2010 GT5 (NEW) Flooding Badly

I suggest getting a nice, simple no-frills NT (Never Trouble) carburetor to use on your bicycle.
That way, you can get to riding and enjoying your MB while figuring out the CNS (Constantly Needs Service) carburetor at your leisure.

I found my major problem with the CNS carb to be the short intake - that made a big difference using one that was an inch or so longer. As well, I tightened the air inlet and the jet which both needed it. After playing with the needle settings and dialing it in it's running well. As well, I trimmed the choke cable and removed it's spring so it's always off, but I can pull it if I need to, just not on that shifter lever.

As far as starting goes, the CNS is probably not the problem. They start and idle just fine.

Have you checked to see if the plug is firing? If not check you wiring.

biknut said:

As far as starting goes, the CNS is probably not the problem. They start and idle just fine.

Have you checked to see if the plug is firing? If not check you wiring.

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The CNS I had today would not idle or start with any kind of predictability....nt went on and we were smilin' in moments....

Wm Holden said:

The CNS I had today would not idle or start with any kind of predictability....nt went on and we were smilin' in moments....

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That would be an uncommon complaint about the CNS carbs. Usually bikes that have them start, and idle just fine. The problem is that's all they'll do. When you give them throttle they just bog.

Hey I really dont have that many problems with the CNSv1 but the CNSv2 is another kettle of fish entirely. However I much prefer the Delardo knock off carbs over the NT or either of the CNSs...Be that as it may I think the OP asked for solutions and not opinions.

First off depending on the supplier good luck on getting any useful information let alone a response at all. I know it wasn't Piston Bikes because you could have called them or would have already heard back and all they are selling are 2011 kits.

Anyway here is my cents worth:

To the OP if you have fire to the plug and are reasonably sure that you have a flooding issue first make sure that your plug is dry before trying to start the engine and that you have the engine mounted to where the carb is as close to level as possible. If it is at too drastic of an angle the float in the bowl of the carb will not properly close and cause flooding . If it still fails to fire and the plug is saturated after trying to start it first check your choke and cable to ascertain it is fully open then remove the carb and take off the bowl and check the float to see if it has a hole in it and full fuel not allowing it to rise with the level of gas in the bowl. Also make sure that the float travels freely and is not stuck open (down position) and that the tip of the needle valve is clean and seating properly. When the carb is inverted (upside down) the the float level should be almost horizontal. If not then adjust this by bending the tang on the float.

As I said check your choke cable first it happened to me:





Good Luck
Mark