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**Noor** · 07-01-2010, 04:51 AM

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**pioneeraron** · 07-02-2010, 09:51 PM

Originally posted by prasad_helo View Post

Need Guidance To FIX Problem with CBZ classic

Hello Bike Gurus On the board, I am a owner of CBZ classic 2003 Model. I bought it in aug09. I must admit, that buying a 28Km used bike for me was not a good deal. But after Riding her for few months i fell in love with her.

Right from the time i bought the bike, The Pickup and average was low. Also the Top speed Attained was 90Kmph. I failed to recognize this things as problematic as i was a noobee in Bikes. After Getting My feet wet in waters, I Discovered this Issues and went for fixes.On recommendations of a local Mechanic

1. I replaced Spark Plug
2. Replace Air Filter
3. Replaced The clutch Plates
4. Replaced Spoket with originals from Honda.

After this The Millage came upto 35KMPL and there was a slight Improvement in Pickup. But still the Pickup is low i feel like I am on some 100CC bike and top speed never Crosses 90KMPL.

So I need The following Info From All The CBZ GURUS

1. I stay In Pune, Which Mechanic Should i Consult
2. What Accoring to you is Problematic ?? CARB Engine or something else
3. How Much money will i have to spend if i want to Make the babe Brand new

ur engine mite need an overhaul..get valve clearance done..also called as valve grinding..start using fully synthetic oil since ur bike is old..Petronas Sprinta 5000T 10w40 Costs around 350/- here in mumbai...stop using hero honda service oil ...ITS A BIG CRAP!! before using synthetic oil get ur old engine oil flushed using a reputed flushing agent from any automobile spare parts store..also get ur carb tuned properly for pickup n avg..after all dis ur bike shud atleast manage 105kmph and a decent avg of 35-40kmpl...well cbz is very reputed for its bad mileage uve to live wid it..d max u can do is disconnect the TPFC u mite get around 2kmpl more..

hope this mite help u..and do let us know wat all uve followed..cheers!!

**prasad_helo** · 07-05-2010, 12:49 PM

okee

Thanks mate for that info, but how much will engine overhaul and Valve grinding will cost ?? Where should i get it done. How much time it takes ??

**pioneeraron** · 07-05-2010, 01:03 PM

Originally posted by prasad_helo View Post

Thanks mate for that info, but how much will engine overhaul and Valve grinding will cost ?? Where should i get it done. How much time it takes ??

Your Welcome.Engine overhaulin means all new parts.SInce u've already put new clutch plates leave that aside now.And for valve grinding it mite cost you around Rs600/- onwards depending on the mechanic u give ur bike.Unlike pulsars the cbz's head and block can only b opened after gettin d tank off and engine outta the chassis.Thats very troublesome for d mechs so they charge a lil more for cbz.I wud recommend u to b with the mechanic all day long as he does the work on ur bike.He shud show u the valves which need clearances n stuff.Take pics if necessary.Piston wud also b visible see the condition of it scrape off carbon over it using 2T oil.Disassembling and then takin valves for grinding n den assembling total time atleast 6-8hrs.

**Technician** · 07-05-2010, 04:20 PM

First of all, I doubt that it is only a 28k kms. used bike. Mine used to run 105 kmph till 55k kms. all stock. Original Dunlop would last 55-60k kms and Zapper Y easily till 35-40k kms. Guess the real kms. bike covered.

If you are going to overhaul the bike including the Head, do yourself a favour. Plonk Genuine OEM Camshaft of ZMA and new valve springs set. OEM ZMA camshaft costs 800-900 bucks. You may loose some low end but the top end would be opened up greatly.

Cheers.

**pioneeraron** · 07-05-2010, 09:22 PM

Originally posted by Technician View Post

First of all, I doubt that it is only a 28k kms. used bike. Mine used to run 105 kmph till 55k kms. all stock. Original Dunlop would last 55-60k kms and Zapper Y easily till 35-40k kms. Guess the real kms. bike covered.

If you are going to overhaul the bike including the Head, do yourself a favour. Plonk Genuine OEM Camshaft of ZMA and new valve springs set. OEM ZMA camshaft costs 800-900 bucks. You may loose some low end but the top end would be opened up greatly.

Cheers.

yup dats an nice option given by technician.But it only applies if he dusnt want to keep the bike stock!!

**abhilashabhi12** · 07-05-2010, 10:02 PM

Originally posted by Technician View Post

First of all, I doubt that it is only a 28k kms. used bike. Mine used to run 105 kmph till 55k kms. all stock. Original Dunlop would last 55-60k kms and Zapper Y easily till 35-40k kms. Guess the real kms. bike covered.

If you are going to overhaul the bike including the Head, do yourself a favour. Plonk Genuine OEM Camshaft of ZMA and new valve springs set. OEM ZMA camshaft costs 800-900 bucks. You may loose some low end but the top end would be opened up greatly.

Cheers.

Interesting..

& How much the top end Increases by doing this, I assume after this the bike feels more relaxed while cruising @ 80 or 85kmph..

But opening the engine head just for doing this is cumbersome work.

@ TS - stock CBZ can do 105kmph that's all & the max you can see on your speedo would be close to 110, dont worry CBZ doesnt have too much of speedo error

**pioneeraron** · 07-06-2010, 12:58 AM

Originally posted by abhilashabhi12 View Post

Interesting..

& How much the top end Increases by doing this, I assume after this the bike feels more relaxed while cruising @ 80 or 85kmph..

But opening the engine head just for doing this is cumbersome work.

@ TS - stock CBZ can do 105kmph that's all & the max you can see on your speedo would be close to 110, dont worry CBZ doesnt have too much of speedo error

^^ hes ryt.stock cbz well maitained cannot do more than 110-115kmph.And at these high rpm's surely the cbz is a petrol guzzler you wudnt b happy with the mileage figures either.So i guess its upto u now.
But plz let us know wt r u planning/planned. cheers!!!

**Technician** · 07-06-2010, 11:41 AM

Well, different tuning set up would result in different results. A properly maintained bike with above change should give one around 120 kmph. I and another member (Maxx) have done this change with different tunning (I had removed base gasket(0.5mm) while Maxx had reportedly shaved 0.7 mm from the head/cylinder) so this must have resulted in different CRs. I had found my bike starting like a bullet with utter torque at low revs. Right upto 8k rpm, this was unlike anything a regular CBZ. All things equal, Maxx's CBZ would have been more brutal. He claimed 120 kmph on speedo.

Anything more than this would require more compression coupled with more camshaft intake closing time and separately/singularly ignition retard and a bigger Carb.

But for a regular bike user who wishes to refresh his bike while overhauling and who wishes to keep up with modern contemporary bikes, only shifting to ZMA camshaft even without increase in CR, should help to achieve better top end.

@ TS - stock CBZ can do 105kmph that's all & the max you can see on your speedo would be close to 110, dont worry CBZ doesnt have too much of speedo error

Can you enlighten us on this issue any more.

**pioneeraron** · 07-06-2010, 01:16 PM

Originally posted by Technician View Post

Well, different tuning set up would result in different results. A properly maintained bike with above change should give one around 120 kmph. I and another member (Maxx) have done this change with different tunning (I had removed base gasket(0.5mm) while Maxx had reportedly shaved 0.7 mm from the head/cylinder) so this must have resulted in different CRs. I had found my bike starting like a bullet with utter torque at low revs. Right upto 8k rpm, this was unlike anything a regular CBZ. All things equal, Maxx's CBZ would have been more brutal. He claimed 120 kmph on speedo.

Anything more than this would require more compression coupled with more camshaft intake closing time and separately/singularly ignition retard and a bigger Carb.

But for a regular bike user who wishes to refresh his bike while overhauling and who wishes to keep up with modern contemporary bikes, only shifting to ZMA camshaft even without increase in CR, should help to achieve better top end.

Can you enlighten us on this issue any more.

yea stock cbz cannot do more than 110kmph.Heard this from many cbz'ians.SUm exceptions like 120kmph ive heard.Also heard dat cbz's speedo is very accurate.

**abhilashabhi12** · 07-06-2010, 05:49 PM

Originally posted by Technician View Post

Well, different tuning set up would result in different results. A properly maintained bike with above change should give one around 120 kmph. I and another member (Maxx) have done this change with different tunning (I had removed base gasket(0.5mm) while Maxx had reportedly shaved 0.7 mm from the head/cylinder) so this must have resulted in different CRs. I had found my bike starting like a bullet with utter torque at low revs. Right upto 8k rpm, this was unlike anything a regular CBZ. All things equal, Maxx's CBZ would have been more brutal. He claimed 120 kmph on speedo.

Anything more than this would require more compression coupled with more camshaft intake closing time and separately/singularly ignition retard and a bigger Carb.

But for a regular bike user who wishes to refresh his bike while overhauling and who wishes to keep up with modern contemporary bikes, only shifting to ZMA camshaft even without increase in CR, should help to achieve better top end.

Can you enlighten us on this issue any more.

I am more Interested in the bold part.

Coming to Top end, apart from once where I saw 132 on Speedo on Downhill my bike has never ever crossed 110 kmph on any occasion..

Afaik the real top end of Classic CBZ is 106kmph..

correct me if I am wrong..

Tried & tested wiith couple of other bikes other than mine which includes one CBZ* as well.

PS - Even with 15t sprocket @ front my bike used to die out reaching 105kmph on speedo..

**pioneeraron** · 07-07-2010, 12:20 AM

Originally posted by abhilashabhi12 View Post

I am more Interested in the bold part.

Coming to Top end, apart from once where I saw 132 on Speedo on Downhill my bike has never ever crossed 110 kmph on any occasion..

Afaik the real top end of Classic CBZ is 106kmph..

correct me if I am wrong..

Tried & tested wiith couple of other bikes other than mine which includes one CBZ* as well.

PS - Even with 15t sprocket @ front my bike used to die out reaching 105kmph on speedo..

yup agree with abhilash.cbz is a very lazy bike wen it comes to top end.
havent seen more than 110kmph on the speedo.so i think final top shud b sumwer around 105-110kmph.

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Need Guidance To FIX Problem with CBZ classic

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