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May 12th, 2018, 01:32 AM   #601
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Originally Posted by jon andersson View Post
What will be left of that 0.5mm margin at extreme end play and flex? I know 1mm in total is quite alot but there will be some play in the balancer too, no?
But I guess the most extreme flex will not happen where they overlap anyway?
I have measured the play more careful now. When the crank is max to one side and the cb max to the other side, there will be 0,8-1,0 clearance. Shims are ordered! Tack för engagemanget, Jon!

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May 13th, 2018, 12:06 PM   #602
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The calculations behind the design of this cb and crank imbalances, can be viewed in this graph. The curves indicate how much the engine will move up/down (Y-axis) and to front/rear (X-axis). The curves inside the red circle is without CB and the green circle with CB. Let´s hope the improvement will be just as big IRL!
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May 15th, 2018, 12:02 PM   #603
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The new engine brackets are in place. Runned out of gas so the TIG-bonanza will have to wait!
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May 15th, 2018, 11:42 PM   #604
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I see that you did convert it to a 70 deg. I like that, best design ever
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May 16th, 2018, 04:46 AM   #605
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Originally Posted by jon andersson View Post
I see that you did convert it to a 70 deg. I like that, best design ever
coming up: Klein bottle fuel tank which is an air filter if you look in and a Swedish forest if you look out, the tank is also a lounge chair but there is a curse: you must find a small gray thing inside it and throw it away or you will have bad luck

#70degreelife
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May 20th, 2018, 01:17 AM   #606
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Now cb and crank are shimmed axially. The minimum clearance cb to crank cheeks is 1,0mm. Now assembly of the complete engine!

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May 20th, 2018, 02:12 AM   #607
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Fair play Doc your as mad as a box of frogs!
Superb work!
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May 20th, 2018, 02:44 AM   #608
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Originally Posted by Dr_C View Post
The calculations behind the design of this cb and crank imbalances, can be viewed in this graph. The curves indicate how much the engine will move up/down (Y-axis) and to front/rear (X-axis). The curves inside the red circle is without CB and the green circle with CB. Let´s hope the improvement will be just as big IRL!
Substantial difference. Well done.
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May 20th, 2018, 01:46 PM   #609
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Lovely work for sure
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May 21st, 2018, 11:47 AM   #610
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The crank also needed another "imbalance" to work with the new cb. 11500gmm on the cb and 21010gmm on the crank. After having tried 3 different balance factors, I had machined 20mm holes already in the hardened crank cheeks. I had to fill the holes again, part from a 8,3mm hole straight through.

Next step is putting the engine together!



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