i'd say it wouldnt be to hard. and imo the 400ex frame is a litte stronger than a R frame cause of the round tubing. and you got some extra room for the motor in the ex frame aswell.
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86' honda 250R woods bike
fresh motor as of sept. 9th 08'
esr trx 5 pipe and silencer
38mm air stryker carb
stock cyl. with 68mm wiseco piston (86')
cr thin head gasket
180psi compression (stock head)
88' hot rods stock crank with spacer plate
vforce 3 reed valve
01 cr250 ignition system
+4 axle
13/38 gearing
durablue lowering strut
maier front and rear fenders
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