ATV Florida Forum

General => Racing Scene => Topic started by: Paul_S on September 05, 2006, 05:57:39 PM



Title: New Raptor 660 modifications
Post by: Paul_S on September 05, 2006, 05:57:39 PM
I just got a new (new to me) 2002 Raptor.

It has a pro flow intake and a supertrapp exhaust system.

It runs awesome with the choke full on, push the choke in and it misfires and runs very rough.

Any suggestions?


Title: Re: New Raptor 660 modifications
Post by: Hoosier Daddy on September 05, 2006, 06:11:03 PM
its lean.... 


Title: Re: New Raptor 660 modifications
Post by: Paul_S on September 05, 2006, 06:15:18 PM
its lean.... 
Thats what I was thinking, is adjusting the mixture on twin carbs pretty easy for an idiot like me to do?


Title: Re: New Raptor 660 modifications
Post by: tony pitts on September 05, 2006, 08:19:10 PM
before you go adj anything make sure your choke isnt froe up in the carb it is very common on the 660 raptor it gets corrosion inside the choke housing and deteriates the spring for the choke the fix is to replace the choke starter valve system.


Title: Re: New Raptor 660 modifications
Post by: Paul_S on September 05, 2006, 08:21:55 PM
before you go adj anything make sure your choke isnt froe up in the carb it is very common on the 660 raptor it gets corrosion inside the choke housing and deteriates the spring for the choke the fix is to replace the choke starter valve system.
Thanks, I will check that.


Title: Re: New Raptor 660 modifications
Post by: Skully on September 05, 2006, 08:26:52 PM
If I remember right, the two carbs are jetted differently(mains). I definitely remember having to richen the air screws on the bottom so my headers would quit glowing red at idle.

I have the pro-flow with a Alien full exhaust, but I used a Dyno-Jet jet kit also..... Works pretty good, just follow the directions.


Title: Re: New Raptor 660 modifications
Post by: fastrnrik on September 05, 2006, 08:58:42 PM
Sent you a PM