How do i check for leaks if i cant idle

Sitherus

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Apr 4, 2016
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252
Hi Im new as of this second to this site though i have been on browsing in the background learning as much as i can for some time now I have an engine that wont idle. It must have an air leak but i dont know where.
I know i need a spray bottle and run the engine to look for leaks but the only way i can get it to run is if its moving. How can i search for leaks without spraying it riding it and bending over under the bike in traffic?
I admit this is only my second time building it and last year i was so new to this i took it allover town trying to get someone to show me how to work the clutch. No one would even get near it.
My bike was missing its idle screw since last year so Im using a shortening screw on the throttle to adjust the idle while an m4 bolt is plugging the idle screw hole. I am also missing my muffler someone stole it 2 weeks into owning it. I admit i never got the chance to test idle before i didn't have a muffler other than that I have secured my Nt carb with an o ring and a better metal hose clamp I have cleaned the carb out inside and out its float has no leaks, the pin works and i dont know what a jet is but there is nothing un screwed inside it. I have adjusted the float clip thing but that hasnt changed anything. My carb is level with the ground and there is a good flow of fuel to it. I couldn't idle when i had an idle screw btw. Other than all of this the only other upgrade ive made is a r3 spark plug

I know this is allot to read, but, if you can get through it it only describes what most people will tell me to do that i've already done.

Thank you I will post pics soon as I can.
 
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Legwon

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Dec 14, 2015
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29
get it started, One hand on throttle, other on idle screw. adjust idle screw till it idles. then check for air leak.
 

crassius

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Jul 23, 2012
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that carb sounds like a disaster - fix it right and get rid of o-ring or buy a new one
 

Sitherus

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Apr 4, 2016
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252
that carb sounds like a disaster - fix it right and get rid of o-ring or buy a new one
why get rid of the o-ring? i see many posts telling people to buy an o-ring that sits between the carb and the intake. also the only thing wrong with my carb is its missing idle screw. I can't idle even when slightly pulling the trottle cable as long as im not moving it stops running. It wont run when its NOT moving. Once again how do i check for leaks to fix the idle problem if i cant idle?

Would someone skype me so that they can see my bike in real time? tell me what to do?
 

crassius

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Jul 23, 2012
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4,575
o-ring is usually for a performance carb that doesn't fit the intake well - on an NT style carb, that ring can go right into motor

the missing idle screw may interfere with normal air flow

if you lock the clutch lever, you can keep it running while spraying water around intake area to find leaks
 

Sitherus

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Apr 4, 2016
Messages
252
o-ring is usually for a performance carb that doesn't fit the intake well - on an NT style carb, that ring can go right into motor

the missing idle screw may interfere with normal air flow

if you lock the clutch lever, you can keep it running while spraying water around intake area to find leaks
I have a m4 screw in place of the idle screw but don't have the tools to round off the tip.
My clutch lever with the locking pin broke last year due to it being a cheap aluminum cast. It cracked in half. I have since replaced it with a long brake lever. i have to hold it down when pedaling.

How do i prop the back wheel off the ground? I tried using a car pneumatic jack but it just fell off of it. Also When i pull the clutch while the motor is on it makes a huge noise like the motor is revving in place and I'm afraid I'm stripping the flywheel and butterfly nut. So what your saying i do so that I'm absolutely sure, is, I ride the bike til its warmed up, then I take it to the place i work on it, and prop up the back tire, then kick start it, and hold in the clutch to keep it running, while spraying it with water to find bubbles? This wont break anything?
 

Nanonevol

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Oct 1, 2015
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166
One way to get the wheels off the ground is to hang the bike by ropes from garage or workshop rafters.
 

crassius

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Jul 23, 2012
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I use a big rubber band on bikes that come in for repairs with no clutch lock - band holds the lever in
 

Sitherus

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Apr 4, 2016
Messages
252
So i don't actually know how to idle. It is such a simple thing that no one ever explained it. all i know is i on video people stop their bike and it keeps running and mine does not. Also i listed the steps im taking.


"So what your saying i do so that I'm absolutely sure, is, I ride the bike til its warmed up, then I take it to the place i work on it, and prop up the back tire, then kick start it, Give it gas, and hold in the clutch to keep it running, while spraying it with water to find bubbles? This wont break anything?"

Is this the right procedure?

I did this today and pulling the clutch while it was running only made it stop running.
 
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