EXUP Worldwide

whats up gang pullin me hair out,my 94 yzf stutters at idle to 4thou.No exup stock needle jet with a dyno let kit with 136 mains stock air box.the bike runs great above 4 thou.it is a rich situatio cause the needles are on the lowest setting if i richen it one clip it runs worse.the main is right on. <p></p><i></i>

you're WAY richer that my 95...124 mains I think. might even be 120's<br>lowest needle and new emulsion tubes and K&N<br>try turning in the pilot air screw<br> <p></p><i></i>

low rpms=pilot screw and emulsion tubes (warped?)<br>mid=needle<br>high=main's <p><!--EZCODE FONT START--><span style="color:lime;font-size:medium;">Nbot</span><!--EZCODE FONT END--><br><!--EZCODE ITALIC START--><em>'94 Fizzer Litre</em><!--EZCODE ITALIC END--><br>Be alert ... the world needs more lerts ... :)</p><i></i>

dragracer I ran the bike last with the 136 mains ,do you have the exup?I have the air screws at 3/4 turn out to the point where it has a lean hesitation when I snap the throttle and it still stutters,a bit less but it still does.O and thanks for everyones help I thinks i will change those emulsion tubes and o b4 i forget the rubber o ring type gasket has been bad on three sets of carbs.The gasket that seals the jet holder to the carb body,they should be changed too.Again thanks <p></p><i>Edited by: <A HREF=http://p072.ezboard.com/bexupbrotherhoo ... RIDE455</A> at: 10/31/04 8:34 pm<br></i>

Yes, Exup is still there<br>I have a DJ stage 1 jet set in the bike that came with 120, 124 and 128 jets<br>The only jets that would work are the 120's and at that I have the needles in the leanest position<br>air screws are out 3 1/4 turns I think<br>No stutter<br>Bike would fowl plugs in a couple hundred miles with the bigger jets<br>wouldn't pull hard either<br>Your stutter problem is more than likely a result of large mains<br>J<br> <p></p><i></i>

The last time I ran the bike we had it on a dyno with the gas analyser,the large mains where the right size according to the analyser and it had a power increase.I do not have the exup in I have a full system...(have you ever held one of those things in your hand?)the exup that is ,its hevy.I will try the emulsion tube thing then I will lean the mains,the problem is below 4 thou I thinks the main is still sleepin at that point.I was thinkin that the taper on the needle should be leaner than it is, I think that the fatter side of the needle is lower rpm and should be wider to lean it at low rpm,..just a guess.Hopefully the emulsion tubes fix it. I will post my findings. THanks again. <p></p><i></i>