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   As you drift quietly off to sleep you are unaware of the evil lurking out side your tent or RV. An unspeakable evil that never sleeps. An evil that never rests. An evil that feeds on the precious fumes contained  with in what you thought were the safe confines of your bikes fuel tank. A demon that drinks racing fuel and excretes water...

   Thermal expansion/contraction...

   Now I'm no engineer or physicist, and you probably aren't either. But, here's what happens in a nutshell...

   During the day the ambient air temperature is 90° and rising. This causes fuel to evaporate and the air in your tank to expand. All the "good stuff" is being forced out your vent hose in the form of vapor as our demon feeds. As temperatures drop after sun down (as much as 40°, if like me you ride in the desert southwest), the air in your tank contracts. This draws in water vapor which condenses on the walls of your fuel tank further destroying your $5.00 a gallon race gas. If your bike is stored your fuel is destroyed within days. All the high volatility components have been removed and replaced with water. Not what makes a high dollar, high compression engine sing a precision tune!

      There is a solution! A new product is now available called "VentStop." Simple to install and easy to use it prevents the parasitic effects of thermal expansion from robbing you of performance and preventing possible engine damage do to pre-ignition from poor fuel quality.

   Located in Eden Prairie, Minnesota, Whiplash Systems has designed this innovative component for your ATV or dirt bike that will certainly pay for itself in a few trips. Its design is ingenious and with its high quality finish, not only works but looks clean and sanitary! Installation takes less than 5 minutes and can be performed by anyone. In fact it took me longer to find my 10mm socket buried in my trash heap of a garage than it did to install the VentStop!

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Note: As with any product installation, follow the manufacturers instructions carefully.

Click any image for blow up.

Brake lever perch mounting bolt that is removed for the VentStop's installation.	With a 10mm socket or wrench remove the bolt.	Install the VentStop with the included allen wrench (Do not over tighten!).
Adjust the brake lever's position and tighten the 10mm lock nut.	When done riding or for storage insert the end of your vent hose into the VentStop to prevent vapor loss/fuel contamination.	And no, you do not leave it here when you ride! Geez, with no air getting into your tank you ain't getting far!

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Why do you need a VentStop?

1. Hard Starts
Liquid gasoline does not burn; only gas vapor burns. To start a cold engine, enough low boiling fuel molecules must be present to vaporize at this cool temperature to enable combustion. Fuel left to evaporate allows these low boiling molecules to readily escape, they are then missing when you need them for that cold start.

2. Fuel Oxidation/Varnish and Gum Formation
As your fuel is mixed with oxygen from the surrounding air, oxidation occurs. The by-product of fuel oxidation is the production of large molecules, also known as Varnish and Gum. The result is a dirty carburetor and a stiff fuel shut-off lever.

3. Water in fuel
When humid air is drawn into your fuel tank, the water vapor condenses on the inner walls of the fuel tank, like the bathroom mirror after you shower. This condensed water, now in droplet form, runs down into the fuel due to gravity. The result is hard starting, miss firing, engine damage, and poor performance.

4. Engine Knocking
As low boiling molecules are lost though evaporation, a decrease occurs in the fuels Anti-Knock Index. This Index is the average of the R.O.N. and the M.O.N. octane numbers. As everybody knows, low octane means your engine will knock. Engine knock is the result of combustion chamber pre-ignition. In other words, your piston is still traveling upwards when the fuel mixture ignites. The result is severe engine damage.

5. Solid Particle Fuel Contamination
As the temperature of your fuel decreases, air from the surrounding environment is drawn into the fuel tank through the vent hose. This air contains thousands of unique, destructive particles. This includes; Dust, water (humidity), and debris from highway transport. The result is damaged cylinder walls.

6. Fuel Evaporation
As the temperature of your fuel increases, volatility goes up causing fuel evaporation, which leads to numerous problems such as varnish and gum formation, hard starts, engine knocking, and hydrocarbon pollution.

7. Hydrocarbon Vapor Pollution
15%-20% of all air pollution is caused by unburned hydrocarbons released into our atmosphere through fuel evaporation. These hydrocarbons cause cancer and other health problems. The result is poor air quality and increasing legislation to outlaw ATVs and motorcycles. Don't let this happen.

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  To order online Click Here

7287 Penny Hill RD
Eden Prairie, MN 55346
763-691-1673
Email: info@ventstop.com

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