A freind of mine came across a really good deal on a 2007 Yz450f. Bike appears to be in great shape and the price is def right. Only problem is the owner says the transmission is making " some noise" and that it wont go into neutral.. He says other than that the motor is solid. My question is does anyone have an idea what he would be looking at for repairs? I would most likely be helping him out if he were to purchase the bike. I have never really worked on transmissions before but i am pretty well mechanically inclined. I was looking at a set of gears and they go for a couple hundered bucks on ebay.. Would putting in a new set of gears eliminate any problems?? How involved is putting in new gears?? Basically just trying to figure out if he should look further into this bike or stay clear. Thanks.