You should get one of those trail tech mini tachs and see what's your max rpm is with your current set up and then drop spindle size and see if you can get a higher rpm, the 1in spindle might just be too much load.
@@rabbitfootedkitty1339 definitely possible, but a tach is nice especially when fine tuning the carb or dialing in the clutch, when you start getting over 13k rpm it's hard to tell the difference in a few 100rpm, I got one they are not very good at giving fast readings but they are good for recording peak RPM in a pass, it's nice when you can make a run, turn the mixture screw a bit and then make the same run and see the difference in RPM it's a better way to get a good tune.
V brake forks from coastped complete trash would not recommend, stick with stock fork. The bearing size on the coastped fork is something very strange that definitely is not Goped.