Yamaha G9(?) Rear end input shaft splines. What sprocket will work?

HyperMotive Racing · 10-13-2010, 06:18 AM

I'm planning a bike engine install, and have been browsing the threads. I have a Yamaha rear, but no clutch/pulley and am wondering if anyone knows what will work with the input shaft splines? Is there a certain motorcycle/ATV manufacturers countershaft sprocket that will slip right on.? An adapter of some sort? I have fabrication means, just need to find something that will fit the splines. Thanks in advance!

rib33024 · 10-13-2010, 08:34 AM

Welcome to BGW

Some thing like this

sprocket

http://www.denniskirk.com/jsp/produc...d=0872911&mmy=

http://www.denniskirk.com/jsp/produc...eafCatId=11208

http://www.buggiesgonewild.com/golf-...cket-assy.html

http://www.buggiesgonewild.com/big-b...-sprocket.html

http://www.buggiesgonewild.com/desig...ferential.html

HyperMotive Racing · 10-13-2010, 09:17 AM

Thanks Rib, just what I was looking for.

I had thought about the machined hub idea, but didn't trust the cast aluminum to hold the turbo'd 1000 kawi engine thats going to be in it...

rib33024 · 10-13-2010, 12:51 PM

Yeah I didn't think that cast aluminum looked that strong.

here's another one.

http://www.buggiesgonewild.com/bike-...-go-build.html

HyperMotive Racing · 10-13-2010, 01:50 PM

I did see that, but wasn't ready to ASSume that the ez's and yamaha rears use the same spline input shaft.

So I guess that means that you are saying they are the same? Do the clutches interchange?

smallblock450sl · 10-13-2010, 06:37 PM

Mines still in the box,not doing me anygood. 50.00 plus 4.75 shipping. All I can tell you is whats on the gear, "martin 50btb16 1610" and it fits the splines on a Yamaha input shaft. I will also add, the splined section seems to be from the original Yamaha spring seat, witch is aluminum. Good luck on your build.

HyperMotive Racing · 10-20-2010, 06:41 AM

Thanks for the offer Smallblock, I might have to take you up on it.

I'm still searching for an answer. The input shaft is a 19 spline unit, 24.6mm in dia. Does ANYONE have any idea what sprocket would work? Short of getting another reversing rear to use

, i'm running out of options for my build.

reece11` · 12-21-2010, 09:53 PM

Quote:

Originally Posted by HyperMotive Racing

Thanks for the offer Smallblock, I might have to take you up on it.

I'm still searching for an answer. The input shaft is a 19 spline unit, 24.6mm in dia. Does ANYONE have any idea what sprocket would work? Short of getting another reversing rear to use

, i'm running out of options for my build.

+1

anyone?

HyperMotive Racing · 12-22-2010, 06:37 AM

I had no luck. I bought the 'machined hub' sprocket from smallblock. It literally is the center hub from a stock drive clutch machined to fit a machine spur gear. With the proper parts, any machine shop with a lathe should be able to help you out. Good luck!

Mikesn31 · 02-20-2012, 02:32 AM

OMFG! Okay I might be over reacting a bit but I believe I might of found a way to install a sprocket to the Yamaha input shaft. Sorry this is a long post... EZGO uses a 19 spline coupler that couples the motor to the differential, I hope to god this is the same, I'll be ordering one and if it does fit the Yamaha splines I'll weld a small sprocket from a CBR 600 bike engine (525 chain) to this coupler. I chose this sprocket cause the hole in the center is bigger than the 24.6mm Yamaha input shaft that way I don have to grind it out. I'll keep you all updated with pictures. I will also be supporting the shaft with a pillow block bearing 20mm (I freaking love eBay)!! Type in google search "ezgo 19 spline coupling" and prepare to unzip!

10-13-2010, 06:18 AM	#1
HyperMotive Racing Getting Wild Join Date: Oct 2010 Location: York, PA Posts: 141	Yamaha G9(?) Rear end input shaft splines. What sprocket will work? I'm planning a bike engine install, and have been browsing the threads. I have a Yamaha rear, but no clutch/pulley and am wondering if anyone knows what will work with the input shaft splines? Is there a certain motorcycle/ATV manufacturers countershaft sprocket that will slip right on.? An adapter of some sort? I have fabrication means, just need to find something that will fit the splines. Thanks in advance!

10-13-2010, 08:34 AM	#2
rib33024 ...................... Join Date: Apr 2009 Location: FT Lauderdale FL. Posts: 16,416	Re: Yamaha G9(?) Rear end input shaft splines. What sprocket will work? Welcome to BGW Some thing like this sprocket http://www.denniskirk.com/jsp/produc...d=0872911&mmy= http://www.denniskirk.com/jsp/produc...eafCatId=11208 http://www.buggiesgonewild.com/golf-...cket-assy.html http://www.buggiesgonewild.com/big-b...-sprocket.html http://www.buggiesgonewild.com/desig...ferential.html

10-13-2010, 09:17 AM	#3
HyperMotive Racing Getting Wild Join Date: Oct 2010 Location: York, PA Posts: 141	Re: Yamaha G9(?) Rear end input shaft splines. What sprocket will work? Thanks Rib, just what I was looking for. I had thought about the machined hub idea, but didn't trust the cast aluminum to hold the turbo'd 1000 kawi engine thats going to be in it...

10-13-2010, 12:51 PM	#4
rib33024 ...................... Join Date: Apr 2009 Location: FT Lauderdale FL. Posts: 16,416	Re: Yamaha G9(?) Rear end input shaft splines. What sprocket will work? Yeah I didn't think that cast aluminum looked that strong. here's another one. http://www.buggiesgonewild.com/bike-...-go-build.html

10-13-2010, 01:50 PM	#5
HyperMotive Racing Getting Wild Join Date: Oct 2010 Location: York, PA Posts: 141	Re: Yamaha G9(?) Rear end input shaft splines. What sprocket will work? I did see that, but wasn't ready to ASSume that the ez's and yamaha rears use the same spline input shaft. So I guess that means that you are saying they are the same? Do the clutches interchange?

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10-20-2010, 06:41 AM	#7
HyperMotive Racing Getting Wild Join Date: Oct 2010 Location: York, PA Posts: 141	Re: Yamaha G9(?) Rear end input shaft splines. What sprocket will work? Thanks for the offer Smallblock, I might have to take you up on it. I'm still searching for an answer. The input shaft is a 19 spline unit, 24.6mm in dia. Does ANYONE have any idea what sprocket would work? Short of getting another reversing rear to use, i'm running out of options for my build.

12-22-2010, 06:37 AM	#9
HyperMotive Racing Getting Wild Join Date: Oct 2010 Location: York, PA Posts: 141	Re: Yamaha G9(?) Rear end input shaft splines. What sprocket will work? I had no luck. I bought the 'machined hub' sprocket from smallblock. It literally is the center hub from a stock drive clutch machined to fit a machine spur gear. With the proper parts, any machine shop with a lathe should be able to help you out. Good luck!

02-20-2012, 02:32 AM	#10
Mikesn31 Gone Wild Join Date: Feb 2011 Posts: 206	OMFG! Okay I might be over reacting a bit but I believe I might of found a way to install a sprocket to the Yamaha input shaft. Sorry this is a long post... EZGO uses a 19 spline coupler that couples the motor to the differential, I hope to god this is the same, I'll be ordering one and if it does fit the Yamaha splines I'll weld a small sprocket from a CBR 600 bike engine (525 chain) to this coupler. I chose this sprocket cause the hole in the center is bigger than the 24.6mm Yamaha input shaft that way I don have to grind it out. I'll keep you all updated with pictures. I will also be supporting the shaft with a pillow block bearing 20mm (I freaking love eBay)!! Type in google search "ezgo 19 spline coupling" and prepare to unzip!
Mikesn31 Gone Wild Join Date: Feb 2011 Posts: 206

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