WHAT DO I DO? -1/+3 sprockets sent to me by mistake - Suzuki GSX-R Motorcycle Forums Gixxer.com
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post #1 of 19 (permalink) Old 01-17-2019, 10:09 PM Thread Starter
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WHAT DO I DO? -1/+3 sprockets sent to me by mistake

So i ordered -1/+1 sprocket change from a stock setup with a 520 chain switch from a 530. They sent me the wrong rear, +3 (45tootb) rear and a -1 (16tooth) front is what i recieved. My question is should i send it back or just keep it and try it out? Is the difference that dramatic? By the way not a race bike, just street.
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post #2 of 19 (permalink) Old 01-17-2019, 10:32 PM
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Re: WHAT DO I DO? -1/+3 sprockets sent to me by mistake

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Originally Posted by zthomas View Post
So i ordered -1/+1 sprocket change from a stock setup with a 520 chain switch from a 530. They sent me the wrong rear, +3 (45tootb) rear and a -1 (16tooth) front is what i recieved. My question is should i send it back or just keep it and try it out? Is the difference that dramatic? By the way not a race bike, just street.
That is a huge difference. Send it back.
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post #3 of 19 (permalink) Old 01-18-2019, 03:43 AM
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Send it back. Did they send you a chain? Chain may not be long enough anyway.
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post #4 of 19 (permalink) Old 01-18-2019, 06:49 AM
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Re: WHAT DO I DO? -1/+3 sprockets sent to me by mistake

That gearing is equivalent to going +5 on the rear. Have you ever ridden a 1000 with a 47t rear? You'll never get past 1/2 throttle on the street without flipping over...
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post #5 of 19 (permalink) Old 01-18-2019, 08:52 AM Thread Starter
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Re: WHAT DO I DO? -1/+3 sprockets sent to me by mistake

Ya they did send me a chain with it. It was a vortex chain and sprocket kit. I'm sending it back. What setup do yall recommend? I'm wanting more low end torque but obviously not to much that 1/2 throttle has me flippin this mofo.
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post #6 of 19 (permalink) Old 01-18-2019, 09:41 AM
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Re: WHAT DO I DO? -1/+3 sprockets sent to me by mistake

Try a 16t front a leave the rear stock;you can always add teeth to the rear if you feel you need more afterwards
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post #7 of 19 (permalink) Old 01-18-2019, 11:19 AM
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Re: WHAT DO I DO? -1/+3 sprockets sent to me by mistake

-1 on the front is likely all you'll need.
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post #8 of 19 (permalink) Old 01-18-2019, 02:46 PM Thread Starter
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Michael from Family Powersports says that they dont make a 520 rear sprocket with any less than 45 tooth
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post #9 of 19 (permalink) Old 01-18-2019, 03:24 PM
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Re: WHAT DO I DO? -1/+3 sprockets sent to me by mistake

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Originally Posted by zthomas View Post
Michael from Family Powersports says that they dont make a 520 rear sprocket with any less than 45 tooth
Since you posted in the K9-L1 1K forum,I'm basing my info on that....that being said,several company's make a stock tooth(42t in this case) aluminum 520 rear sprocket. Here's 2 off the top of my head:

https://www.motomummy.com/sprockets/...rear-sprocket/

https://www.motomummy.com/sprockets/...rear-sprocket/

Renthal makes rears from 40t-48t
Driven makes rears from 39t-50t

There are several other popular aftermarket company's I've excluded who also make those sprockets,so Micheal from Family Motorsports is incorrect
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post #10 of 19 (permalink) Old 01-18-2019, 04:33 PM
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Quote:
Originally Posted by zthomas View Post
By the way not a race bike, just street.
Why would you do this to a street bike? With a 520 conversion, you will eat those sprockets up (esp the front) in no time. Those smaller teeth cannot handle the torque, especially if you clutch wheelies. Racers get away with it because they are changing them all the time.

I did it to a 600 a long time ago and probably only got 5K (6 months) out of them. I ride hard, but have better things to spend money on.

IMO, you should never change the gearing for a street bike either. The engineers spend a great deal of time coming up with the ideal ratio for street riding. If you don't leave town with it, by all means.
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post #11 of 19 (permalink) Old 01-18-2019, 04:52 PM
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Re: WHAT DO I DO? -1/+3 sprockets sent to me by mistake

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Originally Posted by MadViking View Post
Why would you do this to a street bike? With a 520 conversion, you will eat those sprockets up (esp the front) in no time. Those smaller teeth cannot handle the torque, especially if you clutch wheelies. Racers get away with it because they are changing them all the time.
Disagree.
I had a 3D 520 chain&aluminum rear sprocket on my L3 w head/cams/etc,made 190rwhp+ and had zero issues with excessive wear.

Spent a lot of time at the drag strip with that bike too. If you maintain/lube your chain diligently you'll easily see 10k+ miles from a 520 conversion on an aggressively ridden 1K.
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post #12 of 19 (permalink) Old 01-18-2019, 08:45 PM
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I'd say, as others have also mentioned - 1 is a good starting point, definitely brings the bike to feel more 'on'. Easily power wheelies 1st as soon as it hits WOT on my k5.

520 is fine, mine sees the drag strip almost weekly and seems to be fine, just keep it well maintained and keep an eye on it as you should regardless. I run 520 steel Driven sprockets and ek mvxz chain.
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post #13 of 19 (permalink) Old 01-19-2019, 10:43 AM
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Be honest, how often do you inspect the front sprocket? It has the fewest teeth and tightest radius. The teeth will start laying over well before the back starts showing wear. Even 10K miles is not acceptable mileage for a $300 setup that provides very little gain. Fine on a track bike.
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post #14 of 19 (permalink) Old 01-19-2019, 01:47 PM
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Re: WHAT DO I DO? -1/+3 sprockets sent to me by mistake

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Originally Posted by MadViking View Post
Be honest, how often do you inspect the front sprocket? It has the fewest teeth and tightest radius. The teeth will start laying over well before the back starts showing wear. Even 10K miles is not acceptable mileage for a $300 setup that provides very little gain. Fine on a track bike.
I juggle gearing quite often so inspecting the front is a non-issue,the 520 front is steel and showed no signs of wear.
Teeth laying over from the tight radius? It's a 16t not a 14t or 15t; running a 16t on the street is basically common practice&one of the 1st mods any rider does as it's cheap&shows a seat of the pants improvement. If your bike is make 250-300rwhp and 125-175ft/lbs then yeah,I'd be concerned running a 530 16t let alone a 520.....

Again,I've run a 520 chain on a K5 1K ten years ago that made 200rwhp+,ran 8sec 1/4's,topped out well over 200mph blah blah blah and basically beat the snot out of it. Yet my set-up showed no extreme signs of wear as you describe you had with your 520 set-up&if the teeth on the CS were going to roll over I'm sure they would have started to after the 7-8k miles
I had on the set-up before selling the bike.

$300? Pretty sure I paid $220ish from motomummy on my last 520 chain/sprocket conversion.


Also,disagree with your statement regarding changing gearing on a street bike: IMO, you should never change the gearing for a street bike either. The engineers spend a great deal of time coming up with the ideal ratio for street riding. If you don't leave town with it, by all means.

Why not? Speaking from experience a K5/6 1000 will top out at 100mph in 1st gear. Pretty tall for a street bike wouldn't you say? So switching the front from a 17t to a 16t for easier commuting is a huge no-no? Please explain...

Last edited by oldgixxer; 01-19-2019 at 01:53 PM.
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post #15 of 19 (permalink) Old 01-19-2019, 03:09 PM
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Re: WHAT DO I DO? -1/+3 sprockets sent to me by mistake

"Michael from Family Powersports says that they dont make a 520 rear sprocket with any less than 45 tooth"
He ordered the wrong part, can't or doesn't want to return it, and is trying to BS his way around it.

AFAM: 40-51
Sprocket Specialists: 22-74 (irk!)
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post #16 of 19 (permalink) Old 01-19-2019, 05:37 PM
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Quote:
Originally Posted by MadViking View Post
Be honest, how often do you inspect the front sprocket? It has the fewest teeth and tightest radius. The teeth will start laying over well before the back starts showing wear. Even 10K miles is not acceptable mileage for a $300 setup that provides very little gain. Fine on a track bike.
16 teeth is what alot of new bikes come with standard, I know cbr1000rr come with 16t front. That's 1 down for gsxr 1000s. Not that tight of a radius if bikes come with them standard.

Front sprockets are cheap as anyway, buy a 16t and a 17t and see which you like, you can easily change one out in less than 30mins. Chain doesn't need to come apart, and just put a pole with a rag around it in the rear wheel when removing /installing sprocket nut.
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post #17 of 19 (permalink) Old 01-19-2019, 05:41 PM
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I've tried both and definitely think the - 1 front is a good mod, the bike moves through the higher gears noticeably quicker. Seems to be better for both circuit and drag.
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post #18 of 19 (permalink) Old 01-20-2019, 01:15 AM
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Just offering my opinion, not here to argue.

A 15 tooth sprocket has less teeth to spread the SAME load than a 16 or 17 or 18. Therefore, they will start to lay over. It is also smaller in diameter, which means a smaller radius the chain must bend around. That heats and flexes the chain more causing more wear. This is all basic geometry and discussed at length on technical sites. If you think it is BS or insignificant, fine by me.

The front should be as large as the case allows. The only reason people change the front is cost and you can typically get away with using the same chain length. A smaller front sprocket can also cause the chain to ride on the swingarm chain guard instead of just contacting it as the suspension travels.

Sure, they will do 100 in first. Do you ride it like that on the street? Gear it 15/70. It will still run well above the speed limit in 6th and you will maximize performance!

I mean, like other have said, it will now effortlessly power wheelie in first. There is a fine line between wheelies and hard acceleration.

I drag race a motorcycles several times a year. I also drag race cars. I remember back before drag radials, my car ran better ETs with 3.08 gears versus 3.73. Tire spin was too hard to control all through first and you would have to be gentle on the 1-2 shift. On slicks it would be different, just like if your bike is stretched.

At the end of they day, we all know it boils down to personal preference. I have tried it and didn't like it. Others will. I guess I was playing the devil's advocate.
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post #19 of 19 (permalink) Old 01-20-2019, 09:06 AM
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Re: WHAT DO I DO? -1/+3 sprockets sent to me by mistake

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Originally Posted by MadViking View Post
Just offering my opinion, not here to argue.

A 15 tooth sprocket has less teeth to spread the SAME load than a 16 or 17 or 18. Therefore, they will start to lay over. It is also smaller in diameter, which means a smaller radius the chain must bend around. That heats and flexes the chain more causing more wear. This is all basic geometry and discussed at length on technical sites. If you think it is BS or insignificant, fine by me.

The front should be as large as the case allows. The only reason people change the front is cost and you can typically get away with using the same chain length. A smaller front sprocket can also cause the chain to ride on the swingarm chain guard instead of just contacting it as the suspension travels.

Sure, they will do 100 in first. Do you ride it like that on the street? Gear it 15/70. It will still run well above the speed limit in 6th and you will maximize performance!

I mean, like other have said, it will now effortlessly power wheelie in first. There is a fine line between wheelies and hard acceleration.

I drag race a motorcycles several times a year. I also drag race cars. I remember back before drag radials, my car ran better ETs with 3.08 gears versus 3.73. Tire spin was too hard to control all through first and you would have to be gentle on the 1-2 shift. On slicks it would be different, just like if your bike is stretched.

At the end of they day, we all know it boils down to personal preference. I have tried it and didn't like it. Others will. I guess I was playing the devil's advocate.
Lol this ain't my first rodeo..I understand all about sprocket radius,chain binding,etc etc..I have 2 turbo bikes;we go from an OEM 17t CS to a 18t,19t,some even run a 20t if it fits inside the sprocket cover. Put a 16t CS on one of those,yeah it's gonna do all those nasty things you mentioned above.

Yes,all boils down to personal preference as you said and it's been discussed here literally hundreds of times over the last 20yrs the forum has been up so no groundbreaking secret info has been leaked in this thread,should all be common knowledge to most folks. Oh,wait..you're new
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