hey gang,
got a 93 honda fourtrax and the bearings on both side of the swingarm (think that is what it is) are bad. i can't get to the bearings due to an allen head bolt on both sides and i need to know what size allen wrench to order. can you please let me know the size i need?
if you are unsure as to which bolt, please look at the following link:

1993 Honda TRX300 FOURTRAX OEM Parts, 1993 Honda TRX300 FOURTRAX OEM Replacement Parts - BikeBandit.com
simply click on suspension, then swingarm, and its the bolt #18. thanks so much!!!!

 

Just measure it accross the flats. In other words, flat to flat. It's more than likely metric. To convert an inch number to metric, multiply the inch number by 25.4 and you'll have the correct metric wrench size. So, let's say it measures 5/16 inch. Multiply .312 x 25.4 and you get 7.92. That's 8mm.

 

17mm