Raptor carbs driving me nuts
#11
Raptor carbs driving me nuts
i honestly believe you have a fuel delivery problem. If the bike was to rich, you will immediately feel it at High RPM. If it runs well at high RPM for a while and then start bogging down, while you are at WOT, then its fuel delivery. The white electrode seems to confirm this.
The float levels might be to low, or you have a slight blockage in the fuel supply. Set the float level to 3mm at the mating surface of the carb and measure it with a clear tube to make sure. Then make sure the needle valves are clean. Blow into the fuel pipe leading to the carbs, while you have them on the bike and no fuel in them. Do not open the carbs, just open the drain screw and let the fuel out. You should not struggle to blow into the pipe.
Also make sure the petcock and tap is flowing fuel very easily. Another thing that might also mess you around is the breather pipe on the gas cap. Make sure that hole and pipe is not blocked. If it is blocked it might form a vacuum inside the tank and it will not flow fuel.
The float levels might be to low, or you have a slight blockage in the fuel supply. Set the float level to 3mm at the mating surface of the carb and measure it with a clear tube to make sure. Then make sure the needle valves are clean. Blow into the fuel pipe leading to the carbs, while you have them on the bike and no fuel in them. Do not open the carbs, just open the drain screw and let the fuel out. You should not struggle to blow into the pipe.
Also make sure the petcock and tap is flowing fuel very easily. Another thing that might also mess you around is the breather pipe on the gas cap. Make sure that hole and pipe is not blocked. If it is blocked it might form a vacuum inside the tank and it will not flow fuel.
#12
Raptor carbs driving me nuts
Freez is right on![img]i/expressions/face-icon-small-wink.gif[/img] I had this problem with my bike before. At WOT it would use gas faster than the float bowls could fill back up. I would get some needle valve and seats out of a Grizzly 660 and install those. This should fix your running out of fuel on the top end. Because thats what it sounds like to me.
#13
Raptor carbs driving me nuts
Originally posted by: Freez
i honestly believe you have a fuel delivery problem. If the bike was to rich, you will immediately feel it at High RPM. If it runs well at high RPM for a while and then start bogging down, while you are at WOT, then its fuel delivery. The white electrode seems to confirm this.
The float levels might be to low, or you have a slight blockage in the fuel supply. Set the float level to 3mm at the mating surface of the carb and measure it with a clear tube to make sure. Then make sure the needle valves are clean. Blow into the fuel pipe leading to the carbs, while you have them on the bike and no fuel in them. Do not open the carbs, just open the drain screw and let the fuel out. You should not struggle to blow into the pipe.
Also make sure the petcock and tap is flowing fuel very easily. Another thing that might also mess you around is the breather pipe on the gas cap. Make sure that hole and pipe is not blocked. If it is blocked it might form a vacuum inside the tank and it will not flow fuel.
i honestly believe you have a fuel delivery problem. If the bike was to rich, you will immediately feel it at High RPM. If it runs well at high RPM for a while and then start bogging down, while you are at WOT, then its fuel delivery. The white electrode seems to confirm this.
The float levels might be to low, or you have a slight blockage in the fuel supply. Set the float level to 3mm at the mating surface of the carb and measure it with a clear tube to make sure. Then make sure the needle valves are clean. Blow into the fuel pipe leading to the carbs, while you have them on the bike and no fuel in them. Do not open the carbs, just open the drain screw and let the fuel out. You should not struggle to blow into the pipe.
Also make sure the petcock and tap is flowing fuel very easily. Another thing that might also mess you around is the breather pipe on the gas cap. Make sure that hole and pipe is not blocked. If it is blocked it might form a vacuum inside the tank and it will not flow fuel.
Of course, post a response as soon as you get this fixed....[img]i/expressions/face-icon-small-wink.gif[/img]
#14
#15
Raptor carbs driving me nuts
You are only running a "slip on" with all of that gas and air being forced in. Did you put your stock filter and lid on and see if that stopped it? Style of riding can also cause it. I ride with a guy who has the same setup as I do and he put puts on his so much he loads up the carbas and finally blows them completely off the motor when he guns it.
have also installed the GYT-R Carbon Fiber Slip-on.
#16
Raptor carbs driving me nuts
I had the exact same problem when i was running the stock exhaust and the stock filter and lid with snorkel. I think it is running out of fuel on top end, I am going to try FREEZ's suggestions and see waht happens. With the stock parts it had the exact reaction, but with the new parts I am just going faster when it happens LOL.
Thread
Thread Starter
Forum
Replies
Last Post
Bucknekked
Polaris
1
06-30-2015 02:06 PM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)