[JozfGT]

Originally Posted by BUSA

Read this article here, thought since 99% bikes sold in India are Carbs, this would be helpful.



Source

I remember going through this thread even before becoming a member of Team-BHP. This is the kind of DIY instructions people are looking for. You have pointed out all the necessary details and hats off for that. I have done carb tuning after referring this and some other websites. Carb tuning as you said, is a handy talent to have for a rider.

Right now, I am thinking about repairing a spoiled carb on my Lamby 150. It overflows whenever I try to ride it on a higher rev for sometime.

[revvharder]

Need some advice on tuning Carb of my Splendor ismart 110 BSIV, when the bike was new it wouldn't start after parking in sun and when i complained this to ASS they said they are facing complaints of the same but do not have any solution later i turned to a local mechanic even though he was a good mechanic but he wasn't able to tune the carb properly which resulted in the bike unable to start in the morning without choke and the same starting issue after parking in direct sun.

I watched a few youtube videos even though none were of my particular bike i tried tuning the carb myself and have eliminated the morning starting problem though it has a slight hiccup while accelerating when cold, runs fine when warmed up and as it has been raining a past few days wasn't able to park in sun and check.

Read a few posts on different websites thinking i'll get it perfect but now i am totally confused as i wanted to know whether turning the screw clockwise in my bike makes the AFR richer or leaner.

[ashwinprakas]

Originally Posted by revvharder

Need some advice on tuning Carb of my Splendor ismart 110 BSIV,

Presuming your Splendor has the Keihin PB16, it comes with an Air Screw unlike most bikes with a CV Carburetor.

Opening Screw makes it leaner, Closing Screw makes it richer.

Regards,
A.P.

[scorpian]

Ashwin is right.
Approx 1-3/4 is what I used to set it at and ran good. Your starting issue in sun could be due to air lock in tank due to evaporation.
Check your tank cap properly. Or next time you have this issue open the tank cap and then try starting it. Used to happen in my karizma.

[Scarlet_Rider]

Have a query not related to carburetor tuning however thought of posting it here. Yesterday I replaced the fuel pipe of my 2007 Bajaj Discover 135. The old one was cracked and leaking fuel. After replacing the fuel pipe I was able to start the bike and it is running fine. However I noticed that there is another pipe whose one end is connected to the carburetor but the other end is open. It's not connected anywhere. Any idea where the other end needs to be connected? Pictures attached for your reference.

[srini1785]

Originally Posted by Scarlet_Rider

Have a query not related to carburetor tuning however thought of posting it here. Yesterday I replaced the fuel pipe of my 2007 Bajaj Discover 135. The old one was cracked and leaking fuel. After replacing the fuel pipe I was able to start the bike and it is running fine. However I noticed that there is another pipe whose one end is connected to the carburetor but the other end is open. It's not connected anywhere. Any idea where the other end needs to be connected? Pictures attached for your reference.

I'm not 100% sure but it might be the excess fuel drain. Anyways if there is no problem with the bike then it probably does not go anywhere. Is that a keihin?. if so you can check online with their data sheets.

[scorpian]

@scarlet rider
The other pipe can be left tied with a zip tie near the airbox or under the tank.

That's a keihin cv carb.

[Scarlet_Rider]

Originally Posted by scorpian

@scarlet rider
The other pipe can be left tied with a zip tie near the airbox or under the tank. That's a keihin cv carb.

Thanks Scorpian! Will do as mentioned.

Originally Posted by srini1785

I'm not 100% sure but it might be the excess fuel drain. Anyways if there is no problem with the bike then it probably does not go anywhere. Is that a keihin?. if so you can check online with their data sheets.

Thanks Srini! Yes, it is a Keihin. Took few more pictures today. There are various letters and numbers mentioned on the carb at various places.

A question to all. Can we identify the exact model number of the carb based on the below pics? If so I can try searching for the data sheets online.



There is another small pipe next to the fuel line but it seems to be closed. Hope there is no missing pipe on my bike.



There are various letter and numbers like 22, M3, JN, AJ7AFV1C on the carb at various places.



On the other side of the carb, there are letters NCV.



Do a combination of any of these make up the model of the carb?

[amol4184]

Originally Posted by BUSA

Read this article here, thought since 99% bikes sold in India are Carbs, this would be helpful.



Source

Wow.
This is written by a tbhpian - yours truly!

All this time and I never knew it was here. Been on t-bhp since 2007!
Wrote it when P200 was new and blogs were all the rage on the internet.

Inputs were taken by someone at Bajaj pro-biking showroom in Kothrud, a Mr. Vivek Pendharkar. Fond memories of the bike and the time. Loved that bike to bits.

I remember searching for hacks and DIYs was much harder simply because scarcity of the resources. Fast forward to today and there is such abundance of information it's just incredibly overwhelming.

[adrian]

Planning a Leh trip in my Royal Enfield Standard UCE 350, which is equipped with a BS29 CV carburetor. I have a spare BS29 CV carburetor with me, which I intend to tune and keep as spare for use in higher altitudes. So the question is, where can I find different (lower) sized jets for the BS29 CV carburetor (UCAL). Remember reading somewhere that some Pulsar models have the same carburetor but with lower sized jets.

I think that the pilot jet size is 12.5 and the main jet size is 115 for the Bullet 350 UCE.

Thanks in advance

regards adrian

[Mr.Boss]

Originally Posted by adrian

where can I find different (lower) sized jets for the BS29 CV carburetor (UCAL). Remember reading somewhere that some Pulsar models have the same carburetor but with lower sized jets.

Credit: https://www.bcmtouring.com/forums/th...17139/page-842

[masterChief007]

Playing around too much I have managed to mess up my bike's carb settings. Didn't do anything with the CB points but did extensive tinkering with the carb between 1.5 and 2 turns. Based on many videos the carb is cold but I never got water condensation in the silencer.

Mine is VM24 running in Bullet Std350 CI.

After restoration of my bike, the AUX screw was loosened around 3-4 half turns, I have set it back to shut (defenitely don't want a lean engine with a history of seizure). And the AFR was loosened to 2 turns. I have currently kept it at 1.75 turns for AFR, as didn't see noticeable RPM change between 1.75 and 2 turns (I don't have a tacho, but might just do an arduino project regarding that), and I would prefer a richer engine than a lean.

Off late noticing stuttering and jerking of engine (as if vehicle is hitting reserve) when cold and throttle is opened 1/8th, the symptoms reduce with hotter engine. My guess will be that somehow carb has collected dirt, or could this be due to the setting has gotten richer?

Will take it to mechanic and see what he has to say.

[(Alok)]

Bhpians
Below are the snaps of a BS 26 pulsar 150 carburetor.

I need a clarity about the circuit hole marked in ‘red’, what circuit is this?

In below snap between 1 & 2, which one is choke circuit and what other one is?

Thank you

[Enviroclan]

No 1 in the picture is fuel inlet where the float pin sits. Just below it is the Main jet seems to have been removed as picture shows. I am not sure of No.2 in the picture. In yamaha Ray scooter that part is covered by a plastic tube. Maybe other Bhpians can help us. As for the two holes one marked red goes straight to the emulsion tube. One above it is for pilot jet circuit. Correct me if I am wrong.