mdhc500 Posted August 13, 2008 Report Share Posted August 13, 2008 Ok... I will throw this one out there... My motor is an 06, stock all the way with about 10 hours on it. I have FMF pipes/silencers, I'm properly jetted at 270 mains, stock pilots, needle on the 3rd, and airscrews 1.5 out. I just tore it down a few weeks back to do some maintenance (bushings, bearings, some painting etc...) While it was apart I installed a Cool head with 19cc domes... When I got it back together I had the "Electrica Gremlin" as in my CDI box took a dump. I got that swapped out and wen to take it for a ride. It started right up on the first or second kick and idled great. I let it warm up a minute or two and started on my way and I lost all power and hear a cylinder drop. I looked back at the pipes and saw it was the right that had dropped. I headed back to the garage and thought maybe I fouled a plug. I swapped plugs and it had been setting for about 5-10 minutes and boom same thing. In troubleshooting this I swapped the plug wires from the coil back and fourth, ans still the right was dead. I swapped coils for one that I knew to be good with new plug wires and caps and same thing. If it sits for a while it will fire right up on both cylinders and it will die withing 3-6 minutes... While riding it home the second time it did pop back in and out running a time or two... There is no nasty white or black smoke, no oil or coolant coming out of the pipes, I am not loosing coolant from the radiator or coolant reservoir. My pickup coil gap is .018 between both magnets, and all of my electrical connections seem good. The choke tube is secured between the carbs, and the carbs are in sync. i never have them both off at the same time so the slides are not backward or swapped. Any thoughts? Quote Link to comment Share on other sites More sharing options...
NitroTate Posted August 13, 2008 Report Share Posted August 13, 2008 check your reeds on that side. That same thing happened to me this past weekend and my reed cage (V2's) had sort of fallen appart and the reeds were loose and gapped and flopping around. This causes that cylinder to run odd and come on and off etc. Quote Link to comment Share on other sites More sharing options...
LiftdT4R Posted August 13, 2008 Report Share Posted August 13, 2008 You have to do a compression check and see what PSI your making in both cylinders. If the right side is really low, then you know there is a mechanical problem somwhere. If both cylinders are fine, then you more then likely have an electrical issue still. Whether it be a coil, or the wiring, or plugs, or stator, who know. But the compression check will narrow down to electrical or mechanical. If I had to venture a guess, assuming that your carbs are perfect. Id say your compression is probably low in the right cylinder. I would say that you might have a bad seal from the head install, but again this is completely a guess. Once you get the compression test results you can go from there. You can also check the reeds. If the right side reed broke, or is worn out, then that would also cause this to happen. Quote Link to comment Share on other sites More sharing options...
LiftdT4R Posted August 13, 2008 Report Share Posted August 13, 2008 Are you the dude running the +4 timing key? If so, that might be your problem. :yelrotflmao: Quote Link to comment Share on other sites More sharing options...
shanYE west Posted August 13, 2008 Report Share Posted August 13, 2008 Are you the dude running the +4 timing key? If so, that might be your problem. :yelrotflmao: no.. he threw it in a lake.. I got a few ideas.... but i'm not cool yet.. I'm still workin on it.. Quote Link to comment Share on other sites More sharing options...
mdhc500 Posted August 13, 2008 Author Report Share Posted August 13, 2008 no.. he threw it in a lake.. I got a few ideas.... but i'm not cool yet.. I'm still workin on it.. You are the one that does not like me for some reason... lol And no, I'm not running the +4 key... I did a compression check before I fired it up after the cool head install 151 psi and the left and 150 on the right... I have not put the gauge on it yet... The weird thig is if it sets for a while, not necessarily until cool, it starts, runs, and revs, even pulls on both cylinders... Its like the right carb in running out of fuel after a few minutes?? I will double check my vent tubes and the vent on the gas cap as well... Again any thoughts are welcome... You can even call me a dumbass... You wont be telling me anything new on that one, so stick to the mechanical advice! LOL :cool: Quote Link to comment Share on other sites More sharing options...
NitroTate Posted August 13, 2008 Report Share Posted August 13, 2008 Like we said, check those reeds and one other thing that happened to me a few weeks ago that caused the exact same type of issue was that my ground wire had come detached at the wiring harness coming from the stator where it connects to the main harness so check that too or any ground point for that matter... Quote Link to comment Share on other sites More sharing options...
hercalmighty Posted August 13, 2008 Report Share Posted August 13, 2008 Check the float on the right. Make sure its opening and closing. Check the float hight also. Did you check the fuel line? Quote Link to comment Share on other sites More sharing options...
mdhc500 Posted August 13, 2008 Author Report Share Posted August 13, 2008 Check the float on the right. Make sure its opening and closing. Check the float hight also. Did you check the fuel line? I will be checking the reed(s), all lines, and plan on checking for air leaks again with starter fluid, and giving the carbs a good cleaning. I verified I have/had good ground and electrical connections when I was troublshooting my CDI box failure. Dumb question maybe, but how do I check the float levels in the carb? I have never gotten to crazy taking them apart... Quote Link to comment Share on other sites More sharing options...
NitroTate Posted August 13, 2008 Report Share Posted August 13, 2008 I will be checking the reed(s), all lines, and plan on checking for air leaks again with starter fluid,and giving the carbs a good cleaning. I verified I have/had good ground and electrical connections when I was troublshooting my CDI box failure. Dumb question maybe, but how do I check the float levels in the carb? I have never gotten to crazy taking them apart... It's actually pretty easy, difficult to explain in written words but get yourself some type of measuring device that can measure in millimeters. Once you have the carb off and the bowl off, turn the carb upside down so the floats are visible, gently lift the floats to ensure the needle isn't sticking. Now measure the distance from the base of the carb (where the gasket sits) to the top of the float when it's resting in place, you should be within 20-21 millimeters (I believe, you'll need to check the manual to be sure). If it's outside of that then you'll need to gently bend that metal tab that the float needle hangs from in order to get it within those measurements. Quote Link to comment Share on other sites More sharing options...
mdhc500 Posted August 13, 2008 Author Report Share Posted August 13, 2008 It's actually pretty easy, difficult to explain in written words but get yourself some type of measuring device that can measure in millimeters. Once you have the carb off and the bowl off, turn the carb upside down so the floats are visible, gently lift the floats to ensure the needle isn't sticking. Now measure the distance from the base of the carb (where the gasket sits) to the top of the float when it's resting in place, you should be within 20-21 millimeters (I believe, you'll need to check the manual to be sure). If it's outside of that then you'll need to gently bend that metal tab that the float needle hangs from in order to get it within those measurements. I will give all this shit a try... In the meantime if anyone else has anything to share feel free... I'll update tomorrow AM... Quote Link to comment Share on other sites More sharing options...
LiftdT4R Posted August 13, 2008 Report Share Posted August 13, 2008 The compression check will tell you what you need to know, that's the first thing I would do. Quote Link to comment Share on other sites More sharing options...
hercalmighty Posted August 13, 2008 Report Share Posted August 13, 2008 what you do is take the carb off and turn it over on a flat table. Take the bowl and gasket off. From the flat surface of the carb where the bowl sits you want to measure to the highest part of the float. It should be 20mm to 22mm. I used a set of calibers to do mine but you can cut a little gauge out of cardboard to do it. Check the jetting thread from Benbb it has it in there Quote Link to comment Share on other sites More sharing options...
dajogejr Posted August 13, 2008 Report Share Posted August 13, 2008 You missed a wire, etc. You have a bad ground... When you say bushings and seals....which bushings and seals did you replace? Motor...or suspension? Is your TORS still on? I'd unplug all that crap before you go any further, and buy the removal kit when you can. Quote Link to comment Share on other sites More sharing options...
mdhc500 Posted August 14, 2008 Author Report Share Posted August 14, 2008 You missed a wire, etc.You have a bad ground... When you say bushings and seals....which bushings and seals did you replace? Motor...or suspension? Is your TORS still on? I'd unplug all that crap before you go any further, and buy the removal kit when you can. The TORS are off... I did the suspension bushings, steering, etc... Nothing on the motor... I'm pretty confident that is not a ground issue. I went through my harness thru and thru when I was troubleshooting that bad CDI and I had good ground throughout... On this note, I took off both carbs and cleaned the living piss out of them with carb cleaner, used safety wire to make sure none of the jets were clogged, and removed that in-line fuel filter. It fired right up and is running on both cylinders. I ran it up and down the road a few times, and even WOT 1, 2, and 3rd... It didnt drop this time and it pulled real nice..., but I had to get to work, so I did not run it for more than a few minutes... It seemed to smoke a bit more than normal, like it was a bit rich? I did go up a jet size when I put on the cool head and bumped my compression up 30 psi per cylinder...? Anyway, I think it would have acted up like it was in this amount of time, but until I can take it for a spin tomorrow I wont know for sure. I did notice that the fuel line looked a bit pinched when I had the in-line filter in it? Thats why I removed it... Maybe it was slowly starving the right carb of fuel some how??? Shit I dont know... Hopefully it was just gummed up... It has been sitting for 6+ weeks... Oh, and the reeds look to be intact!!! I will do a compression test and post, but it was 150 + or - 2 psi per side after I did the head installation. But I will do it again! Quote Link to comment Share on other sites More sharing options...
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