I don't believe any of you. From what i have seen so far from the 660 Raptor it is killing the 400 ex badly. so you guys can keep yapping about your imaginary wins.

 

Some of these Raptor riders got crap for brains. a modified 440EX Still shouldn't be able to touch a 660 Raptor, but they are. I would race one on my mod. 400 motor and i think i would stay right with with it. I know i can walk away from piped Banshees no problem(been there, done that).

 

it felt great showing mr raptor about riding skills! By the WAY NOT A 440!

stock piston and rings!
lrd pipe and silencer
sparks ignition advance key
uni filter
wb rev box
(as far as horsepower gains)

 

hate to admit it though BUT, did I mention that I found a raptor today and already applied for the loan? Keeping the 400 for my wife (may be selling mods though) Gotta admit the raptor climbed some big hills alot easier than I did...

 

maybe im crazy but youve put more money into your 440 than a stock 660

 

add those bonus ccs to the 400ex and it for sure spank any craptor

 

and the rapter is 260cc bigger

 

that just goes to show you how "powerful" yamaha motors are when they have to add 260ccs to make it faster than the 400

and all it takes is a 440 to beat it! I bet a 416 would too! the craptor is pathetic for it's cc's. Absolutely pathetic. does anybody want to explain to me why it takes that many ccs? because I must be missing something. power transfer must be shi*t.

 

Mag500,

I can understand you being thrilled with the 400ex since you are a Polaroid rider, but you are comparing apples to oranges.

The modded 400s (416, 426, 440 and etc) are race engines with high compression. The 660 is a standard engine with only about 9:1 compression. I don't have to burn race gas and I don't worry about slinging my engine apart like a hand grenade. In theory, my engine should last much longer.

And when you try to belittle Yamaha's ability to produce powerful engines, you come out sounding either very uniformed, or just plain silly.

A stock Yamaha YZ426 produces more horsepower than I've seen anyone claim to have on a modded variation of a 400ex. Yamaha has a long heritage of building powerful engines such as, but not limited to engines found in/on: the V-max, R1, Ford Taurus SHO V-6, RZ family of bikes and including the Banshee, the above mentioned YZ426, some of Yamaha's Personal Water Craft, and the list goes on.

 

just wondering where the raptor riders that you raced 2 yrs old becuse I have a hopped up banshee that my bro was riding and I was riding my stock raptor and we where neck and neck dragging. And the same with his hopped up 250r. we to it to the track and there was a 400 that had some nice mods done to it and I whopped him up everywhere on the track. I think it all comes down to the bike can only carry the rider so far. It's the rider that makes the bike.