I have a R3tourer and have been looking for a rev counter ,i have posted about it on here before and the latest surgestion was use a [h=1]Garmin ECO Route HD Nuvi which i have looked at and found will cost about £150 +[/h]I just had the bike MOTed and the guy there said he used a bluetooth OBD2 with a android tablet to check engine info on his racecar.So after some time on ebay i have found that i can get setup for £20 as i have an android phone and 7in tablet .
Now this is not proven yet but just wanted to put it out there so others would know