Engine Mechanical TopicsDiscussion for motor builds, cams, head work, stripped bolts and other engine related issues. The good and the bad. If it goes round and around or up and down, post it here.
Looking for the difference between the 103 a and b motors. I have the chance to get a low mileage 103 engine. If it wont fit my 2012 SG I dont want it. Is there a quick visual check to know the difference?
the B motors are solid mounted (softails) and have internal balancers.the A motors are rubber mounted (touring & dyna models)and don't have the internal balancers.the motors are very easy to tell apart visually and are not interchangeable (if you have a street glide,yours is a A motor)
Last edited by prodrag1320; 09-06-2014 at 04:43 PM.