I have never had any probs with my BF750. Freakin bullet proof. And I have ridden the crap out of it. Most major thing I had to do to mine is just normal valve checks/adjustments which are a pain but with a K&N filter and precharger, pretty much dont have to worry about valves. They are turds from the factory though. My brothers 06 BF650i would beat it. 650/700 vtwins run wayyy better than the 750vtwins. I bought the 750 cause it had more torque. Plus i could make a 750 beat a 650 with a few lil mods. Advance the timing on a 750, rejett it, put k&n on it and yer pretty much done. Still need to get HMF exhaust though then im all done. I did have to do the steering recall but no biggie. I've floated mine across a pond, buried it in the mud and this thing keeps on goin. Its a tank. With 27inch tires its unstoppable in the mud. I raced mine last yr in Frankfort Ks mud races at 3 different events and our race team took first through third on our Brute Forces. Our team now has 4 750's, and one 650i. They got the ground clearance and the awesome power to get through the mud. We race in the same pit the big trucks go through and we actually get faster times with the atvs compared to the trucks. I work on these atvs at our dealership and i see how they are built. So far I am pleased with how they are made and everything. I mean we get a few weird cases. We had one BF750 come in cause the customer got mud and water in the airbox and it went into the crankcase breather and wore out the rod. Another prob i have seen more than anything is a connector on the right rear of the atv near all the boxes under the seat. for some stupid reason kawi put a connector in there where there shouldnt have been one. The connector would get corroded and then the fan wouldnt work and cause the atv to overheat. Me and 2 of my friends atvs did that. Just had to cut out the connector and solder the wires together. Other than that, very good machine. I aint buying anything but kawis, plus i get discounts from workin at a kawi dealership