FOUR problems on my new chinese 2-stroke

[djembefora]

hey, just mounted everything and hooked up all the cables and tubes and guts. i can get the thing to start but i have four discrete problems i have found... help with any of them would be much appreciated.


:-/:-/


1- there are two "throttle-looking" things with cables attached to them, protruding from my carberttor. all the diagrams i have seen only have a grip-twist shifter, but i also have something attached that looks like a down-tube style bike derailleur shifter. both have cables (similar to bike brake cables) which they control the tension of. both are attached into the carbertor where they are spring loaded. only the grip-twister seems to control the throttle; it also has the kill switch on it. what is the other one for?

2- there is a LOT of resistance on the back wheel even when i have the clutch engaged. like, the only way to move the bike forward is drag the back tire or carry it.

3- it dies any time i try to put it on a moderate uphill grade.

4- the yellow kill switch (which is on the twist-grip from problem #1) does not do anything. i have tried a lot of different "wiring guides" to no avail. how do i attach a kill switch wire to the frame? from my engine i have a black, blue and white wire; from the cdi black and blue, from the twist-grip green and red/yellow.

thanks!!!

 

[DuctTapedGoat]

1. One is your choke - they did that on the CNS carbs.


2. You need to adjust your clutch.

4 Step Clutch Adjustment.

1. Adjust the clutch's camshaft so that it is perfectly flat against the bucking bar.
2. Put the clutch handle into the locked position.
3. Adjust the flower nut CCW in very slow increments, checking to see when your bike rolls freely. Put the locking screw back in to lock the flower nut.
4. Fire up the bike, lock the clutch and lift the back wheel off the ground. If the wheel moves, adjust the flower nut again.


3. You can try adjusting your needle clip to lean it out. That or your choke is in. I personally would chalk it up to a CNSv2 carb.


4. Best wiring is this.

Don't attach anything to the frame!

Blue to blue to red/yellow
Black to black to green
Cap off the white.

 

[djembefora]

@ducttapedgoat: thanks! but what is a choke for and how do i use it?

 

[djembefora]

oh, also, it wont idle. when i come to a stop, it dies.

 

[Al.Fisherman]

@ducttapedgoat: thanks! but what is a choke for and how do i use it?

A choke is a restriction to the intake. It cuts air for a easier start in some bikes. If needed, once it warms up pull the lever down (off).

 

[hammer5312]

A choke is a design feature that makes the air/fuel mixture richer which causes the engine to increase in temperature, which once the engine is up to it normal operating temperature should run smoothly.
Fuel injected cars & motorcycles do this electronically....in the old days before electronic fuel injection, we would set the choke and fire up the motorcycle and as the engine warmed up the rev would increase as I was putting on the helmet and we'd have to stop and mess with the choke to keep it from over revving and then it would prolly die....

 

[DuctTapedGoat]

The not idling could very well be your clutch. Fire it up, jump off the bike, hold the back wheel off the ground and hold in the clutch. If while you're holding in the clutch the back wheel moves, the clutch isn't disengaging completely.

 

[motorpsycho]

you need to adjust your idle screw to raise the idle up. screw it in to raise the idle, screw it out to lower the idle.
the cns carbs are a pain for a newbie because they have an air-fuel adjustment screw as well as an idle screw(the idle screw should be the bigger screw on the left side of the carb.)

as everyone else is saying, your clutch probably needs to be adjusted which is easy to do.
with the clutch handle squeezed in, the rear wheel should roll freely (but there will be a little resistance because of the engine chain).

if your kill switch doesn't work, you probably have it wired wrong....a simple fix.
just follow the instructions above for the clutch adjustment and the wiring.

 

[Wolverine]

i just looked at the exploded views of this after having the same problem of my clutch not disengaging. i took off the side with the bucking bar and i swear i can not find the small little round ball that goes in before the bar. could this be a oversight or can it actually be missing? if so how do i get one or get this fixed?

 

[BoltsMissing]

OUCH!

i just looked at the exploded views of this after having the same problem of my clutch not disengaging. i took off the side with the bucking bar and i swear i can not find the small little round ball that goes in before the bar. could this be a oversight or can it actually be missing? if so how do i get one or get this fixed?

Don't even attempt to use the bike until that part is sorted.
What I do is throw away the china toy bearing and replace it with a real ball bearing, at least.
To go a step further, a bit pendantic, but I use 2 quality bearings and shorten the bucking bar.
To shorten the bucking bar, keep grinding one end bit by bit at a time and fit back on to test till the cover sits flush.
Don't shorten to much or it defeats the purpose. Zero tolerance works ok, it will wear in.
File both ends till smooth then fine wet/dry "polish".

To take it a step further, case harden both ends of the bucking bar using the heat-to-rosy-red-dip-in-fossil oil trick, and case harden the cam where it presses on the bucking bar to.