bajjer9 Posted June 21, 2005 Share Posted June 21, 2005 gonna take Maxx advice with my factory pro jet kit install and go up on the pilot jet but which on the ron ayers diagram is the pilot jet? I need to find a part number as a starting place. Anyone? http://www.ronayers.com/fiche/200_0351/car...580&parent=5570 Quote Link to comment Share on other sites More sharing options...
Pete in PA Posted June 22, 2005 Share Posted June 22, 2005 It's part #41 on the microfiche. it's a #42 pilot jet. I think if you go higher in number they get bigger and flow more fuel. Try a set of 44's Honda won't sell you anything else but that size for emission reasons. You'll have to go to Chapparal or someone who sells jets seperately. Can't remember if it's a set of Kehins or mikuinis. (haven't looked at mine for awhile) Quote Link to comment Share on other sites More sharing options...
Red J Posted June 22, 2005 Share Posted June 22, 2005 It's part #41 on the microfiche.it's a #42 pilot jet. I think if you go higher in number they get bigger and flow more fuel. Try a set of 44's Honda won't sell you anything else but that size for emission reasons. You'll have to go to Chapparal or someone who sells jets seperately. Can't remember if it's a set of Kehins or mikuinis. (haven't looked at mine for awhile) Honda sold me a set of 45s... From Ronayers.com: Part Number: 99103-MT2-0420 Description: JET, SLOW (#42) Price: $12.01 Source: HONDA Exchange the part number for 99103-MT2-0450 for 45s. BTW, 0440 didn't turn up as a good part, neither did 0430.. Carbs are Keihins. Quote Link to comment Share on other sites More sharing options...
Pete in PA Posted June 22, 2005 Share Posted June 22, 2005 I should have said on the microfiche there is only one listed for the XX. You can get a cross from other Honda models. Quote Link to comment Share on other sites More sharing options...
Red J Posted June 22, 2005 Share Posted June 22, 2005 Do you know for sure if you can get pilots from Keihin in single number increments? I feel that the 45s are too rich for my setup, I'm back to 42s. J. Quote Link to comment Share on other sites More sharing options...
bajjer9 Posted June 22, 2005 Author Share Posted June 22, 2005 Thanks guys!! Quote Link to comment Share on other sites More sharing options...
bajjer9 Posted June 22, 2005 Author Share Posted June 22, 2005 i did a search for 99103-MT2-0430 and 99103-MT2-0440 but got no results however the 42 and 45 did so I must assume that 45 is the next size up from 42? yup from keihin site: 32 35 38 40 42 45 48 50 52 http://www.keihin-us.com/list.htm Quote Link to comment Share on other sites More sharing options...
Iceman_40 Posted June 22, 2005 Share Posted June 22, 2005 From my understanding jet sizes don't usually go up by one. They usually go up in size 2-3 per step. The carbs have some level of adjustment besides so there is no need to have each size. Quote Link to comment Share on other sites More sharing options...
Eric_The_Jew Posted August 9, 2006 Share Posted August 9, 2006 Pardon my ignorance, but what's the difference between going up sizes on the pilot jet as opposed to turning the "pilot screws" to change the mixture? Quote Link to comment Share on other sites More sharing options...
beondwacko Posted August 9, 2006 Share Posted August 9, 2006 Pardon my ignorance, but what's the difference between going up sizes on the pilot jet as opposed to turning the "pilot screws" to change the mixture? The pilot screws will limit what the total that the jets can flow. With a larger jet, you have the ability for greater flow. The screws work more or less as limiters. Cool ? Quote Link to comment Share on other sites More sharing options...
Eric_The_Jew Posted August 9, 2006 Share Posted August 9, 2006 Pardon my ignorance, but what's the difference between going up sizes on the pilot jet as opposed to turning the "pilot screws" to change the mixture? The pilot screws will limit what the total that the jets can flow. With a larger jet, you have the ability for greater flow. The screws work more or less as limiters. Cool ? Gotcha.....but one more question. When you are turning the pilot screws, are you adjusting airflow (like an air bypass circuit) or are you adjusting fuel flow? Quote Link to comment Share on other sites More sharing options...
dunedain Posted August 9, 2006 Share Posted August 9, 2006 Also, most inline 4's have different jets for the inner carbs vs. the outer. does anyone know if that s the case on the XX as well? Quote Link to comment Share on other sites More sharing options...
EVLXX Posted August 13, 2006 Share Posted August 13, 2006 Pardon my ignorance, but what's the difference between going up sizes on the pilot jet as opposed to turning the "pilot screws" to change the mixture? The pilot screws will limit what the total that the jets can flow. With a larger jet, you have the ability for greater flow. The screws work more or less as limiters. Cool ? Gotcha.....but one more question. When you are turning the pilot screws, are you adjusting airflow (like an air bypass circuit) or are you adjusting fuel flow? A general rule of thumb is.... if the screw is located after the slide it's a fuel screw.... if it's before the slide it's probably an air screw. IF it's an Air screw, and you are inbetween 1 turn out and 2 1/2 turns out... the pilot jet is fine. Quote Link to comment Share on other sites More sharing options...
Pete in PA Posted November 10, 2006 Share Posted November 10, 2006 I pulled this up again because THAT was my question...How do the pilot jet and pilot screw work, seperately or together. On the XX the pilot screw adjusts fuel at idle, turned all the way in, no fuel. This last time I just pulled my carbs I looked closely and the pilot screw is it's own seperate circuit. It bleeds fuel for idle only. as soon as you crack the throttle plates, the pilot jet also comes into play and only then do they work together. I also went from the stock 42 to 45 (next available size) and just looking down the hole at a white background with both next to each other I can't see that the 45 is bigger. It must be a REAL tiny amount. Quote Link to comment Share on other sites More sharing options...
Eric_The_Jew Posted November 10, 2006 Share Posted November 10, 2006 I have read where the concensus is 3 turns out from fully seated on the pilot screws. My question is, has anyone counted the number of turns their pilot screws were when they were factory preset? Just curious how close they were to the recommended 3 turns out. Quote Link to comment Share on other sites More sharing options...
Pete in PA Posted November 10, 2006 Share Posted November 10, 2006 I have read where the concensus is 3 turns out from fully seated on the pilot screws. My question is, has anyone counted the number of turns their pilot screws were when they were factory preset? Just curious how close they were to the recommended 3 turns out. anywhere from only 3/4 to closed! This is how they pass the EPA polution tests. Funny thing is per the manual the final opening after the idle drop procedure (ignore this) is 3/4 open, but then in the high alltitude setting they have you close the pilots 3/4 a turn. That would close them all! How would it idle? 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.