[MENTION=24386]Samarth[/MENTION]

Hello

I own a Fazer V2.0. I am planning to slightly overgear it for better highway punch with lesser engine stress.

Background Research : fzv2.0 - 14 / 41 Sprockets

Available options : Either Unicorn's 15T at front (or) Fz v1's 40T at rear.

Which one is better and will fetch more results ??

My knowledge ways changing the front one should return more results as its RPM is much more than the rear one, there by multiplying the results.

Please Suggest.

Yes, the 15 teeth will result in more taller gearing than the 40T. Please do check if it fits though, from the first post of this thread.

Thanks.

Will I be experiencing difficulty in climbing hills or having a heavy pillion etc?

Any members have tried this before me on an Fz v2.0 or a Fazer fi ??

Sprocketing only decides rear wheel rpm with respect to engine rpm. You will be fine as long as you are riding in the torque-power range of the engine..

How do i know if the chain and sprocket has worn off and whether they need a change?
And how does changing a worn off chain and sprocket affects the bikes performance or rather how does using a worn off chain and sprocket damages a bike ? @Samarth 619

First check if the NS 6-hole 39T sprocket suits. Using P220's 36T is not recommended. Reducing from 43T to 36T is too much. After I reduced from 39 to 36, I now have the engine at 5000rpm @ 75kmph in 6th gear. Very relaxed cruising.

I have the 39T from Pulsar UG4 and i like the ride now.The pickup and ingear acceleration certainly not as maniacal as the original setup,but its no slouch either.You still should be able to pull ahead of the other bikes in the segment due to slightly lengthier gearing post the 39 set up.Highway riding is the major plus of this set up.Cruising at 110-120kmph is now a breeze with a relaxed engine.

But i feel 40T(ZMA) is the best setup without compromising on the core characteristic of the D200.I still love the 39T.

Gearing is a measure of all the components that determine the rate at which an engine's crankshaft's revolutions are transmitted, into the vehicle's speed. It comes from the word "gears" which are rotating cogs, which decide what speed the machine picks up, at a particular rpm.
Secondary gearing is related to front and rear sprockets of a motorcycle. Primary gearing is related to the internal gears, related to the gearbox.



A Sample photo of the rear & front sprockets, of my bike (Pulsar 180 UG3) is given below:





So, you can see above how the engine carries the power to rear wheel, via both the sprockets and chain.


Sprocketing, in general sense, means changing the front & rear sprocket sizes to affect gearing. It's one of the simplest and easiest mods. The basic info says that:-->

1. Bigger rear sprocket or smaller front sprocket, results in gearing biased towards acceleration, with some lag in top speed.
2. Smaller rear sprocket or bigger front sprocket, results in gearing biased towards top speed, with some lag in acceleration.

Gearing does NOT result in more or less power. It only affects how the power is laid, by changing the balance between top speed and acceleration. So, if one wants more top speed, and is prepared to lose acceleration a bit, or vice versa, then sprocketing is advisable.

Taller gearing results in better highway mileage, and short gearing results in less highway mileage. This is due to the fact, that in longer gearing, the machine travels longer distance for a particular engine speed (rpm), and vice versa.

Gearing maybe affected by: Sprockets' size change, rear tyre's size change, gearbox modification, clutch drag, etc.
Gearing is NOT affected by: Weight/ load change (pillion, etc.), front tyre change, free flow air filters/ power mods, etc.

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Change Measurement: Final Gearing Value: The sizes of front and rear sprocket (measured in "no. of teeth" the sprockets have) determines the final gearing.
It is calculated by Rear Sprocket Teeth divided by Front sprocket Teeth. Like Pulsar 180 UG4 has a 14 front and 39 rear setup. So, its stock final gearing is 39/14 which is equal to 2.786.

Final gearing is for comparison between different sprocket combinations, this way:

45/15= 3.000 (Let's call this "Setup X")
44/14= 3.143 (Under gearing, compared to "Setup X", means more acceleration)
39/14= 2.786 (Over gearing, compared to "Setup X", means more top speed)

Higher Final Gearing value signifies moving gearing towards acceleration (short gearing), and vice versa. So, when changing both sprockets from stock, the new gearing value should be calculated to determine which way you're going with gearing.

But if you overgear too much, you might need a very long stretch to achieve a good top speed, or you might not achieve it at all. So, for a stock bike, a gearing change should be within 10% at maximum, that's it!

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Rear Tyres size change affect Gearing: Rear Tyre change (size) may affect overall gearing, if the profile (height) is affected due to this change. A higher profile increases gearing, while a lower profile decreases it.
A tyre with size 120/70 has a normal height of (120mm x 70%) which is 84mm. But, the broadness of the tyre rim can change the "final height".

A broader rim gives less tyre height, as tyre is rubber, and it expands over the broader rim, causing lesser ride height & lower gearing. And of course, vice versa too. For example, if you fit the R15 rear tyre on your Pulsars, you might not change gearing at all, because although the R15 tyre is of lower height, but the Pulsar rim is narrower than R15's, and a narrow rim raises the ride height.

Front tyre size change doesn't affect gearing, although it may contribute to a different ride height, weight and different speeds on the speedometer.


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Direct Sprocket Fits:

Remember that your stock chain can be successfully adjusted for upto 2-3 teeth changes in sprockets. Beyond that, you may or may not require a new chain OR you may be required to remove some links from the chain. For the sake of pillion travel, the chain play should be adequate. After re-installing the chain, move the bottom portion of chain upwards, it should go upto 10-15mm only, not more or less than this.
Remember that you might need to purchase the whole kit instead of just the sprocket depending on where you purchase it from. These sprocket combinations are direct fits to the mentioned bikes:

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

To overgear RTR 160, use the 14 teeth front sprocket from Yamaha YZF R15/ Fiero F2. (Thanks Aparajith)
To overgear RTR 160, use the 14 teeth front sprocket from Apache RTR 180. (Thanks Khanz)

Apache RTR 180: Stock Setup: 14/46 teeth.

To overgear RTR 180, use the 15 teeth front sprocket from Bajaj Pulsar 150/ 180 UG3 only! But, buy a sprocket holder ring and the nuts to suit, as the RTR ones do not match the Pulsars' sprocket. (Thanks FlyingJian & lijok)

To undergear RTR 180, use the 13 teeth front sprocket from RTR 160, its a direct fit. (Thanks Utkarsh Stunty Sharma)

Pulsar 220 DTS Fi (Old model): Stock setup: 14/37 on .520 pitch.

To undergear it, use:
P200's rear sprocket, 38 teeth,
Karizma's rear sprocket, 40 teeth, (Thanks Praful)
KTM Duke 200's rear sprocket, 43 teeth, (Thanks joelkraju)

Pulsar 200 DTSi: Stock setup: 14/38 on .520 pitch.

To overgear it, use P220's rear sprocket, 36-37 teeth,
To undergear it, use Karizma's rear sprocket, 40 teeth, (Thanks Praful)

Pulsar 180 UG4: Stock Setup (14/ 39 on the .520 chain pitch setup. 104 links.)

To undergear it well, use a 43 teeth sprocket from a Duke 200.
The entire Duke 200 chain kit will fit, but the Duke's chain is too long, and you might need to use Pulsar 180 UG4's original chain or cut 6 links of Duke's chain. Cutting Duke 200's (or any other O-Ring) chain's links is not recommended. (Thanks chinmay_7d)

To overgear it, use P220's rear sprocket, 36-37 teeth,
To undergear it, use Karizma's rear sprocket, 40 teeth, (Thanks Praful)

Pulsar 180 and 150 UG3: Stock Setup: (15/43 and 15/44 on .428 chain pitch. 124 chain links.)

To undergear it, use Discover 135 Sports' Front Sprocket, 14 teeth. But you will need Discover's lock plate and nuts. (Thanks Prabhakar 150)

To overgear it, use the complete chain-sprocket kit of Pulsar 180 UG4 or Pulsar 200 (first ver.), which is 14/39 and 14/38 respectively.
You can remove the metal chain guard and instead, use plastic chain guard from Discover 135 Sports (Rs. 74) after drilling a hole in it, as its maintenance free O Ring chain. Don't put oil, just put chain spray on it. Remove 2 chain links from the chain, if you can. Otherwise, it will require link cutting later on as the chain wears out. (tried by Samarth 619 on P180 UG3)

For ONLY slight gearing change, you can use P150 UG3's kit in P180 UG3 (for undergearing) and P180 UG3's kit in P150 UG3 (for overgearing).

Pulsar 150 UG2 (Analog Meter): Stock setup: ~/44

To overgear, use a 40 teeth rear sprocket (with 6 fitment holes) from LML Freedom. It requires cutting 2 links from the chain. (thanks hotshot.vipin)
(The rear sprockets of FZ, R15, Pulsar UG2 and earlier, LML Freedom, have 6 fitment holes. Others mostly have 4.)

Yamaha SZ-R: Stock Setup: 14/42

To overgear it, use rear sprocket, 41 teeth from Yamaha FZ v 2.0 OR 40 teeth from Yamaha FZ16 i.e. version 1. (Thanks auggyds)

Yamaha YZF R15 Version 1.0: Stock Setup: 14/42

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

Daytona Kits for R15 (may be expensive):

To undergear it, get the Daytona Kit's 13 teeth front,
To undergear it, get the Daytona Kit's 44 teeth rear,
To overgear it, get the Daytona Kit's 40 teeth rear.

To undergear it, use the 13 teeth front sprocket from Apache RTR 160 (get it with locking ring and those 2 bolts) costs around 70 for sprocket and 12 for ring.
To overgear it, use the 15 teeth front one from R15 v2. But beware, you need to loosen the chain to accommodate this one, if yours is dialled at first setting then chances are this one isn't for you. costs about 120 for ring and sprocket.(Thanks to Tanmay26)

Yamaha FZ16: Stock Setup: 14/40

To overgear it, use front sprocket, 15 teeth from Honda Unicorn or Bajaj Pulsar 150/180 UG3. (Thanks iamvik and)
To undergear it, use rear sprocket, 42 teeth from Yamaha YZF R15. (Thanks anirudh_fz1)

Daytona Kits for FZ16 (may be expensive):

To undergear it, get the Daytona Kit's 13 teeth front or 42 or 44 teeth rear.

(For both R15 version 1.0 and FZ16, Daytona kits provide a choice of 40/42/44 teeth sprockets for rear, 13 teeth for front, and either a 122 or a 130 link chain, so you can choose your new gearing accordingly)

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 pitch. (Bike India)

Honda Stunner 125 Carb: Stock Setup: 14/~

To overgear it, use front sprocket, 15 teeth from Honda Unicorn. (Thanks cmahajan)

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)
with Rear 38T (Ambition)
with Rear 46T (CBZ Classic)

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

Hero Honda Karizma: Stock Setup: 13/40 on .520 Pitch.

To overgear, use a 38 teeth Rear Sprocket from P200, but P200 chain length is not sufficient. Adjust your Karizma Chain after installing. (Thanks Shreeni for above info)

KTM Duke 200: Stock setup: 14/43 on a .520 chain pitch. 110 chain links.

To overgear your Duke 200,
1. use a 36 teeth sprocket from P220 DTSi. (confirmed, thanks joelkraju)
2. use a 37, 38, 39, 40 teeth sprocket from P220 DTS Fi, P200 older, P180 UG4 or Karizma. (not confirmed, but these sprockets should definitely fit I think.)

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Gearing Commander Website: Guys, we can find final ratio by using any combo of sprockets by using (Rear no. of teeth/Front no. of teeth) formula.
But what if we change a lot of things like, both sprockets, rear tyres, Primary Ratio, rear rim, etc.?
Fear not, there is a solution. You can find out all about the gearing even before trying it out. Plus it has stock info on gearing of many bikes. You can use the below website for calculating gearing by entering everything that affects gearing:->

Gearing Commander: Motorcycle Speed, RPM, Chain & Sprockets Calculator (Credits: Sir Old Fox)


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I'll be adding more info. Please suggest improvements to this topic by sending me PM's/ posting here. --Samarth

Hi

Guys pls advice on undergearing hunk 2009 model and pulsar 180 2009 model.I want exact fot of front sprokets.thanks

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Hi

Guys pls advice on undergearing hunk 2009 model and pulsar 180 2009 model.I want exact fot of front sprokets.thanks


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Hi guys...I have a pulsar ns200 and looking for front sprocket 15t or 16t. Can you advise what front sprocket of other bike which will be a direct replacement without mod.
Thanks