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1960 ES2 mainshaft length #701186
07/09/17 9:02 am
07/09/17 9:02 am
Joined: Oct 2007
Posts: 66
Hinckley Leicestershire Englan...
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bthtony Offline OP
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Does anybody know the length of the single AMC ES2 gearbox mainsheet length. A distance over the end splines will do. I know there shorter than the Dommi twins but they all look the same without one agains the other.
Cheers Tony

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Re: 1960 ES2 mainshaft length [Re: bthtony] #701381
07/10/17 9:30 pm
07/10/17 9:30 pm
Joined: Aug 2001
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Oztralia
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Rohan Online content
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The 1962 Parts Book sez the mainshaft was common across all models.
Would this not have applied for 1960 also ?

Re: 1960 ES2 mainshaft length [Re: Rohan] #701434
07/11/17 11:19 am
07/11/17 11:19 am
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bthtony Offline OP
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As the single crankcase is not so wide as the twin I am sure it is shorter or how does the clutch line up with the engine sprocket. I could be wrong (again)

Re: 1960 ES2 mainshaft length [Re: bthtony] #701503
07/11/17 10:40 pm
07/11/17 10:40 pm
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The race versions (Manx, 7R etc) did have shorter shafts, but the road models just spaced their gearbox etc so it all lined up.
In preAMC days, the engine sprockets came in a variety of offsets.
You had to be sure to select the variety that suited your setup, so the chains/sprockets lined up.

Re: 1960 ES2 mainshaft length [Re: Rohan] #703689
08/02/17 4:55 pm
08/02/17 4:55 pm
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bthtony Offline OP
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I found there are 4 different mainshaft lengths. The Commando with circlip grove, The Dommi and single, Manx and finaly 7R /G50 being the shortest. I found the G50 one to be the one with belt drive and Newby clutch on the ES2.

Re: 1960 ES2 mainshaft length [Re: bthtony] #703730
08/02/17 10:19 pm
08/02/17 10:19 pm
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Rohan Online content
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Ah, if you'd mentioned the belt drive and clutch and that it was a race bike (?) and not std.....

Re: 1960 ES2 mainshaft length [Re: Rohan] #703967
08/04/17 8:50 pm
08/04/17 8:50 pm
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bthtony Offline OP
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It was my race bike 25 years ago but it's a spare motor I never used. Weslake crank Carillo rod 86x86 bore and stroke etc. Sorry I should have said it was a belt drive.
Tony

Re: 1960 ES2 mainshaft length [Re: bthtony] #703987
08/04/17 10:33 pm
08/04/17 10:33 pm
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Rohan Online content
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Aha, that sounds quite special then.
What did you use for a cylinder head.
And a cylinder, for that matter.
Are you going to roadbike it then ?

Someone locally-ish has a similar sounding racebike, with an extensively modded head.
Much downdraft and swirl added, beats manxes. Calls it an ES3.

Re: 1960 ES2 mainshaft length [Re: Rohan] #705902
08/23/17 5:13 pm
08/23/17 5:13 pm
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bthtony Offline OP
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The head is off the 350 M50 much modified. The ex valve is to big on the ES2. The barrel is one of my own. I had patterns made in the early 90's which I made many ES2 and M50 barrels. Mike Pemberton had many off me and eventually I sold the patterns to him.
The bore and stroke are 86 x 86 with a Weslake rod. and race cams. It's just a road bike but I am just using bits up I have had for years.
I know the bike you are talking about but can't remember the guys name. He came to see me years ago while he was in the UK


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