Does anyone here have one? If so what kind of maintenance does the machine need and how often? How durable is this quad? I know some of the more race orientated motors require alot of maintenance and I want to know if this machine is one of them? Thanks in advance!

 

yep both of them are "race" motors that need quite a bit of maintainance

 

check the sport quad section.i've ask a similar question about the 525.it's about the same as all the sport quads like the 450's etc. from my understanding the valve adjustments only take about 30 mins start to finish and it's not that hard to do.