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Author Message   Dfbutler Posted on Saturday, March 29, 2008 - 03:17 pm:        I've got a 1250 kit and 10.5 pistons. I just changed plugs and it seems to be pinging much more than it used to. I put in NKG Iridiums. Should I try a different heat range?   89rs1200 Posted on Saturday, March 29, 2008 - 09:18 pm:        Sound like you need to back off the advance or use higher octane fuel.   Bluesboy Posted on Saturday, March 29, 2008 - 10:10 pm:        Don,did it ping with the plugs you replaced? were they the same heat range?   Xldevil Posted on Saturday, March 29, 2008 - 10:52 pm:        Riding the 1250cc myself,I+m happy with the NGK DCPR9EIX plugs Ralph   Bad_karma Posted on Sunday, March 30, 2008 - 02:05 am:        My 1250 runs just fine on the stock plugs. Sounds like a fueling issue. Don't let this go on for too long. Joe   Chasespeed Posted on Sunday, March 30, 2008 - 03:55 am:        DF which plugs are you running? Yes, try to cool it down one range at a time... Better yet, go to the coldest they have(what I am running), and go from there... Chase

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