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If I was to put new 11:1 pistons and rings into my 400ex would there be anything else that would be good to do? And will it hurt my engine if I just get 11:1 pistons and rings with nothing else done? Also how much of a performance gain would 11:1 pistons give?
99 400ex, Graydon Proline Silencer/Headpipe, Jet kit, Turf Tamers on back, Holeshots in front, K&N Air Fillter, Moose Handlebars, DG Nerf Bars. 416 on the way
Too much bike for me
It won't hurt it, but I would at least consider a drop in cam or something like that. You probably wouldn't notice a whole lot out of just a piston, but get a good cam and carb and she starts to open up.
-Kevin-
GNCC #444
2013 Junior B Champion
Thanks to my 2014 sponsors:
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Senior Member
if you have it torn apart might as well put a cam in it too. the carb isnt quite as necessary. if you're planning on running a higher compression piston make sure you run a little higher octane too.
GNCC #107
2005 sponsors:
For Dirt Only, Troy Racing, Klotz, Simpson/GS3, SixSixOne, Scott Goggles, Factory Effex, Twin Air, RK Racing Chains, Works Connection, Lester ATV, Cycra, DP Brakes, Outerwears
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