2.5 using oil

Einar said:

This was the cause of my oil leak, just fixed today.

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Journeyman said:

Curious- how much oil were you using?

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Einar said:

In the last 1,500 miles I've had to add nearly a half quart.

The bolts weren't torqued to spec, but even after tightening them it still leaked until the dealer installed new o-rings.

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Journeyman said:

Found out my bike has been leaking oil. It's always "used oil" and I wonder if this could be where it's been going all along- seems likely. It's coming from the gear position sensor and is slow enough that it never drips beneath the bike and may only happen when the bike is running. If so, the oil is running along the crankcase where it is air blown and cooked off.

Occasionally, I would detect the smell of oil, but could never find it. Finally, I laid down under the bike and noticed an oily section on the crankcase. I removed the cover for the starter (above the shifter) and thoroughly cleaned up the entire area. Waited a while and there was no sign of a leak, but after letting it run a couple of minutes I quickly found the culprit.

It takes two o-rings and hoping NAPA might have them, but probably not. They're $1.03/each from Triumph (T3600267) and hopefully in stock. Just glad it wasn't the seal on the torsional damper, which would be a whole different deal .

If you're mysteriously losing oil you might want to have a look....

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Journeyman said:

Update- I ordered two o-rings from Triumph and, of course, not in stock at my local dealer and now on week two waiting for them to come in. I can't find that size anywhere else and tried some slightly oversized from Napa, but no go.

I reinstalled the old ones and, surprise!, leaking worse than before. So, I went into my harbor freight kit of metric o-rings and without a direct match went to one thicker, but with a smaller ID. Turns out it fits good and snug stretched around the sensor and into the mating surface. So far, no signs of a leak. When the Triumph ones come in I doubt that i'll install those, unless this one starts leaking- I suspect it's a tighter fit than the original part. I used just one instead of two originals that are stacked together. The size is 22 x 3mm (G22).

I hope anyone who's bike is using oil will take the time to look for this leak. I suspect there could be quite a few of us out there. It only leaks while running and never shows a drip on the floor under the bike. Here it is but much worse this time than before....

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sunny said:

do you have link for that O ring from Harbour freight? or part number of the ring you installed? makes it easier to buy

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