Are the bearing carriers still on the kart? does the new bearing caps match the bolt pattern? place bearing caps on the inside if they'll fit, but will work on the out side too(caps together -not on either side of the carrier bracket) -use collars on the inside of the bearing for locking the axle in place, no movement from side to side.The brake drum/sprocket appears to have a set screws w/key. You can assemble all the parts prior to putting on the kart (don't tighten set screws-snug only till you know you're aligned. The bearing holders have a slot at the bottom that allows you to drop the whole axle assembly.Common sense plays a role- as space allows & maintenance needs in the future should dictate your decisions & placements of parts. Spacers or pipe sleeves can be used to simplify the need for constant tightening of set screws and gouging of the axle (not included in the kit). Hope this helps
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