My kit came with a "screw tool" but there didn't seem to be any instructions on what to do with it. I got my motor installed and apparently didn't need it.
Crank arm puller
One would think that Mr. Grubee would have sold enough of these $25.00 engines for $150.00 or $200.00 by now that he could afford to pay someone to write a comprehensive assembly and maintainance manual instead of the joke that comes with them now.
I do agree theres a huge need for a clear assembly manual , I've yet to see a novice do a good build using the supplied instructions .
I should have taken some pics of the worst built attempts as a learning tool , seems the translation from Chinese to English manuel's are horrendous , when looking at many installs I felt like screaming , laughing & crying ~ Haaaaaaaaa'''
They should have signed off -Nightmares are us
Bobby.
and if you thought pushbikes were hard, try stepper motors and driver boards that need to be hooked up to a PC....