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Need vented primary plugs? #786295 10/05/19 3:42 pm
Joined: Sep 2017
Posts: 59
V
VANDOLSON Offline OP
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My 71 Thunderbolt is all back together. Have just a
few things left to do. I plugged up the rear chain oiler
from the Primary. Do I need a vented primary chain
inspection plug to provide venting the primary now?

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Re: Need vented primary plugs? [Re: VANDOLSON] #786313 10/05/19 7:55 pm
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kommando Offline
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Not really but they are available as they were used in the Triumph TR25W which was a badge engineered BSA B25,

Re: Need vented primary plugs? [Re: kommando] #786348 10/06/19 11:22 am
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VANDOLSON Offline OP
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Ok. Thanks.

Re: Need vented primary plugs? [Re: VANDOLSON] #786386 10/06/19 8:19 pm
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Irish Swede Online Content
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The "vent" is just a tiny hole drilled through the inspection plug.

I guess it doesn't take much of a hole to do the job.

Re: Need vented primary plugs? [Re: VANDOLSON] #786399 10/06/19 11:14 pm
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kurt fischer Offline
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The vented inspection plugs have a baffle plate on the inside, like the two in the top row of this pic. Use when "close enough" isn't good enough.

[Linked Image from live.staticflickr.com]



Kurt

-- Don't believe everything you think.
Re: Need vented primary plugs? [Re: VANDOLSON] #786400 10/06/19 11:22 pm
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MarcB Online Content
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My 68 has one vented cap without the baffling behind it. Just a small hole in the slot.

Re: Need vented primary plugs? [Re: MarcB] #786436 10/07/19 6:50 am
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Allan Gill Online Happy
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Originally Posted by MarcB
My 68 has one vented cap without the baffling behind it. Just a small hole in the slot.


Most of mine do. Must be what the stores had in so the just added a small hole to let it breath.


beerchug

Moderated by  Allan Gill, Jon W. Whitley 

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