the rear diff on my 87trx250 took a crap i was wondering if anybody knows whats interchangeable im pretty sure a big red atc 250 rear is the same but what about the bigred200? or the newwer Recon rears they look alike ? how much would i be looking at if i was to buy new ?

 

It might work why dont you check on google about that.

 

Try to get the part numbers off of a honda oem parts site and see if the numbers form other quad match yours.