you know a 700hp truck will pig jump a bit if you ask it to pull 60ton up a hill too,if you miss a gear it will bog down and you will be forced to drop down gears to bottom cog and crawl up hill....
if you have,as you say changed chain till its trying to rip into it...yip it will bog down,slow down ,dig them dogs in and just let it cut,they love lots of revs as havent huge horse power to do job... its all a balancing act.
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