Sprocket fit question

Mike K · February 14th, 2016, 11:07 AM

Are the sprockets the same shaft size from year to year?

RacinNinja · February 14th, 2016, 11:08 AM

Countershaft sprockets?

Mike K · February 14th, 2016, 11:29 AM

Front sprocket. On the engine output shaft.

SLOWn60 · February 14th, 2016, 12:18 PM

Quote:

Originally Posted by Mike K

Front sprocket. On the engine output shaft.

Front sprocket is the countershaft sprocket. But sorry; can't answer your question. If you search parts lists you might find if they use the same part number for the different years.

RacinNinja · February 14th, 2016, 12:20 PM

Quote:

Originally Posted by SLOWn60

Front sprocket is the countershaft sprocket. But sorry; can't answer your question. If you search parts lists you might find if they use the same part number for the different years.

They don't because the pre-gens use two bolts and a plate to retain the sprocket while the new gens use a large nut on the output shaft.

The countershafts use the same output bearing which means the shaft is the same size. However, this doesn't say anything about tooth count or shaft diameter reduction where the sprocket sits.

In short, I don't know either.

VaFish · February 14th, 2016, 01:04 PM

JT Sprockets lists different part numbers in their catalog for the front sprocket. The rear has the same part number for both generations.

so I would guess they are different.

cbinker · February 14th, 2016, 01:40 PM

new gen is different then pre gen

hfd1 tuner · February 14th, 2016, 03:43 PM

sprocket offset is different from old to new.

Mike K · February 16th, 2016, 10:40 AM

Thanks for the info.

HoneyBadgerRy · February 16th, 2016, 11:01 AM

The sprocket shaft is the same size, both will fit on both shafts, but the newgen and pregen have different offsets, so get a 07 previous for pregen and 08 newer for newgen.

Mike K · February 16th, 2016, 11:42 AM

Quote:

Originally Posted by HoneyBadgerRy

The sprocket shaft is the same size, both will fit on both shafts, but the newgen and pregen have different offsets, so get a 07 previous for pregen and 08 newer for newgen.

Thanks, that's exactly what I needed to know.

RacinNinja · February 16th, 2016, 03:30 PM

Quote:

Originally Posted by HoneyBadgerRy

The sprocket shaft is the same size, both will fit on both shafts, but the newgen and pregen have different offsets, so get a 07 previous for pregen and 08 newer for newgen.

BAM! Thanks!

Mike K · February 16th, 2016, 03:32 PM

I'm considering going -1 on the front. It's a race only bike now.

February 14th, 2016, 11:07 AM	#1
Mike K ninjette.org guru Name: Mike Location: NJ Join Date: Jul 2014 Motorcycle(s): 2014 Ninja 300 track bike, 2007 Suzuki GSXR 750 track bike, 2002 Yamaha R6, 1995 CBR600RR f3 track bike Posts: 304	Sprocket fit question Are the sprockets the same shaft size from year to year? __________________________________________________ Track, track, track

February 14th, 2016, 11:08 AM	#2
RacinNinja Vintage Screwball Name: B Location: Washington Join Date: Feb 2016 Motorcycle(s): 2011 Ninja 250, 2008 Ninja 250, 2019 KTM 1290SDR, 2017 FZ10 Posts: A lot. MOTM - Mar '16	Countershaft sprockets? __________________________________________________ Goin' fast on slow bikes!

February 14th, 2016, 11:29 AM	#3
Mike K ninjette.org guru Name: Mike Location: NJ Join Date: Jul 2014 Motorcycle(s): 2014 Ninja 300 track bike, 2007 Suzuki GSXR 750 track bike, 2002 Yamaha R6, 1995 CBR600RR f3 track bike Posts: 304	Front sprocket. On the engine output shaft. __________________________________________________ Track, track, track

February 14th, 2016, 01:40 PM	#7
cbinker Track Clown Name: Chris Location: Kingman, AZ Join Date: May 2012 Motorcycle(s): '08 250R, 21 MV F3 800, Kawasaki 400 build Posts: A lot. MOTM - Sep '15	new gen is different then pre gen __________________________________________________ TEAM ALFALFA www.apexassassins.com

February 16th, 2016, 10:40 AM	#9
Mike K ninjette.org guru Name: Mike Location: NJ Join Date: Jul 2014 Motorcycle(s): 2014 Ninja 300 track bike, 2007 Suzuki GSXR 750 track bike, 2002 Yamaha R6, 1995 CBR600RR f3 track bike Posts: 304	Thanks for the info. __________________________________________________ Track, track, track

February 14th, 2016, 01:04 PM	#6
VaFish ninjette.org certified postwhore Name: Tom Location: Northern Virginia Join Date: Jul 2015 Motorcycle(s): 2001 Ninja 250, 2019 Harley Ultra Classic, 2001 Suzuki SV650 Posts: A lot. MOTM - Jan '16	JT Sprockets lists different part numbers in their catalog for the front sprocket. The rear has the same part number for both generations. so I would guess they are different.

February 14th, 2016, 03:43 PM	#8
hfd1 tuner ninjette.org member Name: charles Location: Sugar Hill GA. Join Date: Feb 2016 Motorcycle(s): many mostly racebikes cbr565 fzr490 ex250ish Posts: 40	sprocket offset is different from old to new.

February 16th, 2016, 11:01 AM	#10
HoneyBadgerRy ninjette.org certified postwhore Name: Ryan Location: Beaufort SC Join Date: Aug 2015 Motorcycle(s): 05 Ninja 250, 04 KTM 625 SMC, 01 Xc250 Posts: A lot. Blog Entries: 3	The sprocket shaft is the same size, both will fit on both shafts, but the newgen and pregen have different offsets, so get a 07 previous for pregen and 08 newer for newgen. __________________________________________________ Because Unregistered sucks at riding.

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