crustydemon Posted November 20, 2009 Report Posted November 20, 2009 Well, on the new bike I got I removed the fattys and put the PT mids on, put on the Noss head with 21 cc domes, installed the 2 stage reeds,k+n pods, and bumped the timing up 4 degrees. It had 250 mains and I put 280's in for a starting point. Do you think it will be safe to try these or should I bump it up more? Cylinders are not ported and im at 1400 ft, 55 degrees. Quote
98_shee Posted November 20, 2009 Report Posted November 20, 2009 I'de start around 320 main 27.5 pilot. Quote
dajogejr Posted November 20, 2009 Report Posted November 20, 2009 With pod filters and 55 degree weather, I'd say 320 to 340... And ditto on the pilots., 27.5 Quote
crustydemon Posted November 20, 2009 Author Report Posted November 20, 2009 Are you serious? What do I have makes it need that much? I'll try it though, better safe than sorry. All I gave for pilots are 25's and then my next smallest ones are 35's I have putted it around the yard and pulled the plugs and they are very brown and a little wet (they were new) Quote
dajogejr Posted November 20, 2009 Report Posted November 20, 2009 The pod filters and aftermarket pipes increase your need for jetting. The 55 degrees and 1400 feet of elevation cancel each other out. You could very well be ok on the pilot, etc. But putting around compared to a WOT run under a load is different than putting around. Do a proper WOT plug check. Better safe than sorry... 35 pilots are WAY to big. Try the stock 25 pilots with .5 to 1.0 out on the air screw.... Quote
crustydemon Posted November 20, 2009 Author Report Posted November 20, 2009 The pod filters and aftermarket pipes increase your need for jetting. The 55 degrees and 1400 feet of elevation cancel each other out. You could very well be ok on the pilot, etc. But putting around compared to a WOT run under a load is different than putting around. Do a proper WOT plug check. Better safe than sorry... 35 pilots are WAY to big. Try the stock 25 pilots with .5 to 1.0 out on the air screw.... Ok, Thanks for the help, I'll try it. The guy I got it from had the 250 mains in it with the fattys and pods but that was it. I thought It ran really strong but maybe it was just too lean. Quote
dajogejr Posted November 20, 2009 Report Posted November 20, 2009 Every bike is different. Every stock motor with bolt ons, pipes and pods have been just that, 320 to 340 mains. As long as you follow this properly, whatever the main jet ends up being is it...but I'd much rather start a little rich and buy a few plugs vs. a top end... http://www.dfn.com/benkaren/plugchop.html Quote
crustydemon Posted November 20, 2009 Author Report Posted November 20, 2009 Better safe than sorry is right, I'll give it a try tomorrow. I have been having trouble getting my 4 mill jetted and I bet I am way lean on it, I got 160's in it right now. What is the difference in the feel of a way rich bike compared to a way lean one?Mine doesnt want to rev out. Quote
dajogejr Posted November 20, 2009 Report Posted November 20, 2009 A rich bike is blubbery, like it won't take the throttle... A lean bike sounds "revvy" or tinny...like it's revving just no power there. a lean bike revs quicker usually too...too quick. Quote
98_shee Posted November 20, 2009 Report Posted November 20, 2009 (edited) The 4mill may be rich. I think i ended up at 155 or 158 (cant remember it may even be lower than that). If its rich it wont rev out like you are saying. Edited November 20, 2009 by 98_shee Quote
crustydemon Posted November 20, 2009 Author Report Posted November 20, 2009 Alright, I may just jump down to a 155 and try it on that one. The thing that bothers me is that with the 160's the plugs were still white, one of them had a very little brown at the base of the insulator.Its becoming a real headache. Quote
98_shee Posted November 20, 2009 Report Posted November 20, 2009 If your plugs are white your lean, do a plug chop and check for air leaks. What size pilots and where is your air screw set? Quote
crustydemon Posted November 20, 2009 Author Report Posted November 20, 2009 Pilots are 48's, 1 1/2 turns out. Its a new motor and I did a leakdown when I built it. Someone said maybe it was washing the plugs clean but I doubt it, they were not wet. Quote
dajogejr Posted November 20, 2009 Report Posted November 20, 2009 If the bike is jetted right on the main it will leave a smoke ring on the base of the porcelain from a proper WOT chop. The rest of the porcelin nose will take time to color...trust me. If it's white down at the base after a warmed up WOT run on fresh plugs, then yes...you are lean. But don't mistake the rest of the porcelain for the small ring you want to see at the base. Quote
crustydemon Posted November 20, 2009 Author Report Posted November 20, 2009 Its the small ring that i'm looking for. one plug was just barley starting to show a very faint ring with the 160's but it was a real dog. 165 is the biggest I have so i think I'll throw them in and give it a shot. I have a feeling that i'm going to go through a lot of plugs in the next couple days. How much of a difference does 1 or 2 jet sizes make in the way the bike feels? Quote
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