Hi all. Just got my brand new Karizma-R , but was having a issue. The bike won't idle and would stop if i don't constantly pull a bit of throttle. I tried adjusting the AFR screw setting by following the picture provided by psr sir at post no. #12774 but ended up opening the drainage screw instead and lose a bit of oil . I am very new to all this, so please guide me in the right direction to fix the issue.

Does a new bike require AFR tuning? I feel factory settings should do good.
It may be a case of cold start. Try starting with the choke pulled in. Then see if it settles down.

Yes, indeed I cannot start the bike unless I pull in the choke. But while driving today, the bike stopped abruptly several times while stopping in traffic if I don't pull in the throttle at all. So thought may be the engine is not getting enough oil. Don't know, but is there a reason the bike was not idling unless I pull a bit of throttle.

Sorry for dragging the issue but I'm unable to come to terms that it can be AFR related issue. If the issue happened only today and was proper before, how could the bike get its AFR altered in the meantime?
Anyways, did you have enough fuel in the bike? May be a case of air lock as well. Open the tank cap and let some air in. Check again.

Seniors and DIY bosses, plz pitch in!

I don't have much experience with these tuning so talking about AFR might be unnecessary here. My apologies. I got my bike only yesterday and while driving from the dealer didn't feel this issue as the dealer had pulled in a bit of choke lever which I only noticed today morning. Please read below to understand the issue. I closed the choke lever tried to kick start the bike several times but it didn't budge. So, pulled in the choke and Whoa bike started in the first kick itself and was also idling beautifully without push of throttle. Now, problem is here as soon as I closed back the choke lever, the bike engine stopped and won't start unless I pull in choke. I was getting late for office, so started closed the choke and drove the bike but found the issue while waiting in traffic that I cannot wait in neutral unless I keep pulling a bit of throttle. Yes, I have around 7 liters of oil. So, please help.

I don't have much experience with these tuning so talking about AFR might be unnecessary here. My apologies.
I got my bike only yesterday and while driving from the dealer didn't feel this issue as the dealer had pulled in a bit of choke lever which I only noticed today morning. Please read below to understand the issue.

I closed the choke lever tried to kick start the bike several times but it didn't budge. So, pulled in the choke and Whoa bike started in the first kick itself and was also idling beautifully without push of throttle.
Now, problem is here as soon as I closed back the choke lever, the bike engine stopped and won't start unless I pull in choke. I was getting late for office, so started closed the choke and drove the bike but found the issue while waiting in traffic that I cannot wait in neutral unless I keep pulling a bit of throttle.

Yes, I have around 7 liters of oil. So, please help.

Read the owner's manual,find your Idle speed screw with a black knob,turn it little clock wise .set your idle speed as 1.5krpm. It is on the kicker side on the carb.

Ok, if this is the case then you (may indeed) have to set the AFR. Take it to the SVC and it'll be done in 10 min flat. That way you'll get to see which is exactly the AFR screw and you can do these things by yourself in future.

Thank you very much, both of you. I will try what you said.

Any change to the AFR will affect the FE...A AFR setting of 3.5 turns Anti Clockwise is slightly rich and you will get around 32 Kms in city and about 42 on highway...The engine will not heat up and low to mid RPM range will be good in acceleration . 2.5 turns is meant for FE and you are likely to have cold start problem and engine heating.
For my riding style I prefer 4~3.5.

Like i said before a lean AFR with 2.5~2 turns will give better FE but poor low and mid acceleration.Engine heat will also be more.



The way to set it up is as follows...
for better FE...35 Kms or above..
1. Turn AFR screw Clockwise GENTLY till it stops.
2. Turn AFR screw ANTI CLOCKWISE by 2.5 turns .
3. Start engine and warm it up by either idling for 10 minutes or take a ride for 5 Kms.
4. Set idling RPM at 1,500.
For better Low and Mid acceleration: with FE of 32~35
1. Repeat step 1 as above.
2. turn AFR screw Anti Clockwise by 3.5 Turns.
3. warm up engine and set Idle RPM at 1,400.~1,500.

For increase in FE overall,
1. change Spark plug to NGK DPR 8 EGP " G " Power plug
2. use thinner 10W30 engine oil...This will ofcourse increase engine temperature and rough running..compared to 15 or 20 w40.
3. Ensure you have a clean Air Filter and replace Air Filter every 8 K kms, more in dusty environment.
4. Change Spark Plug every 12~10 k kms.

You know what, if your bike is dying down at signals it may be running on low idle.. Set your idling at prolly 1200 (1500 when hot) and you should be fine to around.

The Idling screw is just below the tank with plastic head.

For AFR Tuning..

You know what, if your bike is dying down at signals it may be running on low idle.. Set your idling at prolly 1200 (1500 when hot) and you should be fine to around.

The Idling screw is just below the tank with plastic head.

For AFR Tuning..

Here is the complete Bore Piston dimension and clearance data...thanks to Ashwinprakas

Very helpful info there,PSR sir Scan copy is very small in size therefore hard to see those readings,will update here about zma

You know what, if your bike is dying down at signals it may be running on low idle.. Set your idling at prolly 1200 (1500 when hot) and you should be fine to around.

The Idling screw is just below the tank with plastic head.

Thank you for the input. I will try once I get home and post back the result.

WOW !!! Thanks for pitching in and good of you to dig up an old post....even i had forgotten if i had posted it.......
Here is a Picture to identify the AFR screw....wonder why the confusion ,and opening of the Petrol Bowl bleed screw !!!!!

Go back a few pages, I had posted links to download the entire CRF230 service manual. Its around 200~300MB total.