max power Posted May 7, 2010 Report Share Posted May 7, 2010 Hey kids,I just disassembled and cleaned the carb on my brothers 2001 Suzuki 300 Kiing Quad. It is a thumper. His original complaint was that the thing ran fine when cold, but flooded and died when it warmed up.When I reinstalled the carb (sans airbox) it fired right up but idled real high and the exhaust pipe got very hot and glowed red in short order. It seems to be getting plenty of fuel. It also backfired when shut off.So my question is, WTF? Any ideas? Quote Link to comment Share on other sites More sharing options...
hue jass Posted May 7, 2010 Report Share Posted May 7, 2010 Sounds WAY rich. Is the needle adjustable or worn out? Quote Link to comment Share on other sites More sharing options...
max power Posted May 7, 2010 Author Report Share Posted May 7, 2010 Way rich shouldnt let the exhaust pipe glow red though. Quote Link to comment Share on other sites More sharing options...
hue jass Posted May 7, 2010 Report Share Posted May 7, 2010 I get that from cars. When they're running rich they burn up their cats. Unburned fuel gets into the exhaust and burns there. Just a guess. Quote Link to comment Share on other sites More sharing options...
max power Posted May 7, 2010 Author Report Share Posted May 7, 2010 Hmm, but unspent fuel would cool the pipe wouldnt it? I didnt mess with any adjustments. Quote Link to comment Share on other sites More sharing options...
max power Posted May 7, 2010 Author Report Share Posted May 7, 2010 Hmm, but unspent fuel would cool the pipe wouldnt it? I didnt mess with any adjustments. Quote Link to comment Share on other sites More sharing options...
max power Posted May 7, 2010 Author Report Share Posted May 7, 2010 Hmm, but unspent fuel would cool the pipe wouldnt it? I didnt mess with any adjustments. Quote Link to comment Share on other sites More sharing options...
hue jass Posted May 7, 2010 Report Share Posted May 7, 2010 Hmm, but unspent fuel would cool the pipe wouldnt it? I didnt mess with any adjustments.Not if the pipe is hot enough to burn it. Again, a total guess. Hopefully this will be close enough to the top tomorrow when more guys can see it. Quote Link to comment Share on other sites More sharing options...
max power Posted May 7, 2010 Author Report Share Posted May 7, 2010 I guess thats possible. The settings are all stock though. All I did was take it apart and clean everything and reassemble. No settings were touched. Quote Link to comment Share on other sites More sharing options...
hue jass Posted May 7, 2010 Report Share Posted May 7, 2010 Bump it tomorrow and see what you get. There's got to be a forum about those things - I doubt it's the first case. Quote Link to comment Share on other sites More sharing options...
max power Posted May 7, 2010 Author Report Share Posted May 7, 2010 Quote Link to comment Share on other sites More sharing options...
Samizzle Posted May 7, 2010 Report Share Posted May 7, 2010 I've heard that when exhausts glow red like that it's because the timing is off. When the Exhaust valves open up the fuel is still combusting. The idle should be an easy fix if you can find the Idle adjustment screw... Quote Link to comment Share on other sites More sharing options...
Ziggy Posted May 7, 2010 Report Share Posted May 7, 2010 I know on the VStars, the pipes will blue due to heat from running too lean. With The air box removed, the carb is able to pull much more air than with the airbox installed, and the mixture is leaning out. Lean mixture will cause your fast idle and your hot pipe. A quick check to see if you're lean is with the filter and housing off of the carb, take some tape and tape off about 3/4 of the carb throat, effectively "choking" the airflow the carb can pull. The reduced airflow should help richen your mixture, and let you see if you've worked out the warm flooding issue before you put the airbox back on. Quote Link to comment Share on other sites More sharing options...
Casper Posted May 7, 2010 Report Share Posted May 7, 2010 I guess thats possible. The settings are all stock though. All I did was take it apart and clean everything and reassemble. No settings were touched.Didn't his buddies mess with some adjustments though? Could be lean or really advanced timing. Probably lean. First thing I'd do is knock the idle down. His buddies probably adjusted it. Should have an idle adjustment knob. I can run over there tonight after work and help you figure it out, but I require beer. Quote Link to comment Share on other sites More sharing options...
max power Posted May 7, 2010 Author Report Share Posted May 7, 2010 I've heard that when exhausts glow red like that it's because the timing is off. When the Exhaust valves open up the fuel is still combusting. The idle should be an easy fix if you can find the Idle adjustment screw...I adjusted the idle all the way out and it still idled very high, like half throttle.I know on the VStars, the pipes will blue due to heat from running too lean. With The air box removed, the carb is able to pull much more air than with the airbox installed, and the mixture is leaning out. Lean mixture will cause your fast idle and your hot pipe. A quick check to see if you're lean is with the filter and housing off of the carb, take some tape and tape off about 3/4 of the carb throat, effectively "choking" the airflow the carb can pull. The reduced airflow should help richen your mixture, and let you see if you've worked out the warm flooding issue before you put the airbox back on.I did try covering it with my hand, didnt change the idle though.Didn't his buddies mess with some adjustments though? Could be lean or really advanced timing. Probably lean. First thing I'd do is knock the idle down. His buddies probably adjusted it. Should have an idle adjustment knob. I can run over there tonight after work and help you figure it out, but I require beer. You know I gots beer. Call me. I might be at Yotas right after work though. Quote Link to comment Share on other sites More sharing options...
blake1221 Posted May 7, 2010 Report Share Posted May 7, 2010 Is the choke on? Sounds like a fuel enrichment problem to me... did you clean the choke valve? If i remember right there is a rubber diaphragm in there that maybe torn Quote Link to comment Share on other sites More sharing options...
max power Posted May 7, 2010 Author Report Share Posted May 7, 2010 Is the choke on? Sounds like a fuel enrichment problem to me... did you clean the choke valve? If i remember right there is a rubber diaphragm in there that maybe tornNo choke, did not clean the choke valve (is that the thing that broke on the VTR?) and the diaphragm checks out ok. Might have to try it with the choke disconnected. Quote Link to comment Share on other sites More sharing options...
blake1221 Posted May 7, 2010 Report Share Posted May 7, 2010 ITs different on a quad carb, mine has a spring and diaphragm on the side of the carb. The hawk has valves that slide in and out. Ill call ya on my way to work Quote Link to comment Share on other sites More sharing options...
Ziggy Posted May 14, 2010 Report Share Posted May 14, 2010 You get this fingered out? Quote Link to comment Share on other sites More sharing options...
fungames43232 Posted May 15, 2010 Report Share Posted May 15, 2010 I've seen this on dirt bikes. Check your timing and make sure the flywheel is tight tight tight. Actually I caused this issue on my sons dirt bike because I knocked his PU coil out of place and didn't tighten the rotor enough. Quote Link to comment Share on other sites More sharing options...
max power Posted May 16, 2010 Author Report Share Posted May 16, 2010 You get this fingered out?I think so. Cleaned out the carb (it was filthy) and explained to my brother that you have to clean and oil the air filter element once in a while. It was bone dry. He has never heard the word maintenance. Seems to be running good now. Quote Link to comment Share on other sites More sharing options...
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