sure it should go faster

ldh22 · 04-20-2010, 02:01 PM

got abit of an issue here guys. i cant seem to get any more than 46mph out of my bike . ive checked the valve clearances and the clutch doesnt seem to be slipping . next im gonna have a fiddle with the carb needle setting. anyone out there got any other sugjestions as to what might be the problem
cheers
lee

FastDoc · 04-20-2010, 02:26 PM

Remind us what bike and what's the gearing.

A factory geared Lifanoid with a 56 rear sprocket will redline in top gear around the speed you are stating.

undertulsa · 04-20-2010, 02:28 PM

I get about 70 max if i push it outta my old 200gy-a with the smaller sprocket think i have a 42, your gonna have to get if you gonna ride on road consistently.

ldh22 · 04-20-2010, 02:36 PM

its a bashan gy125 mate the gearing is 15 tooth front and 56 rear so its 3.73-1 8O so i definately will have to change that
lee

FastDoc · 04-20-2010, 03:55 PM

I'd go with something between a 45 and a 50 on back but since a 200 is only good for 55+/- I'd not expect much more than 50.

Weldangrind · 04-20-2010, 09:07 PM

Yeah, I've been thinking about that today. I wonder what the drop-off point would be for a 125? IOW, how high could one gear the final drive on a 125 before it doesn't have the power to carry the gears? Is there a formula for that?

In the old days, I had a TS100 Suzuki that would scream at 125 km/h, but it was a two-smoke.

Vash · 04-20-2010, 09:18 PM

I'm with FastDoc and W&G, I wouldn't expect a normal 125 cc four-stroke engine to go much faster than 50 mph with the right conditions on flat terrain.

Wild_Alaskan · 04-20-2010, 10:07 PM

my gy-5 could go exactly 60 GPS, the speed read nearly 70

ldh22 · 04-21-2010, 12:25 PM

i have a cg125 out back and that has a 38 rear - 12 front sprocket (3.16-1)and would do about 60 so ill start with a 45 tooth sprocket and go from there
lee

Wild_Alaskan · 04-21-2010, 10:38 PM

i had 17/46 btw i switched to 17/49 for a bit more low end

04-20-2010, 02:01 PM	#1
ldh22 Join Date: Feb 2010 Posts: 49	sure it should go faster got abit of an issue here guys. i cant seem to get any more than 46mph out of my bike . ive checked the valve clearances and the clutch doesnt seem to be slipping . next im gonna have a fiddle with the carb needle setting. anyone out there got any other sugjestions as to what might be the problem cheers lee
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04-20-2010, 02:26 PM	#2
FastDoc Join Date: Mar 2009 Location: Southeastern Washington desert Posts: 14,761	Remind us what bike and what's the gearing. A factory geared Lifanoid with a 56 rear sprocket will redline in top gear around the speed you are stating. __________________ Happy to serve.
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04-20-2010, 02:28 PM	#3
undertulsa Join Date: May 2009 Posts: 219	rear sprocket I get about 70 max if i push it outta my old 200gy-a with the smaller sprocket think i have a 42, your gonna have to get if you gonna ride on road consistently.
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04-20-2010, 03:55 PM	#5
FastDoc Join Date: Mar 2009 Location: Southeastern Washington desert Posts: 14,761	I'd go with something between a 45 and a 50 on back but since a 200 is only good for 55+/- I'd not expect much more than 50. __________________ Happy to serve.
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04-20-2010, 09:07 PM	#6
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	Yeah, I've been thinking about that today. I wonder what the drop-off point would be for a 125? IOW, how high could one gear the final drive on a 125 before it doesn't have the power to carry the gears? Is there a formula for that? In the old days, I had a TS100 Suzuki that would scream at 125 km/h, but it was a two-smoke. __________________ 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
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04-20-2010, 02:36 PM	#4
ldh22 Join Date: Feb 2010 Posts: 49	its a bashan gy125 mate the gearing is 15 tooth front and 56 rear so its 3.73-1 8O so i definately will have to change that lee
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04-20-2010, 09:18 PM	#7
Vash Join Date: Dec 2009 Location: Florida Posts: 37	I'm with FastDoc and W&G, I wouldn't expect a normal 125 cc four-stroke engine to go much faster than 50 mph with the right conditions on flat terrain.
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04-20-2010, 10:07 PM	#8
Wild_Alaskan Join Date: Dec 2009 Location: Alaska Posts: 914	my gy-5 could go exactly 60 GPS, the speed read nearly 70 __________________ Dune buggy build http://chinariders.net/modules.php?n...wtopic&t=14470 400cc lifan build vid: http://youtu.be/20HoU8OK_Y0 other fun: http://tinyurl.com/wildalaskan
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04-21-2010, 12:25 PM	#9
ldh22 Join Date: Feb 2010 Posts: 49	i have a cg125 out back and that has a 38 rear - 12 front sprocket (3.16-1)and would do about 60 so ill start with a 45 tooth sprocket and go from there lee
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04-21-2010, 10:38 PM	#10
Wild_Alaskan Join Date: Dec 2009 Location: Alaska Posts: 914	i had 17/46 btw i switched to 17/49 for a bit more low end __________________ Dune buggy build http://chinariders.net/modules.php?n...wtopic&t=14470 400cc lifan build vid: http://youtu.be/20HoU8OK_Y0 other fun: http://tinyurl.com/wildalaskan
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