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General Category >> Rubber Side Down! >> Spark plugs.. Standard or Hotter range?
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Message started by s40guy on 05/28/14 at 18:36:51

Title: Spark plugs.. Standard or Hotter range?
Post by s40guy on 05/28/14 at 18:36:51

What plug do you use? Right now I am using NGK DP8EA-9. Been looking at the NGK DP7EA-9 which is a hotter plug as I mainly do a lot of lower speed riding. My plug has some black soot stuff on it using the standard plug. Has anyone ever tried the hotter range plug? If so do you or did you like it, hate it, etc.? Also does resistor plugs matter much? Thanks, S40 Guy.

Title: Re: Spark plugs.. Standard or Hotter range?
Post by paulmarshall on 05/28/14 at 22:05:07

I don't know about the Savage but the only experience I have had with hotter plugs was with a old car that burnt oil, and the hotter plug helped to run better. Other wise stick to the plug that recommended.

Title: Re: Spark plugs.. Standard or Hotter range?
Post by WD on 05/28/14 at 23:40:13

My 98 with 155 over 55 jetting ran an NGK DPR5EA-9, anything else fouled out in a week to a month. Bike smoked like a 1970s Kenworth. ;D

Title: Re: Spark plugs.. Standard or Hotter range?
Post by Dave on 05/29/14 at 04:52:35

If your bike is jetted properly.....the stock plug should work just fine.

Title: Re: Spark plugs.. Standard or Hotter range?
Post by shorty on 05/29/14 at 05:34:10

I dropped the resistor, spark noticeably larger..
only difference is cold morning starts are quicker