View Full Version : Compression on stock EX?
What is the compression ratio on a stock 400ex 2000model? im gettin a 10.1 416 wiseco kit put in at a local shop. just wondering how much better it will run? And how much getting a after market pipe will open it up? trying to watch my money
nosliw
03-19-2006, 11:09 AM
i want to say 9.1:1, maybe 9.3:1.
yes an exhaust will open it up good. i personally would make sure the engine breathes good before internal mods.
jordan_m6
03-19-2006, 11:32 AM
9:1 it is
Honda#4
03-19-2006, 12:55 PM
yea 9:1:1.
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