Front Sprocket help - ZX6R Forum
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post #1 of 15 Old 04-11-2017, 02:23 PM Thread Starter
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Front Sprocket help

I dropped my bike off at the shop to have some maintenance done this week. I called them today to check on something and the Service Manager asked me where I got my sprockets from. I told him I ordered the kit on eBay from some place in the US. Anyways, they are JT sprockets, the kit came with a D.I.D. chain. The Service Manager told me that the front sprocket was off by a millimeter and that it must be the wrong sprocket. We checked the part numbers with JT Sprockets and the part number matched so we know it's the right sprocket to fit the bike (part # JTF1307.15). I called JT and they said to make sure the oil seal between the sprocket and engine is pushed all the way in. The Service Manager says its not the oil seal. They told me to measure the thickness of the sprocket and that matched up as well. After a few phone calls with the Service Manager he told me he could make it work, and he assured me that 1mm should not be a problem. However, I wanted to get some opinions of this from you guys on here to see if there is much cause for concern?
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post #2 of 15 Old 04-11-2017, 02:39 PM
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Dunno if it is something to worry about but I was researching those sprockets the other day as I'm about to order a chain and sprocket kit and they're suppoesd to be excellent. They supply a lot of manufacturers I guess.
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post #3 of 15 Old 04-11-2017, 02:46 PM Thread Starter
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Originally Posted by capitalcrew View Post
Dunno if it is something to worry about but I was researching those sprockets the other day as I'm about to order a chain and sprocket kit and they're suppoesd to be excellent. They supply a lot of manufacturers I guess.
Yea from what I've read they're supposed to be pretty good, and when I talked to the guy at JT he told me they've probably sold 20,000 of those front sprockets and they very rarely hear of any issues. Hopefully everything will be all good. If anyone has any advice I'd appreciate it. Thanks.
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post #4 of 15 Old 04-11-2017, 02:49 PM
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JT sprockets are fine. They work great. I have used them many times on dirt bikes in the past. As long as the sprocket does not move the chain too far inward where it can rub on the counter shaft seal or case and not line up with the rear sprocket, you are fine with 1mm off.
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post #5 of 15 Old 04-11-2017, 02:54 PM Thread Starter
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JT sprockets are fine. They work great. I have used them many times on dirt bikes in the past. As long as the sprocket does not move the chain too far inward where it can rub on the counter shaft seal or case and not line up with the rear sprocket, you are fine with 1mm off.
Thanks for the info!
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post #6 of 15 Old 04-11-2017, 06:40 PM
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JT does not supply sprockets to any manufacturer (Honda, Kawasaki, Suzuki or Yamaha)

There is a reason they are dirt cheap............they are cheap

They are stamped, not hardened very well, definitely not flat nor are they actually round

My personal experience with them............12k max vs 25k out of most other brands out there

My professional experience with them..... I will neither sell them nor install them on anyones bike

They are low quality low buck crap for the masses to consume because that is their expectation (they want cheap ass shit regardless of quality)and most will not keep the bike or use the bike long enough to see how poor they truly are
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post #7 of 15 Old 04-12-2017, 05:08 AM Thread Starter
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JT does not supply sprockets to any manufacturer (Honda, Kawasaki, Suzuki or Yamaha)

There is a reason they are dirt cheap............they are cheap

They are stamped, not hardened very well, definitely not flat nor are they actually round

My personal experience with them............12k max vs 25k out of most other brands out there

My professional experience with them..... I will neither sell them nor install them on anyones bike

They are low quality low buck crap for the masses to consume because that is their expectation (they want cheap ass shit regardless of quality)and most will not keep the bike or use the bike long enough to see how poor they truly are
Thanks for the info. I thought JT had pretty good customer service, a manager spoke with me multiple times on the phone and even offered to replace the sprocket if it becomes an issue. Last thing I want is for something to f**k up at high speed, so at the end of the day, all I'm concerned about is if it being off 1mm is going to cause me trouble?

Last edited by novak; 04-12-2017 at 05:10 AM.
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post #8 of 15 Old 04-12-2017, 06:42 AM
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I've read conflicting information about them supplying manufacturers, so I won't argue that.
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post #9 of 15 Old 04-12-2017, 11:25 AM
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You could argue that Renthal sprockets (aluminum rear/steel front) are a quality product but in my experience on many dirt bikes, they are shit. I even have a friend who worked for them for 20 yrs and I get a good discount. I was referring to JT steel sprockets. I have used them with no issue.
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post #10 of 15 Old 04-12-2017, 11:29 AM
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Get some Vortex sprockets next time man
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post #11 of 15 Old 04-12-2017, 11:30 AM Thread Starter
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You could argue that Renthal sprockets (aluminum rear/steel front) are a quality product but in my experience on many dirt bikes, they are shit. I even have a friend who worked for them for 20 yrs and I get a good discount. I was referring to JT steel sprockets. I have used them with no issue.
Good to know. I hope I don't run into any issues either!
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post #12 of 15 Old 04-12-2017, 12:33 PM
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I've got JT sprockets along with an EK chain on my G2, and have zero complaints. The alignment and installation of both the front and rear sprockets was spot on.

Have you considered fitting a Scottoiler? No need to scrub the chain and re-lube. Fit it, fill the reservoir with the oil, and enjoy around 2500 miles of almost bugger-all chain/sprocket maintenance. The e-system I have fitted even tells you how much is left in the reservoir, and you can adjust the settings to your hearts content. To make things even more interesting, it'll make your chain and sprockets last a hell of a lot longer.

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post #13 of 15 Old 04-12-2017, 02:30 PM
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Quote:
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I've got JT sprockets along with an EK chain on my G2, and have zero complaints. The alignment and installation of both the front and rear sprockets was spot on.

Have you considered fitting a Scottoiler? No need to scrub the chain and re-lube. Fit it, fill the reservoir with the oil, and enjoy around 2500 miles of almost bugger-all chain/sprocket maintenance. The e-system I have fitted even tells you how much is left in the reservoir, and you can adjust the settings to your hearts content. To make things even more interesting, it'll make your chain and sprockets last a hell of a lot longer.

For Canada, Scottoiler - TwistedThrottle.ca
Interesting.......that is technology for you. I have never seen that thing before. I really don't go for long rides so oiling the chain isn't really an issue. The system looks cool for a touring guy.
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post #14 of 15 Old 04-12-2017, 05:48 PM
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It's not so much the touring aspect that persuaded me to fit these to my bikes (I think if touring's your bag, get something with shaft drive). I've been using these - in various iterations - for donkey's years.

1. They really do extend the life of your chains and sprockets (A LOT!).
2. They reduce maintenance to the occasional clean with some kerosene and a light smear of the oil every now and again.
3. They're one of the few accessories that actually ADD value to your bike.

SoCal weather is very different to that with which I have to deal. But, even if I lived there, I'd still fit one.

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post #15 of 15 Old 04-28-2017, 01:50 PM
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When you say it's 1mm off, what do you mean? 1mm too thick, 1mm too thin, 1mm to the left, 1mm to the right (toward the engine), 1mm something else?

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