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Classic, Vintage & Veteran For Coventry and Meriden Models. Anything pre-Hinckley goes.

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Old 11-02-2012, 04:40 PM   #1 (permalink)
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Pre unit twin primary measurement Help

I'm planning on makeing some engine plates, for a long chaincase triton.
I have templates for a short chaincase engine plates.

If someone could give me the inner chaincase measurements of a short inner primary I think I could make them.

I think the overall measurment and the distance on centre of the two holes would be all I need.

Pre unit of course

Thanks for any help.
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Old 11-03-2012, 09:13 AM   #2 (permalink)
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Hi John,took some pics of some old parts I've got from my Triton.It's a pre-unit T110,dynamo/generator model (so no alternator),so it would be a long primary chaincase.The frame is a wideline,and the gearbox is a slickshift type.
I've tried to i.d the holes with letters.so let me know which dimensions you need.
Tommo.


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Old 11-03-2012, 11:12 AM   #3 (permalink)
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Tommo

Thanks very much, the measurement s I'm looking for are

1- the inner chaincase overall length

2- the centre to centre distance of the two large holes in the chaincase

I've already got patterns for the engine plates with short chaincase, so I figure if I know the difference on centres engine to trans, I can just add that to the rear engine plates, so they fit the long chaincases i have.

I can't be sure looking at the pic, but i think yours is the short swingarm chaincase, which is exactly the info i need.

What is the hole B in engine plate for, that is not on my pattern?

Thanks

John
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Old 11-03-2012, 12:00 PM   #4 (permalink)
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Overall length is 16 3/4",and the distance of the shaft holes is 9 1/4"
Hole B lines up with hole H in the inner chain case,screwed rod fits through them with spacers to the timing side plate,also goes through the outer primary case(think that's where the foot rests bolted to on standard bikes).

Last edited by TritonTommo; 11-03-2012 at 12:10 PM.
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Old 11-03-2012, 12:07 PM   #5 (permalink)
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Quote:
Originally Posted by TritonTommo View Post
Overall length is 16 3/4",and the distance of the shaft holes is 9 3/16".
Hole B lines up with hole H in the inner chain case,screwed rod fits through them with spacers to the timing side plate,also goes through the outer primary case(think that's where the foot rests bolted to on standard bikes).
Thans very much,maybe I better get the measurement a-b and c-b as well then if you don't mind.
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Old 11-03-2012, 12:11 PM   #6 (permalink)
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Ok...I've edited one of the above measurements.
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Old 11-03-2012, 12:21 PM   #7 (permalink)
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A-B is 1 7/8"
C-B is 1 7/16"
And hole B is 7/8" from the curved edge of the plate.
Hope this helps....Tommo.
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Old 11-03-2012, 02:45 PM   #8 (permalink)
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Quote:
Originally Posted by TritonTommo View Post
A-B is 1 7/8"
C-B is 1 7/16"
And hole B is 7/8" from the curved edge of the plate.
Hope this helps....Tommo.
Thanks again, just to be sure all these measurements are centre to centre?

Are you building a triton, or have built one, any pics?
All i've got is parts.
Keeps getting put on the back burner.
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Old 11-03-2012, 02:57 PM   #9 (permalink)
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Quote:
Originally Posted by TritonTommo View Post
A-B is 1 7/8"
C-B is 1 7/16"
And hole B is 7/8" from the curved edge of the plate.
Hope this helps....Tommo.



And hole B is 7/8" from the curved edge of the plate.
^^^^ To centre or near edge?
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Old 11-03-2012, 04:05 PM   #10 (permalink)
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Quote:
Originally Posted by johnod View Post
And hole B is 7/8" from the curved edge of the plate.
^^^^ To centre or near edge?
Yes,all measurements are from hole centres.
Parts in the pics are spare parts,I made a new set of engine plates.

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