The Three Sisters, aka The Twisted Sisters

never heard of Kevin Carmichael blowing a motor and he keeps them up a lot longer as I said I Call BullSh!t on their weak AR5E excuse
 

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I thought so too, but @warp9.9 said the return line is in the front of the oil tank.
Warp and Pedro have been chasing down the oil pathway in the engine in the hopes of figuring out why some egines leak down from the tank and why so do not. Its kind of a complicated pathway especially how the oil pathway moves thr thr sump pan both engine supply and return to the oil tank. Learned some neat things one being the anti leak down valve is only the when the engine is not running while running it is a one way pressure valve. I have been gone a while so I have not got to cut a tank open. But the front pipe going from th tank to the pressure pump is gravity fed from what I have seen with a scope it also takes a 90 degree turn once in the tank and routesbalong the bottom of the tank. Whipe the return oil from the scavenger pump runs up thru the rear of the tank over the top and dumps on a baffel and drips down off the baffel into the tank. Since the tank is not pressurized (or you would blow oil out the crankcase filter) so I am wondering if a oil flow disruption can or can not mess with other engine parts or not. I have not gotten that far yet. Remeber there is also a pressure release valve that blows off excess pressure and oil into the trasmission area which can be good for the gears. So I also wonder what affect would happen if a air pocket in the gravity feed system? Alas I am in house construtction/repair mode and have not been near a rocket since July. Nor have I been home either. The only pathway views I have access to are on the tech site so I am limited. Man I am like a dog riding in a car and no one will roll the window down. :(

Anyway at this distance its hard to chase down problems you might need a better opinion then what I can provide. Its much easier when you can run down into the basement and flop engine cases around on the floor and ponder on what you you see.
 
never heard of Kevin Carmichael blowing a motor and he keeps them up a lot longer as I said I Call BullSh!t on their weak AR5E excuse
Ya I really got Triumph telling you if the motor suffered any in that amazing video or if it took more then one bike to make it. That would be like them owning up to bad ignition switches and front torsional damper bearings being install backwards or even why the rear oil fed bearing was chaged to a grease fill one. Better yet maybe put out a service bulletin about greasing the driveshaft splines.

When it comes to steels bike I could only guess which would be improper as it is not infront of me. And if it was we would still be dealing with the fact that I am no technician. I am not ready to put my foot in my mouth :D
 
Wait a sec - tis a dry sump motor, wonder what affect that is???
I watched a vid about a guy that did over 37 miles in a wheelie and used a trials bike for just that reason.
This is a question I have been asking myself. Is it really a dry sump? Oil drops into the sump and is sent to the tank via scavenger pump. Whats the definition of a dry sump? Can you roll the engine upside down and run it like flying a planebwith a dry sump system? I think not as they scavenger pump would not pick up oil to send back to the tank. Is it more like a semi dry system or is it because you can't put a large pan and oil pump in the bottom without raising the engine say a foot up in the frame so you do not drag the oil pan and pump on the road. I do know a lot of the guys who ride ****** rockets like pogo sticks suffer from oil starvation once the pump pick up is sucing air. So the question I keep asking myself is will a oil flow disruption say the system gets a big gulp of air still have or show pressure on the sensor as the air bubble works its way thru which cannot be good since oil flows from the filter to the crank shaft via drillings in the cases? Either way I believe Steels bike suffered from a different problem then the last. Of which so far I have pondered on two possibilities while I have been up on the scaffolding on my house. And I will keep pondering on it.
 
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