Re: Karizma/Karizma R

Naveen, cleaned the jets at least 4 times now. Everything appears fine. Bike won't die when then engine is hot, it just fluctuates a bit. When the engine is a little warm, you have to pull throttle a bit to keep the idle. Other than this its okay.

Re: Karizma/Karizma R

I would try replacing the pilot jet, it has many tiny orifices that may be blocked. While you are at it, replace the rubber diaphragm as well. Clean the carb thoroughly with a carb-cleaner spray. My guess (and hope) is your engine woes are all linked to some seemingly inconsequential niggle that is not obvious.

A small anecdote here:

On an Impulse, I bought a 2011 Impulse in May 2013. I soon realized to my horror that the Impulse was giving me about 15 kmpl. Several visits to several mechanics later, things were pretty much the same, kmpl went up to 18 tops with all the vain efforts from the various experts. The bike would let out blackish smoke when revved and the spark plug was always black and oily. Idling was poor and uneven. The guys at the showroom that sold me the bike looked at me as if I were cuckoo when I told them I was getting 15 kmpl. They were looking at me as if I had lost my marbles and/or as if I was some manic freak whose sole purpose was to wreck perfectly efficient Honda-tech bikes. I didn't ride the bike much and that didn't help the diagnostic process either. (I've done 2200km in 7 months on this bike).

In desperation, I opened the carb up a few times, cleaned it to the best of my ability and generally sprayed the life out of it. Jet size was something I kept in mind, but replacement jets were never available. I replaced the spark plug, air filter, engine oil and cleaned the life out of everything that could have been the culprit.

Eventually, I decided to replace the jets; albeit I used the jets from a Unicorn which were easily available in Ramkote unlike the Hero stuff; nothing available anywhere from the Impulse/Hunk/CBZ-X parts bin. The main jet from the Unicorn had an orifice which was pretty much half the dia of the jet in the Impulse. Long story short; my Impulse is now capable of delivering a reasonable mileage and idles smoothly.

I rode to the showroom I bought the Impulse from in Chandrayangutta from Secunderabad just to show the people there the gaping size of the orifice in the main jet. They were sympathetic and perhaps relieved that their freaky 15kmpl customer had somehow figured things out for himself and was out of their hair.

To put things in perspective, my 2007 ZMA never had its carb opened until I sold it ~40,000km and 5 years later. I'm sure it has yet to be opened till today, 7 years since it was bought new. To some extent, this is a rant, but the point of all this is to look where you may have looked before but somehow overlooked.

Keep the faith, I can feel your pain and frustration.

Cheers!

Re: Karizma/Karizma R

Ride it more and nothing to worry. I had asked shoeb yesterday and he said silencer is not having any trace of oil. So let it run like that. Let the head build up some carbon and then we will test compression once again.As for the smoke do not worry as when i re-build my Joy's engine same thing happens for few days and after that it will be ok. The reason for this is that when the bore is new then the honing marks are deep and these traps some oil which burn on engine start at cold. After the engine has gone hot then the rings expand and seals the bore as a result scraps the oil better and thus no smoke. Nothing to worry and let it run for 1000 km and then we will see the compression and smoke problem.Now regarding the carb try to sort it out. Get a new air screw of original make and once again set the mixture. Your air screw has two o-ring one on thread and other at the pointed tip. If anyone is gone bike will pull air from the air screw and make the mixture lean, so change to OE air screw and then test.His problem is not jet. Shoeb has 3-4 times checked it and there is no problem with jet. His problem is idle circuit getting lean because of excess air entering the idle circuit.Regarding your problem, then from the description that you have given of black smoke it was clear case of excess fuel dumping.The jets being large, then let me tell jets never wear out, i repeat never wear out, they wear out only when they are fiddled with wires or pins while cleaning them.My Joys old carburettor is still with me and those jets are still brand new.The most common problems in old carburettors are worn out pilot circuit and worn out bore of throttle body and slide.

Re: Karizma/Karizma R

does the new karizma r comes with tubeless tyres? can i get tubeless tyres installed on it? and i like karizma very much but is there a problem of spares availability? please tell me as i have to buy the bike soon.

Re: Karizma/Karizma R

Replies in bold.

Re: Karizma/Karizma R

But the new air-screw we got yesterday had only one o-ring, even the old one had only one o-ring.

Did we get a wrong part ? [MENTION=11210]ravi@17bhp[/MENTION]
Please post a picture of the label of the air-screw packing.

Re: Karizma/Karizma R

ZMA AFR screw has only one rubber O ring and a metal washer before. Nothing on the threads.

I still feel that if there's an oil leak on the piston rings and it's smoking, it won't be solved anytime soon as they won't settle in properly. We can only know after a couple thousand kms though.

Re: Karizma/Karizma R

A holiday DIY
Adding headlamp relay setup to my zma.

Things procured:
>Copper wire connectors(see images)
>7 pin male and female connector(plucked it from our tractor trailer connector)
>Black spiral pipe(rs 30 for 3 meters)
>Minda relay with harness(pulled it from an old car, new one should cost you around 550)
>Black Insulation tape
>Some ties
>4sqmm wire
>1.5sqmm wire
My idea was to install a relay setup that looked stock so i planned to keep all the relay and fuses under the seat and wire it all the way under the tank till the headlamp.

The relay harness had 2 female ceramic connectors and i removed one. The other one had a female ceramic connector and a male connector to connect to the stock female connector . I placed the relay under the ecu unit and checked for length till the headlamp. The length was less by about a foot so got some 4sqmm wire and 1.5sqmm wire and extended it with the copper wire connectors. Insulated all the connectors with tape and wired the 7 pin socket also. En-capsuled all the wiring in the spiral pipe. I kept the female 7 pin on the fairing side and the male on the tank side. I ran the wiring on the frame under the tank using some ties and placed the tank back. Connected the positive connector to the battery,put the fairing back,switched on the headlamp and it worked like charm. There was no flickering even when i revved it up, brake lamps on, indicators on.

Before insulation and encapsulating the harness.


after insulation


Wiring on the fairing

Re: Karizma/Karizma R

@ Ravi... presence of oil will reduce the flammability of the AF mix and reduce it's calorific value...ie., less power.. I think it is the bent dowel pin and gasket which are the culprits for the oil coming into the combustion chamber....ride as it is for some time, till 1,000 Kms and you will see that the compression will improve .The AFR screw has only one "O" ring...

Re: Karizma/Karizma R

[MENTION=6275]Ravi[/MENTION] and shoeb- Sorry, my bad as karizma air screw has one o-ring and nothing else. While i was mentioning karizma, i was thinking of pleasure air screw so the goof up.As PSR sir said if your dowel pin and gasket are gone then that may be reason of smoke and oil. Its a problem that neither i am there nor you are here, otherwise i would have opened your head and would have seen what the actual problem is.

Re: Karizma/Karizma R

Yes it is a problem to troubleshoot correctly based on hear-say method....still [MENTION=6275]Ravi[/MENTION] is learning a lot and his share here is INVALUABLE... Hope he is able to settle down to a no problem level and start enjoying the ride...

Re: Karizma/Karizma R

And one of the reasons why I did not insist on opening the head again was that the engine needs to come off the frame. It is not only time consuming and expensive but we had to keep everyone's opinion in mind before taking any decision.

So I and Ravi came to a conclusion that if the engine does not stop smoking after 500~1000 kms then we will remove the engine and open the head for inspection. All the required parts such as gasket and dowels have already been purchased.

Re: Karizma/Karizma R

Re: Karizma/Karizma R

guys,
a quick one; I've replaced the stock battery on my ZMA with an Amaron 12V battery about 8months back. whenever I turn on the indicator with the headlight on, I can see a subtle decrease/increase in the lighting. If I use a horn with the indicator on, the sound is like a sine wave.
why is this so? I though the Amaron 12V should be powerful enough

Re: Karizma/Karizma R

Hey Ravi, how is your reboring experimentation going on. Any idea . Any idea as to the fix this my speedo is not working and mechanic told me something I didn't understand he said the stick thing inside the hole is supposed turn inside when front wheel is rotated.

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