"conversion" sprocket question

CThunder-blue · March 1st, 2011, 01:25 PM

I want to go to a 15/43 combo and I found a rear sprocket, but the item description says it's a 520 conversion sprocket. Why do they call it a conversion sprocket if the factory chain is a 520 chain?

http://www.sprocketcenter.com/p/6009...sprocket-.html

Alex · March 1st, 2011, 01:44 PM

I think it's only because many (most?) bikes would be converting from a 525 or 530 chain to a 520. We're already at 520.

CThunder-blue · March 1st, 2011, 03:32 PM

Thanks Alex. I'm going to order it and cross my fingers that there's nothing wrong with it. Are the rear sprockets the same between the old gen and new?

Alex · March 1st, 2011, 03:49 PM

I'm not sure.

CThunder-blue · March 1st, 2011, 05:01 PM

I think I'm going to pass on the drive systems sprockets. They list their stuff for 88-10 so I'm guessing the sprockets are for the pregen.

CThunder-blue · March 1st, 2011, 07:42 PM

Well, according to the Supersprox and Vortex websites, the rear sprockets are the same.

42041-0011 is the part number I found off of cheapcycleparts.com and the numbers apply to both a 2005 and a 2009.

CThunder-blue · March 2nd, 2011, 09:33 AM

Yeah, I knew the fronts were different from reading the many threads on here.

littledog · March 2nd, 2011, 05:31 PM

Between the ??-07 bikes and the 08-11 bikes the rear sprockets are the same. The front sprockets, not exactly the same. BUT the sprocket for the older models does fit and as far as I can tell the very slightly thicker (like 1/2 mm) new model one is made of unobtanium.

KGar · March 3rd, 2011, 11:00 AM

In regards to rear sprockets,is there a benefit to alloy over steel? weight? wear?

Alex · March 3rd, 2011, 11:15 AM

Aluminum sprockets are lighter, but wear significantly faster. No real benefit for a streetbike.

KGar · March 3rd, 2011, 11:27 AM

Oh well, I just realized that the JT 43t sprocket I ordered from Tucker Rocky is alloy and it should be here tommorow. I should have paid more attention when I ordered it. I will post how long it last and go back to steel from there.

CThunder-blue · March 3rd, 2011, 12:34 PM

It would be interesting to see how long it takes to wear the AL sprocket. I was actually concerned with the teeth breaking off, but with such a low HP bike, I don't think that's a real issue. I went with a Drive Systems superlite rear sprocket. Made of Steel and supposed to be as light as a supersprox. I almost bought a supersprox until I read some not so favorable reviews on them. Also picked up a Driven front sprocket from fatbikez for $22 shipped

. Ordered up a DID chain as well.

KGar · March 3rd, 2011, 01:06 PM

I got the 15t front for $18 and the rear 43t was $46. I just hope I get a few hundred miles out of the alloy but like you said these bikes do not have much hp.

CThunder-blue · March 3rd, 2011, 03:00 PM

Yeah, the JT's are cheaper, but it's difficult to know which one is the right one. Lots of info stating one way or the other. The driven has at least one person who says that there are no shims needed for it. I don't mind the extra $5 since if it needed shims, that's additional cost and time needed.

CThunder-blue · March 4th, 2011, 07:18 PM

argh, Driven sprocket is on back order until the end of the month.

KGar · March 8th, 2011, 12:09 PM

Installed the 43t alloy last night which now gives me a 15/43. Cruising in to work this morning at 80 in the diamond lane was so nice! I still had power to enter the freeway comfortably without lugging. Feels like I can actually use first gear now, before it was a joke. I do love this set up. OBTW the weight diff between steel and alloy is incredible, and the bright color looks awesome surrounded by all of that black.

Alex · March 8th, 2011, 12:18 PM

Quote:

Originally Posted by Redrider

OBTW the weight diff between steel and alloy is incredible,

The issue of course, is that it's bolted directly to a 30+ pound rotating wheel/tire combination, where the weight differences of a small sprocket right in the middle doesn't affect much at all.

CThunder-blue · March 8th, 2011, 01:29 PM

Quote:

Originally Posted by Alex

The issue of course, is that it's bolted directly to a 30+ pound rotating wheel/tire combination, where the weight differences of a small sprocket right in the middle doesn't affect much at all.

I agree. When considering which to buy, I would prefer the longevity of the steel to the alloy over the .1 HP you might be freeing up.

Alex · March 8th, 2011, 01:56 PM

Quote:

Originally Posted by CThunder-blue

I agree. When considering which to buy, I would prefer the longevity of the steel to the alloy over the .1 HP you might be freeing up.

More like 0.001.

CThunder-blue · March 8th, 2011, 02:09 PM

I was being generous!

caliente103 · March 12th, 2011, 05:26 PM

Quote:

Originally Posted by Redrider

Installed the 43t alloy last night which now gives me a 15/43. Cruising in to work this morning at 80 in the diamond lane was so nice! I still had power to enter the freeway comfortably without lugging. Feels like I can actually use first gear now, before it was a joke. I do love this set up. OBTW the weight diff between steel and alloy is incredible, and the bright color looks awesome surrounded by all of that black.

:-)

March 1st, 2011, 01:25 PM	#1
CThunder-blue ModMy250.com Name: Tri Location: St, Louis Join Date: Sep 2010 Motorcycle(s): 2009 Ninja 250R, 2005 R6 Posts: A lot.	"conversion" sprocket question I want to go to a 15/43 combo and I found a rear sprocket, but the item description says it's a 520 conversion sprocket. Why do they call it a conversion sprocket if the factory chain is a 520 chain? http://www.sprocketcenter.com/p/6009...sprocket-.html __________________________________________________ The www.ModMy250.com guy

March 1st, 2011, 01:44 PM	#2
Alex ninjette.org dude Name: 1 guess :-) Location: SF Bay Area Join Date: Jun 2008 Motorcycle(s): '13 Ninja 300 (white, the fastest color!), '13 R1200RT, '14 CRF250L, '12 TT-R125LE Posts: Too much. Blog Entries: 7	I think it's only because many (most?) bikes would be converting from a 525 or 530 chain to a 520. We're already at 520. __________________________________________________ Montgomery Street Motorcycle Club / cal24.com / crf250l.org / ninjette.org ninjette.org Terms of Service Shopping for motorcycle parts or equipment? Come here first. The friendliest Ninja 250R/300/400 forum on the internet! (especially Unregistered)

March 1st, 2011, 03:32 PM	#3
CThunder-blue ModMy250.com Name: Tri Location: St, Louis Join Date: Sep 2010 Motorcycle(s): 2009 Ninja 250R, 2005 R6 Posts: A lot.	Thanks Alex. I'm going to order it and cross my fingers that there's nothing wrong with it. Are the rear sprockets the same between the old gen and new? __________________________________________________ The www.ModMy250.com guy

March 1st, 2011, 03:49 PM	#4
Alex ninjette.org dude Name: 1 guess :-) Location: SF Bay Area Join Date: Jun 2008 Motorcycle(s): '13 Ninja 300 (white, the fastest color!), '13 R1200RT, '14 CRF250L, '12 TT-R125LE Posts: Too much. Blog Entries: 7	I'm not sure. __________________________________________________ Montgomery Street Motorcycle Club / cal24.com / crf250l.org / ninjette.org ninjette.org Terms of Service Shopping for motorcycle parts or equipment? Come here first. The friendliest Ninja 250R/300/400 forum on the internet! (especially Unregistered)

March 1st, 2011, 05:01 PM	#5
CThunder-blue ModMy250.com Name: Tri Location: St, Louis Join Date: Sep 2010 Motorcycle(s): 2009 Ninja 250R, 2005 R6 Posts: A lot.	I think I'm going to pass on the drive systems sprockets. They list their stuff for 88-10 so I'm guessing the sprockets are for the pregen. __________________________________________________ The www.ModMy250.com guy

March 1st, 2011, 07:42 PM	#6
CThunder-blue ModMy250.com Name: Tri Location: St, Louis Join Date: Sep 2010 Motorcycle(s): 2009 Ninja 250R, 2005 R6 Posts: A lot.	Well, according to the Supersprox and Vortex websites, the rear sprockets are the same. 42041-0011 is the part number I found off of cheapcycleparts.com and the numbers apply to both a 2005 and a 2009. __________________________________________________ The www.ModMy250.com guy

March 2nd, 2011, 09:33 AM	#7
CThunder-blue ModMy250.com Name: Tri Location: St, Louis Join Date: Sep 2010 Motorcycle(s): 2009 Ninja 250R, 2005 R6 Posts: A lot.	Yeah, I knew the fronts were different from reading the many threads on here. __________________________________________________ The www.ModMy250.com guy

March 2nd, 2011, 05:31 PM	#8
littledog ninjette.org member Name: Peter Location: Deep South, USA Join Date: Dec 2009 Motorcycle(s): 2009 Special Edition Ninja 250 a good memory, 2011 Suzuki DL 650 the new ride Posts: 131	Between the ??-07 bikes and the 08-11 bikes the rear sprockets are the same. The front sprockets, not exactly the same. BUT the sprocket for the older models does fit and as far as I can tell the very slightly thicker (like 1/2 mm) new model one is made of unobtanium.

March 3rd, 2011, 11:00 AM	#9
KGar Mid Life Crisis Name: Ken Location: Phoenix, Arizona Join Date: Feb 2011 Motorcycle(s): 2010 Ninja 250r (Passion Red); 1999 BMW K1200RS (Marrakesh Red) Posts: 81	In regards to rear sprockets,is there a benefit to alloy over steel? weight? wear?

March 3rd, 2011, 11:15 AM	#10
Alex ninjette.org dude Name: 1 guess :-) Location: SF Bay Area Join Date: Jun 2008 Motorcycle(s): '13 Ninja 300 (white, the fastest color!), '13 R1200RT, '14 CRF250L, '12 TT-R125LE Posts: Too much. Blog Entries: 7	Aluminum sprockets are lighter, but wear significantly faster. No real benefit for a streetbike. __________________________________________________ Montgomery Street Motorcycle Club / cal24.com / crf250l.org / ninjette.org ninjette.org Terms of Service Shopping for motorcycle parts or equipment? Come here first. The friendliest Ninja 250R/300/400 forum on the internet! (especially Unregistered)

March 3rd, 2011, 11:27 AM	#11
KGar Mid Life Crisis Name: Ken Location: Phoenix, Arizona Join Date: Feb 2011 Motorcycle(s): 2010 Ninja 250r (Passion Red); 1999 BMW K1200RS (Marrakesh Red) Posts: 81	Oh well, I just realized that the JT 43t sprocket I ordered from Tucker Rocky is alloy and it should be here tommorow. I should have paid more attention when I ordered it. I will post how long it last and go back to steel from there.

March 3rd, 2011, 12:34 PM	#12
CThunder-blue ModMy250.com Name: Tri Location: St, Louis Join Date: Sep 2010 Motorcycle(s): 2009 Ninja 250R, 2005 R6 Posts: A lot.	It would be interesting to see how long it takes to wear the AL sprocket. I was actually concerned with the teeth breaking off, but with such a low HP bike, I don't think that's a real issue. I went with a Drive Systems superlite rear sprocket. Made of Steel and supposed to be as light as a supersprox. I almost bought a supersprox until I read some not so favorable reviews on them. Also picked up a Driven front sprocket from fatbikez for $22 shipped . Ordered up a DID chain as well. __________________________________________________ The www.ModMy250.com guy

March 3rd, 2011, 01:06 PM	#13
KGar Mid Life Crisis Name: Ken Location: Phoenix, Arizona Join Date: Feb 2011 Motorcycle(s): 2010 Ninja 250r (Passion Red); 1999 BMW K1200RS (Marrakesh Red) Posts: 81	I got the 15t front for $18 and the rear 43t was $46. I just hope I get a few hundred miles out of the alloy but like you said these bikes do not have much hp.

March 3rd, 2011, 03:00 PM	#14
CThunder-blue ModMy250.com Name: Tri Location: St, Louis Join Date: Sep 2010 Motorcycle(s): 2009 Ninja 250R, 2005 R6 Posts: A lot.	Yeah, the JT's are cheaper, but it's difficult to know which one is the right one. Lots of info stating one way or the other. The driven has at least one person who says that there are no shims needed for it. I don't mind the extra $5 since if it needed shims, that's additional cost and time needed. __________________________________________________ The www.ModMy250.com guy

March 4th, 2011, 07:18 PM	#15
CThunder-blue ModMy250.com Name: Tri Location: St, Louis Join Date: Sep 2010 Motorcycle(s): 2009 Ninja 250R, 2005 R6 Posts: A lot.	argh, Driven sprocket is on back order until the end of the month. __________________________________________________ The www.ModMy250.com guy

March 8th, 2011, 12:09 PM	#16
KGar Mid Life Crisis Name: Ken Location: Phoenix, Arizona Join Date: Feb 2011 Motorcycle(s): 2010 Ninja 250r (Passion Red); 1999 BMW K1200RS (Marrakesh Red) Posts: 81	Installed the 43t alloy last night which now gives me a 15/43. Cruising in to work this morning at 80 in the diamond lane was so nice! I still had power to enter the freeway comfortably without lugging. Feels like I can actually use first gear now, before it was a joke. I do love this set up. OBTW the weight diff between steel and alloy is incredible, and the bright color looks awesome surrounded by all of that black.

March 8th, 2011, 02:09 PM	#20
CThunder-blue ModMy250.com Name: Tri Location: St, Louis Join Date: Sep 2010 Motorcycle(s): 2009 Ninja 250R, 2005 R6 Posts: A lot.	I was being generous! __________________________________________________ The www.ModMy250.com guy

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