acfine Posted September 22, 2008 Report Share Posted September 22, 2008 I installed a NOSS head with 21cc domes and Boyesen dual stage pro series reeds this weekend. I'm running 300 main jets and 25 pilot, and the needle is in the stock position. I also have a K&N air filter as well as the K&N PowerLid. My question is after these mods, do I need to change the needle clip position? Around the mid-range area, it's sputtering a bit, and then kicks in, but it's kicking in intermittently, which somwhat leads me to believe it could be in the twist throttle/throttle cable assembly. The cable itself is in pretty poor shape. I've ordered a new cable and am switching back to a thumb throttle, but wanted to know ya'lls thoughts about the carb situation. Additional information, about 2 weeks ago I bit it hard, and really messed up my twist throttle, and it doesn't feel like it's operating properly, like for one, it doesn't feel like it's opening the carbs all of the way. When I took my breather off, should one of the sliders in the carb (the choke side carb) be a bit more open the the other at closed throttle position? And like a dumb-a**, I didn't look to see if they were opening all of the way while I was in there. :shoothead: I just wasn't sure if the sputtering could be a result of my mods and keeping the needle clip in the stock position, or a bum throttle cable not opening the sliders all of the way. Also, is there a break-in period for a new head and reeds? I have attached 2 pics, hopefully you can see where the cable is in bad shape. It's where it comes out of the splitter and goes to the two carbs. Any thoughts? Thanks in advance... Quote Link to comment Share on other sites More sharing options...
acfine Posted September 22, 2008 Author Report Share Posted September 22, 2008 bump... Advice needed... Where typically is the clip set to based on the mods listed? And is there a break-in period for new reeds and a new coolhead? Thanks, Anthony Quote Link to comment Share on other sites More sharing options...
notsed Posted September 22, 2008 Report Share Posted September 22, 2008 sounds like you need to sync your carbs Quote Link to comment Share on other sites More sharing options...
brugal Posted September 23, 2008 Report Share Posted September 23, 2008 I installed Boyesen dual stage pro series reeds this weekend.My question is after these mods,do I need to change the needle clip position? Move needle clip one position leaner. Quote Link to comment Share on other sites More sharing options...
brugal Posted September 23, 2008 Report Share Posted September 23, 2008 I also have a K&N air filter as well as the K&N PowerLid. 4-6 sizes larger on the main.Adjust the air screws. Quote Link to comment Share on other sites More sharing options...
acfine Posted September 23, 2008 Author Report Share Posted September 23, 2008 Move needle clip one position leaner. Thanks brugal, I'll give that a go this weekend... Quote Link to comment Share on other sites More sharing options...
acfine Posted September 23, 2008 Author Report Share Posted September 23, 2008 4-6 sizes larger on the main.Adjust the air screws. Just to make sure I understand this correctly, 340's to 360's on the mains? I've had a few guys tell me that they thought the 300's were a bit fat, but thst was also before the head and reeds install. What are your approximate thoughts on the air crew? 2.5 turns out, or is it more of a feel thing, making small adjustments then testing? Thanks again for the help, Anthony Quote Link to comment Share on other sites More sharing options...
brugal Posted September 23, 2008 Report Share Posted September 23, 2008 Just to make sure I understand this correctly, 340's to 360's on the mains? I've had a few guys tell me that they thought the 300's were a bit fat, No,I thought you pressed 3 by mistake instead of 2,,300's are a bit fat. Quote Link to comment Share on other sites More sharing options...
brugal Posted September 23, 2008 Report Share Posted September 23, 2008 but thst was also before the head install. The NOSS head isnt going to effect the jetting. Quote Link to comment Share on other sites More sharing options...
acfine Posted September 23, 2008 Author Report Share Posted September 23, 2008 No,I thought you pressed 3 by mistake instead of 2,,300's are a bit fat. Question, and a it's not a smart ass question, but an honest question. Why do FMF and K&N send such big jets with their systems? Like 340's and 350's. If 300's are fat, I can't imagine why they'd send even bigger ones. Quote Link to comment Share on other sites More sharing options...
brugal Posted September 23, 2008 Report Share Posted September 23, 2008 Question, and a it's not a smart ass question, but an honest question. Why do FMF and K&N send such big jets with their systems? Like 340's and 350's. If 300's are fat, I can't imagine why they'd send even bigger ones. Alot of things go into jetting(elevation and temperature) are acouple, and they may require you to run bigger mains. Not to mention mods and engine work.The reason they send them is because you may need to go that big at some point. Stock mains are 200 ,some dealers will install anywhere from 190-220. 300's are fat,but I dont know your elevation or temp,I thought you meant 200's not 300's Quote Link to comment Share on other sites More sharing options...
05.Banshee.SE Posted September 23, 2008 Report Share Posted September 23, 2008 Take off your TORS sir!!!!! Isn't jetting for lower elevations typically fatter? (Example: Sea Level vs. 2000') Quote Link to comment Share on other sites More sharing options...
jamebo Posted September 23, 2008 Report Share Posted September 23, 2008 There's not a break-in period on a new coolhead, to my knowledge. Just re-check your torque on the head nuts after running a bit. Quote Link to comment Share on other sites More sharing options...
pr0blumz Posted September 23, 2008 Report Share Posted September 23, 2008 Sync your carbs and step up to a 27.5 on the pilot jet. Quote Link to comment Share on other sites More sharing options...
Tim Potteiger Posted September 24, 2008 Report Share Posted September 24, 2008 (edited) I would recommend you get a K&N stage 3 jet kit with the sharper taper needles and run a 270 main with FMF fatties. You set the needle clip on the middle ring with this needle from the kit. If you are sticking with the stock needles you do need larger jets (290 i think, but i wouldn't swear by it since I went to aftermarket needles), but I wouldn't move the needle. I ran that setup for a long time. That was the best tune for my bike before changing the carbs, porting, etc. And no, there is not break in time for heads and reeds. Just make sure and recheck the head torque after getting it hot and letting it cool off. Edited September 24, 2008 by Tim Potteiger Quote Link to comment Share on other sites More sharing options...
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