Further to recent posts on oil supply matters I am thinking I would like oil gauge and an electronic rev counter on the 99. Both would need to be small ,say 50 mm Max and with the RC a range up to say around 7000 . I wonder why the oil gauge needs a vulnerable capillory tube. Cars had electric oil gauges many years ago. Anyone got any good experiences they can share?.Good Christmas pressy idea?.
That tube is at big end…
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"If you are looking"....
.... Exactly. You're most unlikely to be looking at it if / when it fails....
I'd steer clear of anything that introduces a weak point. May years ago I fitted a warning light to my Commando using an extended banjo bolt on the head feed. In deepest France I noticed a hot wet left leg. The banjo had fractured, fortunately warning me by said wetness.
The other thing to remember is that the Commando Service Notes suggest oil pressure when the engine is hot is not high.
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It would appear that gauge…
It would appear that gauge sender units are all too big to fit in our spaces.A simple warning light sender is viable but of limited use. I can see why the banjo /capilary tube is used.
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Sources for parts
Have a look on Demon Tweaks catalogue for instrumentation. Lots of useful goodies. I used to get my parts there when I was Saloon Car racing. Back in the day, I used oil pressure kits made for Minis. Oil pressure when hot is often as low as 5 lb sq. in. I found this out on indicator plunger Triumph engines that the plunger struggled to come out when hot, and pressure was that low. With a capillary tube one needs a flexi at the fork end, and the pipe needs a coil to stop metal fatigue. I can guarantee that most people cannot act fast enough to catch a fast pressure drop in time, and the engine nips.
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That tube is at big end pressure and is exposed, if it fails then oil pressure at the big ends will drop but you will have notice at the gauge if you are looking. So I have an electric sender waiting to fit, just need an adaptor as the sender is large and needs space plus its 1/8 NPT thread.