TMEC GY200 with custom 40 tooth rear sprocket

culcune · 01-26-2013, 12:08 PM

Finally, after a week, my friend, with a little help from me, installed the 40 tooth sprocket and chain (it didn't take a week, it was coordinating around our work schedules). Initially, the best thing that could happen to a TMEC 200 based on a quick blast to the gas station and back. However, will have to wait on a report since it has been raining the last day and a half. Monday will be my regular commute, so that will be the true test.

SpudRider · 01-27-2013, 04:23 AM

Congratulations.

Please let us know how well the custom sprocket performs!

Spud

culcune · 01-27-2013, 02:22 PM

Ok, minor/major snag. 3 of the bolts had broken off the sprocket on install. The 3 remaining bolts started loosening up on my test ride. However, it completely changed the character of the bike while it worked...for the better. Tightened up the 2 working bolts, andgot it home. Bought replacement bolts, hex head type. Put permanent thread lock on the 3 and tightened themdown, hopefully permanently. A friend and I tried to extract the broken ones to no avail. Either find someone or someplace to extract the 3, or buy a new wheel :x

However, like I wrote above, before the issue, it worked extremely well. The speedometer is broken, but it had no problem keeping up with 50 to 55 mph traffic. It did remind me of my '93 Mustang GT in that 5th gear is overdrive (my car came stock with 2.73).

SpudRider · 01-27-2013, 02:29 PM

I'm sorry to hear of the broken bolts, but I'm glad you could ride home to repair them.

I wish you good luck getting the broken bolts extracted. I fear you will have difficulty finding a replacement wheel. :(

Spud

culcune · 01-27-2013, 02:32 PM

Excalibur has a couple parts bikes, so if they haven't sold wheels, they should have one.

Weldangrind · 01-28-2013, 09:59 AM

Search the local tool shops for left-hand drill bits (no, I'm not kidding). Lay the wheel on a flat surface, start a center punch mark in the center of the broken bolt, and slowly begin to drill it out with the drill in reverse, with a bit that is smaller than the bolt diameter. Take care to not break the bit. Have some type of lubricant handy to apply to the bit every few seconds; I use Rapid Tap, but even WD-40 will meet your needs.

The bolts might just begin to back out during the drilling process. If not, use a quality extractor (Easy-out is one brand) and remove the bolts that did not back out upon drilling. Please take pics.

culcune · 01-29-2013, 12:59 AM

Thanks for the tip, Weld, but I don't have the patience, skill, or equipment (my drill is not working, I just pulled it out and it was no go

I ended up ordering a new wheel after going for a run yesterday and having the hub break off the wheel and the chain breaking and wrapping around the hub :? 8O

I am at the point of reusing the stock sprocket and chain on the new wheel and just sellingthe bike. :x

FastDoc · 01-29-2013, 02:05 PM

I'm glad you got home safe.

Sorry to hear about your troubles. I know you were in the market for a CB for a long time I'm sorry that it turned out this way.

SpudRider · 01-29-2013, 03:52 PM

Quote:

Originally Posted by FastDoc

I'm glad you got home safe.

Sorry to hear about your troubles. I know you were in the market for a CB for a long time I'm sorry that it turned out this way.

X2 on all points, Culcune.

Spud

culcune · 01-29-2013, 04:33 PM

It wasn't the bike's fault, other than the crap stock sprocket :evil:

culcune · 03-01-2013, 10:13 PM

Ok, after (relatively) enjoying the 40 tooth rear sprocket, I think I need a new front. The stock one is 17 tooth, so I think a 15 tooth would make 5th gear usable. The TMEC 200 uses the Zongshen 167 FML engine. I am sure we discussed sprockets 6 or 7 years ago, but I don't have the time or patience to search for the thread if someone knows what aftermarket sprockets fit the Zongshen/Lifan engines. I might even remember that they all interchange?

zingshoen · 03-02-2013, 03:31 AM

could you drill through the hub and then choose new bolts? if your drill was working?

gentlemen, is that a possibility? i had a garelli moped where i did that, to go from a 43 to a 22. it depends on the hub, of course.

Weldangrind · 03-02-2013, 12:26 PM

Pretty sure this is it, but you'll have to measure your CS sprocket and confirm: http://www.jtsprockets.com/catalogue/model/5065 I'd drop only one tooth and then evaluate; CS sprockets are cheap.

culcune · 03-02-2013, 02:19 PM

Thanks for the link, Weld. It looks to be the same size (dimension-wise) as some I found on a site called www.buyatvsonline.com when I went to the Chinese bike part sections. I bet the JT would be worth a look. I agree that 16 teeth might be a good start since they are relatively low cost and easy to install. If it still seems like too much overdrive in 5th, then a 15t would probably do the trick.

Weldangrind · 03-03-2013, 11:55 AM

JT makes a decent CS sprocket, and I don't think I've ever paid more than $15 for one.

01-26-2013, 12:08 PM	#1
culcune Join Date: May 2006 Location: Yuma, Arizona Posts: 9,035	TMEC GY200 with custom 40 tooth rear sprocket Finally, after a week, my friend, with a little help from me, installed the 40 tooth sprocket and chain (it didn't take a week, it was coordinating around our work schedules). Initially, the best thing that could happen to a TMEC 200 based on a quick blast to the gas station and back. However, will have to wait on a report since it has been raining the last day and a half. Monday will be my regular commute, so that will be the true test. __________________ "They say that life's a carousel, spinning fast you got to ride it well..." TGB Delivery Scooter 150 TMEC 200 Enduro--carcass is sadly rotting in the backyard
	0

01-27-2013, 04:23 AM	#2
SpudRider Join Date: Jul 2008 Location: Idaho Posts: 25,054	Congratulations. Please let us know how well the custom sprocket performs! Spud __________________ Spud "Never argue with an idiot. He will drag you down to his level, and beat you with experience." Mark Twain 2015 Zongshen ZS250GY-3 (RX3) 2006 Zongshen ZS200GY-2 (Sierra 200) 2005 Honda XR650L 2004 Honda CRF250X 1998 Kawasaki KDX220 Mods made to my Zongshen ZS200GY-2: http://www.chinariders.net/showthread.php?t=6894
	0

01-27-2013, 02:22 PM	#3
culcune Join Date: May 2006 Location: Yuma, Arizona Posts: 9,035	Ok, minor/major snag. 3 of the bolts had broken off the sprocket on install. The 3 remaining bolts started loosening up on my test ride. However, it completely changed the character of the bike while it worked...for the better. Tightened up the 2 working bolts, andgot it home. Bought replacement bolts, hex head type. Put permanent thread lock on the 3 and tightened themdown, hopefully permanently. A friend and I tried to extract the broken ones to no avail. Either find someone or someplace to extract the 3, or buy a new wheel :x However, like I wrote above, before the issue, it worked extremely well. The speedometer is broken, but it had no problem keeping up with 50 to 55 mph traffic. It did remind me of my '93 Mustang GT in that 5th gear is overdrive (my car came stock with 2.73). __________________ "They say that life's a carousel, spinning fast you got to ride it well..." TGB Delivery Scooter 150 TMEC 200 Enduro--carcass is sadly rotting in the backyard
	0

01-27-2013, 02:29 PM	#4
SpudRider Join Date: Jul 2008 Location: Idaho Posts: 25,054	I'm sorry to hear of the broken bolts, but I'm glad you could ride home to repair them. I wish you good luck getting the broken bolts extracted. I fear you will have difficulty finding a replacement wheel. :( Spud __________________ Spud "Never argue with an idiot. He will drag you down to his level, and beat you with experience." Mark Twain 2015 Zongshen ZS250GY-3 (RX3) 2006 Zongshen ZS200GY-2 (Sierra 200) 2005 Honda XR650L 2004 Honda CRF250X 1998 Kawasaki KDX220 Mods made to my Zongshen ZS200GY-2: http://www.chinariders.net/showthread.php?t=6894
	0

01-27-2013, 02:32 PM	#5
culcune Join Date: May 2006 Location: Yuma, Arizona Posts: 9,035	Excalibur has a couple parts bikes, so if they haven't sold wheels, they should have one. __________________ "They say that life's a carousel, spinning fast you got to ride it well..." TGB Delivery Scooter 150 TMEC 200 Enduro--carcass is sadly rotting in the backyard
	0

01-28-2013, 09:59 AM	#6
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	Search the local tool shops for left-hand drill bits (no, I'm not kidding). Lay the wheel on a flat surface, start a center punch mark in the center of the broken bolt, and slowly begin to drill it out with the drill in reverse, with a bit that is smaller than the bolt diameter. Take care to not break the bit. Have some type of lubricant handy to apply to the bit every few seconds; I use Rapid Tap, but even WD-40 will meet your needs. The bolts might just begin to back out during the drilling process. If not, use a quality extractor (Easy-out is one brand) and remove the bolts that did not back out upon drilling. Please take pics. __________________ Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer
	0

01-29-2013, 12:59 AM	#7
culcune Join Date: May 2006 Location: Yuma, Arizona Posts: 9,035	Thanks for the tip, Weld, but I don't have the patience, skill, or equipment (my drill is not working, I just pulled it out and it was no go I ended up ordering a new wheel after going for a run yesterday and having the hub break off the wheel and the chain breaking and wrapping around the hub :? 8O I am at the point of reusing the stock sprocket and chain on the new wheel and just sellingthe bike. :x __________________ "They say that life's a carousel, spinning fast you got to ride it well..." TGB Delivery Scooter 150 TMEC 200 Enduro--carcass is sadly rotting in the backyard
	0

01-29-2013, 02:05 PM	#8
FastDoc Join Date: Mar 2009 Location: Southeastern Washington desert Posts: 14,761	I'm glad you got home safe. Sorry to hear about your troubles. I know you were in the market for a CB for a long time I'm sorry that it turned out this way. __________________ Happy to serve.
	0

01-29-2013, 04:33 PM	#10
culcune Join Date: May 2006 Location: Yuma, Arizona Posts: 9,035	It wasn't the bike's fault, other than the crap stock sprocket :evil: __________________ "They say that life's a carousel, spinning fast you got to ride it well..." TGB Delivery Scooter 150 TMEC 200 Enduro--carcass is sadly rotting in the backyard
	0

03-01-2013, 10:13 PM	#11
culcune Join Date: May 2006 Location: Yuma, Arizona Posts: 9,035	Ok, after (relatively) enjoying the 40 tooth rear sprocket, I think I need a new front. The stock one is 17 tooth, so I think a 15 tooth would make 5th gear usable. The TMEC 200 uses the Zongshen 167 FML engine. I am sure we discussed sprockets 6 or 7 years ago, but I don't have the time or patience to search for the thread if someone knows what aftermarket sprockets fit the Zongshen/Lifan engines. I might even remember that they all interchange? __________________ "They say that life's a carousel, spinning fast you got to ride it well..." TGB Delivery Scooter 150 TMEC 200 Enduro--carcass is sadly rotting in the backyard
	0

03-02-2013, 03:31 AM	#12
zingshoen Join Date: Jun 2009 Location: Brisbane, Queensland, Australia Posts: 648	could you drill through the hub and then choose new bolts? if your drill was working? gentlemen, is that a possibility? i had a garelli moped where i did that, to go from a 43 to a 22. it depends on the hub, of course. __________________ 1971 Garelli Gulp 50cc with open ports and 16 mm Bing Carbie + 1980 Honda XL 223 ZS + 2007 Zongshen LZX200G + DR400SM
	0

03-02-2013, 12:26 PM	#13
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	Pretty sure this is it, but you'll have to measure your CS sprocket and confirm: http://www.jtsprockets.com/catalogue/model/5065 I'd drop only one tooth and then evaluate; CS sprockets are cheap. __________________ Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer
	0

03-02-2013, 02:19 PM	#14
culcune Join Date: May 2006 Location: Yuma, Arizona Posts: 9,035	Thanks for the link, Weld. It looks to be the same size (dimension-wise) as some I found on a site called www.buyatvsonline.com when I went to the Chinese bike part sections. I bet the JT would be worth a look. I agree that 16 teeth might be a good start since they are relatively low cost and easy to install. If it still seems like too much overdrive in 5th, then a 15t would probably do the trick. __________________ "They say that life's a carousel, spinning fast you got to ride it well..." TGB Delivery Scooter 150 TMEC 200 Enduro--carcass is sadly rotting in the backyard
	0

03-03-2013, 11:55 AM	#15
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	JT makes a decent CS sprocket, and I don't think I've ever paid more than $15 for one. __________________ Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer
	0