KH engine in a single frame

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dave.owen
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KH engine in a single frame

Postby dave.owen » Thu May 21, 2020 8:48 am

Has anyone tried putting a all iron KH engine in a rigid single frame.

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Keith.owen
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Re: KH engine in a single frame

Postby Keith.owen » Thu May 21, 2020 9:41 am

Hi David,
I haven't however, I do know that the front down tube angle is different. See the attached, it might be of help?




Arial rigid frame 2.jpg


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Re: KH engine in a single frame

Postby klaus gerhard » Thu May 21, 2020 2:55 pm

I think Fred from the Netherlands has a single engine in a twin frame, if I remember correctly.
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Re: KH engine in a single frame

Postby tony.barnett » Thu May 21, 2020 3:09 pm

klaus gerhard wrote:I think Fred from the Netherlands has a single engine in a twin frame, if I remember correctly.
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Re: KH engine in a single frame

Postby Simon.Gardiner » Thu May 21, 2020 3:43 pm

As Ariel (who otherwise had a strong inclination to stick with existing components) felt they had to produce a different frame for the 500 twin engine I am persuaded that you can't fit the twin engine straight in a singles (rigid) frame, some frame mods are needed, not just different plates.
I'm not sure that doing the reverse (putting a singles engine in a twin frame) helps any with the original question.
So I guess the question is, how big are the frame mods?
(Having seen some of the engineering work done by forum members I'm pretty sure all things are possible though!)

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Re: KH engine in a single frame

Postby tony.barnett » Thu May 21, 2020 3:51 pm

Well, to put a single engine in a twin frame all you need to do is change the front engine plates (using swingarm single plates). It would seem sensible therefore that to go the other way you would need to do the same (meaning change the front engine plates). I can't believe that you would need to modify the frame - they are not that different.

On a slightly related point - Justin Baker has a Huntmaster engine in a rigid frame, presumably single in origin. Might be worth asking him.
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Re: KH engine in a single frame

Postby nevhunter » Fri May 22, 2020 1:56 am

There are differences in the wall thickness of the tubing of some otherwise similar frames according to Bacon if my memory serves me correctly. The twin 500 does not need to be as heavy as the VH for instance. The engine driveshaft to gearbox driveshaft distance is the same. My inclination would be to look around for the correct one before altering frames if at all possible.. Someone should need the one you have. With significant frame damage or severely rusted sections major frame work is required. Perhaps use remains of 2 to make ONE..I've had to do that and if and when that's done we have an obligation to ourselves and any subsequent owner to ensure it's done properly. Nev


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