how reliable have your yfz 450's been? what problems have u had?
have there been any comin problems that happen on them since this is there first year out????

thanks
joe

 

The only thing I have seen personally ( & this goes for the YZ 450F,s also ) is that there is a little black plug about the size of a dime on the front of the head that can & will fall out .( I carry 3 spares in my toolbox) When it does, motor oil will get all over the exhaust header & motor. This little plug is used to plug the hole where a manual compression release shaft would go if the motor used one. The YZ 426 & 250F 2002 & older used this setup....why Yamaha still has the hole now baffles me because the head is an all new design & doesn't employ a manual de-compression setup.

 

i havent' had that problem as of yet... however I did get something like a hose, or something else rubber that was picked up and got caught behind my front sprocket. It burned the seal right out, and I leaked oil all over the place. Luckily, the dealership still covered it under warantee, and fixed it for free.

 

Coolant Leak.

Fixed in 25 minutes.

 

Thx for the tip Frooo. Will have to jet down to the dealer and pick up a few.

Plad