yakidou Posted December 17, 2011 Report Share Posted December 17, 2011 Need some help form the pro out there!!! I got a 2001 banshee with fmf fattys and powercore 2 silencers. I got a stock airbox with a prodesign foam filter and air snorkel removed. Stock mikuni carbs, stock reeds and stock everything else except my motor which is 0.80 over or 68mm piston size something like that. Summer jetting (70F-90F) was 280 mains with 25 pilot jet. Winter jetting (5F to 15F) is 310-320 mains with 30 pilot jet. The banshee won't kick start at all, unless i am towed by another atv so i can start it while i am on the 6 gear using the compression. Once the banshee is running using the push start method it runs fine and perfect. The plugs are medium brown. My problem is when i leave the banshee alone and it gets cold again and try to kick start it again it won't even come close to starting. Why i do not know, maybe my pilot jet needs to be to 32.5 or 35 can someone help me... I got fire on my plugs and everything is fine. My float are set to 21 mm and i have done a lot of reading and searching on here and google but i cant find any useful info to help me on what next thing i could do or check. So i need advice from the pro out here or someone who has had the same problem. Your help is very much appreciated i got a winter trip on the 26 of december and would like to be able to go with my baby!!! Any help is really appreciated. Quote Link to comment Share on other sites More sharing options...
lowbuckracing Posted December 18, 2011 Report Share Posted December 18, 2011 I'm no pro,but I would do a compression test... Quote Link to comment Share on other sites More sharing options...
Jereme6655 Posted December 18, 2011 Report Share Posted December 18, 2011 Compression test, check for choke tube between the carbs, do a leak down test. You may also be off with your pilots...... FMF pipes like 27.5 pilots..........don't know of many that change the pilot even in the winter. You may jsut be running so fat on start up that its just not willing to fire easily. Quote Link to comment Share on other sites More sharing options...
yakidou Posted December 18, 2011 Author Report Share Posted December 18, 2011 Compression is good on both cylinder 123psi. My pilot jet is good too because i tried with a 27.5 pilot jet before and when i would rev out the motor and let the gas off it would not come back immediately to idle but would rev a little higher than normal for a couple of seconds and then would come back to a normal idle which means that i was lean on my pilot. With the 30 pilot jet installed right now i have a quick response on the throtle anb from WOT back to idle. I installed new plugs too and it still won't start. I got it yesterday to show some sign of life but it did not start even if i heard a tiny burp from the motor. My guest right now is that i do not have enough fuel going in the motor or too much. My plug are not wet at all even if i kick start 30 times which kind of tell me there is not enough fuel. My air mixture is at 1 1/2 turn right now. When the bike runs she runs fine so i guest my air mixture is set right. I have notice yesterday that the bike when i pull the choke will not bog and would run quite good too but with a little throttle hesitation but would rev at WOT with no problem at all. I will remove my carb today and put a bigger main jet on it because of that to see if there is any difference on startup. I found out too that my gas tank is dripping tiny amounts of fuel by the petcock. Unfortunately all stores are closed today and i will need to order the o rings from my yamaha dealer which will take some time before i can test her again : ( Thanks for the help guys. If you have any other ideas feel free to share. P.S My magneto is on spec too by the way. I'll wait before i do a leak down test because it take more time and i need to remove the motor right? I'll look into that thanks ! Quote Link to comment Share on other sites More sharing options...
BigRed350x Posted December 18, 2011 Report Share Posted December 18, 2011 Try this... take a squirt bottle and spray a little bit of gasoline on your air filter. Hold the carbs wide-open and kick it over. If it fires up, you're probably not getting enough gas & I'd check your choke circuit. Maybe disassemble the carbs and give them a good cleaning. Are you running the stock head? Maybe a cool head with some aftermarket domes with a better squish angle could build a little more heat in the dome during compression and help it start when cold. Check all the normal stuff, choke tube, clean carbs, maybe try the next size up pilot jet and see how it likes it.... - Jared Quote Link to comment Share on other sites More sharing options...
J.J. Posted December 20, 2011 Report Share Posted December 20, 2011 is it possible that you miss-matched the float bowls? The carb float bowls are not the same, the carb with the choke has a jet that feeds the choke circuit on the other carb. Quote Link to comment Share on other sites More sharing options...
yakidou Posted December 20, 2011 Author Report Share Posted December 20, 2011 Thanks for all the answers and here is an update. Yesterday i inspected my carbs and found out that there was a chunk of ice in the float bowls to my surprise. I was told by the yamaha dealership in town that it was because of the condensation and that mikuni stock carbs where know for that during winter. Basicaly when my motor is warm and i close it and leave it outside my house at -5 farenheit it build up condensation in the carbs which is tiny amount of water that freeze in my carbs and can block my fuel entry or make it harder to start. I also notice that i had a tiny gas leak from the seal and o'rings contained in the valve from the gas tank. I replaced the seals and clean up my tank which had debris in it to my surprise again because i really take care of my banshee. I bought the shee last august so i think it was the past owner who clearly didn't show any respect as to maintenance and taking care of the shee. I jump 1 size on the main to put it to 320 main jet because it was too lean on 310. In response to J.J: My float are installed correctly because there is a number written on them and on the carbs if i remember well and i match them up last time i remove them. My pilot and main jet are brand new too and were not obstructed. My choke tube are installed correctly but i didn't inspect them. I'll check them more carefuly before i put them back on tonight. I'll do as bigred350 told me and will try to spray a bitof starter fluid or gas in the air filter to see if it helps to get it started. Good idea to see if it lacks fuel. I didn't have enough time yesterday to put the carbs back on and test fire it again. I'll probably have some time tonight or tommorrow after work and will keep you up to date. And finaly does anyone have any idea of what kinf of additives i can put im my gas tank that will help to reduce the condensation effect of water in my carbs because it is cold outside after i have ridden? I do not have any place to store the shee inside it has to stay outside at -5 to -15 F. Thanks everyone for the help and i will keep you updated. I hope and pray i will be able to start it tonight or tommorrow. I want to snow drift so bad!!! Quote Link to comment Share on other sites More sharing options...
badassbanshee479 Posted December 21, 2011 Report Share Posted December 21, 2011 which way do you have the slides in the carbs? look in the carbs from the back and let me know if the bottom of the slide is flat or if there is a notch cut out of it.... also what needles are u running and where is the clip? Quote Link to comment Share on other sites More sharing options...
yakidou Posted December 21, 2011 Author Report Share Posted December 21, 2011 Thanks for all the reply. Yesterday i put the carbs back on and to specify for badassbanshee from the back of the bike my slides are flat, i use the stock needles and it is at the 3rd clip position. I inspected the fire on the spark plugs everything is okay. I check my plugs after kick starting a couple of times and they are wet which tell me that that fuel goes in the motor but maybe a bit too much i dunno how to tell. I run 32:1 klotz original techiniplate with high octane pump gas which is 93 if my memory is correct and put fresh gas in it. I removed the hose form the carbs to make sure the fuel pass properly and everything was good. My choke tube and everything is installed correctly. I even put brand new br9es plug in it. I tried to start it once again and nothing happens it is not even close to kick starting. I even put some quick starting fluid (desperation mode) in the plug hole and my motor would rev (burn the quick starting fluid) and after that nothing else burn and the motor stops but fuel seems to get in the motor chamber. Could it be my gas mixture or air/fuel ratio that is fuck up??? My air screw is set at 1 1/2 turn. The problem is when my shee is started it runs fine so how can it be a air/fuel ratio problem? Tonight i will start it while being pull by another atv and i am pretty sure it will start and run real good. Last time i did that using 310 main jet and 30 pilot it ran great through all gears and when the motor was warmed up i closed it waited 5 minutes and then it started with only one kick start attempt. When the motor is warmed up there is no problem at all with the bike. But because my bike sit a 5 to -5F outside i think the temperature affect it somehow. Anyway i'll start it tonight using the push start method and will give you out more info tommorow on how she runs. It has been rejeted to 320 main jet and 30 pilot because the temperature drop to -5F. Thanks. Quote Link to comment Share on other sites More sharing options...
BLK'N'YELLOW Posted December 22, 2011 Report Share Posted December 22, 2011 (edited) Thanks for all the reply. Yesterday i put the carbs back on and to specify for badassbanshee from the back of the bike my slides are flat, i use the stock needles and it is at the 3rd clip position. I inspected the fire on the spark plugs everything is okay. I check my plugs after kick starting a couple of times and they are wet which tell me that that fuel goes in the motor but maybe a bit too much i dunno how to tell. I run 32:1 klotz original techiniplate with high octane pump gas which is 93 if my memory is correct and put fresh gas in it. I removed the hose form the carbs to make sure the fuel pass properly and everything was good. My choke tube and everything is installed correctly. I even put brand new br9es plug in it. I tried to start it once again and nothing happens it is not even close to kick starting. I even put some quick starting fluid (desperation mode) in the plug hole and my motor would rev (burn the quick starting fluid) and after that nothing else burn and the motor stops but fuel seems to get in the motor chamber. Could it be my gas mixture or air/fuel ratio that is fuck up??? My air screw is set at 1 1/2 turn. The problem is when my shee is started it runs fine so how can it be a air/fuel ratio problem? Tonight i will start it while being pull by another atv and i am pretty sure it will start and run real good. Last time i did that using 310 main jet and 30 pilot it ran great through all gears and when the motor was warmed up i closed it waited 5 minutes and then it started with only one kick start attempt. When the motor is warmed up there is no problem at all with the bike. But because my bike sit a 5 to -5F outside i think the temperature affect it somehow. Anyway i'll start it tonight using the push start method and will give you out more info tommorow on how she runs. It has been rejeted to 320 main jet and 30 pilot because the temperature drop to -5F. Thanks. spray a lil starting fluid in carbs then kick start it see if u can get it running like that, take air filter off spray in carb, but just a lil squirt Edited December 22, 2011 by BLK'N'YELLOW Quote Link to comment Share on other sites More sharing options...
J.J. Posted December 22, 2011 Report Share Posted December 22, 2011 In response to J.J: My float are installed correctly because there is a number written on them and on the carbs if i remember well and i match them up last time i remove them. My pilot and main jet are brand new too and were not obstructed. You wrote 'float' did you mean 'float bowl' ? floats are the same, bowls are not Look at this thread to see what I mean. Click me I even put some quick starting fluid (desperation mode) in the plug hole and my motor would rev Take it easy with that stuff, you're gonna break something happy holidays and good luck Quote Link to comment Share on other sites More sharing options...
yakidou Posted December 22, 2011 Author Report Share Posted December 22, 2011 Thanks J.J and all the other for your response. I meant float bowls in my previous post. My float bowls are associated with the right carbs. Yesterday i put an heater next to the shee and waited 15 minutes and tried to start it with no success at all. I was really mad and frustrated and decided to go calm myself inside and to try after diner. Working for an hour outside at 0 F is quite unpleasant. After diner i went back to the shee with a brand new attitude and i put my hands toward the sky and scream out loud: "GOD i put her in between your hands now because i do not know what to do anymore". It felt so good. I jumped on the quad to start her and at my surprise she started will only 3 kick. To this day i still do not know how i got her started and if God has anything to do with that lol I am just happy now that she started and i can ride her again. Thanks to all of you for your help. Much love to ya all and i wish you a merry christmas and that your banshee's work flawlessly. Quote Link to comment Share on other sites More sharing options...
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