Tim C Posted May 4, 2004 Report Share Posted May 4, 2004 My Banshee is sputtering when I hold wide open but working great up to there. I did a plug check with fairly new plugs and the end looked lean but were black up inside the plug. The plugs are dry but I have oil coming out the end of my silencers which I didn't think was normal because it never did that before. Quote Link to comment Share on other sites More sharing options...
sredish Posted May 4, 2004 Report Share Posted May 4, 2004 My Banshee is sputtering when I hold wide open but working great up to there. I did a plug check with fairly new plugs and the end looked lean but were black up inside the plug. The plugs are dry but I have oil coming out the end of my silencers which I didn't think was normal because it never did that before. The strap on the very tip has to be a dark brown or black and the ring a brown also. As far as oil coming from the silencers, what premix ratio are you running, that would be a more likely candidate as to the problem. Quote Link to comment Share on other sites More sharing options...
Tim C Posted May 5, 2004 Author Report Share Posted May 5, 2004 I've always run Yamalube @ 32:1 and never had oil coming out the silencers until recently. Quote Link to comment Share on other sites More sharing options...
Banchetta Posted May 5, 2004 Report Share Posted May 5, 2004 Did you run the shee wide open in 6th gear for 5-10 seconds, shut it down, coast to a stop and pull the plugs? If not, then you'll get false readings.... Quote Link to comment Share on other sites More sharing options...
Tim C Posted May 5, 2004 Author Report Share Posted May 5, 2004 (edited) Yes I did the plug check right but I never seen plugs that were almost white on the tip and then black up inside. My compression is about 150 psi, what would the plugs be like if the compression is too high for the fuel? It shouldn't be the problem because I run hi-test gas in it. Where do you notice spark-knock the most when it's lugging or at high RPM? Edited May 5, 2004 by Tim C Quote Link to comment Share on other sites More sharing options...
Banchetta Posted May 5, 2004 Report Share Posted May 5, 2004 You mostly notice pin knocking at lower rpms when you have a load on the motor....Porcelain color can vary just by changing the needle position so I never use that to determine the main jets....Try this....run it for awhile to get some color on them, like old plugs, than run it wide open in 6th gear for 5-10 seconds, shut it down, coast to a stop, pull the plugs..Get the strap at the end of the plug to a chocalate brown color. If your worried about detonation, then look at the outside of the ring for any aluminum speckles...This will be pieces of the piston... Quote Link to comment Share on other sites More sharing options...
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