[viczena]

Sometimes you get stuck with a defect Roll over Sensor (ROS). The bike will not start without it. There is an easy way to build an eliminator plug.

You need 2 resistors (2kOhm and 10kOhm). A 4 pin Sumitomo HM090 female plug with connectors.

Crimp (solder) each resistor to a connector, crimp the other 2 wires together onto a third connector. Crimp a wire loop onto the fourth (empty) connector, so that you are able to pull the plug.

I keep this plug as a spare part in my toolbag.

https://www.g-homeserver.com/forum/royal-enfield-500-trials/392-roll-over-sensor

[axman88]

Thanks for posting this helpful information with pictures.   I see you suggested the voltage divider approach a few months ago, when a forum member was dissecting his rollover sensor.

What other sensors do you think could be bypassed by this method, in a pinch?  Manifold Pressure perhaps?  Maybe even Throttle Position could be fooled well enough to limp home?

[viczena]

You speak of a carb conversion? It should be possible.

[viczena]

As a sparepart it would be possible to use a 4k potentiometer. So you can make some adjustements. But it is quite rare that TPS or MAP Sensors fail.