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05-01-2009, 02:42 AM | #1 |
Join Date: Jun 2008
Posts: 144
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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, 04:15 AM | #2 |
Join Date: Sep 2006
Location: North East England
Posts: 313
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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. |
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05-01-2009, 09:11 AM | #3 |
Join Date: May 2007
Location: Altamont, Kansas
Posts: 15,103
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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
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05-01-2009, 11:26 AM | #4 |
Join Date: Mar 2009
Location: Southeastern Washington desert
Posts: 14,761
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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...
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05-01-2009, 12:51 PM | #5 |
Join Date: Apr 2009
Posts: 770
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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
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05-01-2009, 01:19 PM | #6 |
Join Date: May 2007
Location: Altamont, Kansas
Posts: 15,103
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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
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05-01-2009, 04:26 PM | #7 |
Join Date: Jun 2006
Location: directly under the earths sun............NOW
Posts: 2,302
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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) |
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05-01-2009, 04:54 PM | #8 |
Join Date: Mar 2009
Location: Southeastern Washington desert
Posts: 14,761
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Would a 200cc JetMoto engine be the same? Lifanoid?
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05-01-2009, 05:19 PM | #9 |
Join Date: Nov 2008
Location: United States
Posts: 144
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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?
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05-01-2009, 05:21 PM | #10 | |
Join Date: Jun 2006
Location: directly under the earths sun............NOW
Posts: 2,302
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Quote:
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. |
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05-01-2009, 05:28 PM | #11 |
Join Date: Mar 2009
Location: Southeastern Washington desert
Posts: 14,761
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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...
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05-01-2009, 06:15 PM | #12 |
Join Date: Mar 2008
Location: West Virginia
Posts: 629
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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... :?
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05-01-2009, 09:11 PM | #13 |
Join Date: Jun 2008
Posts: 144
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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
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05-01-2009, 09:27 PM | #14 |
Join Date: Nov 2007
Location: Tejas
Posts: 834
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I think they said compression test.
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05-01-2009, 10:05 PM | #15 |
Join Date: Jun 2008
Posts: 144
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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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