Vacuum Connections General
The original Scottoiler Universal Kit, Touring kit and latest vSystem kits are vacuum operated. The core of the systems being the Reservoir Metering Valve (RMV), a vacuum operated valve.
When an engine is running negative pressure (vacuum) is generated, this is the case whether 2 stroke, 4 stroke, single cylinder, 4 cylinder, carburetted or fuel Injected. This vacuum can be used for ancillary devices such as emissions control systems or fuel taps and a Scottoiler.
Scottoiler take advantage of this by using vacuum from the engine to open the valve of the RMV when the engine is running, allowing oil to drip feed under gravity to the dispenser – generally at the rear sprocket. The following document describes the various methods of accessing this vacuum, for model specific information see www.scottoiler.com where over 300 models are listed.
The RMV is a sealed device, when fitting ensure all connections are firmly made so the system will be closed i.e. no air will be drawn into the engine. On startup the RMV draws 3cc of air and holds this until the engine is stopped, this will not affect the running of your motorcycle.
In all instances the Vacuum Damper Elbow, shown opposite, is used to provide an air tight connection to both the engine vacuum point and the black nylon vacuum tubing. There is a bronze damper pellet in the Damper Elbow which serves to dampen the pulsating vacuum from the engine. This is more apparent with large single cylinder / twins than smoother 4 cylinder bikes.
On some models there are spare vacuum points, these might be redundant in certain markets due to emissions laws or might exist to facilitate carburettor / throttle body balancing.
This often provides a very straight forward vacuum connection, merely locate the vacuum point, remove the cap / bung and press the Scottoiler Damper Elbow onto the vacuum point.
The top picture on the left shows a typical bung over spigot on a carburettor. In the lower half you can see the bung removed and the Damper Elbow being pressed on to the spigot.
- Lightly lubricating the vacuum tubing, damper elbow and T-Piece will make them easier to press fit.
- If the damper elbow is too tight to fit onto the chosen vacuum point it can be warmed in hot water to make it more pliable.
- Check T-Piece and vacuum tube routing does not interfere with moving parts e.g. throttle linkages. Also avoid any hot exhaust and engine components.