DGFUNNY70 Posted June 27, 2011 Report Share Posted June 27, 2011 http://s1211.photobucket.com/albums/cc436/dgfunny70/?action=view¤t=DSC00350.jpg Here is my first plug chop that looks successful to me. I'm at about 1000 feet above sea level and 77 degrees today. I am running 50/50 Sunoco 110 and premium gasoline and 50 to 1 amsoil. The rings on the plugs are about 1mm tall I would say. All my mods are in my signature for the bike. It’s been a few months sense the filters were cleaned maybe ridden about 50 hours or so I would guess. I was thinking I'm about a main or so lean from having it pretty much dead on. I also have a set of iridium plugs I was thinking of trying out but before I do that I think I will up my mains a size or two what do you think. Now I realize that 2mm is optimal for reliability would richening it up to 2mm affect the horse power and how much just curious. Quote Link to comment Share on other sites More sharing options...
ECshee Posted June 27, 2011 Report Share Posted June 27, 2011 If it needs to be fattened up go for it. I would much rather run fat, than lean. You will not lose power from being 1 size up, Quote Link to comment Share on other sites More sharing options...
DGFUNNY70 Posted June 27, 2011 Author Report Share Posted June 27, 2011 I guess I should have asked a different question's. I know for a fact that changing even one jet size can affect HP + or - 1 so. The 2mm rule on a plug chop is to get maximum HP and reliability out of you engine with the least give or take. I have posted a few pictures on photobucket and given you a link to look at them. What I would like is a few jetting experts to look at them and see if they can give me an idea where to go from there. The pictures may not be the greatest so from what I can see there is about a 1mm ring light black or possible gray on the base of the plug for those who know should I go 350 or 360 mains and sence I started tuning from the bottom up do you think I will have to change any of the other circuits. Thanks in advance for your good advice. Quote Link to comment Share on other sites More sharing options...
dirtydownunder Posted June 28, 2011 Report Share Posted June 28, 2011 cant really gauge when using race gas, id like them a bit darker. but it could be right with the 50% race gas. hows it feel ? and with fatter jets in it, how does it feel ?, if it feels the same with fatter jets, run the fatter ones. keep richening it up untill you feel a it getting worse, then lean it off one. Quote Link to comment Share on other sites More sharing options...
DGFUNNY70 Posted June 28, 2011 Author Report Share Posted June 28, 2011 Well up top it feels pretty strong and I have ran 350's in the past and believe that they were consistent with the 340's but I have never ran anything bigger than that. I will have to try some bigger jets and come back with the results. As you can see from my plugs with the 340's both plug chops were consistent with each other so I was at least able to duplicate my results. Quote Link to comment Share on other sites More sharing options...
bigborebanshee Posted June 29, 2011 Report Share Posted June 29, 2011 Personally if your running this quad in trails then i would leave it alone.If its a duner or dragger, you might want it a little fatter. Quote Link to comment Share on other sites More sharing options...
Strm Trpr Posted April 20, 2012 Report Share Posted April 20, 2012 I know this is old as dirt, but what happened to this motor? Are those tiny specks of vaporized aluminum on the electrode straps? Quote Link to comment Share on other sites More sharing options...
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