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 Post subject: Lost Compression on 1980 TT 500
PostPosted: Sun Jul 30, 2017 10:35 pm 
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Joined: Sun Jul 30, 2017 10:12 pm
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I was kicking over my 1980 TT 500 and it kicked back hard. I then kicked it again and compression was way down, and wouldn't start.
I pulled off the head and re seated the valves. The motor has little miles on it. It looked new inside.
Put it together kicked it over and only 80lbs. with the throttle open. Still won't start.
Any ideas?


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 Post subject: Re: Lost Compression on 1980 TT 500
PostPosted: Mon Jul 31, 2017 8:33 am 
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Joined: Wed Oct 16, 2013 7:00 am
Posts: 1583
Location: Durban, South Africa
Hi Rick and :w. to the forum.
Please add your location to your profile.
I'm not sure I understand your post but if you mean that you are trying to start the bike with the throttle open then that could be part of the problem.
Kick back is often related to ignition timing. Not sure if you have electronic ignition or points.
Lack of compression could be the decompression that is jammed holding the valve slightly open.
:bg:
Kevin


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 Post subject: Re: Lost Compression on 1980 TT 500
PostPosted: Mon Jul 31, 2017 9:28 am 
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kevins wrote:
if you mean that you are trying to start the bike with the throttle open then that could be part of the problem.


Compression readings are taken with throttle wide open.


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 Post subject: Re: Lost Compression on 1980 TT 500
PostPosted: Mon Jul 31, 2017 12:44 pm 
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Mats wrote:
kevins wrote:
if you mean that you are trying to start the bike with the throttle open then that could be part of the problem.


Compression readings are taken with throttle wide open.

:oops: ::L; :oops: ::L;
I wasn't aware of that but now that I reread the post it makes sense.
At only 80lbs I thought Rick was a very skinny guy. :lol: :lol:
:bg:
Kevin


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 Post subject: Re: Lost Compression on 1980 TT 500
PostPosted: Mon Jul 31, 2017 7:31 pm 
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:lol:


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 Post subject: Re: Lost Compression on 1980 TT 500
PostPosted: Wed Aug 09, 2017 1:06 pm 
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kevins wrote:
Not sure if you have electronic ignition or points.


Only points and condenser on TT 500 :th-) .

Buba


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