Re: Ambition 135 jerking and engine stopping pulling the throttle to increase the speed

Sorry to see that you had done everything a bike lover never does ..neglecting your ride for so long and letting it to be exposed to the elements for 6 long years...

Jerking of bike with shutting off indicates lean Air Fuel Ratios...with bad petrol water combination, the Pilot and Main jets in your Carburetor are goner...Get them changed immediately from Honda SVC. Please find out what Carburetor you have in the Ambition...normal or CV carb and it's size , if some useful help is required from members. Please do learn about your bike and take good care of it.

Re: [URGENT] Ambition 135 jerking and engine turning off while pulling the throttle

[MENTION=86805]Ambition135[/MENTION], please change the following ASAP if not done already:
1. Fuel float (measures fuel inside the tank)
2. Air filter.
3. Engine oil.

Alongside, get tappets adjusted and set the correct AFR.
Use Iftex System G for a few tank fills after you get the above done. It's available at BP fuel stations.

Re: Ambition 135 jerking and engine stopping pulling the throttle to increase the speed

I dont get it if you are using old tank lid or not but i had this problem earlier with cbz which have same tank lid as yours. If there is a water inside lid, it restricts flow of a petrol.

Re: Ambition 135 jerking and engine stopping pulling the throttle to increase the speed

[MENTION=32286]psr[/MENTION] ....Actually I was sick thats why it happened so you mention of pilot and main jet? where are they located on the carb? whats the difference between normal or cv carb?.. [MENTION=41586]Divya Sharan[/MENTION] ....what are tappets and also I didn't get the float measure at the nearby shop so due to the lack of time I got the same one installed, it had a little rust but I don't think it would spread the rust to the new tank so according to you what other issues can this fuel float cause? and yes I'll get the air filter changed today ! engine oil was changed already .... [MENTION=78170]Darchorse[/MENTION] ...I understand but the bike was already jerking with the old tank and lid and that's why I got the fuel tank replaced.

Re: Ambition 135 jerking and engine stopping pulling the throttle to increase the speed

Tappets are a loose term for valves. Your bike has inlet/intake and outlet/exhaust valves. There's a particular clearance that these must be set to. That range would be between 0.04 to 0.08 mm or so (for both), I don't have the exact figures for Ambition 135 though.
So, "get your tappets checked" means "get your vehicle's valve clearance set to the prescribed range".

Fuel tank float works on buoyancy and a rusted unit will not operate properly. It might get stuck and give improper fuel readings and leave you stranded on the road or it may pass rust and debris to the carb mixed with the fuel.

Re: Ambition 135 jerking and engine stopping pulling the throttle to increase the speed

I'm sorry but I'm unfamiliar with these words and logics. I think its necessary to increase my motorcycle engine knowledge. Do you know any tutorial websites or resources like videos or ppt/pdf documents that I can use to know about all these words and also gain knowledge of the working of the bike engine. Since the mechanic will never tell me any details of the engine and other mechanisms of the bike and they'll keep on tricking me out of my hard earned money by creating fake issues, also as I already mentioned they would never address the actual problem but would rather make temporary fixes to fool me into believing them.

Re: Ambition 135 jerking and engine stopping pulling the throttle to increase the speed

Start with the bike's owner manual for starters.
Also, is your petrol tank's fuel lid changed to a new one? If not, get it done.

Re: [URGENT] Ambition 135 jerking and engine turning off while pulling the throttle


first thing first.

6 years of gunk and still using same carb ?

first thing- get new jets ( idle + main jet for the carb) 2 copper screws inside of the carb.
then replace air filter.
also buy a bottle of carb cleaner and clean it throughly.
replace engine oil and run for 300-400 km and then replace again to clean sediments thats have choked up at the sump.

the engine stalling and not sitting is idle jet gone .
open both copper screws and get jets which are exactly the same.

idle jet ( thin with multiple holes and a centle hole which runs across )
main jet ( thick screw with a bigger hole)

once replaced then set the AFR. tighten the AFR screw completely and then unwind 2.5 turns.

make sure you do all of this after you clean the carb throughly with the carb cleaner.

Re: Ambition 135 jerking and engine stopping pulling the throttle to increase the speed

Sorry to note that you were unwell for a long time...hope you are doing good by now.

Here are some pictures to get you started on carburetors...

The Normal slide carburetor.



The CV vacuum operated slide carburetor..



The functioning of a CV carb..



Here is a link to how a CV carb function clearly explained...

Keihin CV Carburetor Diagrams

Re: Ambition 135 jerking and engine stopping pulling the throttle to increase the speed

Yes, I'm good now, thanks And with the images you provided I can say that mine is a normal carb.Thank you so much for the diagrams and the link. One thing I've noticed that even though the fundamental principles are the same but foreign country bike parts have different structures and even in our country almost all the bikes are different with the structures of their parts thats why if we look up on google and whatever the results are; its always difficult to figure out and learn about the part positions of Indian bikes for newbies like me. That's why I've been struggling to find the correct description of my bike's engine and parts. But your diagrams are the closest to my bike I'm now searching for some repair videos on youtube but still haven't found one and also learning from the diagrams you have provided.

Re: Ambition 135 jerking and engine stopping pulling the throttle to increase the speed

Get the Carburetor,Airfilter cleaned properly,
Adjust the AFR,Idling,Spark plug gap properly also check spark plug colour after adjusting and cleaning.

Re: Ambition 135 jerking and engine stopping pulling the throttle to increase the speed

Sorry for the late response I was a bit busy with an emergency. So I've done everything; air filter changed, spark plug changed, carb jets checked and changed....still the bike is giving jerks and somewhat the jerking and hiccups have worsened a bit with time. Whats next that can be done. The mechanic made fun of my bike and asked me to sell it off for 500/- at a position where I've spent over 7k on its temporary fixes and accessories. I love this bike and believe me this would never happen if it wasn't for my sickness that tied me with the bed for years leaving all of my belongings unattended for a long time. Anyways, the neighbourhood mechanic brotherhood has given up on my bike and are set with a united view that my bike is unrepairable

Re: Ambition 135 jerking and engine stopping pulling the throttle to increase the speed

Still no reply :-(

Re: Ambition 135 jerking and engine stopping pulling the throttle to increase the speed

Have you checked the flow of fuel through the fuel tube from the Fuel knob to the carburetor!! Pull out the tube and check if the flow is fine!! I have a feeling the tubes aren't good..

Glad you got better!!

Re: Ambition 135 jerking and engine stopping pulling the throttle to increase the speed

I believe you're talking about the outlet from the tank at the bottom left side and the knob that is attached to that outlet to which a simple rubber pipe is connected?The mechanic was using the petrol to clean the bike parts from that knob by pulling out the rubber pipe from that knob. The fuel flow from that knob was good and last time when I remember he was checking the carb float he could see the fuel flowing well. Actually, the mechanic checked the carb two days back, it was clean and full of petrol so the needle is also working well.When the mechanic checked the filter it had completely disappeared and turned into a 12 year old dirty loath of fibers and there was also a jali support in the shape of a sqaured hexagon, it was jammed and the pores were filled with rust and it seemed to be made with regular jali that we use in doors and windows. I couldn't find it anywhere and he told me that it will just support the filter foam and will not choke the air so we could use the same old jali, I had to go with that out of no choices. So, I hope it will work fine, that was one thing and the next was, he replaced the spark pkug for the second time in 2 months just to waste my money once again. The third thing was the carb jets; the mechanic said he had already replaced them but I still made him open the carb and clean the jets which he did and it was all clean. He pulled out two long hollow needles from the top part of the carb one with multiple pores and blew air into it from his mouth and then took out another one from another hole and did the same, after that he said it was all clean.Now, a senior mechanic jumped into the scene and drove the bike to come to new conclusion from his expertise, he said that there is an electricity problem in my bike that will be repaired at a special electricity wala mechanic for which I'll need to take even more trouble and spend even more money! I laughed it off and told him straight up that if there was any electricity problem the bike won't even start ! Do you think I was right?? Do you think that there could be any electricity problem in the bike that could cause those jerking hiccups while increasing the speed??