Yamaha RX1 Engines

382 posts in this topic

Posted

Got the RX-1 fired up last night now I'm getting excited. Has anyone tapped into the oil pressure test port on the head and if so what oil pressure are you reading?

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Posted (edited)

You really have an outstanding accomplishment.

You mentioned the oil test port.  A spring loaded check valve and auxiliary/prelube oil pump may be able to hook directly into the oil pressure test port.

Since the RX-1 is a pressurized oil system, I wonder if its TBO would benefit from a pre-lube pump and maybe even a pre-heater incorporated into the pre-lube system?   This could additionally provide a convenient means of having a light weight cabin heater system.

http://turbowerx.com/Scavenge_Pumps/Exa-Pump/Exa-Pump.html

Since the RX1 was made to be a vertical motorcycle engine, I would imagine the oil pickup would lose oil pickup supply during negative G's, climbing, slipping, and (if considered) inverted operations.

I would guess that Winter and daily starting, as well as starting after long times between starting, would benefit from pre-lube and pre-heat.

 

exa-pump-with-new-heatsink_trimmed-2[1].jpg

Edited by JimD

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Posted (edited)

Not sure of the negative G's, but cold weather starts, I envision, should not be an issue, as these are sled engines.  I had one and it would fire up easily, even at -10F.  Quite incredible for a 4 stroke.

Edited by LSaupe

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Posted

Here is a picture of the  engine mount glen (flyingwrench) makes and has for sale.

20170426_194001.jpg

how can we get ahold of the flying wrench? 

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Posted

Glen David (AKA flying wrench)

(623) 256-4115

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Posted

Was there any mention of what this motor mount costs?  JImChuk

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Posted

I would agree that the pump is a nice little ad-on but would rather be able to monitor oil pressure. On a different subject what is everyone using for a tractor prop diameter and pitch?  I have limited ground clearance in my Zenair CH701

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