Compression test
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Stage I
Joined: Apr 2023
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From: Tulare ca.
Compression test
I did compression test 03 dyna front is 130 rear is 90 I was riding and her a banging noise and it starting running horrible I turned around parked bike four hour or so tried to start it it backfired loud as I've heard I cranked it again and loud banging metal on metal type noise it will no longer start.reason for test .any ideas what the problem is
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Joined: Jun 2017
Posts: 5,315
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From: Granville New York
Ever had the cam shoe tensioners looked at? I'd start there and don't try starting it again...its only going to cause more damage than good. Definitely time to pull the cam cover and get a look
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Joined: Sep 2008
Posts: 14,068
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From: San Diego, CA
I did compression test 03 dyna front is 130 rear is 90 I was riding and her a banging noise and it starting running horrible I turned around parked bike four hour or so tried to start it it backfired loud as I've heard I cranked it again and loud banging metal on metal type noise it will no longer start.reason for test .any ideas what the problem is
A compression test of 130/90 is way out of spec... I wouldn't have ridden it after those compression test results.. Next step would have been a leak down test... and then disassembly....
IMHO.... now that you have banging noises.... testing time is over, you need to start disassembling the engine. I would be taking it down to the short block, but suspect you will find your issue before that...
As mentioned, you may find at least part of your problem in the cam chest.... but I suspect there will be more...
Report back what you find....
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