Quote:
Originally Posted by Nutcracker
There's 2 things I've learned from Russian videos. #1 is the thickness of the head gasket that was added to reduce compression. By reducing compression this reduced NOX & CO2 gas's to a level for EPA approval in US market. Removing a layer of the head gasket increases the compression to a little above 10:1. #2 is Flywheel keys or advancing the timing by 4° to 8°. This probably also had to do with EPA Emission standards. For these reasons this could be why we see the HP range on this motor at 19 to 26HP. Very good reviews on the 4° keys. Supposedly 8° is to much advance and your overheating & melting stuff.
|
I think the manual quotes 14 horse for the X7.
Going from whatever it is we have (14, 19, somewhere in between) to almost 30 would necessitate changing sprockets in a hurry.