Re: Hero Honda Karizma ZMR

How does it have increased fuel pressure? The fuel pump runs cooler, and there are lesser chances of a short circuit and hence an electric fire..

Re: Hero Honda Karizma ZMR

@Akkiben - If the light blinks (on the console), note down its pattern and search back a few pages. I faced it during one day out of the blue. In my case, it was a short circuit, err, 2 wires touching one another near the headlamp assy.

One more thing, a weak battery or loose connection from it also causes the same.

Re: Hero Honda Karizma ZMR

@rreneav1987 : No, prior to stripping of the fairing the malfunction lamp never came on except during ignition turn on. This happens after that, during self start. It just comes on and goes, it never props up after that, it even doesnt blink. I strongly suspect the plug not being inserted properly. Could you tell me how this can be un plugged, cant see any notches. Hope i havent broken anything. This is becoming one miserable day.

@Divya Sharan : No, no blinking pattern as it does not blink, i had saved the chart that day itself and had a look this morning too.
A weak battery is not ruled out here, or any possible short/open circuit, but things have been good in the past.

Re: Hero Honda Karizma ZMR


For one, the pump is larger. Secondly, since its submerged and the suction nozzle is pointed downward while its working it is helped by the.........eh.......... I'm gonna say osmotic pressure? Is that right? I mean that gravity causes the fuel to basically force itself into the suction nozzle when the pump is working which means suction and fuel + air pressure pressing down on the fuel to get it into the fuel pump resulting in lower effort and increased flow. Though the zmr pump is also below the tank, its not the same. Also putting the pump in the tank means the size can be increased without causing it to be too big to fit and as I said, fuel pump in the tank means very little unusable fuel.
I feel I haven't adequately explained, maybe I'll try again once I find the right words. In the mean time I hope you get the jist of it bro.

Re: Hero Honda Karizma ZMR

Going by what you are saying, I would suggest get your battery checked.. Check the battery terminals for deposits.. this used to happen on my bike before the battery was about to give up..

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is this a theory of yours?? The Fuel pump of ZMR is too powerful. I have felt the pressure when I had to fix the Injector Joint for my bike which was broken I don't know how! But yes, that could be a reason why your bike gives less mileage

Ok, the Duke 390 needs more fuel to be burned compared to the ZMR and probably that is the reason your bike has a bigger pump.. On the Other Hand, the RE FI Fuel Pump is puny

Re: Hero Honda Karizma ZMR

[MENTION=27501]rreneav1987[/MENTION] : Battery would remain disconnected from leads if not in use, i even smeared vaseline on the leads of battery to prevent corrosion.
My battery is the one from factory, never been an issue so far. Let me first take the bike for a long spin and allow the battery to charge good and then re-check.
I will revert with feedback soon.

Re: Hero Honda Karizma ZMR

Check this:
PGM-FI Light - Honda CBR250R Forum : Honda CBR 250 Forums

0 No blinks • Engine does not start

• Open circuit in the power input and ground wires of the ECM: • Faulty bank angle sensor
• Open circuit in bank angle sensor related wires: • Faulty FI IGN relay: • Open circuit in FI IGN relay related wires
• Faulty engine stop switch: • Open circuit in engine stop switch related wires: • Faulty ECM: • Blown FI IGN fuse (20 A)
• Blown ST. KILL fuse (10 A):

0 No blinks • Engine operates normally
• Open circuit in MIL wire: • Faulty combination meter: • Faulty ECM

0 Stays lit • Engine operates normally
• Short circuit in service check connector wire: • Short circuit in MIL wire: • Faulty ECM

Full forms for ECM, MIL etc are in the above link.

Re: Hero Honda Karizma ZMR

[MENTION=27501]rreneav1987[/MENTION] he never mentioned zmr pump is not powerful. What he tried to say was that pumps inside the fuel tank push the fuel whereas the ones below the tank pulls fuel. Dot.
anyway here are the spark plug pics.. ( [MENTION=53321]abhi7013[/MENTION] [MENTION=32286]psr[/MENTION] sir [MENTION=41586]Divya Sharan[/MENTION])




Notice that patch on the exhaust.. What is that?? I tried to scrape it off but it didn't go. Seems like some part of metal is welded onto it..

Re: Hero Honda Karizma ZMR


Ok first off, I don't theorize. I did say I owned a zmr right? The fact that you could feel the suction of the pump is proof of how much effort it takes the zmr pump to suck fuel. In comparison I felt the 390 pump is more relaxed but it also manages with ease to suck fuel at a higher rate. So you see its not based in a theory, its based on my observation and the fact that d390 fuel pump is bigger (don't know about capacity but at least size wise).
But for what its worth the zmr I owned never gave me any problems at all as opposed to the 390 which made me pretty much camp outside the svc.
Also , jeez bro stop saying the 390 drinks fuel man. :O I literally feel like I have mother earths throat in my hands as if I'm killing her. The duke has a city average of 30kmpl which is awesome for a 400cc bike I think. Don't you? 😎

Re: Hero Honda Karizma ZMR

Just something out of the random. In carbs the bigger the venturi the lesser the intake velocity and the smaller the intake venturi the higher the intake velocity.

A practical application would be using two different straws of different sizes. The smaller one would suck in with more force with respect tot the bigger one, but with respect to quantity the bigger one would always deliver more.

Have a nice day

Re: Hero Honda Karizma ZMR

I love the 390 man! Awesome !!

Sent from my C5502 using xBhp Connect mobile app

Re: Hero Honda Karizma ZMR

Am not good Inspecting spark plugs! [MENTION=41586]Divya Sharan[/MENTION], [MENTION=27501]rreneav1987[/MENTION], what do you guys think? Also i see a kind of rust formation on the plug's body. What's that?

Sent from my C5502 using xBhp Connect mobile app

Re: Hero Honda Karizma ZMR

Holy Cows, you are active on xBhp. You are the one whom i tag whenever it comes to an issue with Karizma and ZMR..
Buddy, it looks like your bike is running lean just like my bike.. i am also looking for a solution.. the one solution that was given to me was clean the Fuel Injector.

Remove the injector and take it to a car mechanic.. [MENTION=32286]psr[/MENTION] sir or [MENTION=41586]Divya Sharan[/MENTION] might be able to assist you better. Even @ashwinprakas and [MENTION=28527]sibun[/MENTION] are experts..

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Re: Hero Honda Karizma ZMR

Diesel engine workshops for cleaning injectors.

Sent from my C5502 using xBhp Connect mobile app

Re: Hero Honda Karizma ZMR

Alright, so i returned after doing a run to see if there are any other issues and see if the battery was fine, here are my observations...

@Divya Sharan and @rreneav1987 : You guys were spot on about the battery being weak. Yes i rode my bike to my friend's place and back(30mins run approx.) and the battery was showing clear signs of being weak but not not very weak like trips and clock getting reset during ignition. Well, i atleast feel good that i was able to get to the bottom of this(hopefully).
I have now disconnected the battery from bike and placed it for charging. This is the first time im charging this, because usually when the battery is down due to long storing of bike i push start the bike on 2nd gear and it charges to full on subsequent running or in most case of storing my zimmer i disconnect it from the leads.

Do you guys think i need a different charger for this type of battery(MF/Sealed type)?

Oh yes, the biggest glitch that i did notice while riding was the rear brakes are not effective. I did remove the rear wheel completely when i did the chain overhaul(To remove rear sprocket). I don't know whether this has caused the issue. Can anyone tell me how to adjust or tighten the rear brake calipers... im only familiar with drum brakes.

And is it okay to see water spurting out from the exhaust hose(Below the silencer/main stand) during starting of bike after long time?? Im quite used to seeing this on my zimmer but today there was more water spurted.