World of Sprockets!

[Shreeni0403]

Direct Fits:

Apache RTR 160: Stock Setup: 13/44 teeth.

To overgear it, use the 14 teeth front sprocket from Yamaha YZF R15/ Fiero F2. (Thanks Aparajith)

Pulsar 220 DTS Fi (Old model): Stock setup: 14/37

To undergear it, use:
P200's rear sprocket, 38 teeth,
Karizma's rear sprocket, 40 teeth, (Thanks Prafultripathy)

Yamaha YZF R15: Stock Setup: 14/42

To overgear it, use rear sprocket, 40 teeth from Yamaha FZ 16. (Thanks anirudh_fz1)

Yamaha FZ16: Stock Setup: 14/40

To overgear it, use front sprocket, 15 teeth from Honda Unicorn. (Thanks iamvik)
To undergear it, use rear sprocket, 40 teeth from Yamaha YZF R15. (Thanks anirudh_fz1) - Stock is also 40 so this wont hold good.

Honda Shine 125: Stock Setup: 14/~

To overgear it, use front sprocket, 15 teeth from Honda Unicorn. But, you'll have to shave off the sides of the sprocket so it matches the chain. (Bike India)


EDIT: This topic's incomplete. More material would be added on later. Please suggest improvements to the topic.
-Samarth

Honda Unicorn 1st and 2nd Gen : Stock Setup: 15/42
Honda Unicorn 3rd/4th onwards : Stock Setup: 15/43

Direct Fits -
With Chain pitch 428 (Unicorn Chain)
Front 14T from Hero Honda Ambition/CBZ/Xtreme
Rear 38T (Ambition)
Rear 46T (CBZ Classic)

With Chain Pitch 520 (Karizma chain)
13T/40T of Karizma
13T(ZMA)/38T(P200)

Hero Honda Karizma : Stock 13/40
Rear 38T of P200 (P200 chain length is not sufficient)

[Samarth 619]

Honda Unicorn 1st and 2nd Gen : Stock Setup: 15/42
Honda Unicorn 3rd/4th onwards : Stock Setup: 15/43

Direct Fits -
With Chain pitch 428 (Unicorn Chain)
Front 14T from Hero Honda Ambition/CBZ/Xtreme
Rear 38T (Ambition)
Rear 46T (CBZ Classic)

With Chain Pitch 520 (Karizma chain)
13T/40T of Karizma
13T(ZMA)/38T(P200)

Hero Honda Karizma : Stock 13/40
Rear 38T of P200 (P200 chain length is not sufficient)

Thanks Shreeni for the inputs. Very much appreciated! I have edited the 1st post.

About that "40 teeth r15 rear" that you showed in red text, it was a mis print on my part. R15 has 42 teeth rear, so the upgearing info holds, and the mis print is corrected...

Secondly, please clarify what chain pitch does stock Unicorn use? Both 1st/2nd generation and 3rd/4th generation.
A lot of people are confused about this.

Thirdly, can you please clarify that if (P200 chain length is not sufficient), can we use the stock zma chain?

[Shreeni0403]

Thanks Shreeni for the inputs. Very much appreciated! I have edited the 1st post.

About that "40 teeth r15 rear" that you showed in red text, it was a mis print on my part. R15 has 42 teeth rear, so the upgearing info holds, and the mis print is corrected...

Secondly, please clarify what chain pitch does stock Unicorn use? Both 1st/2nd generation and 3rd/4th generation.
A lot of people are confused about this.

Thirdly, can you please clarify that if (P200 chain length is not sufficient), can we use the stock zma chain?

Unicorn chain is 428 pitch and length is also same for all 4 gens.

P200 chain length is not sufficient for the ZMA.
I am not sure for the Unicorn

[Parth]

I was planning to change the gearing of my r15. Its run about 3500kms, so the chain and both the sprockets are fairly new. I wish to get more top speed from her, and I'm ok with a little drop in acceleration as I have frequent highway runs.

I've heard that changing the sprocket with 1 which has lesser no. of teeth is not good, although one may change to a sprocket which has a higher no. of teeth. Is this true?? I mean is there any advantages of increasing the no. of teeth of a sprocket as compared to reducing them?

[Shreeni0403]

I was planning to change the gearing of my r15. Its run about 3500kms, so the chain and both the sprockets are fairly new. I wish to get more top speed from her, and I'm ok with a little drop in acceleration as I have frequent highway runs.

I've heard that changing the sprocket with 1 which has lesser no. of teeth is not good, although one may change to a sprocket which has a higher no. of teeth. Is this true?? I mean is there any advantages of increasing the no. of teeth of a sprocket as compared to reducing them?

Based on the quoted info below, Unicorn front sprocket is straight fit to FZ. You can try the same for R15 if FZ and R15 front are the same. Max of 100rs.

Yamaha YZF R15: Stock Setup: 14/42

To overgear it, use rear sprocket, 40 teeth from Yamaha FZ 16. (Thanks anirudh_fz1)

Yamaha FZ16: Stock Setup: 14/40

To overgear it, use front sprocket, 15 teeth from Honda Unicorn. (Thanks iamvik)
To undergear it, use rear sprocket, 42 teeth from Yamaha YZF R15. (Thanks anirudh_fz1)

[Parth]

Based on the quoted info below, Unicorn front sprocket is straight fit to FZ. You can try the same for R15 if FZ and R15 front are the same. Max of 100rs.

Yeah i too noticed that. Also, the cost of Rs100 is pleasant as I was expecting upwards of rs250 atleast.

I wanted to clear some of my doubts about sprocketing.

1. My bike comes with 14-42 stock setup, hence the chain would be made for this particular setup (I'm referring to the no. of links / length of the chain). Now since I'm altering the sprockets, would it have any adverse effects of the chain? I really don't want a busted chain on my new bike.

2. My bike uses o-ring chain. I dont think that the unicorn uses an O-ring type chain. Would this cause any problems for the chain / sprocket?

3. Can the authorised svc void the warranty on my bike if i change my front sprocket?? If yes, then which parts' warranty shall get void because of changed sprockets??

4. This is not a sprocket related question but still :
I've had to tighten my chain once as it got loose while running. this tightening was done at yamaha authorised svc only and the mech shifted a part on the end of the swing arm which was connected to the chain/sprocket and it had indentations which allowed it to get stuck to a metallic kink on the swingarm.
My question is : Why does the chain get loose after running a certain number of kms? It is made of metal and is certainly not stretchable.....so how and why does it get loose ??

5. Another theoretical question: My friend had to replace his entire chain on his R15 after around 30-40k kms, as it had become loose and there was no more room for it to be tightened. Now since the chain had become loose or in other words had gained in length, would using bigger sprockets enable the use of the same loosened chain again?

[Shreeni0403]

Yeah i too noticed that. Also, the cost of Rs100 is pleasant as I was expecting upwards of rs250 atleast.

I wanted to clear some of my doubts about sprocketing.

1. My bike comes with 14-42 stock setup, hence the chain would be made for this particular setup (I'm referring to the no. of links / length of the chain). Now since I'm altering the sprockets, would it have any adverse effects of the chain? I really don't want a busted chain on my new bike.
+/- 1 teeth wont require any mod with chain !!

2. My bike uses o-ring chain. I dont think that the unicorn uses an O-ring type chain. Would this cause any problems for the chain / sprocket?
No issues AFAIK

3. Can the authorised svc void the warranty on my bike if i change my front sprocket?? If yes, then which parts' warranty shall get void because of changed sprockets??
AFAIK they won't void warranty but I don't recommend you to do this mod in this early stage.

4. This is not a sprocket related question but still :
I've had to tighten my chain once as it got loose while running. this tightening was done at yamaha authorised svc only and the mech shifted a part on the end of the swing arm which was connected to the chain/sprocket and it had indentations which allowed it to get stuck to a metallic kink on the swingarm.
My question is : Why does the chain get loose after running a certain number of kms? It is made of metal and is certainly not stretchable.....so how and why does it get loose ??
Why does engine parts spoil ? Its a metal, right ? Its wear n tear part. And metals do stretch at heat. Moreover chain is not 1 single piece of metal, there are lot of joints which can wear out and hence create the expansion.

5. Another theoretical question: My friend had to replace his entire chain on his R15 after around 30-40k kms, as it had become loose and there was no more room for it to be tightened. Now since the chain had become loose or in other words had gained in length, would using bigger sprockets enable the use of the same loosened chain again?
NO. Thats the life span of chain. And why would you want to spend on bigger rear sprocket , in that case cutting a chain link will also solve your problem

Answers in bold to my knowledge !!

[Parth]

Answers in bold to my knowledge !!

Thanks for the replies, specially to question 4 and 5

[pabi]

guys i am in need of making my p150 ug3 gears taller for top end speed. I think stock setup is 15/44 , bike is 25K [2 yrs ] old in stock setup.

1) Should i go for a whole new setup or just the front sprocket change?

2) Which bikes sprocket set is a direct fit for tall gearing?

3) i approched many mechs : local, castrol bike and bajaj service guys and these grease monkeys dont understand what i am asking for , they simply say u cannot do that, its impossilble and all the stuff, suggest me a good mech in HYD for this.

[Samarth 619]

guys i am in need of making my p150 ug3 gears taller for top end speed. I think stock setup is 15/44 , bike is 25K [2 yrs ] old in stock setup.

1) Should i go for a whole new setup or just the front sprocket change?

2) Which bikes sprocket set is a direct fit for tall gearing?

3) i approched many mechs : local, castrol bike and bajaj service guys and these grease monkeys dont understand what i am asking for , they simply say u cannot do that, its impossilble and all the stuff, suggest me a good mech in HYD for this.

1. Front Sprocket? Very rare bikes have 16 teeth front, ok? Maybe Rx135 has it, but it won't fit.

2. P180 UG3's sprocket set, which is 15/43 is direct fit, but one teeth will hardly give you a difference.

Also, check all generations of Pulsar. If any one gen. has a 42 teeth, but with 4 holes, it might fit.
Older Pulsars mostly had 6 holes, which won't fit.

Also, I strongly think that, the 42 teeth rear of Discover 125 (after March 2006) might fit... can't guarantee though.

Try going into showrooms and try old sprockets to decide which ones fit. Old ones are lying around for free...

3. Only Hyderabad users can help about this. I'm not from there, so sorry.