Some links might be loose while others might b tight enough to create friction. A full chain cleaning will solve this problem i guess. I wanted to do the same but not getting time for this. Get ur chain cleaned and oiled afterwards

Even i have come to the same conclusion ...10W 40 seems to be just right for Xtreme...it seems the mobil is cheaper than
Shell.

Ok will get it done ASAP ...if the rubber seal is damaged how much will it cost aprox. for the new piston ?

Also sibunji i am hearing some distinct noise from the right side of the engine ie from the kicker side...it sounds like a bell ringing mildly...i dont know how to explain the sound clearly it sounds as if there is a small stone loose inside the engine...on quiet highways when cruising at 80KM/hr i can clearly hear it without helmet but its mild ...when ever i twist the throttle i hear this.... i first thought it was the brake pads loose again so in stopped ..raised the throttle and its clearly coming from the inside the engine on the kicker side...oil level and the pickup everything seems to be fine.

1200 km report

I have successfully completed 1200 km ..

Always drove under 55 km/hr with short bursts upto 60 - 67 km/hr

Morning start on choke and idle for 1-2 min..

Fuel eff On Highways : 55-58 km/lt
On city roads : 45-50 km/lt

Problems faced : Oil leakage from neutral switch
solution found : damaged o-ring of switch

No mods ....Servicing done at 555 km and oil top up at 1100 km...

Engine feels lot smoother than before and also the vibrations are reduced....

I have a small query...At what speeds can i drive my bike now..I am a bit mileage conscious and willing to complete run in till 2000km..

Check if the chain is dirty. Also open the front sprocket cover and check the front sprocket. See if the teethes are bent forward like hook, if they are bent forward, then fit the sprocket in opposite direction or fit new front sprocket. Check the front sprocket, i am sure the front sprockets are like hook.

The master cylinder repair kit is only Rs.245 if you go for KBX and will consist of piston,spring, rubber dust seal,pushrod, and circlip.
It must be from the clutch section. Was your clutch section opened and re-fit without fitting new plates. If so then it might be the cause. Usually if the clutch section is opened and re-fit with old plates a slight sound might come. But i cannot say now until you report back. Then i will be able to help.

For the running till 2k you can maintain a limit of 6k rpm and occasionally gunning till 7k rpm. But most of the time keep south of 6k rpm.

My bike has clocked 6499 km till now. Today, I switched to Castrol 10W 50 Synthetic oil and engine picks speed upto 80 kmph effortlessy. The engine feels very revvy and the throttle response has improved a bit. I rode my bike to 110 kmph for some secs and then i stopped at a small shop. I checked the RPM and it was hovering near 2k. Is it bad ? Also, the engine braking has reduced to some extent. Now, the bike feels a bit scary as i get feeling that lot of power is still untapped. Overall, the feeling is great but don't know if it's good to switch to synthetic so early. Any suggestions ?

Alas, none of the symptoms are there:
1. Chain is absolutely clean - brushed with kero and lubed properly at periodic intervals. No kinks, no jammed links.
2. Front sprocket is perfect - no bends, hooks, etc.
3. Front sprocket cover is clean also along with the chain covers. (In fact I have polished them from inside using Waxpol Orange tin :P )

While coasting/on downhill (in neutral) with ignition off, I can hear a clear kad-kad noise at periodic intervals. When on main stand, when I give the rear wheel a spin with hands, the noise is there albeit a little less. I guess, the chain tension is increasing when weight is increasing but my question is, why should there be noise at periodic intervals only? There should be a continuous noise, na?

Hi Ashis,
I guess your bike is XTREME/HUNK.
Please next time avoid Castrol 10W50 power 1 Racing. I just list down my experience with this oil in my Uni and Twister.
I have changed from 20w40 to CPR1 Racing oil 10W50 hoping for better performance and smoothness in riding. First few kilometers I felt very nice. Few days later I used to ride in 60~80 kmph range. Now the oil shows true colour. Once 1000 kms
passed, slowly engine noise increased. Day by day noise just not tolerable. After 2000 kms I took my bike to SC. They inspected and zeroed on Cam shaft bearing assembly and changed it. Then the problem rectified and I have started riding happily for another 900 kms. Then again started the same noise. Now I started to think what went wrong these days. I myself drained the 1900 kms used CPR1 Racing and poured Honda 10W30. Rode for 20kms, the typical Uni smoothness was back.
Both the bikes(Uni/Twister) shown more or less same problem.

What went wrong?
These castrol xW50 simply not flowing through the tiny oil holes of the cam shaft bearing of Hondas at high engine temperature.My friend using ELF 10W50 in his unicorn, he faced only less mileage issue and not oil circulation problem.
Hence as Sibun said Castrol and Hero/Honda engines not gel well.

I am just highlighting my troubles with this oil. Please be watchful for any symptoms as mine.

Next time use only 10W40 or 10W30 of good quality brand mineral/synthetic oil.

2day to first birth day and 6km more to 10,000 I am really happy with my CBZ, Only problem is the poor service of HMC.

last Sunday I went for a 300km ride, 70% on highway kept a speed of 70~80. Mileage I got was only 55~58 per 100rs petrol(1.4xLiter)
I used to get 66~68 on such rides. There are some climbs, in the ride, I felt power loss during those climbs and had used 1st gear instead of 2nd gear in some situation. It worried me a lot.

When I reached home, I inspected and found clutch play was too low, I then increased clutch play and adjusted AFR 1/4 rounds clockwise(Please Conform made it lean), Now mileage age shooted to 75+ per 1.4x liter(100rs)

1st H'py Birth day wishes and many more happy miles for your bike in advance .

I am also happy with my Cbz. Sure clock wise AFR is lean . 90%of my running is on Nh so usually I used to get about 170 to 184 km for rs 200 perol (2.85ltr.) averaging about 60 to 65 kms/ltr so checked the AFR turns So as to tell all and it was 1.6 (360 degree turns.)Engine smoothness was little less So I decided to make it Rich . So after complete close made (3.5 times screw driver turns of 180 degrees) or 1.75 (360 degree turns )now bike is very smooth Yet returns about 60 km/ltr.

My house is near Cochin refinery so I take from company bunk ,so purity and measure are 100%

Ok will get that changed and what is the part number for the KBX repair kit ? and who is the distributor for KBX pads sibun ? any link bai ?

And no the clutch was not opened ...the noise it is very mild ...i cant hear it inside town or in traffic ...have to take the bike on highway and i can clearly hear it very mildly...i cant say for sure if it comes from the engine head or the clutch section.

btw this is my spark plug i took it out recently what you think ? i think its running a little rich right ?

How old is the chain sprocket. Tell the number of kilometers run and i will be able to help.
I had always told in this forum that hero had moved to 10W 30 for a reason. Most think that a thinner oil is harmful but most do not think that thinner oil pumps quickly and thus is more beneficial. If you use 20W 40 or higher grade the pumping capacity of pump decreases and quicker overhauling of crank and camshaft is required.
Always use 10W 30 or 10W 40 and never go for 20W 40 or higher.

Good that you set the mixture most probably idiots at SVC enriched the mixture.Always see that bike pulls smoothly. If you are running rich your bike will feel smooth when cold but will become gruff when hot. So check the sign and decide and you could easily maintain your bike.
As i have always said extreme/hunk returns good mileage but improper tuning cause problems. My extreme is returning 55+ in city and 60+ on NH. Always check the tuning yourself and never let those idiots at SVC fiddle with it. There is no preset tuning for bikes, every bikes require different tuning. So tune according to what your bike needs.
The part no for kbx can be found here:-

To isolate the noise just take 1 foot long garden hose or pipe and place it on engine and listen and check various places on engine, much like stethoscope and you will see that you can isolate the noise to place of origin. Then report back.
You are running slightly rich, just lean the mixture by 1/4th of a turn and see the result.

A long screw driver with metal on hand grip end also works great.

@Sibun: My bike is just 5k kms old
Mostly city riding
Sane riding....no stunts

Btw when I lubricate my chain, the sound emitted is more!!! completely confused!!! And the sound while coasting is such that it will make your heart go sad.....like stones are being crushed by the chain-sprocket (at periodic intervals). And obviously, the interval decreases as the speed picks up. And strangely, this was not there ever. Developed very recently about 300 kms back.

Does clutch play actually affect mileage? :O The guys at the Hero service center had decreased the clutch play for me, it used to be half clutch as it's called I think. Had read online somewhere that half clutch is bad for the engine so left it at full clutch. But if it increases mileage in anyway, I'll take it! :P

Here's where I read that Half Clutch is not good for the engine:


And mileage of 75+, wow! That is fantastic! I'll sit and tune my bike tomorrow and try to get my bike atleast above 45kmpl. It used to give me 48kmpl at one point of time in city, but then dropped to 38-40kmpl odd after I serviced it at the authorized service center once.

Also, could someone please tell me how could 1/4th of a turn in the AFR screw make so much of a difference? I mean, it's hard to believe that 1/4th of a turn could change mileage by 17kmpl and more! If that's so, my bike has hopes of returning 55kmpl in city still. :P

@Sibun

how about using MOBIL 1 0w-40 engine oil in cbz xtreme