New Rear Sprocket

chinaguy · 07-14-2008, 10:16 PM

I need to adjust the rear sprocket on my '08 HSUN GY 200 to allow a bit higher top speed. It is geared very low - almost too low for street use.

Does anyone know what the stock sprocket size is? 46 tooth, 56 tooth?

I want to keep the stock chain for now, I believe it is a 428.

What size rear sprocket would allow a top speed of 65 mph or so?

Any ideas on where to get a smaller rear sprocket that will fit?

Jim · 07-14-2008, 10:48 PM

If you look at the sprocket it may have the tooth count stamped into it, mine does anyways...

kens97sto171 · 07-15-2008, 04:56 AM

I got my 46t rear sproket from Bruce at EJ Cycles.

I can run 65-70 no problem... This was the single BIGGEST positive thing I did to the bike. I should have done it right after I got the bike. I can run 60-65MPH at 25-30% throttle now.. instead of WOT. I actually would like to go a little smaller on the rear... a 42 is popular, but Bruce said he was out when I called... A 40t would also work.. you WILL need to cut your chain down. Be care full I cut too many links out and had to use a second master link to fix it temporarily.

Bruce's number is
330-274-0098

http://www.endlessjourneycycles.net/

katoranger · 07-15-2008, 07:59 AM

You probably have a 56T rear. Go to a 46-40T rear to get that speed. You will need to remove about 4 links from the chain.

Allen

chinaguy · 07-15-2008, 09:02 AM

Quote:

Originally Posted by Jim

If you look at the sprocket it may have the tooth count stamped into it, mine does anyways...

By darn, it is stamped "56" right on the sprocket. Thanks!

Looks like I need to go to about a 46 or so. Thanks for all the help!

BW · 07-15-2008, 10:02 AM

If you have a 15 go to a 17. 2 teeth on the front = 6 on the rear.
Cheaper and much easier to change. And you can swap back and forth.

Found mine on Ebay for 12 and shipping.

chinaguy · 07-15-2008, 02:07 PM

Quote:

Originally Posted by BW

If you have a 15 go to a 17. 2 teeth on the front = 6 on the rear.
Cheaper and much easier to change. And you can swap back and forth.

Found mine on Ebay for 12 and shipping.

That's interesting and sounds like a good idea. How has that affected the top speed on your bike?

Any link to the e- bay site?

BW · 07-16-2008, 08:37 AM

http://cgi.ebay.com/ebaymotors/428-1...spagenameZWDVW

Search for "17 front sprocket"

Brainsquishy · 07-16-2008, 03:45 PM

I have the same bike. My front sproket is a 17.
I put a 42 on the back (original was the 56) and I can hit 73-75mph without the air filter and jet mods.

metcalfguitars · 07-16-2008, 05:43 PM

With a 17/42 how is torque up a hill? Do you need to down shift at 60mph on moderate hills? I put a 49 on my Shineray and can get 65 on level and a tailwind and I weigh 250lbs. I get 55 at 90% throttle but still don't have the torque I'd like to see. I have a pod filter and main jet to put on as time permits.

Tim

Brainsquishy · 07-16-2008, 08:00 PM

Quote:

Originally Posted by metcalfguitars

With a 17/42 how is torque up a hill? Do you need to down shift at 60mph on moderate hills? I put a 49 on my Shineray and can get 65 on level and a tailwind and I weigh 250lbs. I get 55 at 90% throttle but still don't have the torque I'd like to see. I have a pod filter and main jet to put on as time permits.

Tim

The bike will hold its own up a moderate hill without a head wind, but I need to go WOT to do it. It will accelerate up if in 4th and take on a bit more of a hill. I am 200Lbs and 6'1". I find that my new windshield helps the aerodynamics. No chest plow. Transports don't scare me anymore coming towards me at 100 km/hr. It DOES need more power though. The Pod and Jet "should" do that for me... I hope.

chinaguy · 07-17-2008, 12:52 PM

I was at the dealer today and I ordered a new 48 tooth sprocket for the rear, along with a new carb jet. I'm just trying to keep up with rest of you guys! :mrgreen:

Squishy: I'm really diggin' that windscreen!

Brainsquishy · 07-17-2008, 01:03 PM

Fun, Eh!

theENIGMATIC · 07-17-2008, 01:46 PM

What kind of sprocket did you put on and where did you get it Squish?
Thanks!

Brainsquishy · 07-17-2008, 02:19 PM

I got it from the Barrie, ON Honda Powerhouse www.barriehonda.com 1-800-267-4449 powerparts@barriehonda.com. But I think any dealer can get one in your local area.

JTSprocket 324-8702 (42Tooth Rear Sprocket)

They also tell me the JTSprocket 324-8720 is a 45Tooth Rear Sprocket that fits the same bike.

These where cross referenced against the Honda XL 100S (years 1977-78)

If I may make a suggestion, I would have gotten the 4 little studs at the same time and put them on the sprocket before I started. Moving them from the original 56T to the new 42T was a bit of a pain.

I had to remove 4 links from the chain (caveman style) and I have a 17T front sprocket.

07-14-2008, 10:16 PM	#1
chinaguy Join Date: Jun 2008 Location: Central Pennsylvania Posts: 125	New Rear Sprocket I need to adjust the rear sprocket on my '08 HSUN GY 200 to allow a bit higher top speed. It is geared very low - almost too low for street use. Does anyone know what the stock sprocket size is? 46 tooth, 56 tooth? I want to keep the stock chain for now, I believe it is a 428. What size rear sprocket would allow a top speed of 65 mph or so? Any ideas on where to get a smaller rear sprocket that will fit?
	0

07-14-2008, 10:48 PM	#2
Jim Join Date: Mar 2007 Location: Abbotsford, BC, Canada Posts: 4,880	If you look at the sprocket it may have the tooth count stamped into it, mine does anyways... __________________ "Be excellent to each other" "We are all human. Let's start to prove it!"
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07-15-2008, 07:59 AM	#4
katoranger Join Date: May 2007 Location: Altamont, Kansas Posts: 15,103	You probably have a 56T rear. Go to a 46-40T rear to get that speed. You will need to remove about 4 links from the chain. Allen __________________ You meet the nicest people on a Honda Clone.
	0

07-15-2008, 10:02 AM	#6
BW Join Date: Apr 2008 Location: Florida Posts: 52	Check your front sprocket If you have a 15 go to a 17. 2 teeth on the front = 6 on the rear. Cheaper and much easier to change. And you can swap back and forth. Found mine on Ebay for 12 and shipping.
	0

07-16-2008, 03:45 PM	#9
Brainsquishy Join Date: May 2008 Location: Ontario, Canada Posts: 327	I have the same bike. My front sproket is a 17. I put a 42 on the back (original was the 56) and I can hit 73-75mph without the air filter and jet mods. __________________ Riding a blue plated HSUN 200GY (Otherwise know as a ULIKE 200GY, SUNL 200GY or a VIVA SX200S), a 2010 Gio Mini Hummer 110cc ATV, 2010 Gio T3 Rebel ATV, and a 2002 Kawasaki KLR650, 70cc Katera dirtbike, and a 49cc GIO dirtbike...so far!
	0

07-15-2008, 04:56 AM	#3
kens97sto171 Join Date: Mar 2007 Posts: 193	I got my 46t rear sproket from Bruce at EJ Cycles. I can run 65-70 no problem... This was the single BIGGEST positive thing I did to the bike. I should have done it right after I got the bike. I can run 60-65MPH at 25-30% throttle now.. instead of WOT. I actually would like to go a little smaller on the rear... a 42 is popular, but Bruce said he was out when I called... A 40t would also work.. you WILL need to cut your chain down. Be care full I cut too many links out and had to use a second master link to fix it temporarily. Bruce's number is 330-274-0098 http://www.endlessjourneycycles.net/
	0

07-16-2008, 08:37 AM	#8
BW Join Date: Apr 2008 Location: Florida Posts: 52	http://cgi.ebay.com/ebaymotors/428-1...spagenameZWDVW Search for "17 front sprocket"
	0

07-16-2008, 05:43 PM	#10
metcalfguitars Join Date: Jun 2008 Posts: 13	With a 17/42 how is torque up a hill? Do you need to down shift at 60mph on moderate hills? I put a 49 on my Shineray and can get 65 on level and a tailwind and I weigh 250lbs. I get 55 at 90% throttle but still don't have the torque I'd like to see. I have a pod filter and main jet to put on as time permits. Tim __________________ Your mileage may vary... Shineray Allroad DB-200C
	0

07-17-2008, 12:52 PM	#12
chinaguy Join Date: Jun 2008 Location: Central Pennsylvania Posts: 125	I was at the dealer today and I ordered a new 48 tooth sprocket for the rear, along with a new carb jet. I'm just trying to keep up with rest of you guys! :mrgreen: Squishy: I'm really diggin' that windscreen!
	0

07-17-2008, 01:03 PM	#13
Brainsquishy Join Date: May 2008 Location: Ontario, Canada Posts: 327	Fun, Eh! __________________ Riding a blue plated HSUN 200GY (Otherwise know as a ULIKE 200GY, SUNL 200GY or a VIVA SX200S), a 2010 Gio Mini Hummer 110cc ATV, 2010 Gio T3 Rebel ATV, and a 2002 Kawasaki KLR650, 70cc Katera dirtbike, and a 49cc GIO dirtbike...so far!
	0

07-17-2008, 01:46 PM	#14
theENIGMATIC Join Date: Feb 2008 Posts: 392	What kind of sprocket did you put on and where did you get it Squish? Thanks!
	0

07-17-2008, 02:19 PM	#15
Brainsquishy Join Date: May 2008 Location: Ontario, Canada Posts: 327	I got it from the Barrie, ON Honda Powerhouse www.barriehonda.com 1-800-267-4449 powerparts@barriehonda.com. But I think any dealer can get one in your local area. JTSprocket 324-8702 (42Tooth Rear Sprocket) They also tell me the JTSprocket 324-8720 is a 45Tooth Rear Sprocket that fits the same bike. These where cross referenced against the Honda XL 100S (years 1977-78) If I may make a suggestion, I would have gotten the 4 little studs at the same time and put them on the sprocket before I started. Moving them from the original 56T to the new 42T was a bit of a pain. I had to remove 4 links from the chain (caveman style) and I have a 17T front sprocket. __________________ Riding a blue plated HSUN 200GY (Otherwise know as a ULIKE 200GY, SUNL 200GY or a VIVA SX200S), a 2010 Gio Mini Hummer 110cc ATV, 2010 Gio T3 Rebel ATV, and a 2002 Kawasaki KLR650, 70cc Katera dirtbike, and a 49cc GIO dirtbike...so far!
	0