Wolverine said:
The problem, I am having with my friends 450YFZ is that every time, I beat them they :'( you got a 700 and we got a lil 450.
well, there "little" 450 has more technology and R&D thrown at it then our 700's could ever hope of having. Yamaha has been working with that motor since 98, and they have a lot at stake with that motor. Its there racing motor!
The 700 motor hasnt had the same attention thrown at it...obviously....when a "little 450" makes the same hp as a 700cc engine. That says a lot about these 450 engines...making that much power with that much less cc's.
HOWEVER, if you or your trusted racing shop wants to throw some attention toward the 700 motor, they can be made into beasts. 450's wont be able to touch them in a drag...not without power adders like turbo or alky/nos.
Once you mod the 700's motor its all over. Yeah...they are close with equal mods but you do anything to the motor and the 700 will start walking.
I have a 450 (yfz) and I ride with them all the time. With my setup and knowing how to shift and put the power down on these 700's, the 450's dont stand a chance. We race them all the time....and we have raced my yfz against our 1st 700.
even though the yfz has a better power/weight ratio....and is pretty much even in the HP arena both stock and with bolt ons...they DO NOT have the torque nor can they as efficiently put the power to the ground (atleast where we ride).
I was on the other side of the fence for a long time on this. I was such a Devout 450 rider, it wasnt even funny. I had my 450 tuned up pretty much as far as you could take a stock bore, without going to power adders.
Well, I tuned my yfz down for selling purposes and sold pretty much all my parts to my buddy. I have more of his motor on my quad than I do of mine. Its down to cammod, gytr clutch, fresh stock 11.9.1 piston, spot on jetting using the yz needle, WB intake w/o lid, stock exhaust with cork removed and various weight saving parts made of aluminum. This quad will still hand a stock 06 450 its ass, so its running strong. We ran it against out 1st 700 (ladies) bone stock, show room condition. Absolutely nothing was touched on the 700. Raced on asphault and it was 50/50 out of the hole, and the 700 ALWAYS passing by third if it didnt get the hole shot. After riding them back to back and racing several times, switching riders and getting the same results I went to the other side of the fence and purchased my own 700!
I ride with another friend that has all bolt ons on his 05 yfz, vs my all bolt ons 06 700. 700 walks him every time. Gets embarrasing at the end of third and into 4th! :thumbsup:
............you made a good choice with your machine, dont worry about that :thumbsup: