Sprockets OEM vs JT carrier n Superlite steel side by side

Sep 2017
281
2
Lansing Mi
He is my findings. Side by side comparison. OEM sprocket(20k miles on it) weighs 1724g/3.8lbs. JT sprocket carrier with Superlite steel sprocket (feels like it has a hard coating on it as well)mounted weighs 1062g/2.34lbs. They both are 45 tooth. The OEM is for a 525 chain, the Superlite is a 520. I'd say that is a big difference in sprung weight. That wasnt my main focus but I'll take it. Something to note, the JT carrier doesnt just slide into the Superlite sprocket. It is a snug fit. I'm not sure that they were intended exactly to be used with one another but they do in fact fit and I'm pretty sure you want a snug fit at that point anyways. I think it looks cooler than the OEM sprocket as well. Time will tell how it holds up. ...will be using the DID ERV3 chain .
 

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Mar 2013
2,334
4
Naples, IT
Araitim,
I went with a similar setup, but just went full stupid on the sprocket center options selector (quick change carrier, superlite everything, 520, DID ERV3). I also purchased the poly sprocket bushings, which practically disintegrated on first install. They warrantied them and didn't have any problems but left me hesitant on whether those are worth it. It's possible the OEM torque they recommended was too snug and mushroomed them out beyond spec. I went a little lighter on the torque and no issues.

I tend to bulk-package my mods as I don't get much free time to wrench, plus I don't have a shelter/ garage. I do think where I noticed the weight and inertia savings with the sprocket/ chain upgrade was in the higher gears. Previously, my Strada would run out of steam in 4th gear. Now, 4th and 5th have much more linear grunt all the way to redline.
 
Sep 2017
281
2
Lansing Mi
Dis you keep OEM tooth count or did you make changes? I'm going down 1 in the front. In fact. it's all torn apart right now waiting on the mailman. He came through but didnt have it now I'm pissed because I cant ride and it's one of the only nice days left this year that I dont have to work. I shopped around to get the price down. I think its so much more at sprocket center because they use a different carrier than the JT(although they look the same and are the same shape). The one they use is quite a bit more expensive.
 
Mar 2013
2,334
4
Naples, IT
I went 14T front, OEM rear. Be interested in hearing if you get the 2nd gear stumble that Kuksol and I had/have. Could be linked to RapidBike.

You're definitely a smarter shopper than me. I was sold on the pre-sized chain option. I'm a sucker for no-fuss package deals.
 
Sep 2017
281
2
Lansing Mi
2nd gear stumble? I havnt noticed anything till this point. I'll let you know once I get the new sprocket n chain on. Do you have a link to the conversation? I'm running a slightly modified Kuksol map and settings.
 
Mar 2013
2,334
4
Naples, IT
misfire thread

We randomly discussed it in a couple other threads but this was the main conversation. No idea and has my mechanic stumped. He thinks it's an engine speed miscompare or faulty reading from one of the sensors and suspects the tuner may be involved. It's back in the shop and hopefully he makes more progress.
 
Sep 2017
281
2
Lansing Mi
Got to take it out today. Temps 35°F and its misting but I ride in this whether, just mentioning it because I dont ride aggressively when it is like this. What I thought was a fueling issue due to my specific rapidbike settings is completely gone with the new sprockets n chain. At low speeds it would pull throughout the rpm but you could feel a surging till you got higher in the rpm. You tend to not notice how bad it is when you ride every day and the problem progressively comes up. Just did a 20mile loop and it was so smooth throughout the whole range in every gear. I am kicking myself for not doing this sooner because of how smooth everything is now. The dash was reading 6000ish rpm at 85 mph and 7000ish at 95mph. It definitely pulls harder. This is exactly what I was looking for, to add a little more excitement back to the bike. No more noise while coasting to a stop as well. The old front sprocket had slightly hooked teeth. I cant describe how happy I am with this maintenance/upgrade. Like a new bike again.

Total weight loss was over 2lbs.
Notice the teeth on the old front sprocket.
Notice how much the old chain had stretched.
 

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Oct 2016
368
1
San Francisco
Definitely time for a new chain on my bike after 16k, I've noticed some stiff links and noise from the drivetrain when riding around town (the only time I don't have ear plugs in) and I can pull the chain away from the rear sprocket a bit.

If I'm doing this I'm performance focused, but a little bling can't hurt. I'm curious if you considered the superlight carrier at all, it seems like it'd be similar quality to the JT carrier, and it comes in pretty colors, so there's that.

Also debating going up a a few teeth in the rear as I'm told that'll solve some of the low end snatchiness. However, is that going to mess up my speed readings?

Still debating on going down to 520, I'm not generally an aggressive rider and favor smooth speed to launching off the line or popping wheelies, but I do like to know things aren't going to explode when I do feel a little rowdy.

Also, for front sprockets, I've seen some that have a rubber "damping", but it looks like that's just on the sides of the sprocket which seems kinda gimmicky to me.

I'm probably go for a CNC racing carrier cover as well, just because it's pretty.

Anyway, what do you all think?
 
Sep 2017
281
2
Lansing Mi
Definitely time for a new chain on my bike after 16k, I've noticed some stiff links and noise from the drivetrain when riding around town (the only time I don't have ear plugs in) and I can pull the chain away from the rear sprocket a bit.

If I'm doing this I'm performance focused, but a little bling can't hurt. I'm curious if you considered the superlight carrier at all, it seems like it'd be similar quality to the JT carrier, and it comes in pretty colors, so there's that.

Also debating going up a a few teeth in the rear as I'm told that'll solve some of the low end snatchiness. However, is that going to mess up my speed readings?

Still debating on going down to 520, I'm not generally an aggressive rider and favor smooth speed to launching off the line or popping wheelies, but I do like to know things aren't going to explode when I do feel a little rowdy.

Also, for front sprockets, I've seen some that have a rubber "damping", but it looks like that's just on the sides of the sprocket which seems kinda gimmicky to me.

I'm probably go for a CNC racing carrier cover as well, just because it's pretty.

Anyway, what do you all think?
The Superlite carrier is quit a bit more money than the JT which is why I chose the JT. I cant believe that the Superlite carrier is any lighter than the JT, definitely not worth triple the price for a few grams. JT=$60 , Superlite =$180. I look for 'bang for the buck' and performance. I went with the DID 520 chain that I chose based on many reviews and the fact that their advertisements say "
Rated to 750cc's (this chain is commonly used on 1000cc race bikes from the amatuer to professional level)".

I'm asking the wife for a fancy carrier cover for christmas. I'm eyeballing the AEM piece.

That rubber is supposed to cut down on harmonic noise from what I read. It's a necessary piece for many motorcycle companies to achieve their certification and what not OR to appease picky riders that complain about specific noises. Those are the 2 legitimate things that I have read as to why it is on OEM front sprockets.

I went down 1 tooth in the front which is equal to +3 in the rear. The bike is running beautifully smooth again but a bit easier to wheelie and get to top speed(I'm not much of a top speed guy). The speedometer is still right where it is supposed to be which makes me assume that speed is calculated by wheel speed on these bikes as opposed to transmission speed but I dont know for sure.

I use my bike as a daily driver and occasionally get aggressive. This whole package brought the excitement back to the bike.