I finally got mine the other day. The owners manual says the break in period is 20 hours but I remember reading on some of these post a while ago that you don't really have to do it for that long. I have about 4 hours on it right now and I've been getting on it a little but not staying at high RPM's. All you guys with Raptors let me know how long you broke yours in for. Also my dealer told me that after 4 tanks to bring it back and get the vales adjusted and it will cost $120. Does that sound right. It only cost $80 for my 400EX.

 

Mine said it would run about $60 to adjust the valves.

 

I have had my Raptor for about 2 month's now and I try to baby it but I also belive you should somewhat brake it in like you are going to ride it during the first five hours I rode it easy just gassing it for a little bit but when I was at Tower City riding and a Banshee came next to me I had no choice but to smoke him. I have about 20 to 30 hour's on it now and it run's fine. I don't know what my dealer is going to charge for the first service yet but I will get it done. I have also heard on four strokes you should have your valve's adjusted every year. So i shall doing this also. With this bike being brand new and a new motor design you can never be too careful.

2001 Raptor Blue
GYT-R CHASSIS SKID
GYT-R SWINGARM SKID
GYT-R A-ARM SKID
GYT-R HEEL GUARD'S
GYT-R HEADLIGHT COVER'S
GYT-R SHOCK COVER'S
GYT-R GRAPHIC KIT

 

I paid 60 dollars for the valve adjustment on my raptor at a local Yamaha shop. I was also quoted as much as $110.00 at two other local Yamaha shops. So be careful, and shop around.

I logged 20 hours on my raptor over a period of 3 weekends. Yamaha was probably a little conservative on the 20 hour breakin period.
As for me, I followed the breakin guide in the owners manual.

The rings on this motor will breakin with about 1-2 hours of varied, low rpm riding. The part that takes time is the valve train. New aluminum casting's undergo alot of creep in thier green state. I.E. it takes a little time for the bearing saddles, valve stim guides holes, etc. to stabilize. It's a matter of expansion and contraction of the alloy's involved. It's the repeated cycling of the hot to cold that allows everything to settle. You probably won't wound the motor running it hard after 5-10 hours.
Although you will be putting alot more stress on moving parts than is needed.

The big penilty for hard breakins is down the road for reliabilty/HP of the machine. It is a proven fact that proper breakin will allow the motor to obtain maximum HP, and reliabilty.

Personal Choice.