Dinner Posted May 27, 2008 Report Share Posted May 27, 2008 Hey Guys, Being as I am running new carbs this year, 33 PWK's I'm not used to the jetting specs of Keihin's. Currently I am running a 160 Main and 55 Pilot, 6.0 Cut away and CGL Needle. My builder, Bob, at RB in Michigan recommended a CGM Needle. I will be getting 155 Mains, but since my local shop didn't have any, I went with 160's for now and well my top end is kinda poopy at the moment, won't rev out Question is, will an M needle be thicker in diameter than my current L needle? Right now I have needle clip on the lowest spot possible(richest spot) because anywhere else the motor cuts out due to lack of fuel. In my mind I think I should get a smaller diameter needle because even with 160 mains, I'm on the lowest clip, with 155's I might be cutting the engine out again :ermm: Quote Link to comment Share on other sites More sharing options...
shanYE west Posted May 27, 2008 Report Share Posted May 27, 2008 Yep a M dia. is thicker / leaner If your in the lowest clip position you need a shorter needle. I would try a CEK or DEK Quote Link to comment Share on other sites More sharing options...
BellicoseBanshee Posted May 27, 2008 Report Share Posted May 27, 2008 Question is, will an M needle be thicker in diameter than my current L needle? Right now I have needle clip on the lowest spot possible(richest spot) because anywhere else the motor cuts out due to lack of fuel. In my mind I think I should get a smaller diameter needle because even with 160 mains, I'm on the lowest clip, with 155's I might be cutting the engine out again :ermm: Take a look at this. :thumbsup: A little hard to read, sorry. Quote Link to comment Share on other sites More sharing options...
jbooker82 Posted May 28, 2008 Report Share Posted May 28, 2008 Middle leter is length. C is 36.35, E is 38.15, G is 39.95 Since your maxed out on needle clip postion and you still need it richer you need a shorter needle. One with E being the middle letter. 90% of people running PWK33's and PWK35's run CEL Needles. DEK needles work great in the older PJ34mm carbs. The 160 mains are probaby to rich. Most people run 150-155 range. Pilots are plenty rich too. 48's would be better. Try this setup. Main 155 Needle CEL Middle Clip 48 Pilot Jet Air screw 2 turns out. This is the Keihin Jetting BIBLE DRI Keihin Jetting Tech Sheet LINK josh Quote Link to comment Share on other sites More sharing options...
burleybanshee Posted May 28, 2008 Report Share Posted May 28, 2008 Ya, the cel neddle is more than likely the way to go, 155 to 152 main, 48-50 pilot. YOu need to give a little more info like what pipes you are running and any port work, elevation, that would help us get you closer. the above jets are for your average stock banshee with pipes and filter. Quote Link to comment Share on other sites More sharing options...
Dinner Posted May 28, 2008 Author Report Share Posted May 28, 2008 Hmm, my carbs came with 52 pilots. Do you think I would be better off running those, over the 55's? 1000ft 20 degrees Celsius Aggressive Dune Port 33 PWK's K&N Pods Pro Circuit Pipes Boyesen Reeds with ported stock cages 140ish PSI for compression Stock Timing 112 Octane I'm def going to go lower on the main and try out a 155. I will also get some CEL needles and see how they treat me. Guys I won't be riding it much until I get better mains and a richer needle...don't want to blow it up :ermm: Quote Link to comment Share on other sites More sharing options...
jbooker82 Posted May 28, 2008 Report Share Posted May 28, 2008 I would deffinatly go back to the 52's since you have them. Once you get the CEL needles your probably going to need to drop down to a 48. 55's might feel better now since you have a lean needle. You should get some jets from dennis kirk they sell 5 Keihin Mains 160,158,155,152,150 for 23 bucks. Get 2 kits and you will have all the mains you should ever need. Keihin Jet Pack from Dennis Kirk LINK 48 Pilots LINK Quote Link to comment Share on other sites More sharing options...
jbooker82 Posted May 28, 2008 Report Share Posted May 28, 2008 You will probably end up at a 150-152 main. That is what I ran when I had a play port with t5's Quote Link to comment Share on other sites More sharing options...
FASTOYS Posted May 28, 2008 Report Share Posted May 28, 2008 I would deffinatly go back to the 52's since you have them. Once you get the CEL needles your probably going to need to drop down to a 48. 55's might feel better now since you have a lean needle. You should get some jets from dennis kirk they sell 5 Keihin Mains 160,158,155,152,150 for 23 bucks. Get 2 kits and you will have all the mains you should ever need. Keihin Jet Pack from Dennis Kirk LINK 48 Pilots LINK Thats alittle high priced, Craig give me a ring this morning and i can fire out some jets/needles for you today. http://www.farmandsandtoys.com/partdetail.asp?partid=73 Quote Link to comment Share on other sites More sharing options...
dajogejr Posted May 28, 2008 Report Share Posted May 28, 2008 Try this setup.Main 155 Needle CEL Middle Clip 48 Pilot Jet Air screw 2 turns out. This is where I'd set you up...but probably a 150 main to be honest. 155 will be a safe start, but I think it'll still be rich. Quote Link to comment Share on other sites More sharing options...
jbooker82 Posted May 28, 2008 Report Share Posted May 28, 2008 If you get the jets from Jeff, might as well get Metal Idle Screws, Taller Carb top adjusters, EZ pull slide springs. The soft springs are nice. :thumbsup: Quote Link to comment Share on other sites More sharing options...
Dinner Posted May 28, 2008 Author Report Share Posted May 28, 2008 Thanks Guys, really appreciate it :thumbsup: Jeff is giving me a call later this afternoon so I will get some assorted jets from him. Figure I'll get some 150-155 Mains, 48-50 Pilot...being as I already have 52's. And a couple CEL Needles. I'm kinda worried right now though, when I was out puttin' around jetting it, when my needle was giving me a hard time shee was cutting out pretty bad in 1-4 throttle, or when you snapped the throttle. Just worried that I might have hurt the new engine...but then again top ends are cheap. Plugs are very brown though since my pilot and main are rich, so maybe nothing is hurt :ohmy: Quote Link to comment Share on other sites More sharing options...
Dinner Posted May 28, 2008 Author Report Share Posted May 28, 2008 If you get the jets from Jeff, might as well get Metal Idle Screws, Taller Carb top adjusters, EZ pull slide springs. The soft springs are nice. :thumbsup: Is there much difference between the Metal Idle screws and the stock plastics ones? And what about Taller Carb Top Adjusters? What do they do? Quote Link to comment Share on other sites More sharing options...
jbooker82 Posted May 28, 2008 Report Share Posted May 28, 2008 Is there much difference between the Metal Idle screws and the stock plastics ones? And what about Taller Carb Top Adjusters? What do they do? I am sure the plastic ones work, I just like to have a metal screw. The taller carb adjusters allow you to take more slack out of the cable. Some times the carbs wont opean all the way. You might not need them on a pair of 33's. I put them on mine though. Do you have a Sync tool. Those work great for setting up the carbs. Quote Link to comment Share on other sites More sharing options...
dajogejr Posted May 28, 2008 Report Share Posted May 28, 2008 Plastic ones work fine, but think about this...every time you close the throttle, it's hitting that plastic. Over time, it'll wear, etc. Metal is a nice alternative. Would it be tops on my charts? no...is it a cheap, nice and easy benefit? Yep...sure is. Plus, if you remove the plastic all the way for cleaning, etc, the possibility with gorilla paws is there to strip them. Metal take a real dolt to strip with a lot of force... Quote Link to comment Share on other sites More sharing options...
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