I am new to four stroke sleds and just snow checked a Viper MTX. Are these going to have a rollover valve? If not and the sled rolls what is the procedure to not cause engine damage?
Noob 4 stroke question
- Thread starter Tomkat700
- Start date
S
Viper does not have a rollover valve per se. But the crankase venting system seems to do a fair job. We have rolled our Viper twice and not lost any oil, but we didn't leave it over very long. Ours died both times it was upside down also but not sure if that is a feature or we just got lucky.
I would advise buying a dedicated roll over valve though just to be safe.
C
Anytime we roll over the 4 strokes, we let them sit for a bit before starting. If upside down for a bit then leave them longer and roll / crank the engine a couple of times without letting it start. Had one this year that was stubborn and had to leave it overnight - started up fine next morning.
Roll over valve is a good idea but we settled on a tether install instead (save the motor and personal protection).
Roll over valve is a good idea but we settled on a tether install instead (save the motor and personal protection).
Jacobsen roll-over valve is the only way to go on a 4 stroke.
Tomkat700,
All four stroke engines that utilize a dry sump lubrication system, require a method of venting for the oil tank.
While the engine is running pressure/vacuum is created with in the crankcase/oil tank due to the pumping action of the pistons, blow by gasses, oil pump scavenge rate, etc. Normally at idle the vent pressure will be pulsating and as engine rpm and load increases so does the vent air flow rate. In order for the oil return to function correctly, the air pressure in the tank must remain at near 0 psi as much as possible under all operating conditions. This is why the vent hose is a fairly large diameter. (usually 5/8" or 3/4" inside diameter).
The various sled models use different methods of venting. In the case of the Viper/XF7000, it uses an air/oil separator tank. The tank does help, however under the right circumstances oil can still leak out. Normally factors such as what angle the sled is sitting at, how long it's been on it's side or upside down, and if the engine is still running are the main factors whether or not oil will leak out.
A new feature to the Viper/XF7000 ROV kit is the Quick Prime switch. During testing I found that if I rolled my sled, under certain conditions the oil pump could loose prime. To make the re-priming process easier/faster the ROVCM closes the shut-off valve when the Quick Prime button is pressed. This allows air pressure to build in the oil tank, which in turn pressure feeds oil to the oil pump for re-priming. Normally re-priming will occur in just a few seconds:thumb:
Bill
All four stroke engines that utilize a dry sump lubrication system, require a method of venting for the oil tank.
While the engine is running pressure/vacuum is created with in the crankcase/oil tank due to the pumping action of the pistons, blow by gasses, oil pump scavenge rate, etc. Normally at idle the vent pressure will be pulsating and as engine rpm and load increases so does the vent air flow rate. In order for the oil return to function correctly, the air pressure in the tank must remain at near 0 psi as much as possible under all operating conditions. This is why the vent hose is a fairly large diameter. (usually 5/8" or 3/4" inside diameter).
The various sled models use different methods of venting. In the case of the Viper/XF7000, it uses an air/oil separator tank. The tank does help, however under the right circumstances oil can still leak out. Normally factors such as what angle the sled is sitting at, how long it's been on it's side or upside down, and if the engine is still running are the main factors whether or not oil will leak out.
A new feature to the Viper/XF7000 ROV kit is the Quick Prime switch. During testing I found that if I rolled my sled, under certain conditions the oil pump could loose prime. To make the re-priming process easier/faster the ROVCM closes the shut-off valve when the Quick Prime button is pressed. This allows air pressure to build in the oil tank, which in turn pressure feeds oil to the oil pump for re-priming. Normally re-priming will occur in just a few seconds:thumb:
Bill
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Absolute MUST HAVE item!
Arctic Cat XF7000/Yamaha SR Viper Roll Over Valve Kits
http://fourstrokesolutionsllc.webs.com/xf7000srviperrovkits.htm
Premium Roll-Over Valve Kits for Arctic Cat XF/7000 and Yamaha SR Viper
Features
All XF7000/SR Viper Roll-Over Valve Kits are premium kits that come standard with our Electronic Roll-Over Valve Control Module or ROVCM! The ROVCM adds features such as auto-shut down protection, oil pump re-prime mode (for XF7000 and SR Viper models) 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 have also 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. To re-prime the oil pump without a Roll-Over Valve requires removing the right side panel, removing the oil tank breather tube from the air box assembly and then manually plugging the breather tube while cranking the engine over. What this does is pressurize the oil tank, which in turn forces oil to the oil pump to re-prime it.
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. It's that simple, quick and easy to use !! Normally the oil pump will re-prime in about 2 seconds! 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.
Compact valve design:
The best possible location to install the shut off valve on a XF7000/SR Viper is directly above the air/oil separator tank. In this location the shut off valve has the ability to help stop roll over oil leakage right at the point of exit. This helps prevent residual oil from collecting in the breather tube after a roll over event
Hood removal quick release connector:
M1100T Roll-Over Valve kits and the XF7000/SR Viper Roll-Over Valve kit comes with a four pin weather proof connector. The connector provides a quick disconnect point in the main ROV harness, for when removal of the snowmobile hood is required.
Genuine OEM Arctic Cat tether switches:
Just like our other Roll-Over Valve kits, the XF7000/SR Viper ROV kit comes standard with OEM Arctic Cat tether switches.
Plug and Play installation:
The XF7000/SR Viper ROV kit is plug/play into the back of the ignition switch for easy installation.
Tether controlled:
Just like our other Roll-Over Valve kits, they are tether cord operated for simple operation!
Patented: Roll Over Valve kits are US patented under patent numbers 8,225,766 and 8,528,516.
Sent from my iPad using Tapatalk 2 pro.
Arctic Cat XF7000/Yamaha SR Viper Roll Over Valve Kits
http://fourstrokesolutionsllc.webs.com/xf7000srviperrovkits.htm
Premium Roll-Over Valve Kits for Arctic Cat XF/7000 and Yamaha SR Viper
Features
All XF7000/SR Viper Roll-Over Valve Kits are premium kits that come standard with our Electronic Roll-Over Valve Control Module or ROVCM! The ROVCM adds features such as auto-shut down protection, oil pump re-prime mode (for XF7000 and SR Viper models) 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 have also 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. To re-prime the oil pump without a Roll-Over Valve requires removing the right side panel, removing the oil tank breather tube from the air box assembly and then manually plugging the breather tube while cranking the engine over. What this does is pressurize the oil tank, which in turn forces oil to the oil pump to re-prime it.
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. It's that simple, quick and easy to use !! Normally the oil pump will re-prime in about 2 seconds! 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.
Compact valve design:
The best possible location to install the shut off valve on a XF7000/SR Viper is directly above the air/oil separator tank. In this location the shut off valve has the ability to help stop roll over oil leakage right at the point of exit. This helps prevent residual oil from collecting in the breather tube after a roll over event
Hood removal quick release connector:
M1100T Roll-Over Valve kits and the XF7000/SR Viper Roll-Over Valve kit comes with a four pin weather proof connector. The connector provides a quick disconnect point in the main ROV harness, for when removal of the snowmobile hood is required.
Genuine OEM Arctic Cat tether switches:
Just like our other Roll-Over Valve kits, the XF7000/SR Viper ROV kit comes standard with OEM Arctic Cat tether switches.
Plug and Play installation:
The XF7000/SR Viper ROV kit is plug/play into the back of the ignition switch for easy installation.
Tether controlled:
Just like our other Roll-Over Valve kits, they are tether cord operated for simple operation!
Patented: Roll Over Valve kits are US patented under patent numbers 8,225,766 and 8,528,516.
Sent from my iPad using Tapatalk 2 pro.
Last edited:
