Need help figuring out what is wrong with my HSUN 200GY

pizzarider · 05-01-2009, 02:42 AM

The other day I was riding at around 60mph in 5th gear when all of a sudden it sounded like my engine got louder (I actually thought the manifold came off) and had a loud clank sound. I decelerated, and looked down to make sure my exhaust was on. Everything looked fine so I accelerated with the noise to try to find a place to pull over when my bike totally shut off. When I kick the kick start you can hear a weard whiney fast clanking. I thought that maybe the piston or rod shattered but The bike isnt locked up at all. I can switch gears and everything but just can't start it. Also, I took the right side panel off to check and when I went to put the panel back on I couldnt get the clutch ejector pin to function right. Is there a trick to putting this pin back in? Thanks for your help guys and gals! -Cory

czowner · 05-01-2009, 04:15 AM

Cory,
I can't help with the pin as my Hongdou has a different arangement. Regarding the noise and non starting I would be looking at top of the engine (valves, piston etc.) not the bottom. The first simple check to do is a compresion test, this post covers covers it: http://www.chinariders.net/modules.p...ewtopic&t=7807
If you don't have access to a compression guage to get a rough guide stick your thumb over the spark plug hole then kick the motor over, (may need an assistant here), make sure that the plug lead is grounded as the CDI may get damaged if it's not.

Jonathan.

katoranger · 05-01-2009, 09:11 AM

Check compression. Sounds like you may have had an internal engine component failure.

Drain the oil and check for any broken metal bits too.

Report back with your findings.

Allen

FastDoc · 05-01-2009, 11:26 AM

Sorry to hear about that, PizzaRider. Your posts and success with your GY were instrumental in my buying one. I hope it's an easy fix. How many miles do you have now? Of course, even Japanese bikes fail, but it did seem like ChinaBike engine/transmission failures were fairly rare. That may have been because most of our bikes are still fairly new.

I'm up to about 700 miles on my HSUN, 99% off road...

SeerAtlas · 05-01-2009, 12:51 PM

Hmmm, not good. I'd second the compression check, and the oil inspection. If compression checks good, and no bits in the oil, take a look at the exhaust gas emissions system and see if something has come apart there.

From your description, however, sounds like something let loose inside :(

seer

katoranger · 05-01-2009, 01:19 PM

I really don't want to say it but it sounds like the piston siezed and the rod let loose.

I think the whiney sound is the crank spinning around with alittle bit of the rod attached. When you kick it around does it feel like there is any resistance?

Allen

TeamCheap · 05-01-2009, 04:26 PM

Well if it is the engine and out of.......dare I say it "warranty" that is a simple and inexspensive repair since a new engine can be bought for $200+ to $550 or so.
(Just depends on where you find it)

FastDoc · 05-01-2009, 04:54 PM

Would a 200cc JetMoto engine be the same? Lifanoid?

BUG · 05-01-2009, 05:19 PM

I had a Honda OHV engine on a pressure washer that sounded the exact same way when it died. When i took it apart the casting that holds a pin for the rocker had broken holding the exhaust valve in a semi open position.

How did you get your Hsun to go 60mph?

TeamCheap · 05-01-2009, 05:21 PM

Quote:

Originally Posted by FastDoc

Would a 200cc JetMoto engine be the same? Lifanoid?

I dont know if they'd be the same but there aren't to many differences between most of these engines.

But research is the best way to go, you know first find out exactly what you have and then go looking for the same/similar engine and go from there.

I put an OHC in mine since it came stock with a pushrod engine, I just wanted to see if there was much of a difference (there isnt really) and it bolted/plugged in the same as stock but there are other engine layouts out there so its best to compare before actually buying.

FastDoc · 05-01-2009, 05:28 PM

A guy is selling a 2006 JetMoto 200 with 300 some miles in a totalled bike for about $250. Says the motor runs perfect. I could look at it if you like...

elroyjetsn · 05-01-2009, 06:15 PM

The whiney sound and rapid clanking sound like one of the balls in the main bearing broke. If it locked the bearing, the whirring could be the bearing has spun.

My Guess anyway... :?

pizzarider · 05-01-2009, 09:11 PM

Thanks everyone for the replies!!!! I drained the oil and no chunks came out and no bits of metal. Where should I tear into to check the rod and piston? Please keep up the suggestions. I want to try to fix this my self because i think it is fun. As to how I got my bike to 60mph: I just put a 42T rear sprocket on it and broke in the bike the right way. It can reach 64mph. Thanks -Cory

Dragon · 05-01-2009, 09:27 PM

I think they said compression test.

pizzarider · 05-01-2009, 10:05 PM

Ok will be doing compression test tomorrow. I did notice that there is very little resistance when i kick the kick start. -Cory

05-01-2009, 02:42 AM	#1
pizzarider Join Date: Jun 2008 Posts: 144	Need help figuring out what is wrong with my HSUN 200GY The other day I was riding at around 60mph in 5th gear when all of a sudden it sounded like my engine got louder (I actually thought the manifold came off) and had a loud clank sound. I decelerated, and looked down to make sure my exhaust was on. Everything looked fine so I accelerated with the noise to try to find a place to pull over when my bike totally shut off. When I kick the kick start you can hear a weard whiney fast clanking. I thought that maybe the piston or rod shattered but The bike isnt locked up at all. I can switch gears and everything but just can't start it. Also, I took the right side panel off to check and when I went to put the panel back on I couldnt get the clutch ejector pin to function right. Is there a trick to putting this pin back in? Thanks for your help guys and gals! -Cory
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05-01-2009, 09:11 AM	#3
katoranger Join Date: May 2007 Location: Altamont, Kansas Posts: 15,103	Check compression. Sounds like you may have had an internal engine component failure. Drain the oil and check for any broken metal bits too. Report back with your findings. Allen __________________ You meet the nicest people on a Honda Clone.
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05-01-2009, 11:26 AM	#4
FastDoc Join Date: Mar 2009 Location: Southeastern Washington desert Posts: 14,761	Sorry to hear about that, PizzaRider. Your posts and success with your GY were instrumental in my buying one. I hope it's an easy fix. How many miles do you have now? Of course, even Japanese bikes fail, but it did seem like ChinaBike engine/transmission failures were fairly rare. That may have been because most of our bikes are still fairly new. I'm up to about 700 miles on my HSUN, 99% off road... __________________ Happy to serve.
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05-01-2009, 12:51 PM	#5
SeerAtlas Join Date: Apr 2009 Posts: 770	Hmmm, not good. I'd second the compression check, and the oil inspection. If compression checks good, and no bits in the oil, take a look at the exhaust gas emissions system and see if something has come apart there. From your description, however, sounds like something let loose inside :( seer __________________ Seer's First LAW-"FLY THE PLANE!", fail that, and nothing else matters. 12th Law- Consider what marvels you might do if only you had tomorrow to live over again. Third Law-When someone tells you some thing "Can't Be Done", what they're really saying is They can't do it!!14th Law-Just because something "IS", doesn't necessarily mean it SHOULD be.. Eighth Law-The only true personal security is anonymity.Ninth Law-Humans tend to learn very little when speaking.10th Law-Some lives ARE worth taking
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05-01-2009, 01:19 PM	#6
katoranger Join Date: May 2007 Location: Altamont, Kansas Posts: 15,103	I really don't want to say it but it sounds like the piston siezed and the rod let loose. I think the whiney sound is the crank spinning around with alittle bit of the rod attached. When you kick it around does it feel like there is any resistance? Allen __________________ You meet the nicest people on a Honda Clone.
	0

05-01-2009, 04:15 AM	#2
czowner Join Date: Sep 2006 Location: North East England Posts: 313	Cory, I can't help with the pin as my Hongdou has a different arangement. Regarding the noise and non starting I would be looking at top of the engine (valves, piston etc.) not the bottom. The first simple check to do is a compresion test, this post covers covers it: http://www.chinariders.net/modules.p...ewtopic&t=7807 If you don't have access to a compression guage to get a rough guide stick your thumb over the spark plug hole then kick the motor over, (may need an assistant here), make sure that the plug lead is grounded as the CDI may get damaged if it's not. Jonathan.
	0

05-01-2009, 04:26 PM	#7
TeamCheap Join Date: Jun 2006 Location: directly under the earths sun............NOW Posts: 2,302	Well if it is the engine and out of.......dare I say it "warranty" that is a simple and inexspensive repair since a new engine can be bought for $200+ to $550 or so. (Just depends on where you find it)
	0

05-01-2009, 04:54 PM	#8
FastDoc Join Date: Mar 2009 Location: Southeastern Washington desert Posts: 14,761	Would a 200cc JetMoto engine be the same? Lifanoid? __________________ Happy to serve.
	0

05-01-2009, 05:19 PM	#9
BUG Join Date: Nov 2008 Location: United States Posts: 144	I had a Honda OHV engine on a pressure washer that sounded the exact same way when it died. When i took it apart the casting that holds a pin for the rocker had broken holding the exhaust valve in a semi open position. How did you get your Hsun to go 60mph? __________________ 2008 HSUN MDL-200GY 2009 KLR650
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05-01-2009, 05:28 PM	#11
FastDoc Join Date: Mar 2009 Location: Southeastern Washington desert Posts: 14,761	A guy is selling a 2006 JetMoto 200 with 300 some miles in a totalled bike for about $250. Says the motor runs perfect. I could look at it if you like... __________________ Happy to serve.
	0

05-01-2009, 06:15 PM	#12
elroyjetsn Join Date: Mar 2008 Location: West Virginia Posts: 629	The whiney sound and rapid clanking sound like one of the balls in the main bearing broke. If it locked the bearing, the whirring could be the bearing has spun. My Guess anyway... :? __________________ Wayne Wildfire WF300-SP
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05-01-2009, 09:11 PM	#13
pizzarider Join Date: Jun 2008 Posts: 144	Thanks everyone for the replies!!!! I drained the oil and no chunks came out and no bits of metal. Where should I tear into to check the rod and piston? Please keep up the suggestions. I want to try to fix this my self because i think it is fun. As to how I got my bike to 60mph: I just put a 42T rear sprocket on it and broke in the bike the right way. It can reach 64mph. Thanks -Cory
	0

05-01-2009, 09:27 PM	#14
Dragon Join Date: Nov 2007 Location: Tejas Posts: 834	I think they said compression test. __________________ Chinabikeless
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05-01-2009, 10:05 PM	#15
pizzarider Join Date: Jun 2008 Posts: 144	Ok will be doing compression test tomorrow. I did notice that there is very little resistance when i kick the kick start. -Cory
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