Mystery Tubes.

[SpeedingTurtle]

Hey guys I was going to go ahead and do a test start on my engine, but I see these tubes and I'm not sure if they are needed. No tutorial I have found speaks about them. Can you guys tell me what to do with them?

4 stroke engine.

 

[bairdco]

Breathalyzer tubes so you don't ride drunk.

 

[Tom from Rubicon]

I don't think the towel is going to keep your engine mount stable. I always took it to be a drain.
My Huasheng has one.
Tom from Rubicon

 

[Venice Motor Bikes]

One is a vent, the other is a drain tube.
You can either point the tubes downward, or remove them.

 

[SpeedingTurtle]

I

I don't think the towel is going to keep your engine mount stable. I always took it to be a drain.
My Huasheng has one.
Tom from Rubicon

I agree. I ordered a heavy duty mount and they sent this one by accident. It's only for the break in period. This cheap one looks like it will cut through my frame with enough vibration. I have some perma-lock juuuuuuuuust to be safe.

To everyone else! thanks for the info

 

[MotorBicycleRacing]

Remove the brass plug on your carb next to the engine.
Plug covers the air mix screw.
Center punch the plug and drill it out or drive a screw in to pull it out.

 

[SpeedingTurtle]

Remove the brass plug on your carb next to the engine.
Plug covers the air mix screw.
Center punch the plug and drill it out or drive a screw in to pull it out.

Can I ask why? For learning purposes .

 

[FOG]

Can I ask why? For learning purposes .

Of course you can.

Under the brass plug is mixture screw you can use to fine tune your low speed circuit. Also called a pilot circuit in some circles.

Too rich will result in what I call blubbering. Also known as four stroking. You'll know. Runs like crap at idle is another description.

Symptoms of too lean are surging during deceleration. When you come to stop if the idle stays high for awhile and then settles down it's too lean.

Tweak it a quarter turn and take a ride. You'll find the sweet spot.

 

[MotorBicycleRacing]

Can I ask why? For learning purposes .

Stupid plug is only there for bs EPA rules so you can't adjust the air mix.
If its running good don't mess with it right now.

When you do adjust it turn it in and count the turns until it lightly seats.
2 turns out is a good starting point.
There is a good tutorial here on adjusting it.

 

[SpeedingTurtle]

Of course you can.

Under the brass plug is mixture screw you can use to fine tune your low speed circuit. Also called a pilot circuit in some circles.

Too rich will result in what I call blubbering. Also known as four stroking. You'll know. Runs like crap at idle is another description.

Symptoms of too lean are surging during deceleration. When you come to stop if the idle stays high for awhile and then settles down it's too lean.

Tweak it a quarter turn and take a ride. You'll find the sweet spot.

Is this something I want to do later later?
After my break in?
Or during my break in?

I

 

[FOG]

Is this something I want to do later later?
After my break in?
Or during my break in?

I

Bad on me Turtle. I thought we were talking 2 strokes when I gave you that advice. 4 strokes aren't near as sensitive to mixture issues and you're probably fine right where the factory set it.

It's still OK to mess with it whenever ya want tho. Just remember where you started.