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**Technician** · 06-15-2009, 11:02 AM

Only a thorough check up can diagnose the problem properly. But most likely, since you have made changes to intake as well as to cycle parts thereby making them heavier, the bike becomes hesitant in lower rpms(where the pilot jet is doing the duty). Properly get the carburetor checked and upjet both the jets to a higher size. If you don't want to mess with pilot jet (to keep the idling stock) lighten the bike's dead weight as well as the cycle parts but still increase main jet's size.

I am using Splendor's spoke rims with a 90 X 90*18 Zapper Q at rear and 3.00*18 Zapper C at front with holes mannually drilled in front disk brake to keep the cycle parts much lighter than a stock and hence a good performance.

Also, changes would be required in exhaust pipe to optimise the gains at high rpms like extracting the decibel killer while keeping some amount of back-pressure intact. Such a change would not be required for low rpm operations though.

One will have to go the extra mile to achieve the result.

**karthik_k** · 06-15-2009, 10:01 PM

so inc the jet will do??i need the stock exhaust.i like the design.so, i'l have to cut open the pipe,take out the cat con and seal it again???

**Richard** · 06-16-2009, 04:17 PM

your bike knocks at low revs because your pilot jet is either clogged(in case you havent cleaned the carb recently) or the pilot is too small..

Originally posted by kunjalsingh View Post

for vibrations just check out engine mounting rubber..here is the snap of my CBZ...i am not suffering this kind of problem however its a 2000 model.

that's a cool lookin exaust.
is it custom made?

**karthik_k** · 06-17-2009, 12:43 PM

ya i havent cleaned the carb for a long time.. wat if the pilot jet is small???

**Richard** · 06-25-2009, 01:40 AM

Originally posted by karthik_k View Post

ya i havent cleaned the carb for a long time.. wat if the pilot jet is small???

first get your carb cleaned and see if it improves...if it dosent you will have to upjet..

**karthik_k** · 07-01-2009, 11:02 PM

i cleaned my carb, still its the same

**Technician** · 07-02-2009, 12:28 PM

i get engine knocks wen startin from rest in 2nd gear.

2nd gear is not for starting from the rest, are they?

Try using the stock air filter and see what happens.

**karthik_k** · 07-05-2009, 12:47 PM

from rest i mean releasing clutch on the move.when reducing gears according to speed, at 20kmph i ride in 2nd gear,that time i experience knocks

**Technician** · 07-07-2009, 02:08 PM

Try tightening in (clockwise) the fuel/air screw which is located under the Carb in the front side, near the cylider area. As this would reduce air and thereby richen the mixture, the engine would slow to compensate. Then try adjusting the idle screw on the side to adjust according to the changes. The bog may just disappear. This PD 22 Carb is generally meant for 80/100 cc but in India is used for our 156 cc engine. So go and tighten to 5 degree less than the maximum tightened state. Tell us your experience.

In this image, the Carb is bolted to a 100 cc engine. So it is not my bike.

**karthik_k** · 07-15-2009, 09:34 PM

my air screw is jammed dude.gotta fix it soon.i'l keep u posted

**invinciblef** · 08-17-2009, 06:36 PM

Ahmm...mm..m......!

Well Hello !

I must be a Jerk, to speak among such a big personals.

Anyway, Kartik why don't you get your Engine serviced ! As it had already Clocked 56ks+ inspite of all these fuzz & drama.

Well I too have Installed K&N, a NGK Platinum SP, Cable, etc. etc., But I haven't faced any of such problems till yet .

My CBZ is religiously Great & Revs up to the 11K mark effortlessly!

KNOCKING - The CBZ had one major problem with it, i.e. its Tapid + Timing Chain which is the only got damm thing in this whole Bike ! This is the Thing one should look after cautiously. Get it replaced it will cost you around Rs.1700 INR.

Attaching some of my Bike's pics, Check them out !

Page not found - xBhp.com

http://www.xbhp.com/talkies/members/invinciblef-albums-cbz-truly-invincible-picture2119-cbz4.jpg

Keep trying Buddy !

Regards

C ya

**Technician** · 08-24-2009, 03:44 PM

Try tightening in (clockwise) the fuel/air screw which is located under the Carb in the front side, near the cylider area. As this would reduce air and thereby richen the mixture, the engine would slow to compensate. Then try adjusting the idle screw on the side to adjust according to the changes. The bog may just disappear.

One update and clarification. Got some info. recently. The position of air-fuel screw is also important. (i) If it is located on the inlet side of the Carburetor, it regulates the air; thus clockwise tightening in would reduce air making the mixture rich and vice versa. (ii) If the Screw is located on the outlet side of Carburetor near engine head, the closewise tightening in would reduce the fuel flow thus making the mixture lean and vice versa.

In CBZ carb, the screw is located on the outlet side of the carb, therefore, the second theory would apply. I Learnt the difference after many hardships myself.

Sorry, for any inconvenience.

**misterio** · 09-05-2009, 01:58 AM

@Technician, The Carb in the CBZ classic has a plastic roller. It connects the second end of the Accelarator cable. It was broken by mech and im unable to source it. Can you let me know if it makes a difference,i guess it does else it would'nt have been there.

I would like to know if any tweaks are possible,or any CBZ owners in HYD can help me source it?

**Technician** · 09-07-2009, 02:13 PM

The Carb in the CBZ classic has a plastic roller. It connects the second end of the Accelarator cable. It was broken by mech and im unable to source it. Can you let me know if it makes a difference,i guess it does else it would'nt have been there.

I presume you are referring to TPFC roller. Do you yourself sense any difference? If not, then enjoy.

The maximum you can stretch the CBZ to 120 kmph or so, that too with all kinds of tuning(like filters, exhaust, modified camshaft, jetting, lightening of body and cycle parts), without compromising street-rideability. With more exotic parts like big bore, storker units, parts of other bikes available in India or abroad, and with unlimited budget, there is no limit.

**maxx** · 09-08-2009, 04:11 AM

Originally posted by Technician View Post

I presume you are referring to TPFC roller. Do you yourself sense any difference? If not, then enjoy.

The maximum you can stretch the CBZ to 120 kmph or so, that too with all kinds of tuning(like filters, exhaust, modified camshaft, jetting, lightening of body and cycle parts), without compromising street-rideability. With more exotic parts like big bore, storker units, parts of other bikes available in India or abroad, and with unlimited budget, there is no limit.

Well technician, u were speaking about CAM SHAFT vl cud u plz suggest, what can be done 2 the cam shaft of the cbz 2 get da maxxed performace. Recently, i have fitted a ngk iriddium 9 n changed the clutch wire n found the bike 2 rev easily n an outrageous acceleration. Found da bike difficult 2 control after doing dese mods, wid leaving tire marks everywhere on da road. What can be done 2 increase stability n handling? Shall i increase the wheel base? Just tell me what can be done, till da tym i dont get sumthing done i'll hav 2 drive very slow n very cautiously!

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