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I have a 1958 Triumph Tiger Cub T20 that has been completely disassembled for +10 years. I have been cleaning and reassembling this bike using all the resources I could find. One hangup that I have is what appears to be an oil line coming from the crankcase through the grommet that the clutch cable uses. Does anyone know where this line goes? I have already connected the two lines from the pump to the reservoir and the malleable line from the valvetrain to the reservoir, but cannot make sense of this other line. Any help would be much appreciated. Thanks in advance for any help.

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I think it's just a breather that is normally directed to the chain.

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Hmmmm that makes sense, I bet any oil that may spit out of the crankcase is used for lubricant on the chain. Thank you for your response!

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The oil line should be hooked up to a small piece of metal tubing (about 2") in the right side inner cover. It is a vent. The 1958 was just a breather to add more pollution. The vent pipe part number is 70-3775


rightshifter

1967 T20M 1958 T20C 1960 T20S 1960 T20SS 1961 T20 1965 T20SC 1965 T20

1967 T120R 1969 T120R 1970 T120R

1969 T100C 1968 T100R

1953 6T 1957 TR5
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Thank you for your added response, I have another question. The left case that has the inspection cover for the clutch adjustment, the case has a drain screw. Is that case supposed to be filled with 20W, in other words, is this supposed to be a wet or dry sump, and if it is supposed to be a wet sump, is the oil level supposed to be at the bottom of the inspection plug. Thanks again for your responses.

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Needs to have oil in it for the primary chain. Not up to the inspection hole, thats too much, just add about 200cc

Last edited by tiger_cub; 05/02/21 3:25 am.

1968 T150/TR6R
1970 TR6C
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Quote
the case has a drain screw

it also has a "fill to level" screw , either at about 5 oclock behind the clutch ... or
at about 7 oclock under the front sprocket .
if these are open , it allows oil over about 200 cc to drain out .
the idea being only the bottom of the chain needs to dip into oil .
...and too much oil will add drag over what is necessary to keep the chain oiled

8 oclock fill screw[Linked Image from i.ebayimg.com]
5 oclock fill screw[Linked Image from i.ebayimg.com]

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Do you have a Manual and workshop Manual?
There is also a Facebook group for Cubs and I recomend the Tiger Cub Bible

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Thank both of yall for your responses, that is the information that I needed. Thanks again. Thank you for your suggestion on the Tiger Cub Bible, we currently have a Haynes Manual that is lacking at best.


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