Announcement

**ken cool** · 01-12-2010, 09:27 PM

CBZ Help Topic Approved

**abhilashabhi12** · 01-13-2010, 10:40 PM

Originally posted by maxx View Post

Hi there Every one at XBHP. Now I am suffering with some problem I know for sure. Here are the deatils
1. My cbz does 70kmph@5000rpm with 15Front Teeth and 46 Rear Teeth.
Now the problem is here, I have driven some 3 cbz and found that even they are doing 70kmph@5000rpm with 14Front and 46 Rear Teeth. And I realized this that When I am on stock 14 Front and 46 Rear Teeth I am doing just 60kmph@5000rpm. 10kmph less than the stock.
Lately I found that there is some loss in my cbz for some reason. All engine parts are in first class. No damage at all. I have checked it by a local Mechanic@ castrol bike zone.

I am predicting that its a problem with the ignition(Cdi) of my cbz. Please suggest some ways to get me out of this probelm. The engine isnt getting the proper ignition maps & therefore there is this variation. If I am wrong please correct me.

And lastly, If I am correct and If I wanna buy a Cdi for my cbz, I dont wanna buy those stock ones. I need something different a programmable cdi from rd or something like the bbr revbox. Please post your replies cause I am in desperate need to get the cdi changed in the next 5 days.

Thanx for the approval...

Stock CBZ Does arond 65kmph @ 5k rpm, now you are doing 70kmph which is ok considering you are on 15t front sprocket.

CDI going kaput is one in a million case.. so better don't worry about it.. Try checking with stock bike again.

try checking @ what RPM does exactly your bike does 60kmph.. the stock does @ 4.5k rpm exact & 80kmph which should take 6.2 or 6.3k rpm

this should give you a fair idea..

**braindead** · 01-13-2010, 10:58 PM

your only problem seems to be a faulty speedo or tacho.

the only other explanation for the speed to rpm variation is a slipping clutch, but you say the bike is in top shape.

i wonder why you predicted the cdi is responsible for this.

**maxx** · 01-13-2010, 11:32 PM

Re:

Originally posted by abhilashabhi12 View Post

Stock CBZ Does arond 65kmph @ 5k rpm, now you are doing 70kmph which is ok considering you are on 15t front sprocket.

CDI going kaput is one in a million case.. so better don't worry about it.. Try checking with stock bike again.

try checking @ what RPM does exactly your bike does 60kmph.. the stock does @ 4.5k rpm exact & 80kmph which should take 6.2 or 6.3k rpm

this should give you a fair idea..

I really dont have any idea...Why there is so much of the difference. With what we are saying. Abhi even though if I am doing [email protected] the 15T front and 46T rear...With the stock sprocket of 14T rear I am doing 60kmph@5000 rpm. Yes, I have rechecked my stats. The stock are doing 70kmph@5000 rpm. Since I am having zma's camshaft and Oversized piston with bore 65.5...It makes lots of difference. There is extreme vibrations after 5000rpm. Which actually is making very uncomfortable ride. The vibrations seem to have been even more worse...
Abhi here is a basic idea...
In final gear, 50kmph@3000rpm
60kmph@4000rpm
70kmph@5000rpm

**maxx** · 01-13-2010, 11:38 PM

Originally posted by braindead View Post

your only problem seems to be a faulty speedo or tacho.

the only other explanation for the speed to rpm variation is a slipping clutch, but you say the bike is in top shape.

i wonder why you predicted the cdi is responsible for this.

Thanx for a more Imp question. I have replaced the clutch plates 20000kms before and its the same. Before that too it was the same. In final gear it used to do 40kmph@3000rpm. The speedo cable has been replaced recently. The tacho I guess its working precisely...But wont be able to tell about the tacho...One of my friends who actuall has a cbz old model. 2003 version with bigger outer hole on the exhaust. Has done a service of his bike, He did pick it up from a crap place where it was eating rust and did change the cdi...No other engine mods.... Hope this would explain why I am pointing on cdi...

**jd666** · 01-13-2010, 11:50 PM

Have you checked the speedometer worm gear in the front wheel for wear and tear??? and better if you compare bikes running next to a digital speedo bike, like pulsar or R15 ( keeping the digital speedo bike constant ( as in unchanged, not in speed, but bike)).

**maxx** · 01-14-2010, 11:13 AM

Originally posted by jd666 View Post

Have you checked the speedometer worm gear in the front wheel for wear and tear??? and better if you compare bikes running next to a digital speedo bike, like pulsar or R15 ( keeping the digital speedo bike constant ( as in unchanged, not in speed, but bike)).

I have already done that JD...There isn't any wear and tear. Checked with the digital speedo. Its the [email protected] recheck it again. and Post the result...

**Technician** · 01-14-2010, 03:31 PM

A stock CBZ does 65 at 5k rpm. Perfectly normal. Final gear ratio is 12.93 kmph @ 1000 rpm stock. Zero clutch slippage.

In my bike, clutch starts slipping only after 80 kmph.

Pre-April 2000 (with big hole) CBZs were rated at a top speed of 103 kmph while post April (with short hole) were tested at 109-110 kmph top speed.

So, Definitely there were minute differences in CDI, Camshaft, may be in some gaskets, exhaust with cat-con, etc. but no change in Carb, Jets.
HH/Honda does not publicise such minor differences made in a continuing bike model. But the original was rated at 32 + 5 degree advance @ 4000 rpm and above.

Count your numbers.

**maxx** · 01-14-2010, 06:55 PM

Originally posted by Technician View Post

A stock CBZ does 65 at 5k rpm. Perfectly normal. Final gear ratio is 12.93 kmph @ 1000 rpm stock. Zero clutch slippage.

In my bike, clutch starts slipping only after 80 kmph.

Pre-April 2000 (with big hole) CBZs were rated at a top speed of 103 kmph while post April (with short hole) were tested at 109-110 kmph top speed.

So, Definitely there were minute differences in CDI, Camshaft, may be in some gaskets, exhaust with cat-con, etc. but no change in Carb, Jets.
HH/Honda does not publicise such minor differences made in a continuing bike model. But the original was rated at 32 + 5 degree advance @ 4000 rpm and above.

Count your numbers.

So, what do you say..? There is some definate problem with the cdi...Or there isnt...???

**abhilashabhi12** · 01-14-2010, 08:24 PM

Originally posted by maxx View Post

I really dont have any idea...Why there is so much of the difference. With what we are saying. Abhi even though if I am doing [email protected] the 15T front and 46T rear...With the stock sprocket of 14T rear I am doing 60kmph@5000 rpm. Yes, I have rechecked my stats. The stock are doing 70kmph@5000 rpm. Since I am having zma's camshaft and Oversized piston with bore 65.5...It makes lots of difference. There is extreme vibrations after 5000rpm. Which actually is making very uncomfortable ride. The vibrations seem to have been even more worse...
Abhi here is a basic idea...
In final gear, 50kmph@3000rpm
60kmph@4000rpm
70kmph@5000rpm

Ok now Instead of scratching head.. lets get it straight.. according to me U have done Sprocketing & you have 5kmph advantage @ every 1000RPm Interval ( approx) which by any means is good.

Now what is the problem ?? Forget about what speed your friends stock bike is doing.

How can it be more vibes post 50kmph with zma's cam shafts ? if that is the case why dont you revert back to stock if possible ??

**maxx** · 01-14-2010, 10:12 PM

This is it

Originally posted by abhilashabhi12 View Post

Ok now Instead of scratching head.. lets get it straight.. according to me U have done Sprocketing & you have 5kmph advantage @ every 1000RPm Interval ( approx) which by any means is good.

Now what is the problem ?? Forget about what speed your friends stock bike is doing.

How can it be more vibes post 50kmph with zma's cam shafts ? if that is the case why dont you revert back to stock if possible ??

Cant revert back to stock...Cause I dont have the stock cam here in pune...Its back there in nashik. The straight idea is this....With sprocketing I am getting what a stock cbz is getting. And with stock sprocket's m gtting quite lower than a stock cbz. I aint havin 5kmph advantage over every 1000 rpm. Its that My bike is loosing power on some account. If i had just got to dyno my bike.Its would have been very clear since the graph would show some diffrence or variation. This is what I get from my frnds cbz which is as good as the stock. No modifications as far as engine goes. But way too heavier than my cbz.
50 kmph@3000rpm
60 kmph@4000rpm
& 70 kmph@5000rpm.

Tech:- Do you know if the stock cbz has a rev limiter or not?

**abhilashabhi12** · 01-15-2010, 12:47 PM

Originally posted by maxx View Post

Cant revert back to stock...Cause I dont have the stock cam here in pune...Its back there in nashik. The straight idea is this....With sprocketing I am getting what a stock cbz is getting. And with stock sprocket's m gtting quite lower than a stock cbz. I aint havin 5kmph advantage over every 1000 rpm. Its that My bike is loosing power on some account. If i had just got to dyno my bike.Its would have been very clear since the graph would show some diffrence or variation. This is what I get from my frnds cbz which is as good as the stock. No modifications as far as engine goes. But way too heavier than my cbz.
50 kmph@3000rpm
60 kmph@4000rpm
& 70 kmph@5000rpm.

Tech:- Do you know if the stock cbz has a rev limiter or not?

now I know what is the confusion & I tell you mate it is Impossible to get a solution for this.

me, Technician & others in this thread confirmed that we are all having approx 5kmph less @ every 1k RPM Interval when compared to your bike but you say that your friends bike does the same speed(with stock) which I think aint possible.

Only thing I would like to say is go ahead to SVC & check out with some other bikes than your friends bike.

I can 100% Say that a stock CBZ cannot do 50kmph @ 3k rpm & 60kmph @ 4k rpm it needs half a thousand RPM more.

**maxx** · 01-15-2010, 01:11 PM

Re:

Originally posted by abhilashabhi12 View Post

now I know what is the confusion & I tell you mate it is Impossible to get a solution for this.

me, Technician & others in this thread confirmed that we are all having approx 5kmph less @ every 1k RPM Interval when compared to your bike but you say that your friends bike does the same speed(with stock) which I think aint possible.

Only thing I would like to say is go ahead to SVC & check out with some other bikes than your friends bike.

I can 100% Say that a stock CBZ cannot do 50kmph @ 3k rpm & 60kmph @ 4k rpm it needs half a thousand RPM more.

I'll check it out & post the reply...

**abhilashabhi12** · 01-15-2010, 01:17 PM

Originally posted by maxx View Post

I'll check it out & post the reply...

kool & my 2 cents of advice.. do not take too much of tension in this kind of problems.. it is all Just a matter of time bro..

Give time the time, everything will be alright

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