Posted by Russ from MN on April 16, 2022 at 13:14:07 from (208.107.58.196):
In Reply to: Re: 430 John deere posted by Willow Lane on April 16, 2022 at 11:17:15:
Willow, there are many 2 cylinder 4 stroke engines that the pistons do go down together, and they actually run quite well. I have driven Triumph motorcycles for 50 years, and on most of the twins the pistons travel together, offset by a counterweight on the crankshaft. They run well up to 7,000 rpm or more, and Honda used that design, and some of their engines run over 10,000 rpm. The one problem with that design is you get crankcase pumping, and it's harder to meet emission standards.
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