Announcement

**MidnightEvil Parth** · 05-14-2013, 05:00 PM

Re: Discover 125 ST extreme mileage drop issue

Originally posted by anindyamani View Post

Point 3: Can you explain "insert some wire inside engine cylinder and measure something on some machine and got bike out in 5 min". I suppose the mechanic would have adjusted the idle rpm level.

He checked the mileage of the bike

Sent from my Xperia using xBhp connect android app

**MidnightEvil Parth** · 05-14-2013, 05:03 PM

Re: Discover 125 ST extreme mileage drop issue

Originally posted by ShantanuD View Post

Hello all,
I bought a discover 125 st about a month and a half ago. Have ridden it for 800 km and got the first servicing done.
Before servicing my mileage ............

Can you post a pic of your spark plug?

Sent from my Xperia using xBhp connect android app

**Cleaner** · 05-14-2013, 05:09 PM

Re: Discover 125 ST extreme mileage drop issue

I guess the carb is not set properly. Take it to a good mechanic who knows how to tune carbs, or better yet, do it yourself.

**MidnightEvil Parth** · 05-14-2013, 05:12 PM

Re: Discover 125 ST extreme mileage drop issue

Originally posted by Cleaner View Post

I guess the carb is not set properly. Take it to a good mechanic who knows how to tune carbs, or better yet, do it yourself.

Hmmmm right.....get your carb set.....the reason I asked you for a spark plug pic :P
I would say do it yourself.....you will learn something new too..

Sent from my Xperia using xBhp connect android app

**abdriver2000** · 05-14-2013, 09:51 PM

Re: Discover 125 ST extreme mileage drop issue

bike jumps and shut down when put in 1st gear after a gap of 10-12 hours or more.
^^
This is a common issue. I dont know the solution to this but there is a workaround. Hold the clutch and give a few 'empty' kicks. Then start the bike. The jumping stops

**ShantanuD** · 05-15-2013, 12:15 AM

Re: Discover 125 ST extreme mileage drop issue

Hello all. Thanks for replying. I will try to post the photos of spark plug tomorrow. Btw what does tuning carb mean?

**jethmalani25** · 05-15-2013, 12:53 AM

re: Bajaj Discover 125 Owners Reviews and Experiences

relax brother there is no biggie of all wht u mentioned

1 tighten chain, keep it lubricated, keep OKS chain spray with u and religiously follow it
2 about jerk, it happens cos this bike has high torque for the given cc, hence it jerks if u dont use it for around 7 to 12 hrs as u said, when u strt ur bike after long haul just zero throtle, engage full clutch and slowly move to first gear.., it will help
3 its nothing but rpm adjustment, and since this is ur first oil change bike take time to adjust, it will improve gradually...

:thumbup:

Sent from my GT-P3100 using Tapatalk HD

Sent from my GT-P3100 using Tapatalk HD

**ShantanuD** · 05-15-2013, 01:09 PM

re: Bajaj Discover 125 Owners Reviews and Experiences

I dont understand how it will gradually improve, considering it is giving me 30 kpl mileage!! and correct me if i am wrong, rpm idling adjustment can be done by that little screw near the carb area right? dont know what he did with machine then.

----consecutive posts auto-merged-----

ok here are the conditions in which I ride:
- Gears -- 1st till 10, 2nd till 20-23, 3rd till 30-33, 4th till 40
- max speed 50
- ocassional speed bursts till 60 kph. Might have done not more than 7-8 times
- ride 5th gear most of time. even when speed is about 20-25. but that hardly ever happens.

From the way I see it, it's only me who is getting this low average. Some people have reported 60+ average, looks like a dream to me

I dont trust bajaj mechanics at all now. Shall I take the bike to the local mechanic? Maybe they can better assess the problem

**abdriver2000** · 05-15-2013, 03:48 PM

re: Bajaj Discover 125 Owners Reviews and Experiences

^^
Can you try changing your petrol bunk. We already had 1 person on this thread report good mileage after changing his regular bunk. Sometimes nothing is wrong with the bike, just the qty and quality of fuel is suspect. Also check if your breaks are jammed. Your tyres should be rotating freely atleast 3 or 4 full circles.

**Cleaner** · 05-16-2013, 12:20 AM

re: Bajaj Discover 125 Owners Reviews and Experiences

Originally posted by ShantanuD View Post

I dont understand how it will gradually improve, considering it is giving me 30 kpl mileage!! and correct me if i am wrong, rpm idling adjustment can be done by that little screw near the carb area right? dont know what he did with machine then.

He probably used a digital tachometer as 125ST doesn't have a tachometer. He set the idle speed but AFAIK the the AFR settings affects mileage more. Close the AFR screw till it's mildly tight (don't try to tighten it like a nut), count how many turns you had from the current position till the nut is tightened. Now loosen the screw till you get a good air fuel ratio, should be around 3 1/2 turn, not sure though as I'm not familiar with Discover 125ST, it'd be great if somebody posts the factory position of the AFR screw.

**ShantanuD** · 05-16-2013, 01:00 PM

re: Bajaj Discover 125 Owners Reviews and Experiences

what is AFR? guys I am a noob here. dont know this much about bikes. kindly explain. full forms will be appreciated.!!

Anyways, I will go to bajaj servicing and rattle the manager about this issue. Will try to get it done.

**Cleaner** · 05-16-2013, 10:55 PM

re: Bajaj Discover 125 Owners Reviews and Experiences

Air fuel ratio screw. The screw on the carb that controls the ratio of the air and fuel entering the combustion chamber. Start from here https://en.wikipedia.org/wiki/Carburetor BTW are you sure you are calculating mileage properly through the reserve to reserve method?

**pankupremi** · 05-18-2013, 01:49 PM

re: Bajaj Discover 125 Owners Reviews and Experiences

hi frnds,,

got my rear tyre changed today,, coz after 4800kms yesterday i finally fell off the bike, first time after purchasing 125st got to smell the mud on the road,,,

i live in very small town so didnt have much options to choose from,, my rear tyre is now ceat 100/90, 55p tubeless, cudnt get 50p tyre.. 10km ride since then.. feels much confident now. going for long ride tomorrow,will post my experience with the new tyre later.

hv a great day frnds

**vicedens2002** · 05-18-2013, 03:04 PM

re: Bajaj Discover 125 Owners Reviews and Experiences

So 100/90-17 tyres fits on stock rims.. Did you remove the rear mudgaurd due to new tyre size or removed due to style ?? BTW what tyre is it ??

Sent from my Desire HD using Tapatalk 2

**pradeepa** · 05-20-2013, 06:37 PM

re: Bajaj Discover 125 Owners Reviews and Experiences

Originally posted by Cleaner View Post

He set the idle speed but AFAIK the the AFR settings affects mileage more. Close the AFR screw till it's mildly tight (don't try to tighten it like a nut), count how many turns you had from the current position till the nut is tightened. Now loosen the screw till you get a good air fuel ratio, should be around 3 1/2 turn, not sure though as I'm not familiar with Discover 125ST, it'd be great if somebody posts the factory position of the AFR screw.

Cleaner and your mechanic is right that the AFR settings affect the mileage. The mechanic probably inspected the colour of the wire after running the engine in idle. Depending on whether the AFR is a richer mix (more fuel) or lean (more air), the colours will be different. But note that all bikes don't have the same AFR settings. Running with a AFR setting which is too lean will improve mileage, but will damage your engine by over-heating it. This is because the flame spreads to all corners of the combustion chamber and damages parts which are not tolerant to high temperatures. Running too rich will not harm the engine, but will cost you more fuel.

Announcement

Bajaj Discover 125 Owners Reviews and Experiences

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment