Banshee Chad Posted April 26, 2011 Report Share Posted April 26, 2011 Hey guys, 2006 with cpi inframes, K&N on proflow adapter and no lid, and tors removed at 5k feet asl. So ive been running rich since new, recently with current mods at 280 mains, needle at 2 notch from blunt, stock pilots. And it spits oil out the back, plugs are always wet. But it ran good in power band, low good, and mid decent but bogg right before power band. I always just ran in power band and no probs. So I decided to finally stop being a wuss and lean it a little. Went to 270 mains, needle in middle, and stock pilots. It runs awesome low and mid, I can putt around barely on throttle and give gas and it goes. But it seems like it wants to die right before powerband, almost as if I should downshift, then it hits hard and rips for a bit then seems like its running outta gas. Like when my floats werent adjusted good. Floats are good now, plugs looked good, light tan colored. I did have a plug vibrate out too on sat, guess after pulling to check jetting so much I should have put new ones in, crush gasket must be worn. Any ideas? Am I too lean maybe, or still too rich. After riding, the silencers still had a little oil on them, but wasnt dripping like before. Quote Link to comment Share on other sites More sharing options...
Geoff Posted April 26, 2011 Report Share Posted April 26, 2011 (edited) Having a plug vibrate out is caused by detonation...so I would think it's lean on top. The oil coming out the pipes is probably because your running your premix rich. When I ran my bike on gas I used Amsoil Saber and ran it 100:1 and know of guys that ran it 120:1 on gas. It coats very well since it's seems to be a little thicker than the "normal" stuff out there. I would throw a 320 main jet in it with new plugs and see if that solves the laying over problem. Edited April 26, 2011 by Geoff Quote Link to comment Share on other sites More sharing options...
06specialedition Posted April 26, 2011 Report Share Posted April 26, 2011 Does the bike run good with the 270's in the summer? Maybe its lean because its cold here still. 270-280 should be really really close. My buddy with CPI's, Pod Filters, and Cool Head runs 280's in the summer. To give you an idea my aggressive dune port, CPI's, Vforce 3's, pods, +4 Timing.....etc runs 310 mains in the summer with needle second notch from blunt end. So I would imagine you would be a few sizes smaller than me with stock porting. I would leave the needles on the second notch from the top, and throw your 280's back in, or even some 290's wouldn't hurt. Oil on the end caps is normal, mine does it too. I'd rather be a little rich than too lean. -Zach Quote Link to comment Share on other sites More sharing options...
Banshee Chad Posted April 26, 2011 Author Report Share Posted April 26, 2011 Been running the 280s year round. But it bogged bad till top end. With the 270s it ran great, better mid than ever. Just seemed like it was dying right before band hit, then would seem like it ran outta gas after climbing sand mountain. Im puzzled, 280 seemed rich and 270 lean... Ill get the plugs out and post some pics. Quote Link to comment Share on other sites More sharing options...
Wildcardracing Posted April 26, 2011 Report Share Posted April 26, 2011 Chad, 270 is going to be too lean in the weather we had at easter out here. 280-290 is where you'd want to be. You might get away with 270's in the middle of summer when the weather is warmer. But, 280's is what I always reccomend with Cpi's on a stock port motor. We do however usually set them up with dual pods, I've not tested with the pro-flo but still sure you were lean. -Brandon Quote Link to comment Share on other sites More sharing options...
Banshee Chad Posted April 26, 2011 Author Report Share Posted April 26, 2011 Chad, 270 is going to be too lean in the weather we had at easter out here. 280-290 is where you'd want to be. You might get away with 270's in the middle of summer when the weather is warmer. But, 280's is what I always reccomend with Cpi's on a stock port motor. We do however usually set them up with dual pods, I've not tested with the pro-flo but still sure you were lean. -Brandon Ok, thanks Brandon. Ill switch back to the 280. What about the bogg from idle to full throttle? Quote Link to comment Share on other sites More sharing options...
Wildcardracing Posted April 26, 2011 Report Share Posted April 26, 2011 Chad, you might try tuning on your air screws then re-adjusting the idle Quote Link to comment Share on other sites More sharing options...
Banshee Chad Posted April 26, 2011 Author Report Share Posted April 26, 2011 Chad, you might try tuning on your air screws then re-adjusting the idle What you think about the needle? Middle or 1 to blunt? Quote Link to comment Share on other sites More sharing options...
Wildcardracing Posted April 26, 2011 Report Share Posted April 26, 2011 CPI's usually want it one clip lean from center at our elevation..then richen the pilot circuit and main in the colder weather Quote Link to comment Share on other sites More sharing options...
Banshee Chad Posted April 26, 2011 Author Report Share Posted April 26, 2011 CPI's usually want it one clip lean from center at our elevation..then richen the pilot circuit and main in the colder weather Sweet, thanks man! Guess theres just no gradual climb to power band. Its all or nothing.. Quote Link to comment Share on other sites More sharing options...
FullThrottle_06' Posted April 27, 2011 Report Share Posted April 27, 2011 This thread is pretty close to the problem that I am currently going through. I live in extreme west ark. (10 mins from OK. state line) 500 elev. FMF fatties, power coreII sliencers, pods w/ no air box, tors delete on stock carbs. Im bogging like crazy on the low to mid range. Tore the carbs apart this weekend to investigate what my setup was because I just bought this bike about a month ago and I have only got to ride it a hand full of times. 320 Main, 25 pilot, needle on 4th clip from the blunt endI(rich). I contacted F.A.S.T. Racing for a litttle guidance and spoke with them about what my problem was and was givin advice to step down to a 290 or a 300 main and a 27.5 pilot, then play with the needle position. I agree to this because I feel at the elev. i'm at that I'm setup WAY to rich at the moment. I have an adjustable timing plate I bought recently but I am waiting to get the tune right before I put it on. Advice on this matter would be great and much appreciated. Quote Link to comment Share on other sites More sharing options...
Banshee Chad Posted April 27, 2011 Author Report Share Posted April 27, 2011 Thanks everyone. Ill try stepping back to 280, and mess with the rest. I thoight the 280 was way too rich as my plugs were always wet. Maybe its just too rich in middle. Does one main size make that big of a diff on the needle? You being at 500 ft, id think ud need to be alot more rich than me. Gues a main size is a lot more of a diff than I thought. And 06special edition having an aggressive dune port and only a few sizes larger on mains baffles me.. Well, again guess one size make a bigger diff than I thought. Quote Link to comment Share on other sites More sharing options...
06specialedition Posted April 27, 2011 Report Share Posted April 27, 2011 Thanks everyone. Ill try stepping back to 280, and mess with the rest. I thoight the 280 was way too rich as my plugs were always wet. Maybe its just too rich in middle. Does one main size make that big of a diff on the needle? You being at 500 ft, id think ud need to be alot more rich than me. Gues a main size is a lot more of a diff than I thought. And 06special edition having an aggressive dune port and only a few sizes larger on mains baffles me.. Well, again guess one size make a bigger diff than I thought. Yeah the mains control quite a bit from 3/4-WFO. I put 320's in and fouled plugs.....310's run hard on top but still are rich enough to be safe. Just remember, the colder temps outside you need a size or so bigger (colder air is denser than warm air), the warmer outside you could drop a size. I could probably get away with 300's and needle in middle, but that would be in the dead heat of the summer...so I stick with 310's and needle on second from blunt for year around. Like Brandon said, at this elevation most bikes run best with needle second notch from the blunt end. Mine was super boggy at mid throttle when my needle was on the center notch. You could even try a 290 main, and needle clip all the way to the top. I've even heard guys running the needles all the way lean out here at 5000ft. Quote Link to comment Share on other sites More sharing options...
Banshee Chad Posted April 27, 2011 Author Report Share Posted April 27, 2011 Thanks zach, ill change mains and try messing with needle. Guess its just all or nothing.. Better rich than lean. Quote Link to comment Share on other sites More sharing options...
06specialedition Posted April 28, 2011 Report Share Posted April 28, 2011 Thanks zach, ill change mains and try messing with needle. Guess its just all or nothing.. Better rich than lean. PM Sent Chad Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.