Hotrods has come up with a very good stroker crank for the warrior/rap350. It only has a 7mm stroke, but still strokes the motor up to 396cc. This setup requires no machining, has a much stronger rod, much stronger bearings, runs on 10.5 compression, and will rev up quicker than the other kits out there. The only downside is the piston is a raping 250, but the total for the parts is still only 650, very cheap compared to machining the stock crank. A stronger rod and bearings is a must if your gonna go apeshit with mods, which hardly anyone makes for the warrior motor nowadays. Check the **** out:
http://www.hotrodsproducts.com/index.cfm?fuseaction=cProducts.view&productid=124
http://www.hotrodsproducts.com/index.cfm?fuseaction=cProducts.view&productid=124