorcycle-Scooter/dp/B09THVXN7V/

Thank you

Paul.

Edited for double naming errors.

 

[m in sc]

puller should work, grom uses same one, i had mine forever.

I dont remember what the yuminashi piston i put in looked like . i'd email them and verify its correct.

 

[aiad_78]

puller should work, grom uses same one, i had mine forever.

I dont remember what the yuminashi piston i put in looked like . i'd email them and verify its correct.

Have you ever emailed them?!! They're an utter nightmare, plus their sites down for maintenance, has been for a few days. I have a direct email contact but if I want to be patronized I'll typically chat to my wife because the response time is faster.

I guess I can seat it and see how it fits. I just have this niggling feeling it's not right....

Thanks as always m in sc.

Paul.