2003LimitedBanshee Posted July 17, 2006 Report Share Posted July 17, 2006 Okay so it sounds like you've got a fuel problem. I still agree that anyone who wants to work on ANYTHING should have a compression tester, but you may have problems elsewhere for now. What you did by blowing in the "long line" was pressurize the float bowl, in theory forcing gas up into the carb where it could be drawn in with the intake air. Since it started but you had to hold the choke wide open, sounds to me like a fuel problem. Have you checked to see if the pilot jets are plugged? Do you know what I mean by pilot jets, maybe to start? But long story short sounds like fuel this time. Do you have a Clymer's Manual, if not it would be a very good $30 or so investment for you. Quote Link to comment Share on other sites More sharing options...
macho Posted July 17, 2006 Author Report Share Posted July 17, 2006 There is nothing wrong with the stock carbs, they work well..once you remove the TORS. I agree...bigger carbs are better for performance...but, I wouldn't be buying them to troubleshoot. Make sure you remove the Main, Pilot and needle and seat and clean them all very well... You can just tip the stockers upside down, and set the floats level... The bottom of the float (top side when upside down) is suppoed to be 21mm higher than the gasket surface...and keep in mind...the needle itself is spring loaded, make sure you're not pushing that spring in when setting the height or you'll get a false reading... sounds good.r u talking about the needle thats in that cylender when you remove the carb?u know the 1 that remains on the top that has the idle screw? Okay so it sounds like you've got a fuel problem. I still agree that anyone who wants to work on ANYTHING should have a compression tester, but you may have problems elsewhere for now. What you did by blowing in the "long line" was pressurize the float bowl, in theory forcing gas up into the carb where it could be drawn in with the intake air. Since it started but you had to hold the choke wide open, sounds to me like a fuel problem. Have you checked to see if the pilot jets are plugged? Do you know what I mean by pilot jets, maybe to start? But long story short sounds like fuel this time. Do you have a Clymer's Manual, if not it would be a very good $30 or so investment for you. not rally i think its that little thing thats on the float in the carb..but what do you mean by plugged? Quote Link to comment Share on other sites More sharing options...
dajogejr Posted July 17, 2006 Report Share Posted July 17, 2006 First off, get that clymers manual. Second, there are two jets in the bottom of the carb, once you get the float bowl off. The larger hex head is the main. Directly in front of where that sits is the Pilot Jet. You need a small, flat blade screwdriver to remove it. Take it out, and use a piece of speaker wire (one strand) or air to blow it out... The holes on this are very, very tiny and could easily get clogged by a spec of dirt, no kidding. Quote Link to comment Share on other sites More sharing options...
macho Posted July 19, 2006 Author Report Share Posted July 19, 2006 First off, get that clymers manual. Second, there are two jets in the bottom of the carb, once you get the float bowl off. The larger hex head is the main. Directly in front of where that sits is the Pilot Jet. You need a small, flat blade screwdriver to remove it. Take it out, and use a piece of speaker wire (one strand) or air to blow it out... The holes on this are very, very tiny and could easily get clogged by a spec of dirt, no kidding. yea you see i cleaned the carb with carb cleaner.the only thing i didnt do was take that screw out cause i had nothing small enough.but everything else was sprayed..so the main jet is the one that hangs on the float,and the pilot jet is the 1 you got to screw out right. Quote Link to comment Share on other sites More sharing options...
dajogejr Posted July 19, 2006 Report Share Posted July 19, 2006 Yep...you got it. You can pick up a micro-screw driver set fairly cheap...less than 10 bucks I'd say... Quote Link to comment Share on other sites More sharing options...
Animalman294 Posted July 19, 2006 Report Share Posted July 19, 2006 Ya, they also call them jewelers screw driver's and sometimes they are worth their weight in gold.............. :beer: Quote Link to comment Share on other sites More sharing options...
Tim573 Posted July 19, 2006 Report Share Posted July 19, 2006 I have a back firing problem also, and my spark plugs have oil on them. The yamaha dealer told me to check and see if my silencers need to be repacked. Does anyone have any advice. Quote Link to comment Share on other sites More sharing options...
dajogejr Posted July 19, 2006 Report Share Posted July 19, 2006 I have a back firing problem also, and my spark plugs have oil on them. The yamaha dealer told me to check and see if my silencers need to be repacked. Does anyone have any advice. First off, what are you running your premix ratio at? Second, time for a compression and a leakdown test. Compression to see if it needs a top end freshen up, leak down to see if there's an air leak/seal gone bad. Quote Link to comment Share on other sites More sharing options...
Tim573 Posted July 19, 2006 Report Share Posted July 19, 2006 I jus rebuilt the whole engine and I run 21ozs to 4al of 93 octane Quote Link to comment Share on other sites More sharing options...
dajogejr Posted July 19, 2006 Report Share Posted July 19, 2006 You're using too much. That's like 18 or 19:1. Try 32:1.... 16 ounces per 4 gallons. Repacking your silencers has little more to do with your problem other than it'll be a little quieter...unless they're clogged up as all could be, or there is no packing at all. And...you really should check the compression in both cylinders. I'd almost bet you're in or very near the ball park for needing more than 93 octane. Is your timing stock, or advanced as well? Actually...this is really hijacking Macho's thread (sorry... ). You might want to start your own thread...and post a link to this one if you'd like.... Quote Link to comment Share on other sites More sharing options...
liquedfire Posted July 20, 2006 Report Share Posted July 20, 2006 ok dude do a compression test!!!!!!! then when u do the test then come back on to this thred and tell us how much u have :baseball_bat: Quote Link to comment Share on other sites More sharing options...
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