Well heres a fuel injected 660 How do you think it would work on a raptor? XT660X

 

Nice bike, but the very first thing Yamaha says about it is a lie.


Both Cannondale and ATK had supermotards last year

 

If I knew what a superMOTARD was, I might actually understand that point. Unfortunately, that 660 isnt the raptor's engine, its a 4 valve design pushing 48 hp with 10:1 compression. Of course, thats probably at the crank right? The raptor's approx stock figure of 33/35 is rw i think, but with 9:1 compression. Sound like very similar engines.

 

Did someone say it was the raptor motor?

 

Heres your extra valve http://www.dropbears.com/m/models/yamaha/szr6699.htm

 

Heres the dirt version http://www.dropbears.com/m/models/yamaha/xtz660_99.htm

By the way these are 1999 models they have been building these 660's since 1996

 

No, no one said it was the raptor engine. I was just making a comparison.

 

We all know that one day atv's will take the same steps others have already by being sfi from the factory. It may take someone building one and successfully racing it to start the process however.

~HoundDog

 

I realy quirous as to why Yamaha went to 2 intake valves on there new 660 with fuel injection . Must not need the same runner velocity with the injectors