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Discussion Starter #1 (Edited)
Talk sprockets!

Stock:
What are the stock chain link count, type, and front and rear sprocket tooth count?

Modified:
What's both the largest and smallest sprockets that fit, both front and rear, on the bike without major modification? (Meaning swap a sprocket, and at most exchange the chain with more or less links)?

I know rear sprockets we can get from rebelgears.
they make aluminum only sprockets, which usually are good for 10-15k miles max.
front sprockets are steel. I'm dependent on amazon, jt sprockets, sunstar, pbi sprockets, etc....
 

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Looks like stock final drive is 14 on the countershaft and 43 out on the wheel according to road racing world
 

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I think one sprocket change front = three sprocket change rear. One sprocket change front will not require chain alteration, three sprocket change rear might. Safe bet is making front sprocket changes:
+1 for low RPM cruising and fuel mileage
-1 for high RPM and acceleration
I don't have this bike in my hands yet, but I've heard no complaints about the gearing. Probably best gearing is stock to wring the most from this engine.
Edit: I'll go aluminum sprockets for sure after I get the bike broke in.
 

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Discussion Starter #8 (Edited)
There are titanium sprockets as well.
I don't know if I'm going to be able to afford a bike like this, this year, but if I would do mods on the gears, I would definitely do +1t (or +2t on the front if it fits), and will use gearing commander for the rear sprocket.

Rear sprockets can be found all over the place, titanium ones; or stock sized steel ones.
I'm more for aluminum ones. They're good enough for eco riding.
Racing on the tracks, you might want to opt for titanium.
 

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Discussion Starter #12
Something is off,
the Spearsracing is selling 18t front sprockets. Does the housing really have the space for it, if the stock sprocket is 14?

If that be the case, +4t front equals -12t off on the rear.

Combine that with a 55t rear (what he's selling for the rear in a kit), and it makes more sense installing a 15t or 16t front, and keeping rear sprocket, and chain stock.
That way you can save money and time on a sprocket, and chain, as +4t front and +8t rear requires a lot larger of a chain.

I might be interested in the front sprocket... 18t front would drop RPM by about a quarter, and increase mpg by about the same!
It would be geared like a 250cc bike, 100rpm per mph (No speedo healer needed, as rpm would indicate speed in final gear; 3000 rpm = 30mph, 8krpm = 80mph, etc....)
 

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Something is off,
the Spearsracing is selling 18t front sprockets. Does the housing really have the space for it, if the stock sprocket is 14?
Hey peeps. Important note: the chain and sprockets that SpearsRacing sells for the R3 are of the 415 variety. This is a much lighter weight chain with a smaller pitch than stock. So, the 18 tooth front sprocket is actually very close in diameter to the stock 14 tooth sprocket.

You definitely canNOT use these 415 sprockets with the stock chain, or the stock sprockets with the 415 chain. The 415 chain kits are meant for race use...the smallest size I'd even think about for street use is probably a 428 chain (same pitch as 415, but heavier weight). For street use, I'd recommend staying with the stock chain type (520?) and play with the number of teeth in the rear.

Just wanted to make sure that's clear...
 

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How many miles should the stock sprocket and chain last?

That's entirely up to you.


Too tight, too dry, misaligned some people can chew them out in 6000miles
Such a heavy duty 520 Oring on steel sprockets like the 42hp R3 has
Should easily get 20-30,000 miles if kept wet with quality lube like Maxima Chain wax.


Ive never replaced the chain and sprockets on a bike ive owned from new,
Best was My Triumph Daytona, sold it with 68,000km on it.... never replaced them and that bike was ridden hard, wheelied everywhere, tracked, toured, and competed in 200 metre Drag racing as well. it had 130hp.


*Except for the aftermarket Race chain I destroyed in 5 laps on the R3,
mine and the shops fault for running a clip link as the rivet didn't come in time., ive not ridden since*
 

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Vortex front -1 and rear-2 upgrade

I'm back I erased all my photos so I can post photos again. I gave up here for a while Facebook is faster and lots of the same people here are there.

Just upgraded my front to a Vortex drop -1 and -2 in the back with my new Vortex F5 hardened Aluminum sprocket. I added some new Driven red Aluminum nuts. I dropped about 1.9 pounds

I'm looking into a new 530 chain. I need a 108 link with the rivet master. looking into EK and DID as you can see in the photos I do not have much chain adjustment left.

Purchased my stuff from YamahaR3racing.com (Jesse)
Nuts are from Sportsbiketrack.com
 

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