2011 CNS V2 Carb Bogging

[mxchris727]

So I've received the new NT carb in the mail but I need to change the length of the end of the throttle cable. Does anyone know what the length of the cable is from the metal stopper to the very tip of the cable when the other end is fully retracted?
If you don't understand, I've posted a picture

Thanks,
Chris

 

[Off the hook performance]

Going thou the samething took boost bottle off,
Was ridin 32mph now 25..jets where can I get them?

 

[Off the hook performance]

Boggin problems im going try this plug
Ngk-BR6hix
Both my motors 49 & 80..

 

[biknut]

I just slapped a NGK BP6HS in a new SkyHawk 80 with a v2 carb and the motor loved it. The stock plug was crap in a back to back comparison.

 

[mxchris727]

So I tried re-jetting the carb down each step to a #67 jet but that did not improve anything...
What did fix eveything was the new NT speed carb that I bought from Boygofast for $15.
The motor is running perfectly and there is almost double the power than before!!!

I say that the best way to fix/tune a CNS carb is not use it

 

[biknut]

So I tried re-jetting the carb down each step to a #67 jet but that did not improve anything...
What did fix eveything was the new NT speed carb that I bought from Boygofast for $15.
The motor is running perfectly and there is almost double the power than before!!!

I say that the best way to fix/tune a CNS carb is not use it

You didn't go far enough before you gave up you should have kept going to a #66, or #65. I'm trying a #64 now, and it's pretty good compared to a #67

The needle needs to be in the richest position too. Also blow off the Chinese sprak plug and use a NGK BP6HS

I am glad to know that you can just slap a NT on and it runs good. I've already spent more in drill bits than a new carb costs.

 

[driftology]

I'm hating this carb. if I run it in a lean needle position the engine runs great. but I don't want to cook the motor. if I run just one clip richer then the bogging come back. I don't know what to do. I have a super rat by the way.

 

[Greg58]

Have you done a plug check? You may o/k or not as lean as you think. Go to the classic threads and you can find pics. of what your plug should look like.

 

[driftology]

Yea I have. the plug comes out snow white when it runs great.

 

[biknut]

Yea I have. the plug comes out snow white when it runs great.

Are you running the stock main jet?

 

[driftology]

Yea its all stock.

 

[biknut]

Yea its all stock.

Then I can understand why your plug is so white.

The stock jet is equal to about a #71 drill bit. I'm working on a stock SkyHawk 80 and had to drill the jet out to a #64. It wouldn't take hardly any throttle from stock till I got it out to about a #67.

 

[driftology]

Oh man I wish I knew what you were talking about lol.

 

[biknut]

Oh man I wish I knew what you were talking about lol.

It's not that complicated. Basically you're running too lean (not enough gas). It seems like all the motors that come with the CNS carb are jetted too lean from the factory.

With machinist drill bits, the smaller the number on the drill bit, the bigger the bit. With these drill bits you can enlarge the jet to make it run richer.

 

[driftology]

How is this different than moving the clip

 

[biknut]

How is this different than moving the clip

The clip just adjusts the needle. That only affects the bottom end and mid range. The main jet feeds the needle jet, and affects the mid range, and top end.

 

[driftology]

Is there a way to run rich in the bottom and middle and run lean at wot? as I am set right now. I bog at the top end of things because of too much fuel. but the plug looks great.

 

[Greg58]

If your engine is bogging at wot what air cleaner are you running? If the air cleaner can not flow enough air volume it will draw more fuel thus the bogg, you may want to try a SBP k/n style air filter. With this filter properly oiled you will have a cleaner air flow. These engines rur best at 14 to 15 to 1 air to fuel ratio so good air flow is important.

 

[driftology]

I have the same issue with no filter

 

[Greg58]

these engines do not run good without a filter.