Roll-Over Valve kits for Viper/XF7000!

We now have ROV kits for the Viper/XF7000! All Viper/XF7000 ROV kits come standard with our ROVCM.
Also a new feature for the Viper/XF7000 kit is the oil pump re-prime mode!


The ROVCM adds features such as auto-shut down protection, oil pump re-prime mode and a much stronger/faster closing shut-off valve! For a detailed description of about the ROVCM please see our high performance ROVCM page at http://fourstrokesolutionsllc.webs.com/highperformancerovcm.com

New ROVCM programming:
With the shut off valve mounted horizontally above the air/oil separator tank, we have developed new ROVCM programming to fully take advantage of this new mounting location. The ROVCMs are now programmed to initially close the shut off valve at 15.6 to 15.7 volts. This increases the valve closing strength by approximately 150% when compared to straight battery voltage and allows the shut off valve to be the strongest and fastest closing roll over valve built to date!

Engine oil pump re-priming mode:
If a XF7000 or a SR Viper snowmobile is laying of its side with engine still running, the oil pump can start to draw air due to the suction port in the oil tank being exposed to air. When this happens the low oil pressure switch may shut down the engine to help protect the engine. During this time the engine oil pump may also have lost its prime. When the rider gets the snowmobile back upright, he or she may find that the engine may not re-start or starts and shuts down within a few seconds due to no oil pressure.

Because all XF7000/SR Viper Four Stroke Solutions LLC Roll-Over Valve kits are equipped with a ROVCM, we have developed programming specifically for the oil pump re-prime feature! During the re-prime modes the ROVCM commands the valve to close, which allows pressure to build in the oil tank and force engine oil to the engine oil pump for re-priming purposes. The ROVCM uses pulse width modulation to regulate the air pressure inside the oil tank to safe levels. During Quick-prime mode the ROVCM regulates the air pressue to 8 to 8.5 psi. During method 2 (cranking re-prime mode) the ROVCM regulates the air pressure to approx 4 psi.

There are two ways to use the Roll-Over Valve to re-prime the oil pump.

Method 1, Using the Quick-prime switch.

To use the Quick-prime switch simply press and hold the Quick-prime switch down while starting the engine. Once the oil pressure light goes out on the gauge, release the Quick-prime switch. You can also press the Quick-prime switch after the engine has started and notice that the oil pressure light is on. In this case it's best to push and hold the Quick-prime switch right away, so that the pump has time to re-prime before the low oil pressure switch shuts the engine down.

Method 2, cranking re-prime mode.
To use the cranking oil pump re-prime feature, simply leave the tether cord pulled and crank the engine over (the engine does not start during cranking re-prime mode) for approx 30 seconds. The ROVCM will command the shut off valve to close and the LED will flash. After cranking the engine over for approx 30 seconds, re-install the tether cord and start the engine.


Link to pricing info http://fourstrokesolutionsllc.webs.com/pricingandhowtoorder.htm
Link for more info http://fourstrokesolutionsllc.webs.com/xf7000srviperrovkits.htm
Link fo rmore pics! http://fourstrokesolutionsllc.webs.com/apps/photos/album?albumid=15277412

Bill

calltrex said:

What does the led indicate?

Click to expand...

The LED will flash to indicate that the valve is closed.
Also on the Viper/XF7000 during oil pump re-prime mode the gauge is not powered on, so the LED will also flash during re-prime mode to indicate that the ROVCM is closing and regulating the valve.

Bill

Now with Quick-prime!

We've just added a new feature to the Viper/XF7000 ROV kits, a Quick-prime switch.
Now re-priming the oil pump on a Viper/XF7000 is as simple as pushing a button on the dash and holding it for a few seconds!
If the oil pump has lost it's prime and the oil light is on after a roll-over. Just push and hold the Quick-prime switch and start the engine. The ROV LED will flash letting the rider know that the ROVCM has closed the shut-off valve, then as soon as the oil light goes out release the Quick-prime switch. Normally re-priming will occur in approx 2-3 seconds:thumb:

Bill

Preseason maintenance

Preseason sled maintenance reminder, for those who are running a ROV kits.
I like to add a small amount of Sil-Glide (silicone grease) or dielectric compound to the inside of the rubber tether plug.

It's also a good time to check the shut off valve to see if it needs cleaning. A quick and easy way to test the valve for cleaning, is to touch the valve housing with your fingers. Then with the key on, pull the tether cord and you should be able to feel/hear a light "click" as the valve closes. If it clicks then your good to go. If no click is felt or heard, then the valve may need cleaning.
The cleaning procedures can be found at http://fourstrokesolutionsllc.webs.com/periodicmaintenance.htm

Caution, do not use brake cleaners to clean the valve. Some brake cleaner contains chemicals that can swell the rubber seal inside the valve and damage it.

Also the valve cleaning procedures may be used on both OFT Racing and Yamaha ROV kits as well.

Bill

I had this question come up from one of my customers and I think that it is worth mentioning.

On Viper/XF/M7000 snowmobiles, if the rider uses the handle bar kill switch the shut the engine down but forgets to shut the key off, there will still be a 123 mili-amp drain on the battery. Because the ignition key is in the "on" position, one of the snowmobile's relays is still being energized but is not passing current. This is a normal condition and it's always best to turn off the engine using the key.

Note: because the gauge display is powered down the rider may not notice that he/she has left the ignition key in the "on" position.

A unique feature of the ROVCM battery voltage monitoring/auto shut down mode, is that it will also power down the snowmobile relay!
If the tether cord is pulled with the key left in the "on" position and the handle bar kill switch is pressed, the battery voltage monitoring/auto shut down feature will shut down both the Roll Over Valve system and the snowmobile relay to drop the battery draw to zero amps!

BigFish BC

I just sent another order off to Gene, so he should be able to get you set up!:thumb:

Bill

CatRpillar said:

Aside from being able to remotely engage and disengage the valve, what are the benefits of going with this system over a purely mechanical rollover valve? Is it more positive and repeatable in its operation for instance?

Click to expand...

When a mechanical check valve is used in the breather system, usually it is dependent on gravity to function. Mechanical check valves work well in watercraft, because a watercraft is either going to be right side up, or 180 degrees upside down. A snowmobile can be tipped over pretty much at any angle and often times they are tipped at an angle steep enough for oil to leak out. However it may not be a steep enough of an angle to activate a mechanical check valve.

The electric system actually has several functions
The first function is to get the engine shut down as soon as possible. While engine is running, there is positive air pressure escaping out the breather hose. If the sled is tipped on it's side at a steep enough of an angle, oil can flow over to the breather port in the oil tank. Once this happens the positive air flow (from the running engine) can actually pump the oil out of the tank under pressure.
The second function of an electric system is to simultaneously close the shut off valve while shutting down the engine. The shut off valve closes the breather to help prevent oil from escaping.

A third function on Viper/XF/M7000 sleds is the oil pump re-prime mode. Because the re-prime function uses pressure to feed oil to the supply port, it can be used at odd angles once the sled is rubber side down. This means that you don't necessarily have to have the sled on completely level ground for it to function.
The pump re-prime button can come in handy if you are in an area where you don't want to be in (such as stuck on a side of a very steep hill) and need to quickly re-prime the oil pump to get on your way!

To provide consistent and repeatable valve closing under all operating conditions on Viper/XF/M7000 sleds we use a ROVCM control module. Because the shut off valve is effectively about 170% stronger when a ROVCM is used in the circuit, the valve is much more resistant to oil/moisture residue that may accumulate in the breather system. This also reduces maintenance (valve cleaning) and in some cases even eliminates it.:thumb:

Bill