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Old 12-02-2014 | 12:22 PM
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Stoneweapon
 
Joined: Nov 2004
Posts: 118
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From: AugsburgBY, GERMANY
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They are very loud but will run.

There was exhaust valve systems connected to the carb as well.
I tested an OS10 with this "exhaust system" a few weeks ago.

https://www.youtube.com/watch?v=YFaUDcQwHS0
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