Ive never been a yamaha fan, hate 450 maintainence , and they always try to make stuff the hard way. weak clutches, tranny probs, etc. Hondas been the make, even if its been treated like crap, that starts every time. The IRS is what im questioning, and the 500lbs. If they made a straight axle xx with better fuel mapping and shed some lbs it would be perfect. Im on a built 416ex and a yfz450 and im looking at a bb sport quad. Any input would be nice