you have to have the through axle type so a pit bike wheel will work...
The wheel is actually a custom-built 16 inch double-walled BMX rim with a through-axle mountain bike hub. You could use any wheel and fork setup as long as it is a 1 1/8" straight tube on the fork. You just want the fork, handlebars, wheel, and brake to all be compatible with each other. To do that, you are going to end up replacing all of those and ditching what is on your MX650. I went with the smaller custom wheel to keep the overall height lower. It's actually the stock tire.
[QUOTE=MrKitty;903319]tip any time you buy mt bike forks get a few seal kits as well they go obsolete fast then you cant get parts once this hapends your exspeisve forks become trash becaus of a few 50cent o rings[QUOTE]
Good point, thanks.
[QUOTE=MrKitty;903319]its a very exspeisve mod and i advise anyone thinking about it to price out the parts befor thinking to mutch about it.[QUOTE]
Yes very expensive, if I were looking at cost alone I was probably in it ~$2000 with the original bike, lithium battery, 1800watt kit, suspension upgrades, other misc. Just the fork upgrade you are probably $700-800 to do it right, but you could do it for a bit less. A Sur-Ron I think you can get for a little over $3000, and that is much more of a machine than this. But, building these is what I do for fun. We have a dirt track close to our house and it is a blast. These will go about 2 hours on a charge ripping around a dirt track. No noise to annoy neighbors. With this suspension upgrade I can do a little more jumping.
Attached picture of the track on the previous bike.