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Pix of my project engine
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Posted by: MXin700R

Well, since Yamaha didnt build this thing like I think they should have Im gonna do it. Gonna make it a true 700cc, 11:1 compression, better intake and exhaust system and while Im at it I ported the head:
http://i60.photobucket.com/albums/h15/Bo_White/IMG_0305.jpg
http://i60.photobucket.com/albums/h15/Bo_White/IMG_0304.jpg
http://i60.photobucket.com/albums/h15/Bo_White/IMG_0303.jpg
My sleeved cylinder
http://i60.photobucket.com/albums/h15/Bo_White/Cylinder.jpg
http://i60.photobucket.com/albums/h15/Bo_White/Crosshatch.jpg
My Wiseco 11:1 +1mm piston(103mm):
http://i60.photobucket.com/albums/h15/Bo_White/Piston.jpg
http://i60.photobucket.com/albums/h15/Bo_White/Sidepiston.jpg
Im gonna run the stock cam for now and break it in and then do some dyno runs with different cams to see whats what. Ive got GYTR header, muffler and intake parts so that it would be at least close to what Yamaha coulda done with this thing;-)

Posted by: Colby@C&DRacing

We just built a std bore 12.75:1 compression with a web cam, HD vavle springs and used the powercommander for fuel managment this raptor runs really strong.

Posted by: MXin700R

Porting the head has got to wake em up, for one the exhaust side is terrible!

Posted by: Colby@C&DRacing

We didn't have time to port this head it had to be done in just a couple of days.

But I was really impressed with the gains with any porting.