i took around a half inch off i think to put a set of sprung Artic cat forks on one of mine..
the pit bike forks,they r nice,but Very lightweight And the Fork plates dont have enough Meat to drill out to the headbolt size.
well,you could but the strength factor..esp since you gonna be offroading it,like we do.
id say check out what harley has and see if you can move the Lower fork plate Down on the fork legs to fit your headtube..?
or grab a set of something,just choose wisely.
ie,standard top plate,maybe adjustable/plates w allen screw clamps like the pitbikes use,and uses clamps style bars.