04chase Posted November 24, 2009 Report Share Posted November 24, 2009 going to glamis this weekend and think my jetting may be a bit off i have a 4 mil cub , mildish port work done by hjr ( mild /aggressive) 39mm pwk carb's , v force 3's shearer in frame pipes . runs on gas. jets are currently 165's and im having a slight bog right before i hit the powerband . once its hits it pulls nice. i am currently at 750 feet above sea level i will be riding @ about 250-300 so it may lean out a bit . just wondering if its possibly my pilot jets . i know i have the stock pilots in there that came with the 39mm pwks. any one have any experience with this type of setup? Quote Link to comment Share on other sites More sharing options...
dajogejr Posted November 24, 2009 Report Share Posted November 24, 2009 Ask HJR what he recommends. CEL and DEK are popular needles for those motors over here. We've run 45 to 50 pilots in those carbs for gas. Quote Link to comment Share on other sites More sharing options...
00tbanshee Posted November 24, 2009 Report Share Posted November 24, 2009 ceg needle,170 main,50 pilot with the a/f screw 1/2 turn out.that main will be alittle rich but if you are going to hit olds hill any it will be safe Quote Link to comment Share on other sites More sharing options...
04chase Posted November 24, 2009 Author Report Share Posted November 24, 2009 ceg needle,170 main,50 pilot with the a/f screw 1/2 turn out.that main will be alittle rich but if you are going to hit olds hill any it will be safe how would i know what needle i have ? i know it hasnt been changed , kind of sucks we are leaving tomorrow and the only pplace i can think of that may have that is inland . Quote Link to comment Share on other sites More sharing options...
00tbanshee Posted November 24, 2009 Report Share Posted November 24, 2009 how would i know what needle i have ? i know it hasnt been changed , kind of sucks we are leaving tomorrow and the only pplace i can think of that may have that is inland . call kev,he will tell you what you need to have Quote Link to comment Share on other sites More sharing options...
sleeper06 Posted November 25, 2009 Report Share Posted November 25, 2009 Im at sea level same set-up,180 main 55 pilot,cel 4th clip.Jetted for 1/4 mile.Maybe its just me but that sounds lean Quote Link to comment Share on other sites More sharing options...
04chase Posted November 25, 2009 Author Report Share Posted November 25, 2009 i know 180 is to much . i know last time out i had a bit of popping up the hill with the 170's and i went up a size and it got worse so i think i was a bit fat so im using the 165's . im going to try 160's out there if its not good with what i have now but i think the mains should be ok just the pilots and needles need some attention. Quote Link to comment Share on other sites More sharing options...
sleeper06 Posted November 25, 2009 Report Share Posted November 25, 2009 I bought the whole set up off jeff at fast ,39 pwk +7 timing race gas unported cub he told me 2 start at 185s,55.After break in with full 1/4 mile chop I ended up at 180 but 1/4 is a long hall.You can run it a lil leaner on short distances,Every bike is diffrent I just know glamis is sea level or close and so am I Quote Link to comment Share on other sites More sharing options...
Hilarious Posted November 25, 2009 Report Share Posted November 25, 2009 going to glamis this weekend and think my jetting may be a bit off i have a 4 mil cub , mildish port work done by hjr ( mild /aggressive) 39mm pwk carb's , v force 3's shearer in frame pipes . runs on gas. jets are currently 165's and im having a slight bog right before i hit the powerband . once its hits it pulls nice. i am currently at 750 feet above sea level i will be riding @ about 250-300 so it may lean out a bit . just wondering if its possibly my pilot jets . i know i have the stock pilots in there that came with the 39mm pwks. any one have any experience with this type of setup? I think the pwks come with a 62 pilot. i would try a 50~52. i have almost same set up as you: drag port 4mm cub, 175 mains, CEL needle middle clip, 52 pilots and 2 turns out on air screws. you can tell what needles you have by pulling them out and there will be a (3) letter designation on the blunt end. Quote Link to comment Share on other sites More sharing options...
dajogejr Posted November 25, 2009 Report Share Posted November 25, 2009 Not every time, Mr. Germain. Some OEM needles have that weird NXXX number. Here's a chart to decipher: http://www.keihin-us.com/am/_media/pdf/pwk-pj_jetneedles.pdf Quote Link to comment Share on other sites More sharing options...
04chase Posted November 25, 2009 Author Report Share Posted November 25, 2009 thanks for the help guys im going to run it a bit rich while im there and get into it when i get back . see some of you in glamis. Quote Link to comment Share on other sites More sharing options...
Hilarious Posted December 1, 2009 Report Share Posted December 1, 2009 Not every time, Mr. Germain. Some OEM needles have that weird NXXX number. Here's a chart to decipher: http://www.keihin-us.com/am/_media/pdf/pwk-pj_jetneedles.pdf are we talking about OEM carbs here? i thought we were talking about PWK's. 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.