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Re: Ariel twin

Posted: Sun Jun 23, 2019 7:10 am
by Leejm
Out of interest what do people balance the crank too?

Re: Ariel twin

Posted: Sun Jun 23, 2019 8:13 am
by nevhunter
Same as the singles 65% but do it dynamically as the shaft is fairly wide. This requires special weights to be fitted to the crankpins. Pretty similar to the early speed twin/ tiger 100 triumphs.. I will have to get around to doing mine some day.. (and cleaning out the oil galleries.) I have a few spare timing covers of various years. .if you are stuck. Oh and a brand new early head. small finned. Doesn't fit mine. Well it does but the fins don't line up. It would still run fine.. There's differences in push rods , rockers and camshafts cam gears. Triumph pistons fit but the gudgeon pins are a few thou different in diameter. Nev

Re: Ariel twin

Posted: Sun Jun 23, 2019 9:52 am
by Vincent.vanGinneke
Early cranks have one oil hole for each conrod, later cranks have two oil holes each.
On the pic a later crank, oil holes are opposite of eachother.
Early ones have it facing towards mainshaft / inside.
KH crank 1955.jpg

Re: Ariel twin

Posted: Sun Jun 23, 2019 4:56 pm
by Leejm
Cheers gents. The cams changed I believe but is there any difference in power between the two?

Re: Ariel twin

Posted: Sun Jun 23, 2019 5:50 pm
by Leejm
Well what I have been told the bike all there apart from. Petrol tank oil tank. Engine and gearbox. no engine plates. And no primary cases.
So far been offered an engine
Offered a tank, thanks Simon
And primary cases.
So all is looking good to get a complete bike!

Re: Ariel twin

Posted: Sun Jun 23, 2019 8:47 pm
by paul.jameson
Lee,

Have a chat with Sean O'Brien about spares. I think you will find that he has lots available for the iron engined KH.

Paul

Re: Ariel twin

Posted: Sun Jun 23, 2019 8:54 pm
by Leejm
Cheers Paul. Could you tell me if its correct that early 51 had a chrome tank and in that year they moved to all painted tanks.

Re: Ariel twin

Posted: Tue Jun 25, 2019 9:26 pm
by tonyh
You could always pop a Triumph engine in there Lee.

Re: Ariel twin

Posted: Tue Jun 25, 2019 9:36 pm
by paul.jameson
Yes Lee, part way through the 1951 season, the chrome ran out - or actually, I believe, the nickel to go underneath the chrome. If you PM me the engine and frame numbers, I should be able to tell you whether the bike came out before the chrome ran out or after.

Re: Ariel twin

Posted: Thu Jun 27, 2019 5:24 pm
by Leejm
Cheers Paul I'm going tomorrow so I will let you know the outcome!