05-18-2013, 03:51 PM
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#2 |
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Senior Member
Join Date: Nov 2008
Location: Tenerife (Spain)
Posts: 3,715
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Re: Opened my Engine and this is what I found
Looks like two valves completely disintigrated.
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By birth an Englishman, by the grace of God a Yorkshireman. |
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05-18-2013, 04:25 PM
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#3 |
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Junior Member
Join Date: May 2013
Location: Florida
Posts: 17
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Re: Opened my Engine and this is what I found
Yes sir, both exhaust valves gone
I am going to order a new piston and valves but this is my only mode of transportation So do you think it can run without the exhaust valves? Login or Register to Remove Ads |
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05-18-2013, 05:01 PM
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#4 | |
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Senior Member
Join Date: Nov 2008
Location: Tenerife (Spain)
Posts: 3,715
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Re: Opened my Engine and this is what I found
Quote:
BTW....This isn't something that "just happens". There has to be a cause. Usuallly a timing problem. You need to check the timing chain etc.
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By birth an Englishman, by the grace of God a Yorkshireman. |
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05-18-2013, 05:08 PM
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#5 |
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Senior Member
Join Date: Feb 2010
Location: P.E.I. Canada
Posts: 3,784
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Re: Opened my Engine and this is what I found
The head looks like it is damaged beyond repair.You may be better off looking for a good used engine.
 :cool:
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If at first you do succeed, try not to look surprised. 
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05-18-2013, 06:21 PM
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#6 |
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Senior Member
Join Date: Dec 2006
Location: Squamish B.C Canada
Posts: 11,409
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Re: Opened my Engine and this is what I found
Ouch! That looks like a good candidate for an engine replacement. I noticed you are from a warm climate. Do you regularly run wide open throttle? A combo of high speeds and hot weather would certainly be an engine killer.
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05-18-2013, 11:29 PM
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#7 | |
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Senior Member
Join Date: Mar 2012
Location: Westofhell
Posts: 177
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Re: Opened my Engine and this is what I found
Quote:
I have seen that happen before, on a different air-cooled engine, twice. No, luckily they weren't mine. The first time saw it, it was caused by the exhaust valves being set WAY too far open. The second time, the dummy had removed the exhaust system except for a short, straight, pipe. Didn't it give ANY warning signs before it died? |
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05-19-2013, 12:05 AM
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#8 |
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Junior Member
Join Date: May 2013
Location: Florida
Posts: 17
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Re: Opened my Engine and this is what I found
I recently had a couple gaskets replaced and if I allow it to idle too long, the exhaust pipes would glow red hot
Which I suspect was causing the valves to burn red as well which is probably why they snapped. Yes, I am in Florida, |
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05-19-2013, 12:28 PM
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#9 |
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Senior Member
Join Date: Jan 2009
Location: Louisville, TN
Posts: 1,413
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Re: Opened my Engine and this is what I found
Well, it's no TIMEX.
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Jerry Truth is there are lots of great bikes available and not nearly as many good riders out there riding them... "A man's got to know his limitations..." |
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05-19-2013, 02:22 PM
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#10 |
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Senior Member
Join Date: Apr 2013
Location: Danmark
Posts: 140
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Re: Opened my Engine and this is what I found
I have seen the same on to engines on my own chinabike
 and the only diference is that my Jinlun was a 150ccm with only one exhaust valve :skull: So I feel you! RIP to that cylindertop piston and valves!!!
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