I was wondering if anyone is running the FMF powervalve yet?How does it work in mud'snow or water?Second question Why does everyone say to remove the TORS? What is involved in doing so?
Thanks for any help!!

 

dont know anything about the fmf powervalve but i think it isnt worth the money at all.

now the tors. they are pretty much a waste of metal,weight, and space. they mess up sometimes, making the quad run bad or something. to remove them buy a kit you can get from ct racing. it comes up new carb caps, cables, and screw adjusters. you just take the tors and your whole cable off. put on the new cable and carb caps on and your done. i think it cost around $60.

 

oh yeah i forgot, when you remove the tors you also remove your idle adjusters. you can just run it with no idle, but if that pisses you off then buy the idle kit and put that in the side of carbs which requires drilling and tapping.

good luck.

 

The FMFs are worth the money, you need to look at the dyno outputs, some 50 odd horsepower. Not to shabby. It's a 400cc kit with power valves.

TORS stands for "Throttle Open Response System". here is how it works:

There is a switch in each carb and one in the thumb throttle. If the thumb throttle is disengaged completely (just sitting at an idle) and both carbs don't come back to the idle position, tors kills the motor. Its not an overly bad thing if you've ever had a carb stick up on you, let go of the throttle and the motor dies. It's purely a safety feature, problem being the TORS screws up now and then, and will kill your motor even when it's not supposed to.

You can pull the TORS without buying a kit. Just unplug the 3 wire harness that plugs in under the gas tank on the left side to a little black box. All 3 wires will be black in color, one or 2 of them have stripes (I know the wire from the carbs is black/yellow). Unplug that wire and you'll still have your stock carb tops that have an idle adjustment, but you won't have the problematic TORS system.

I would personally leave the TORS enabled unless you were having problems with it. A stuck open carb while headed for a tree isn't fun, and the system will save ya, if you do pull the TORS make sure you're always ready to clutch the quad if it wants to run away.

Brad

 

how much is the fmf powervalve? isnt is close to 2000?

whynot get some pipes, even used pipes, race porting, run alcohol?
you will be under 2000 if that is how much the fmf costs.

 

I guess I saw that the powervalve has those valves on the front and was wondering if they were like a vent that would suck mud or dirt.I'm considering vito's power pistions and a pro-flow kit.Also anyone running those Alba air filter lids?Thanks for all the help so far.I do think I'll leave the Tors hooked up until in messes up.Better safe than sorry.

 

The funny vent thing is the powervalve, Basically what it is is a variable exhaust valve, Which changes your exhausting port while running, keeping the motor on the pipe longer than is normally possible. Its like a variable port job, Big powerband, havent rode one yet, but have rode with one. If you want a broad powerband, HP and torque out of a banshee, POWERVALVES are the ONLY way to go. If this is to be your first mod, I would look into getting the stuff that the PV kit doesnt come with first. Like pipes, airfilter, ect. As they will cost much less and give you a good bang for your buck..

 

The FMF powervalves are surely enough not worth it. Not saying it's not good...but 2 grand is really exagerated.
For someone who is minimally mechanically inclined (like me), it is much better finding RZ top end + ignition electricals (500$) and bolting it on...and with T5s, you get 55+hp out of that setup (even with the 26mm carbs).
This said, powervalves are the only way to go. It;s like a variable porting. low port for low rpm, and the port height raises with the rpm, bringing you awesome low end....and awesome top...No big bore can claim that!! At first, I was thinking about sending my engine to Trinity to get a 420...but now, I'm very seriously looking for a RZ topend...the only downside is that it's 350cc and not 400cc (compared to FMF)...the good side...genuine Yamaha...just go to your local dealer to have parts very quickly...no waiting for your nearly unique piston...etc
The TORS is pretty good, except when it messes up...mine was running perfect, but I switched to a twist, so I had to remove it...when my throttle sticked, I remembered that a quad doesn't fall down on its own, and can go on...I got a kill switch, and now, my left thumb is constantly crisped on the off/run switch. When I put back the thumb, I might as well put back the TORS...

H300F,
why not get race porting etc...vs powervalves, porting doesn't stand a chance, because the more "extreme" is your porting (the higher the exhaust port closes), the worst your lowend will be...and your powerband hit will be harder again...and it weakens your cylinder too. Alcohol? mmh...fuel economy is scary!!

 

is the powervalve by fmf $2000? that doesnt even include pipes. so that is about $2500 total.

ok now put $2500 into another banshee motor and im sure this motor that was worked by a good company like A&S RAcing, PortMagic,CT, ect. would wipe up that fmf powervalved banshee in no time.

 

AdrenalinFreak,

what were you riding when you went riding with the fmf powervalved banshee? what other mods did he have besides the powervalve setup? other then the broader power band how did it do compared to your setup in a drag race or hill climb?