Re: Karizma/Karizma R

My guess is your pilot jet clogged due to bad fuel. I assume the mechanic cleaned the jets when you say 'cleaned the carb.' Bike started running fine after the pilot jet is cleaned. The fact that you don't have much issue at high speeds indicates your main jet to be working fine.

Re: Karizma/Karizma R

bro thanks for your reply.

this issue has happened 2 months back also. yes you are correct bro. the issue was only at low speeds around 40-60 when i slow down and pick up again. should i go ahead and change the jets?

Re: Karizma/Karizma R

Well..if the mech didnt really clean the jets it is likely the symptoms would resurface .. Also check tank and tap for rust residue. If it is present then again it will resurface.
As long as the jets are not damaged you dont have to change them.

On Grand 2

Re: Karizma/Karizma R

thank you acs and ravi bro. the problem resurfaced again, when i'm above to go out. i removed the spark plug and cleaned it and restarted and the spark plug end was very black. i cleaned spark plug and bike started again. then after a hard riding of 100km, i revved a lot and came back home and checked the spark plug and again it was black.
asked mechanics and everyone said different reasons.

after going this entire ownership thread and through research, i'm able to narrow done this problem occurs only when the bike is used at high speeds for extended time and running on a rich mixture.

my guess is that bike is running on a rich mixture, many users and online forums state the same issue and coincides with my bike problem.

i decided to turn the AFR screw on the basis of PSR sir's post.

to my schock, i found the air screw to be jammed. it's fully tightened. this might have been done by a showroom guys as they are last one who worked with airscrew saying that they are tunning it for mileage. i stopped going for services as the bike has passed 30,000kms and svc are charging more for simple work.

what should be done to fix the air screw? one of the mechanic said, they need to remove the carb and take to to lath and remove the AFR screw and put a new one. is that the right thing to do?

Re: Karizma/Karizma R

Do not use excess force on the afr screw..it is likely to get damaged if you do so. Try using WD40 or Zorric to loosen it.
BTW it is highly unlikely that the afr screw is fully tightened. It could have jammed in its tuned position. When was the last time it was tuned?
Posting a pic of the spark plug would have been a good thing.


On Grand 2

Re: Karizma/Karizma R

ACS thank you for the reply. i have wiped off the plug completely, will post the spark plug pics if the issue occurs.

sprayed wd40 spray and tried after 3 hours and i'm able to loosened the screw. i unscrewed it 360 for 4 turns and then slowly screwed it back. reached a postion where no further screwing is not possible. then increased the idle to 3000 rpm and unscrewed 360 degree for 3.5 turns and adjusted the idle according to the manual 1400.

rode the bike at full throttle for 30kms and upshifted every gear at 7000 rpm. the engine response was very good. i hardly ride above 90. during my last trip, the bike felt slow after 110 and it took ages to reach 122 on the speedo. now the response is instant and maxed out at 127.

checked the spark plug and things are fine now. my thanks for PSR sir, acs and ravi bro.

i have gone through the lightining thread and karizma owners upgrading to 55/60 bulb. just to confirm, can i install 55/60w without upgrading stock battery? my battery is stock and running for 3 years now and it has started showing signs of aging. i will be changing soon. should i wait and upgrade to 9ah battery and install 55/60w bulb?

also the bike is idling at 1400rpm and it feel they engine is rising a lot? can i lower it to 1200?

Re: Karizma/Karizma R

I am sure you must have had a wide grin on your face with the new performance. Mileage is sure to drop . But the riding satisfaction is something that money can't buy.. ;-) .If you think the mileage is too low you can try 3 turns.
Use idling adjustment screw to set idling speed.

55/60 watts h/l bulb is plug n play. If battery is weak you may find it difficult to use the starter or the time and tripmeter may reset. If you have a good 9 ah battery then you can use a relay without any issue and you wont ever go back to stock setting.
If you want to extract more performance then try the ZEN MPFI AIR FILTER diy mod.

On Grand 2

Re: Karizma/Karizma R

1) Good that you also read the thread
2) 3.5 full turns out should be good, if you're running rich, you can screw in half a turn (3 turns out).
3) You can use a 55/60 bulb on the stock battery, but it's better that you upgrade to a 9AH.
4) When the engine is hot, set idle to ~1300-1400 RPM.
Also suggest that you upgrade to an NGK G Power spark plug, that will give you even better performance and mileage.

Re: Karizma/Karizma R

It is good to see you taking the initiative to learn and do a DIY...Most of us here ACS,AK3D,Aneez,Ravi Anna, Sriram and me,(just naming a few only)...all have been sharing many info on ZMA, and if you go through the back pages patiently, you will become well versed , and DIYs will be a cake walk.
Like Arun Sir said you must be having a wide grin and the satisfaction of having done it yourself...
Good Luck

Re: Karizma/Karizma R

This is encyclopaedia for karizmas. Many many thanks to all who have contributed to this thread.
:thumbup:

URL removed.

Re: Karizma/Karizma R

gone through the post of ACS explaining fitting of zen air filter in zma. this will be a weekend DIY. I will ping you before i start doing it.

i did unscrew it another 0.5 turn. so it's out by 4 turns now and the bike flies now. the response at top end is amazing.

after owning my bike for 3 years and 36,000kms, first time my speedo needle crossed 130 and did a top speed of 132. i tested it thrice and i was able to hit the same speed again and again. i had a wide grin in inside the helemet.

my next upgrade would be NGK iridium spark plug and 55/60w head light. have bookmarked 22 pages of important on this thread and DIY.

did a tank fill today for 655rs some amount of fuel was already left in. i'm checking the mileage. had done 75kms after filling the fuel.

in my previous setting of AFR screw, i used to get a fuel economy of 35-38. keeping fingers crossed. main difference felt is bike is running free at a speed of 100 in the previous setting it would feel stressed.

thanks to PSR SIR, ACS,AK3d, RAVI bro.

Re: Karizma/Karizma R

You should go for the "G"Power Plug and not Iridium. Your FE will drop now to 31 with 4 turns. Three and a half turns will give you about 32~33 in city and 43+ on highway..

Re: Karizma/Karizma R

Iridium is for high rpm only afaik. From Iridium I have moved to G Power and am satisfied. Cold starts are smooth , choke usage and duration of usage is minimal now.


On Grand 2

Re: Karizma/Karizma R

The joy of DIY can't be expressed - whether it is a heatsink mod for the RR, or merely learning about your bike and its capabilities, and trying to solve problems by yourself (with a little help from the incredibly helpful members in this thread).
Along with Mr [MENTION=32286]psr[/MENTION]'s list, I would also add Mr [MENTION=41586]Divya Sharan[/MENTION] and [MENTION=32641]shv18[/MENTION] to the list of contributors who I've had the pleasure of talking to and who share knowledge without hesitation. Thanks everyone for making this a great place to learn.

Torquoholic from GH right? Welcome to the forum, also look forward to detailing inputs from you . You're absolutely right about this being an encyclopaedia. There is so much information shared that most problems with the ZMA can be easily sorted out just by going through the thread!

Keep the AFR at 3.5 turns and check the plug, no point running too rich. You could even go to 3 turns and see the condition of the plug.
We're all happy that you're bothering to read the ZMA thread and trying to understand things for yourself. With some time and assistance, you'll be helping others here as well!

Re: Karizma/Karizma R

I should really thank @psr Sir for rejenuating this thread and bringing up good topics and discussed which was almost dead when he entered. When I entered this section of the forum in 2011, all the terms and jargons used were all over my head, i.e I come from a 2 stroke world and reading some of the hard topic discussion were a challenge to comprehend. Over the years along with PSR sir I slowly started to learn about 4 stroke in general and ZMA in particular.
Ravi, Aamir, Shiv18, Divyasharan, Aneesh, Ashwin, ACS, Phanikar made this section of the forum even more fascinating with their contributions, most them were hard tourers(sorry guys if I had missed any one). Their real time experiences on their road trip provided a good knowledge bank that I was able to make use of it. It did not stop there, also the enthusiasm shown by the each member here even took the bar to next level, DIY, problem shooting, unconditional help and phone support to name few. Over the years we know each's bike what it had went through and learned out of each's experiences.

I'm not sure if there are bike issues that is not been resolved here. Infact, we have discussed almost till death on headlight upgrading, crash bar, air filter change, spark plugs, tyres, electronics, battery issues..the list goes on. Any new member enters this section of the forum to learn or to trouble shoot an issue, he would not leave empty handed for sure.

Over the years, this forum also taught how to be a discipline rider than how they were earlier. The members in this section were kind enough to help with spares across the borders. Hats off to you all.

ZMA still rocks and its my touring companion.