badbanshee01 Posted January 7, 2006 Report Posted January 7, 2006 I recently installed some fmf fatty's and the pro design air filter kit and removed the airbox lid. I raised the clip on the needle(4th spot) and I installed 290 mains. It starts up and idles pretty good, but when I did the wot test the plugs were bare white mostly, no tan color at all. My question is how much bigger I should go up on the main? I am at 500 ft. and it's around the freezing point. Thanks for any advice you have Quote
raymo1979 Posted January 8, 2006 Report Posted January 8, 2006 (edited) I recently installed some fmf fatty's and the pro design air filter kit and removed the airbox lid. I raised the clip on the needle(4th spot) and I installed 290 mains. It starts up and idles pretty good, but when I did the wot test the plugs were bare white mostly, no tan color at all. My question is how much bigger I should go up on the main? I am at 500 ft. and it's around the freezing point. Thanks for any advice you have 456385[/snapback] Do you have stock carbs?raising the needle clip up or down is to fine tune it when your jetting is pretty close.I would put the clip back in the middle and go up on the main and then check the plugs.How does the low and mid feel? Edited January 8, 2006 by raymo1979 Quote
Shee-Male Posted January 8, 2006 Report Posted January 8, 2006 start with a set of 310's and work from there, you may wanna go up on the pilot but I think your needle position is fine, it dose not effect wot anyways. remember its better to be a little on the rich side then to lean! Quote
Banchetta Posted January 8, 2006 Report Posted January 8, 2006 I recently installed some fmf fatty's and the pro design air filter kit and removed the airbox lid. I raised the clip on the needle(4th spot) and I installed 290 mains. It starts up and idles pretty good, but when I did the wot test the plugs were bare white mostly, no tan color at all. My question is how much bigger I should go up on the main? I am at 500 ft. and it's around the freezing point. Thanks for any advice you have 456385[/snapback] You are most likely a little lean w/ the colder temps...the 290's will be great for 50-80 degree temps, but you will need to up them a couple of sizes for 20-40 temps. If you are planning on riding in colder temps than that, then go to 320's...your plugs are probably white because your reading the porcelain and not the ground strap (finger). If the plugs are new,then they will be harder to read, put a couple of hours on them or ride it for the day, and at the end of the day, do another plug test. Read the end of the plug. the outer circle should be black and as it comes onto the finger, the color should turn to brown at the corner of the finger and stay brown on the tip. Quote
badbanshee01 Posted January 8, 2006 Author Report Posted January 8, 2006 (edited) You are most likely a little lean w/ the colder temps...the 290's will be great for 50-80 degree temps, but you will need to up them a couple of sizes for 20-40 temps. If you are planning on riding in colder temps than that, then go to 320's...your plugs are probably white because your reading the porcelain and not the ground strap (finger). If the plugs are new,then they will be harder to read, put a couple of hours on them or ride it for the day, and at the end of the day, do another plug test. Read the end of the plug. the outer circle should be black and as it comes onto the finger, the color should turn to brown at the corner of the finger and stay brown on the tip. 456567[/snapback] But I thought you were supposed to do the test with a brand new plug and do wot for about 10 seconds. If I would ride around usual, the plug would probally turn black . I don't want to ride it anymore since I believe it is lean on the main I think.I have just been reading the porcelain on the plug(the white stuff) Where is the ground strap at? It starts right up and Idles good, which tells me the pilot is good. The low end is OK, but not right. The mid is not all that great either, probally worse than the low and mid. Once I get it in the powerband up top, which seems like a higher rpm than stock, it runs pretty good at wot but it does studder sometimes. So, what do you think I should step up too? How should I do my plug test? Thanks alot Edited January 8, 2006 by badbanshee01 Quote
badbanshee01 Posted January 9, 2006 Author Report Posted January 9, 2006 Should I ride around for about a half hour not letting it idle and then at the end do a wot test? The plugs would turn black when I start it cold and I don't think a plug will turn black to tan. In my 10 second wot test the plugs were white. I don't know if this is the proper way to test them though. I am thinking about 320 mains. Quote
s-540 Posted January 9, 2006 Report Posted January 9, 2006 (edited) you would need new plugs if you were doing a plug chop. if you are trying to get it close it will probly take a couple of times to get your carbs set up then get a new set of plugs and do a plug chop. Edited January 9, 2006 by s-540 Quote
2003LimitedBanshee Posted January 9, 2006 Report Posted January 9, 2006 Should I ride around for about a half hour not letting it idle and then at the end do a wot test? The plugs would turn black when I start it cold and I don't think a plug will turn black to tan. In my 10 second wot test the plugs were white. I don't know if this is the proper way to test them though. I am thinking about 320 mains. 456877[/snapback] I had a set of plugs that I had been running for several months, when my bike was stock, that I initially ran after installing my T5's. The plugs were quite dark, although they did not foul. I installed my T5's, 2:1 air filter, and installed Toomey's "Perfect Jet Kit" with 280 mains. I warmed the bike up, and did a WOT plug check (not chop, which I question the need for), and the plugs had turned nearly white, not even close to tan. This was of course because the mains were to lean. The moral of the story... if you're lean it will clean and whiten up those plugs you've been running without a doubt (and that's not necessarily a good thing). Quote
Banchetta Posted January 9, 2006 Report Posted January 9, 2006 Like 03LE said, get some color on them, once you do a wot test, then plugs WILL change color...you'll be surprised what happens at 1200 degrees!!! Right now, I'd say your too lean w/ those temps, better to start rich and work down. Throw some 310 or 320 in there and try it out. You want to read the tip of the plug (ground strap) As for the midrange, raise the needles to the 4th clip from the blunt end. Quote
Banshee~ Posted January 10, 2006 Report Posted January 10, 2006 I would start with a 330 main and 30 pilots (with stock needles in middle slot). I was running the same setup with 320 mains in alot warmer temps. Quote
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