sprocketing

[Andy-)]

hey guys i wanna increase the cruising abilities of my cbz xtreme and increase the top end so I thought id do some sprocketing well i have two options
opt 1 take the chain sprocket kit from my bros zma(lying unused for for the past 6 mts since he has gone abroad) or
option 2 manually reduce the number of sprocket teeth through welding

the reason i plan on doing this is that the xtreme can red line quite easily in 5th and and does around 115-118(speedo) at around 9000rpm redline and can go on to touch 125 tops at around 9500+ rpm hence if I put the zmas sprocket i can do around 115-118 at around 8000 rpm and be able to touch around 130 before it redlines the cbz xtreme being more rev friendly unlike the zma which looses massive amounts of power after 7500 rpm I hope a little tall gearing would not be hazzardous and more beneficial during long tours with lesser strain on the engine I would like some gyaan from some experts before carrying out this mod..

Btw does any one know the front and rear sprocket sizes of the xtreme???

[Aryan]

Query Approved.

[Samarth 619]

I had Rear-sprocketed my P180 earlier this year (40 teeth). Reason: My college was on Jaipur Road (highway) ... Now, it's back in City. So, I got stock sprocket (43 teeth) back...

See, on highways it became fun to ride it. Vibrations reduced a bit & I actually got 52 kmpl constant!
Once I had to submit a project in college & I was running late. Ripped it! Got some 131 on speedo... don't remember @ what rpm...

But, when my college was changed, I found that dragging the higher ratio became tough, unless I rip & live closer to redline most of time. Cities are very crowded areas. Sometime, I had to drive at 3kmph (1st gear, Clutch half pressed, no accel.) ... Terrible! And this happened when I was only 3 teeth short...

So, take my word & go for it. You would love the change, unless driving in crowded areas. Even in cities, it won;t be much problem. But don't extend beyond (-)4 teeth if a little low speed driving is a matter.

-->
Coming to your question, Don't weld the sprocket at all. Reg. using ZMA's sprocket, don't take it from a used bike. Instead go to HH Showroom, and get a new ZMA Sprocket + a "Rolon" Chain ... & later Always replace chain & sprocket together.

I don't know ZMA & CBZX Sprocket sizes. P180 however, has 43 teeth with 4 bolt holes on it. But, avoid changing more than (-)5 teeth from Stock... Good luck!

[Andy-)]

Thanks for your reply
but does any one know about the sprocket sizes of the xtreme
I know that the zma has a 13T front and 42T rear but does any one know about the xtreme's sprocket??

ne way the reason that I want to inter change the chain sprockets of both bikes is that the zma has really tall gearing and the engine is almost hopeless after 7k+ rpm cause the zma's engine is not a rev happy one hence I thought that the cbz xtremes chain sprocket is quite short geared will help in improoving the the acceleration through out the rev range and will be cost effective too.

[c_sbk]

front is 14T and rear is 43T.fitting zma sprocket will give u better acceleration but lower top end 100-110 kph.zma sprocket is not suitable for ur requirement.

[steveburnside2001]

hey guys i wanna increase the cruising abilities of my cbz xtreme and increase the top end so I thought id do some sprocketing well i have two options
opt 1 take the chain sprocket kit from my bros zma(lying unused for for the past 6 mts since he has gone abroad) or
option 2 manually reduce the number of sprocket teeth through welding

the reason i plan on doing this is that the xtreme can red line quite easily in 5th and and does around 115-118(speedo) at around 9000rpm redline and can go on to touch 125 tops at around 9500+ rpm hence if I put the zmas sprocket i can do around 115-118 at around 8000 rpm and be able to touch around 130 before it redlines the cbz xtreme being more rev friendly unlike the zma which looses massive amounts of power after 7500 rpm I hope a little tall gearing would not be hazzardous and more beneficial during long tours with lesser strain on the engine I would like some gyaan from some experts before carrying out this mod..

Btw does any one know the front and rear sprocket sizes of the xtreme???

Hi regarding your query...decrease the rear sprocket by 2 teeth, anything more you will loose on top end as the 150 cc mill will not have the torque to take it to 8000+ rpm and city riding would be a pain....Not sure about the extreme's size.

The zma has a 40 rear and not a 42 and the 180 v2, ug3 have a 44 rear not a 43
the v1 180 has a 42 rear.

[c_sbk]

the 180 v2, ug3 have a 44 rear not a 43

some 180 dtsi v2,17 " alloys also come in 43T at rear at that time but when black paint 180 is introduced 44T at rear is common fitment,cos mine also at the rear sprocket is 43T.but now there is none 43T sprocket available.

[me is rossi]

just gt a brand new chain-sprocket set,but just sprocketing can stress ur engine, u need to make corresponding changes in the engine for optimum results.higher the number of teeth, higher top-end; and lower the number of teeth u compromise the low-end torque, but tend to get a better top-end.

[c_sbk]

wut abt the Sproketing of ZMA for better top speed.?

i think zma's top speed is good enough and no need of sprocketing unless ur zma is highly modified and producing much power then stock bike.If u do sprocketing in zma for top speed,ur bikes lower end is too weak and u will have to rev hard to pull ur bike in city traffic.

[psycho 98]

Does sprocketing causes any side effects to the crank, asking coz i heard it will, can anybody confirm !

[Praful]

Does sprocketing causes any side effects to the crank, asking coz i heard it will, can anybody confirm !

A certain 220 I know was running the ZMA's 40T rear sprocket, instead of the 37T stock rear sprocket. The dude landed up with a bent crank and a few more things....

[psycho 98]

A certain 220 I know was running the ZMA's 40T rear sprocket, instead of the 37T stock rear sprocket. The dude landed up with a bent crank and a few more things....

Oh i see thanks for conforming, my condolcences to that owner.

[Samarth 619]

just gt a brand new chain-sprocket set,but just sprocketing can stress ur engine, u need to make corresponding changes in the engine for optimum results.higher the number of teeth, higher top-end; and lower the number of teeth u compromise the low-end torque, but tend to get a better top-end.

But, the stress on engine is as much as driving in higher gear. I mean by this way, even a normal bike can be stressed. Drive a Pulsar in 5th @ 10 kmph - it will be stressed. right?

I think it won't be stressed provided you're in right gear/ rpm ... I had 3 teeth short, nothing happened!

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@ Praful: EDIT: Ok, doubt confirmed ... 37 teeth is it!

[Praful]

@ Praful: Bro, Are you sure that P220 has 37 rear teeth? I heard 33 from this forum only somewhere ...

Please fish out that post where its mentioned as 33T for the rear on the 220.

I want to know who's propagating such misinformation!

Its 37T, I've personally counted it...

[Andy-)]

A certain 220 I know was running the ZMA's 40T rear sprocket, instead of the 37T stock rear sprocket. The dude landed up with a bent crank and a few more things....

the reason for that may have been because the 40T of the zma was more appropriate for the 18" rims of the zma how ever the 220 I think runs on 17" any way i think ill carry on with the sprocket swap next week see how the bike handles the change, in case I notice any signs of problems Ill switch them back..hope nothing goes wrong.