Has anyone mounted a VDO oil pressure sender to their bike in place of the stock switch? Specifically in the 550? I don't remember if the oil pump/pressure switch location is similar on the 750. On the 550 it looks close, too close to tell from the photos if it will actually fit or not, and it'd be nice to have confirmation before I shell out 25 clams for one. Going to make an integrated oil pressure/temp gauge, built into the stock tachometer.
Dang - you will beat me to it, if you do! Having put them on a couple of VWs, I was thinking that that would work great, too, since the stock Honda warning light sensor looks just like the stock VW / VDO warning light sensor and I believe (almost positive) has the same metric pipe thread. The dual sending unit (pressure gauge + warning light) is a lot bigger though - doubt you will be able to clear the cover with in inside, at the stock Honda position.
I was thinking of running an extension up several inches and drilling a hole in the cover for it to stick through, so that the sending unit would be just outside the cover.
As far as the gauges go, I like the VDO 'Marine" line with the chrome bezel - they make different ranges of oil pressure too, like this 150PSI version (I don't recall off hand what max psi would be on the Honda, but I'm thinking the 150 would cover it fine?). I think the marine line might be more water resistant, too - nice on the cycle.
I also re-tapped a brass temperature sending unit and made it the actual drain plug, for my VW van, to use along with another oil temp gauge. Even though I am sure the temp would be a bit cooler down that low in the oil, it worked great.
