Installing a V.O.E.S. for the Mikuni HSR carburetor

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Written by Randy Fox (Randysgym)   
Thursday, 11 October 2007

Mounting the VOES

The VOES unit can be mounted anywhere, in any orientation. I used the mounting bracket that came with the unit, and attached it to my upper motor-mount bracket. However, others have used wire-ties or home-fabricated brackets just as effectively.

I found that the bracket retainer didn’t fit very snuggly, so I used some silicone gasket-maker to help create a more solid mount. To do the mount my way, first put a bead of high-heat gasket-maker (I used Permatex RTV #26B, red) around the large hole of the VOES mounting bracket. It's the big hole with the little key-slot in it. Put a moderate amount of gasket-maker on both sides of the bracket surrounding this hole.

 

Image

 

Next, slide the bracket on to the VOES, with its key tab fitting into the key-slot of the bracket. See photo above for reference.

Now slide on the supplied retainer washer--cupped side down. This is a one-way retainer, so be sure to get the bracket, VOES, and retainer oriented correctly, before putting on the retainer. Though none of the photos show this retainer, use the photo above as a reference.

Push the retainer firmly on to the VOES, against the bracket. Use pliers or a screwdriver if you want, but be careful not to break the retainer or the VOES.

It is likely there will still be a little slop in the bracket, as the retainer doesn't fit down fully--at least mine didn't. The gasket-maker will take up this slack, once cured.

Set the bracketed VOES aside to let the gasket-maker dry.

After the gasket-maker has fully cured, mount the VOES in the bike. I mounted mine by using one of the little bolts that mounts the stock fuel-pump bracket to the upper motor-mount, between the cylinders. It is invisible when the tank is mounted. See photo below.

 

VOES mounted, Yamaha Road Star

 

To do this, remove the outer-most bolt that mounts the stock fuel-pump bracket to the upper motor-mount. Slip a little washer on to the bolt; then mount the VOES at this location, and secure it using the bolt and washer.

 

Connecting the Wires

The VOES will be connected to the yellow and the blue/black TPS wires. It does not matter which VOES wire is connected to which TPS wire.

Since I thought I might want to try VOES units with other trip settings, I just used some wire taps. To do this, I simply clamped male connectors on both (yellow and blue/black) stock TPS wires. Then I trimmed the two, dark-grey, VOES wires to a reasonable length, and crimped female connectors onto the wires. Finally, I just smeared some dielectric grease on the contact pieces of the connectors to inhibit corrosion, and plugged the connectors together. See photo below.

 

VOES wiring, Yamaha Road Star

 

You can use any method you wish, to attach the VOES to the TPS wires. Others have stolen the TPS connector from their stock carb, connected the connector-pins for the yellow and blue/black wires to the VOES, and then just plugged the connectors together.

 

 
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