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**JDD** · 05-17-2015, 08:18 AM

Re: World of Sprockets!

I'm working on getting the 16/45 428 manufactured, but it would be here in the Philippines most likely.. need some weeks to get sample and test it. but I'm sure you could find a shop in India to make the 45 428 rear sprocket. the front is a stock Honda XRM pinion. Chain should be the best quality durability, (5000 plus tensile strength) 132 link count.

**Tanzing Sherpa** · 05-17-2015, 08:39 AM

Re: World of Sprockets!

Guys what would be the best option to upgrade sprocket of 200 NS. I want more acceleration but with its top end as possible. Help me here.

**krixna** · 05-17-2015, 09:11 AM

Re: World of Sprockets!

Originally posted by JDD View Post

I'm working on getting the 16/45 428 manufactured, but it would be here in the Philippines most likely.. need some weeks to get sample and test it. but I'm sure you could find a shop in India to make the 45 428 rear sprocket. the front is a stock Honda XRM pinion. Chain should be the best quality durability, (5000 plus tensile strength) 132 link count.

Came across this:

Pulsar 200 NS Racing kit - Pulsar 200 ns top speed Dj Fast-RADIO MIX HN

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**JDD** · 05-17-2015, 10:52 AM

Re: World of Sprockets!

Yes KIT Racing is available, but to import it is expensive, I have talked to them, nice people. Where I live taxes and shipping more than double the price. Depends what you are willing to pay.

**krixna** · 05-23-2015, 01:18 AM

Re: World of Sprockets!

Originally posted by JDD View Post

Yes KIT Racing is available, but to import it is expensive, I have talked to them, nice people. Where I live taxes and shipping more than double the price. Depends what you are willing to pay.

At present, I'm using the 36T rear sprocket only from the 220. Front sprocket remains same since I can't find one with 15T for 520.

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**JDD** · 05-23-2015, 09:01 AM

Re: World of Sprockets!

Originally posted by krixna View Post

At present, I'm using the 36T rear sprocket only from the 220. Front sprocket remains same since I can't find one with 15T for 520.

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for what its worth I am going to drop down to a 428 pitch HD chain for less rolling mass, and faster rev up in each gear. 16/45. The pinion is a stock Honda XRM part, and i am having the rear sprocket made to order. If you just want to do one you can buy a sprocket from another bike re drill or cut and weld two together.

**krixna** · 05-23-2015, 10:44 AM

Re: World of Sprockets!

Originally posted by JDD View Post

for what its worth I am going to drop down to a 428 pitch HD chain for less rolling mass, and faster rev up in each gear. 16/45. The pinion is a stock Honda XRM part, and i am having the rear sprocket made to order. If you just want to do one you can buy a sprocket from another bike re drill or cut and weld two together.

16/45 428 will have a bigger turning radius wrt to pitch, so you can hope the oil will stay on the chain. The 520 turning around 14 teeth leaves all the oil dripping down on the gear shifter shaft. One of the reasons I'm searching for a 15T. Btw, for 428, the sprockets from 180 (the latest 180s changed to 520) are a direct fit I think. You'll get 15/42 428

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**JDD** · 05-23-2015, 05:06 PM

Re: World of Sprockets!

Originally posted by krixna View Post

16/45 428 will have a bigger turning radius wrt to pitch, so you can hope the oil will stay on the chain. The 520 turning around 14 teeth leaves all the oil dripping down on the gear shifter shaft. One of the reasons I'm searching for a 15T. Btw, for 428, the sprockets from 180 (the latest 180s changed to 520) are a direct fit I think. You'll get 15/42 428

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There should be no oil dripping anywhere, we should be using a spray chain lube which sticks to the chain and does not fly off or drip. all the 180's here in the Philippines have 520 pitch chains.

----consecutive posts auto-merged-----

Originally posted by krixna View Post

16/45 428 will have a bigger turning radius wrt to pitch, so you can hope the oil will stay on the chain. The 520 turning around 14 teeth leaves all the oil dripping down on the gear shifter shaft. One of the reasons I'm searching for a 15T. Btw, for 428, the sprockets from 180 (the latest 180s changed to 520) are a direct fit I think. You'll get 15/42 428

Sent from my CRXT 1125Q using xBhp Connect mobile app

There should be no oil dripping anywhere, we should be using a spray chain lube which sticks to the chain and does not fly off or drip. all the 180's here in the Philippines have 520 pitch chains.

**krixna** · 05-23-2015, 05:56 PM

Re: World of Sprockets!

Originally posted by JDD View Post

There should be no oil dripping anywhere, we should be using a spray chain lube which sticks to the chain and does not fly off or drip. all the 180's here in the Philippines have 520 pitch chains.

----consecutive posts auto-merged-----

There should be no oil dripping anywhere, we should be using a spray chain lube which sticks to the chain and does not fly off or drip. all the 180's here in the Philippines have 520 pitch chains.

Maybe the guys at the service centre are doing something else. I think they are spraying some cleaner, then the lube. They managed to spray it on my rear disc once and I found that out the hard way :banghead: , escaped by a hairline. High time I got a spray and do it myself. In India, 180 Gen 1,2 and 3 are 428, Gen 4 is 520.

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**Ralph James** · 06-08-2015, 01:30 PM

RTR 160 front sprocket fits good on R15

Successfully undergeared my R15v1 with the RTR 160s front 13T and it was an 99% match. Had to bolt down the clip to the sprocket and with much effort I could manage to lock only one bolt instead of two, as the other is fairly tight but wouldn't go all the way through.
Apart from that, bike feels much better in streets as it can handle 2-3k rpms with ease now.
Top speed isn't affected much, as 4k rpms at 6th reads a 56ish instead of 60kmph with 14T.

When I coupled this with my PowerTronic I wasn't very happy as it somewhat limited acceleration as the bike was probably giving it out itself and the ECU didn't wanna interfere or something of that sort, just thinking loud.

So I then overgeared the front to the R15v2.0 15T and since acceleration was suffering the Powertronic restored it to slightly better acceleration than stock but for more speed.
Speedo now reading 64ish on 6th at 4k rpms.

Thanks to whomsoever it may concern.

**auggyds** · 06-25-2015, 08:55 PM

Re: World of Sprockets!

Originally posted by auggyds View Post

Hi guys, this is my first post on xbhp. Have been following xbhp since the last 3 years and I end up learning something new practically everyday. Getting to my query, I own a Yamaha sz r 16 and have overgeared it from a 42 teeth rear sprocket to a Yamaha fz 40 tooth one. I recently changed my tyre and it is lower in profile thus under gearing the bike again. I don't intend reverting to the stock tvs tyre because it's absolutely pathetic. I intend fitting a 15 tooth front sprocket. I asked around and procured an old 14 tooth szr sprocket. Now it seems that the central shaft hole is slightly bigger than the ones on the Honda unicorn/ Pulsar 150/ R15 2.0. If any one of you guys could help me out with which sprocket would be compatible, it would be much appreciated. Thanks in advance.

Still awaiting a reply!

**Samarth 619** · 06-26-2015, 03:11 AM

Re: World of Sprockets!

Originally posted by auggyds View Post

Hi guys, this is my first post on xbhp. Have been following xbhp since the last 3 years and I end up learning something new practically everyday. Getting to my query, I own a Yamaha sz r 16 and have overgeared it from a 42 teeth rear sprocket to a Yamaha fz 40 tooth one. I recently changed my tyre and it is lower in profile thus under gearing the bike again. I don't intend reverting to the stock tvs tyre because it's absolutely pathetic. I intend fitting a 15 tooth front sprocket. I asked around and procured an old 14 tooth szr sprocket. Now it seems that the central shaft hole is slightly bigger than the ones on the Honda unicorn/ Pulsar 150/ R15 2.0. If any one of you guys could help me out with which sprocket would be compatible, it would be much appreciated. Thanks in advance.

Since SZR is a comparatively new bike, I don't have much data on it. I can only suggest you go for another tyre at the end of the tyre life, which is of the stock (or taller) profile.

One more suggestion is a slightly risky one: Go to an engineering shop and ask them to develop a part which fits between your sprocket shaft and the front sprocket of Pulsar 150, etc. It will be successful only if done precisely. But, I am not recommending this.
Also, check Honda Unicorn's front sprocket. I'm not sure if it will fit or not though.... And, I have added data provided by you in the first post of this thread, with credits.

Originally posted by anarchy911 View Post

Which is better, changing front or rear sprocket?
I have pulsar 180. I read in the intro page that for undergearing, duke 200 and for overgearing, p220. Has anyone done it?

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Only one man can tell you this... The man who suggested this addition. [MENTION=10473]Praful[/MENTION] [MENTION=10473]Praful[/MENTION]tripathy

Originally posted by Jaudere View Post

Hi, This is my first post here. I ride Apache RTR 160 and planning to try out sprocketing. I have few questions.

In the initial posts, it is said that when changing gear ratio with sprocketing, one should not go beyond 6% change on stock motor.
Why this figure of 6%? if the rider knows his driving style and never red-lines or goes into knocking zone, it is ok if one goes higher, say 12%? if one goes beyond the said 6%, what could be the expected damage?

In my opinion, there's no such short term damage, if the fitment was a good quality work...
Riding solo on an overgeared bike is as damaging as, riding two/three-some on a normally geared bike at less rpms. Engine may be under pressure normally, but there's no logic for it to be damaged as such.

However, before going out for top speeds, you must check if your vehicle's components can handle it.For example, Pulsar 180 ug3 series doesn't have a very good frame for high speeds, it feels wobbly even at 110. Taking this bike to 135 or so, isn't the best thing in my opinion.

Similarly, undergeared bikes as such receive no damage, (unless you're redlining a lot).
Why? Because riding an undergeared bike in 5th gear, will be equal to riding the same bike on normal gearing, in 4th or 3rd gear.
Apache RTR and Duke 200 are known for their lower than normal gearing, from company itself.

Your mileage certainly gets affected though, and it depends on your normal commute/ ride and the extent of over/ under gearing. And of course, riding style too.

I went through sprocket combos of few bikes from same category. FZ using 14/40 vs 13/44 of RTR despite having BHP and torque figures quite close (in fact RTR has marginally better power and torque but much lower gear ratio). Hunk/CBZ xtreme has 14/43. Now if I change to 14/43 like Hunk or 14/40 like FZ, it is well beyond 6% limit.
100-110 CC bike like TVS Star City uses 13/41. How does it handle such a gear ratio despite having low BHP and torque?
I went through many pages but could not find answer to these questions. If someone has already answered this, please redirect me to the appropriate page.

See, even YZF R1 might share a sprocket teeth combination with a smaller motorcycle, but that comparison will never mean anything...

Because, a sprocket setup ONLY forms the Secondary Ratio... but we still don't know the primary ratio.
Primary ratio is the gearbox's gears and their no. of teeth. They also help determine final gearing.

Overall gearing (speed @ a certain rpm) is a combined factor of both Primary and Secondary Ratios.... And it also includes the rear tyre size.

That's why you see FZ and RTR using widely different secondary ratios. Because primary ratios are not visible to us.

I hope I am clear with this? If not you can post again or PM me...

**auggyds** · 06-27-2015, 01:09 AM

Re: World of Sprockets!

Thanks Samarth 619 for replying. One guy even recommended that I change the drive shaft to that of the FZ 16 for which the engine would need to be opened. I just nodded and walked away.

**satheez_7** · 07-02-2015, 06:11 PM

Re: World of Sprockets!

Hi Guys, I am planning to do changes in sprockets to increase the top speed for my Hero Impulse.
Anyone here tried? Stock sprocket setting is 17T/50T.
Please suggest. Thanks in Advance.

**auggyds** · 07-09-2015, 04:16 PM

Re: World of Sprockets!

Check the fitment holes and the chain pitch. If its got 4 fitment holes and pitch .428 then check with other hero moto corp sprockets as per your requirement.

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