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MikeG
MikeG
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#720345 12/29/17 8:13 am
Joined: Sep 2009
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I have a Norton P11 motor in a Trackmaster frame designed for a Triumph triple. I am curious about the oil return pipe in the frame, if it is up to the job of evacuating the crankcase. It has a fairly small exit hole which seems to flow at its maximum at all times. On a stock bike usually the return flow settles down after all the wet sumped oil has been pumped out and it begins spitting a mix of oil and air. Not this.
If I knew the output of a triple motor's oil pump and the Norton six start oil pump, I could compare those figures. However, the oil return hole looks skimpy in either case. The big question is if the Trackmaster oil return was fully up to the job. The spigot in the frame is large enough but at the top, the exit hole is quite a bit smaller. Has anyone had a lot of experience with Trackmaster frames and did this ever give problems such as the motor swamping itself?

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All of my Trackmaster experience was with a Yamaha (dry frame) or a Triumph twin. The outlet into the backbone was small, but I never had any wet sump issues with the Triumph.

Have you run the bike until hot and drained the sump? That would give you a good idea if things are working as they should.

Or you could just give the bike to me and I will deal with it. laughing

Last edited by Rich B; 12/29/17 11:40 am.

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I have run it perhaps 10 blocks at a time and noticed a lot of oil when I drained the sump, perhaps 2 cups worth, hence the question. There were plenty of other problems to overcome so I moved on .

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Maybe..
Put a tee in the return line to the frame.
Run the teed line into an open catchment ... with an inch or two of more head.
If return line into the frame is not restrictive ... The catchment will not recieve any oil
.


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