Suspension help needed, just got a new, kind of odd, bike!!

[my67xr]

Here are some conventional fork's that are 750mm
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If you don't mind doing a bit of reading, check out these 2 thread's, it may help you out a little?
But i'm guessing these fork's will mostly be usd, and heavy too
JAP bikes Fork Tube Sizes, Neck Bearings, axle Diameters - Club Chopper Forums

Has axle size, steering stem bearing size's, fork tube diameter's

This one has fork length's
Fork length Compilation - Custom Fighters - Custom Streetfighter Motorcycle Forum

 

[fourthfloor]

Got to take 'er out yesterday to a local small MX track. She's under-powered and the suspension is even worse than I originally thought haha. Been looking at the works motors from T-Bolt. The Daytona 190cc looks awesome but I'm not sure how that'll work b/c my bike does not have a foot pedal brake or even mounts to put one on since that motor will require a clutch. Anyone know or have the Lifan 141cc Semi motor or know how significant of an improvement it is over a Zongshen 110??