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**wings_of_fury** · 06-18-2009, 09:55 PM

Originally posted by anshul uniyal View Post

Dude this happens with me once a month or two. It's a common issue in zma. Whenever this kind of thing happens, just open the tank lid and she will come back to life

The culprit is the small air hole in the tank. Was discussing this with the service centre manager and he pointed out the flaw in designing the tank. So, i guess we will have to live with it. I have stopped pondering over this flaw.

and i thought it was an issue with my zma only! Mine too stalls 2-3 times a month, thankfully i know that to do..just open the fuel lid for 4-5 sec and it roars off again..is there any way to resolve it man??

Originally posted by elangoas View Post

Hello Xbhp-ian's, Some interesting facts on ZMA.

My ZMA is close to 4 months old, done around 8K kms till date. I was constantly doing 80 - 90 on the Speedo, i slowed down couple of time, but didn't go below 40 Kmph. Assuming that the slowdown latsted for a very few secs, which is negligible, I Covered a diatance of 22.5 Kms in 19 Mins which approx translates to an average speed of 71Kmph which is near accurate. So doing 80 - 90 Kmph on a ZMA, is ~ 72 KMph. There is a huge speedo error of 15%. Has anyone fancied chances of calculating these...

Guess using a speed gun may be more fruitful and accurate, if u have it that is

Or maybe ask a friend to try it out..

Regards,
Himanshu

**ravi@17bhp** · 06-18-2009, 10:31 PM

Originally posted by elangoas View Post

Hello Xbhp-ian's, Some interesting facts on ZMA.

My ZMA is close to 4 months old, done around 8K kms till date. I was constantly doing 80 - 90 on the Speedo, i slowed down couple of time, but didn't go below 40 Kmph. Assuming that the slowdown latsted for a very few secs, which is negligible, I Covered a diatance of 22.5 Kms in 19 Mins which approx translates to an average speed of 71Kmph which is near accurate. So doing 80 - 90 Kmph on a ZMA, is ~ 72 KMph. There is a huge speedo error of 15%. Has anyone fancied chances of calculating these...

Your assumptions are completely wrong. From 80-90 speed if you slowdown to 40 it makes a good difference. Moreover, the way you calculated is very much wrong. Compare with speedo of a p220, riding parallel at same speed. A speed gun would be exact weapon to check accurate speed.

In general, karizma has speedo error of around 8% at high speeds (above 110). At speedo indicated 80, the actual speed is 77 kmph.

**ptvvtp** · 06-19-2009, 10:05 AM

Originally posted by nirvan View Post

If there is a weird sideways wobble, have the steering assembly disassembled and check to make sure there are enough bearing balls in the cones, which are located at the bottom and top of the handle "T'. Best to replace them, buy new HH OE cone bearings first (these are loose balls, not the regular bearings we're used to). They cost about Rs. 45/ and IIRC, there are 21 for the top and 21 for the bottom. Your mech will clean the grease from the cones and gently sandpaper them to remove any pits (and advise you to replace if they are worn). Fresh grease then goes in and the new bearing balls are carefuly placed in their bed of fresh grease. This may or may not solve your problem, but it will make a difference in your bike's handling, you will be able to tell the difference right away.

For forks, replace the oil every 12,000 or so km or every two years. It is best to have this done when your cone bearing balls are replaced. Buy a can of Castrol Fork Oil, put 144 + or - 3 ml in each fork.

Hello Nirvan

Thanks a lot bro. That makes a lot of sense!. I was wondering the screw up at the ball bearings would create a yaw effect!?. Anyway I would be able to speak to the guy on the problem!. I am going to give my bike to check up this problem!..Minute problems at high speeds just magnify I guess!.....Thanks Bro

**elangoas** · 06-19-2009, 04:18 PM

Originally posted by ravi@17bhp View Post

Your assumptions are completely wrong. From 80-90 speed if you slowdown to 40 it makes a good difference. Moreover, the way you calculated is very much wrong. Compare with speedo of a p220, riding parallel at same speed. A speed gun would be exact weapon to check accurate speed.

In general, karizma has speedo error of around 8% at high speeds (above 110). At speedo indicated 80, the actual speed is 77 kmph.

What i have provided is near accurate, How do u say that the calc is wrong. I used the Km/h Calc. Even a P220 Digital speedo has error.

**MavericK46** · 06-19-2009, 04:33 PM

^The accumulated errors of your supposedly constant speed (80 or 90 for eg) and that of your assuming you slowed down (Takes quite some time to slow down from 80-90 to 40-50 mate) nearly instantaneously, has hurt the final calculation. Read up on 'The Butterfly Effect' and you'll understand that the 15% error in the speedo is far from the real figure

The Butterfly effect: The Butterfly Effect - Wikipedia, the free encyclopedia

Cheers !

**abhijeet080808** · 06-19-2009, 05:27 PM

Originally posted by elangoas View Post

Hello Xbhp-ian's, Some interesting facts on ZMA.

My ZMA is close to 4 months old, done around 8K kms till date. I was constantly doing 80 - 90 on the Speedo, i slowed down couple of time, but didn't go below 40 Kmph. Assuming that the slowdown latsted for a very few secs, which is negligible, I Covered a diatance of 22.5 Kms in 19 Mins which approx translates to an average speed of 71Kmph which is near accurate. So doing 80 - 90 Kmph on a ZMA, is ~ 72 KMph. There is a huge speedo error of 15%. Has anyone fancied chances of calculating these...

You have decreased the speed to almost half from 80 to 40, for a few moments and you say your calculations is correct? It is not negligible my friend. Also, when you decrease the speed, acceleration back to 80 too takes time.

**elangoas** · 06-19-2009, 05:51 PM

Originally posted by abhijeet080808 View Post

You have decreased the speed to almost half from 80 to 40, for a few moments and you say your calculations is correct? It is not negligible my friend. Also, when you decrease the speed, acceleration back to 80 too takes time.

Ok. Letz assume that it took 60 sec or a Min for the overall slowdown couple of times & to regain 80 - 90 kmph, then i have covered 22.5 Kms in 18 Mins. Even then my avg speed is 75Km/h. So the speedo shows at least 10kms more. Since i waz doing 80 - 90 Km/h.

**abhijeet080808** · 06-19-2009, 06:02 PM

Originally posted by elangoas View Post

Ok. Letz assume that it took 60 sec or a Min for the overall slowdown couple of times & to regain 80 - 90 kmph, then i have covered 22.5 Kms in 18 Mins. Even then my avg speed is 75Km/h. So the speedo shows at least 10kms more. Since i waz doing 80 - 90 Km/h.

75 is more like it. Rest is speedo error.

**livetoride** · 06-23-2009, 10:51 AM

Guys i need some help here, my zma is 1.5 years young. The problem is that both of my rear side panels where Karizma is written are broken from the point where a nuts hold them under seat. Will it be replaced by the service center free of cost as the bike is under warranty..the other question is that the bike givs knocking sound when i increase the speed up from 2 or 3rd gears, i told the service centr 3 times but nothing has changed. What are the probable reasons for knocking ?

**Technician** · 06-23-2009, 11:57 AM

ZMA has a final 5th gear ratio which enables the 16 kmph for every 1k rpm tacho. You can accurately check your speed by this method.
7.7 k rpm at 5th gear translates to 123 kmph.

Through this method the error would be only 2-3 kmph provide there are no high winds, etc. and road is straight level only.

Rather this methods is more useful for all bikes.

CBZ has a final stock drive which enables 11.91 kmph for every 1k rpm.

Enjoy your top speeds and your personal records.

**ravi@17bhp** · 06-25-2009, 04:43 AM

Originally posted by Technician View Post

ZMA has a final 5th gear ratio which enables the 16 kmph for every 1k rpm tacho. You can accurately check your speed by this method.
7.7 k rpm at 5th gear translates to 123 kmph.

Through this method the error would be only 2-3 kmph provide there are no high winds, etc. and road is straight level only.

Rather this methods is more useful for all bikes.

CBZ has a final stock drive which enables 11.91 kmph for every 1k rpm.

Enjoy your top speeds and your personal records.

Nice information there. Never heard of it. But, at 8k rpm my bike is doing only 125 kmph only (speedo indicated which translates to around 119 kmph only). What could be the reason?

Originally posted by livetoride View Post

Guys i need some help here, my zma is 1.5 years young. The problem is that both of my rear side panels where Karizma is written are broken from the point where a nuts hold them under seat. Will it be replaced by the service center free of cost as the bike is under warranty..the other question is that the bike givs knocking sound when i increase the speed up from 2 or 3rd gears, i told the service centr 3 times but nothing has changed. What are the probable reasons for knocking ?

Broken panels will not be covered under warranty. I have once replaced the rear cowls because of the same reason; the joints broke and everything else is normal. This is a clear bad engineering from Hero Honda. They could have given a stronger joints for the panels. It is a shame on them that they could not even sort that out.

As for the 'knocking', try the following.

Clean the spark plug and replace it if needed.
Tune the carb properly.
Change fuel station. Bad quality petrol causes knocking. Fill petrol at reliable pumps.

**Technician** · 06-25-2009, 11:32 AM

Sorry, it is my fault.

It is 15.09 kmph and not 15.90 or 16 kmph.

Gear Ratio kmph/1000rpm
1st 2.769 4.44
2nd 1.722 7.14
3rd 1.263 9.74
4th 1.000 12.30
5th 0.815 15.09

HERO HONDA : :The Empire Strike Back!With KARIZMA

But it is an old piece of info must be available in your service book itself. Strange, never heard of it.

At 8k rpm, the true speed must be 120 kmph or so +/-2/3 kmph.

**dreamz_mak** · 06-26-2009, 02:52 AM

Guys need to know if ZMA needs any special attention apart from regular cleaning and service during monsoons

**ravi@17bhp** · 06-26-2009, 03:16 AM

Originally posted by dreamz_mak View Post

Guys need to know if ZMA needs any special attention apart from regular cleaning and service during monsoons

Buy July month Bike India issue. There is an article on how to maintain bike in monsoons. Pretty much narrative with Zma.

**ragGZ_** · 06-26-2009, 10:22 PM

@all - NEED MAJOR HELP. PLEASE REFER ME TO A GOOD KARIZMA MECHANIC. i gave one of my cousins a Red ZMA 09 (as a gift so cannot ask it back), i don know what he's don but the bike met with a couple of accidents. the bike was bought in Feb, 09. This was his third accident and the jerk off the frustration, took a big stone and threw it on the visor, engine. heard he's banged it around 3-4 times. Don know the severity of the damage. I really need a good mechanic to get things working. Any advised on the insurance part will really be helpful. Also need some advise.

Is there a possibility of the chasis loosing its original shape

In case if there is any damage to the engine, is there any way i can get it fixed.

Please guys, help me with this one thing and will be grateful to u!!!

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