Re: Honda Unicorn Dazzler

Hi guy I m join the community, I have honda dazzler(2012) feel happy with bike n heard from good review about dazzler in this community so it's helpful thanks to all who stick with dazzler n post good tips..... Thanks

Re: Honda Unicorn Dazzler


Ceat has the Milaze series. Its a good grippy tyre and stock size is available. It is soft compound when compared with MRF of the same size and it corners well.

Re: Honda Unicorn Dazzler

I have retune carb of my dazzler many times.but not have fe more than 42 kmpl even in good driving. Spark plug always show some blackish carbon.then i change afr screw to some other bike .after that spark plug turns in to white(lean afr ratio).then after retune get the point where plug color turn into reddish.now having mileage of 48kmpl.

Old afr screw



New one from unknown bike

Re: Honda Unicorn Dazzler

Last week, my bike broke down because the drive shaft went bald. A local mechanic did a temporary fix by screwing the front sprocket tightly with the shaft and the sound that we are talking about was gone. Now, I've given my bike to svc go to replace drive shaft and it may cost around 2000-3000. I highly recommend that you check your drive shaft because your bike might break down any time.

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Re: Honda Unicorn Dazzler

I changed the drive shaft and the noise is completely gone. It costed around 2000 bucks..

Re: Honda Unicorn Dazzler

Do you have a photo of bald drive-shaft? Honda returns replaced parts right?

I'm assuming afr-screw referred here is pilot-screw, if not ignore the rest of the post.

1. I can't find what type of carburettor is used in Unicorn Dazzler. What's the name of the carburettor used in Dazzler?
2. Pilot-screw only plays major role in idling. Minor role in mileage as it only come in to play in first quarter(25% or 1/4) of throttle.

Found a picture (courtesy: plasmabhai) :


Generalised Carb-Jets:

Re: Honda Unicorn Dazzler

Nope I do not have any pic neither did Honda return the part

Sent from my GT-I9300 using xBhp Connect mobile app

Re: Honda Unicorn Dazzler

Dazzler have keihin carburetor.

Re: Honda Unicorn Dazzler

Well damn..!! Just what I suspected. Will definitely get the drive shaft changed asap. Thanks for keeping me posted. Really appreciate it. If its not too much of a problem can you please take a pic of the service bill and post it here (or to me via a pm)?? This way it will be easy for me to explain to service center what is the part number of the spare which needs to be replaced.

Thanks for crediting me for the pic. For what its worth - that screw pointed to in the picture is indeed the AF screw :P

There seems to be a bit of confusion between screws and jets. The screw which vjxm has replaced is indeed the AF mix screw. It is NOT same as the pilot jet as you are assuming. There is nothing called as pilot "screw". Jets have a hole through them whereas screws do not have any hole in them.

The AF screw plays a major role in stable idling, easy cold engine starts and crisp throttle response.

Pilot Jet on the other hand plays a major role in mileage because in normal riding situations where you accelerate slowly and smoothly, the throttle opens only enough for the Pilot Jet to be active.

However the transition from idling to throttle opening is governed by AF Screw. When the throttle is opened then there should be no lag in engine revs, this is what is referred to as a crisp response. And rise in revs should be smooth. Sometimes if AF screw is not adjusted properly then there can be a lag in the way revs rise. To compensate people turn the throttle more going into the needle jet range at low speeds leading to low mileage.

May be that's why changing the AF screw led to a big gain in mileage for vjxm.

Just to put it on record though - there is nothing wrong with the AF screw of dazzler. My AF screw is stock and idling, cold starts and throttle response is perfectly fine. I am running stock pilot jet, stock needle and a Karizma Main Jet on a 170cc big bore and currently I am getting a mileage of 47-48 kmpl consistently since last 1500 kms at least. So there is nothing wrong with the stock carb of dazzler as such.

Re: Honda Unicorn Dazzler

Now again i am facing a low mileage issue,with little blackish spark plug.
Clean the carb throughly. But no solution to my problem.

Take some pics of Dazzler carb Jets
I want to confirm, is these are stock jets or changed. As i am 2nd owner of this bike.

I m thinking to try some lesser size of main jet about 100 -110.






What can be reason for low mileage issue.

Re: Honda Unicorn Dazzler

I thought this AFR-Screw only affects Pilot-Circuit.

Re: Honda Unicorn Dazzler

Yeah I can confirm from the pics that your jets are stock.

People get 50 kmpl easily from stock jets. Don't go to lower jet sizes for mileage, if you lean out your mix too much then it can lead to engine over heating or in extreme case engine seize. Besides its extremely hard to procure different jets for Keihin carb because jets are not available. UCAL, Mikuni carbs have inter changeable jets - but they don't fit Keihin.

The reason for low mileage can be as simple as improper riding habit. Or it may be a wrongly tuned carb, i.e. the jets may be fine but the idle screw, AF screw may not be set properly. How does your engine idle? Is it rock stable or does it show minor but continuous fluctuations when idling? How are your cold starts? Do you need to use choke in the morning? Do you need to give slight throttle on cold engine to keep it running or once after cold start your engine idles on its own? Do you smell a little bit of petrol in your exhaust under engine idle? Is your exhaust pipe opening dry and sooty?

The answer to each of these questions can give you clues about how your carb is tuned.

AFR Screw affects the tune at throttle 'closed' position. The Pilot Circuit is the one when throttle is between 'just open' to '1/4th open'. The Pilot Circuit is controlled by the 'Pilot Jet'.

Re: Honda Unicorn Dazzler

Ok.

What's the source of Air-Fuel mixture for idling when throttle is closed inKeihin VM28?

Re: Honda Unicorn Dazzler

When the throttle is closed, the butterfly valve is completely closed. However there is a small opening on top of the valve which routes a small amount of air into the engine. This air sucks up petrol from a fuel inlet. This fuel inlet is metered by AF screw.

Re: Honda Unicorn Dazzler

Find this picture of carb which describe afr screw role.there is a idle port which help the bike to stay idle even in fully closed throttle.