Re: CBZ xtreme / Hunk

Have you tried running on reserve only i.e. the time you hit reserve till last drop until tank gets dry? How much kms you ran? As per my personel experience i did max 85 kms. so considering average as 45 kmpl tank reserve capcity comes 1.88 ltrs. For your said capacity (1.25 ltrs reserve) it will show average of 68 kmpl (Which is impossible in my case as i have neither received that no. till date even after riding in 45-55 kmph nor ridden bike to get maximum mileage after bike is in reserve)

Re: CBZ xtreme / Hunk


I got it for 35k. And again need your valuable advise. Had some small works like wheel bearing replacement, gear tensioner change etc to be done and now it's running good. I have been using it since a week and now suddenly started feeling severe back pain and in the spine. Is there something wrong with the bike or is it normal during the starting. ( FYI I moved from discover 125st). Thanks in advance!

Re: CBZ xtreme / Hunk

Check for suspension stiffness, Handle alignment, fork alignment. Adjust your riding posture and find a comfortable position

Re: CBZ xtreme / Hunk

I'm not able to upload my next post regarding the valve job, due to server error

Re: CBZ xtreme / Hunk

Thanks. I got it checked at the service centre and it seems the shock absorbers have gotten little weak. But I have a feeling that's not the actual reason. They have advised to get them replaced for 4000 rupees a pair. It's costly and I think I don't have a choice but to commute to work using public transport till month end. ☹

Re: CBZ xtreme / Hunk

Any clue guys?

Re: CBZ xtreme / Hunk

The riding posture of Xtreme is different from that of D125. You may need to get used to the rear-set foot pegs and overall riding position, I believe.
Also, check if the handle position is changed from the stock position. Compare with another XTreme on this.
If shock-absorbers are weak, get them replaced. I think your bike has covered 50k kms; it is good time to replace the shocks.
Also, it is better if you can have the front fork oil changed, if it is not done in the past, say 20k kms.

HUNK valve clearance and oil screen filter / centrifugal filter ?

hey guys. i have a hunk 2007 model. from last six month i am only using it for long 400 km/day rides . in these six months i ride about 8000 km. i also started servicing my bike myself. now i can change oil, chain adjustment , maintain battery water level , clean filter and clean bike by myself. only thing which keep bothering me is VALVE CLEARANCE and OIL SCREEN FILTER / CENTRIFUGAL FILTER. once i asked service guys about centrifugal filter , they say "there is no need to clean it" and i never see them adjusting valves from a long time.my bike has completed 19000 km and just working fine without any trouble. i have these questions -

1-do i really need to clean those filters and adjust valves?
2-have you guys ever done these two things ?
3-how do i know that valves clearance is needed ?
4-if i have to do this stuff what should i tell those service guys to convince them or should i look for some other mechanic ?
5-do i have to buy my own feeler gauge to check the perfect clearance?

hope you guys can help me

Re: CBZ xtreme / Hunk

@ sibun Got zapper zoom for the front and zapper q (after lot of running around) for the back . I forgot to tell you its run 110000 + kms...it could be even more i really cant say for sure... with one bore changed....my mechanic says its emitting slight smoke and if it starts drinking oil more he insists on rebore with a oversized USHA piston....is this advisable ? since it run so many miles should i give it to SC for whole engine work which would cost a bomb ?

Not even 500 kms since my vlave change i noticed my bike was emitting blue smoke yesterday on my trip to chennai...also i saw what looked like oil seeping out from spark plug...on returning i took out the sparkplug only to see what smelled like petrol but it looked like oil...the oil seal gone kaput this soon .

Re: HUNK valve clearance and oil screen filter / centrifugal filter ?

Let me answer one by one .

1. Absolutely !! [MENTION=40365]ashwin.terminator[/MENTION] and [MENTION=64235]Jith_in[/MENTION] cleaned their filters and to their shock it was filled with fine metal shavings and grime. Valve clearance in hunk/xtreme is of utmost importance. Needs correct clearance every 5-6k kms.

2.Yes some of us have cleaned filter,while almost everyone has adjusted valve clearance ( typical for xtreme user )

3. After riding 5-8 kms , at idle listen to engine note , it willl either be silent or make tik tik noise increasing with revs .

no noise - tight clearance ( very bad )
slight noise - Perfect
high noise - high clearance ( bad )

4. If you ask anyone here , everyone will say do it yourself . This requires precision and care which no ASS guy will have for sure. mechanics generally do these but without an important tool - Feeler gauge.

5. Absolutely , Feeler gauge has strips of metal of specified thickness, you need to have this if you own a hunk/cbz .

Re: HUNK valve clearance and oil screen filter / centrifugal filter ?


thanks for the reply.

after reading your reply i think i should do it by myself. can you plz tell me in detail what tools and of what size i needed for this task. after draining all the engine oil can i use it again after filter cleaning. plz write detailed instruction for removing fuel tank and clutch cable.any advice will be of great of help.

i am doing this for first time so i think i should go to a mechanic and learned from him and then do it myself next time . what's your advice ? is this job is tough or i am just worrying too much?

Re: CBZ xtreme / Hunk

What will happen if i use for example: cb triggers cdi on my hunk? Anybody has any idea?

Re: CBZ xtreme / Hunk

Rohit has in excellent way made it understand. Still adding here:-

1. Absolutely you need to clean the filter. Ashwin damaged his head and pump with debris in oil strainer. And adjusting valves is first priority.
2. Always.
3. From power delivery and mileage. MIleage will decrease and the punch after 6k rpm will be missed if tappets are tight. If loose then loud noise.
4. No SVC. You own. Else if you have got a mechanic like me.
5. Yeah a feeler gauge is a must have tool.

Blue smoke can be also due to worn out valve oil seals. No only changing valves and oil seals. Look at the valve guides. They might be worn out.

If they are worn out then you can't stop oil flow by oil seal change. Have to change the valve guide.

While opening head you can know if bore is leaking oil. If the sides of piston have no carbon deposit and is oily then its the bore.

If the piston is oily and whole piston is full of carbon its the valve oil seal.

No need of opening full engine if their is no crank play and also engine bearing problem.

Mechanic is right of re-boring and USHA piston.
But take care that re-boring is done on a boring machine rather than turning machine as most lathe practice.

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

misfiring, power loss and may be not start at all.

Re: CBZ xtreme / Hunk

Thanks sibun for the detailed reply...i took the bike to my mechanic and he says he put little bit of oil in the sparkplug thread so as to make the opening easier next time...and that was the oil that was seeping out a little bit on engine heating...he said if the oil seal is gone then i wont have this much compression in my kicker...and i have very good compression...infact the kicker is hard to kick and its never been this hard since i bought it and earlier i have done the same head job twice through hero ASC ...even then the compression was not like this...and the bike flies like anything...reaches triple digit speeds easy and i dont even have to give full throttle....my mechanic wont change parts even if i tell him to ...he will try to fix it only then if i am not satisfied he will change the part...for example my bike fell and i broke the front shield...so i told him to change it but he just used quick fix to fix it...saved me Rs 200... totally trust worthy guy...i even told him to rebore to usha piston and he says no need now just run it for some more.

Also there is absolutely no noise from the engine...it feels like electric bike....may be the tappets are too tight ? as i have not set the tappets in a really long time...i have no idea how my bike has become so silent after the head job...will keep an eye on the oil level. And i will have to check the boring machine...maybe i will take a snap of it to confirm that it is not a turning machine...i wont be able to tell the diff. anyway lol.

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

Re: CBZ xtreme / Hunk

Actually thinking of switching CDI with Xtreme's CDI. WIll there be any change?
I feel that hunks top end is restricted with existing CDI. you see stock hunk achieves only 11kmph within 8-9k rpm, 10kmph only with 15t sprocket within 8-9k rpm.

My review on 15T sprocket on Hero Hunk 2014:
Bike loses initial torque, feels like riding an Unicorn below 6k RPM. But engine feels very relaxed and less stressed.
Mileage increases by 2-3kmpl.
The biggest improvement is the speed per rpm:
4k rpm: mod: 51kmph stock: 49kmph
5k rpm: mod: 65kmph stock: 60kmph
6k rpm: mod: 78kmph stock: 74kmph
7k rpm: mod: 93kmph stock: 85kmph
8k rpm: mod: 106kmph stock: 100kmph
9k rpm: mod: 116kmph stock: 111kmph
Anyway my stock hunk revs till 9400rpm but with 15t sprocket it revs till 9K rpm.

So 15T sprocket is great for touring.

Best thing: Acceleration after 6k rpm is ballistic and easily out accelerates CBZ xtreme 2009 version. I tested it several times with my friend in empty highway with a 25000kms running CBZ Xtreme (analogue meter). Cbz xtreme is ahead uptill 80kmph but after that hunk accelerates till 114kmph very very fast and overtakes cbzX very easily. That cbzX was at around 9k rpm speedo showing 122kmph (speedo error ofcourse). But i must say the acceleration with 15t sprocket after 6k rpm is lot better (even with pillion) compared to stock hunk.
From me strongly recommended for Hunk users.