250r engine problem

[nitro_nb]

blew up my brothers motor in his 86 trx 250r (busted rod bearings) and was wondering if I could put my 81 250r motor in it for now. any body know if this will work? Got a trip to the dunes soon and can't get if fixed by then.

[GPracer2500]

Isn't the drive chain on the 81' on the opposite side?

[nitro_nb]

you know I think you're right I didn't even think of that.

Thanks