Engine Breather

Like many of the Coventry makes, Triumph had their roots in the bicycle industry, beginning motorcycle production in 1902.

Engine Breather

Postby Bill » Sun Feb 21, 2010 4:04 pm

Does anyone know the outside diameter of the engine breather tube for a 66' 650 lump? It's the type that exits in-front of the gearbox (final drive) sprocket. It looks to be about 3/8", but i can't get anything in there to measure it properly. Need to shove a bit of hose over it to stop the oil drips.

u k fl ag
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Re: Engine Breather

Postby L.A.B. » Sun Feb 21, 2010 6:05 pm

The '66 parts book lists the breather hose as part number "E5375".

E5375 is now part number: 70-5375.

A Google of "Truimph (part) 70-5375" found this:

http://www.moorescyclecenter.com/respon ... ?partID=ea
BREATHER TUBE, 3/8",OIL VENT (70-5375)

It may need to be a piece of fairly thin-walled tubing in order for it to fit?
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Re: Engine Breather

Postby Bill » Sun Feb 21, 2010 8:14 pm

Cheers LAB. I did have a look at the parts book, but it didn't say anything about the size of the tube.. just what it is. Just had a look on the Burton Bike Bits site.. they're saying it's 5/16" bore. Confused?? Yep. Would be nice if it wasn't in such a stupid place. :250
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