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[QUOTE="canyncarvr, post: 319763, member: 16552"]
Marlin:
You're referring to plugs, I presume? The first you've heard of running a 7 heat range plug?

I thought just about everyone ran 7s in the newer kdx series.

Anyway..you should.  The 7 will run considerably cleaner, cuz it will run the engine hotter...say around 25º or so.  The general idea is that plug choice is 'safe' from kawi just as jetting is...but not optimal.  The heat range the engine operates in when using a 7 is closer to what it should be than an 8 is.  And heat is important in 2-strokes considering pressure wave harmonics.  All other things being equal, a 2-stroke running in a 'proper' heat range will make considerably more power than one running cooler than 'proper'.

(std disclaimer applies to all..imo, I think, imHo, etc)

Oh..I don't think you'll find a BR7ES.  I haven't, anyway.  Just a B7ES (no 'r').  Don't worry about it.  Unless you run an EV (fine wire) series?  The 8-to-7 thing still applies.

Check your jetting sequence if you change plug heat range.
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