went to ride today i aint touched the thing in a while and last time i ride it ran like a dream, anwyas i go to ride adn it wont run in teh high rmps or mid rmps at all and its back firing big time, so i drain the gas adn put new gas with octane boster adn ti dont work so i put a new air filter it dont work, so i put a new plug still dotn work so i clean the fuel filter and it still dotn work so wats wrong it will idle all day but when you touch the throttle is sputters and backfires

 

Adjust the parking brake at the perch

 

try going to www.bluetraxx.com then click on forms it is a message board for yamaha spot quads they can answer any question about a raptor it is a very large site with tons of suff to read.

 

it is definatly the parking brake problem... keep messing with it.... damn sensors...

 

some of us in here no whats going on too... dont be so quick to scare ppl off lol j/k that is a good site too!

 

T.O.R.S sensor.

 

I found the directions for removing that stupid sensor and the reverse one (which is more of a pain in the ***, esp in the snow!)

 

I am sure you guys know whats up but it seems like there is mostly 400ex and z/kfx 400's on here so I reomended bluetraxx Which is devoted to yamaha's

 

Damn Ive had the same problem, Can you tell how you did with your reverse and the Parking brake sensor?

 

Here is some info on the TORS

TORS is the Throttle OverRide System found on stock Banshees. It consists of the large boxy carb tops, a switch on the thumb throttle housing, a switch on the parking brake perch, and a control box mounted to the frame rail above the left cylinder. The function of the TORS is to limit engine RPM if the parking brake is engaged, or if the throttle is released and the carb slides don’t shut. If the switch at the parking brake senses that the parking brake is engaged, it tells the carb tops not to lift the carb slides. Similarly, if the switch at the thumb throttle senses that the thumb throttle has been released, the carb tops won’t lift the carb slides. The problem with the system is that often the switch on the parking brake perch will fail to sense that the parking brake is not engaged, and will then limit RPM (the motor won’t rev past idle); adjusting the switch is the first solution, eliminating the TORS is a better one. Other drawbacks to the TORS is that the carb tops are huge and makes jetting more time consuming, the entire system is one more thing that can (and usually will) fail, and the system adds unnecessary weight. Eliminating the TORS is well worth the effort

 

"The problem with the system is that often the switch on the parking brake perch will fail to sense that the parking brake is not engaged, and will then limit RPM (the motor won’t rev past idle); adjusting the switch is the first solution, eliminating the TORS is a better one"

key words!! good post enasni!

 

man that was the problem, all i did was un plug it fron the bars the sensor on the top and then follow the wire down and un pluged it there and now it runs fine, that is so gay

 

I did away with the parking brake and the tors on my banshee.

 

that bluetraxx website is pretty good, i've been lurking there til 4AM for 2 days or should I say nights now

 

i was at the dunes last month and it ran fine loading it up . i did everything you did . finally i messed with the parking break and it ran great ever since then.