'90 FLHS Compression Test
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Cruiser
Joined: Jul 2007
Posts: 132
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From: Connecticut
'90 FLHS Compression Test
Opening this question to all. I've got a '90 FLHS, and I'm going to be doing a compression test on her.
16K miles, engine is in good shape, so I'm curious. What should I be looking for numbers?
Thanks in advance!
16K miles, engine is in good shape, so I'm curious. What should I be looking for numbers?
Thanks in advance!
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Cruiser
Joined: Jul 2007
Posts: 132
Likes: 1
From: Connecticut
RE: '90 FLHS Compression Test
Jake, as far as I"m aware, the motor's stock (I know I haven't done anything to it, but I've only had the bike 4 months). Just seem's strange to me that I asked the dealer to do a test recently, and they came back telling me that front/rear was 215 PSI and then bragged how that was "textbook perfect".
I may have larger cams in it, but there's really no way for me to tell without ripping her apart, and I'm not ready for that.
I've opened this question up to alot of folks, and I seem to get back similar numbers... so now I'm confused.
I'm going to do a test myself to see if the reading they gave me is even remotely close.
Thanks!
I may have larger cams in it, but there's really no way for me to tell without ripping her apart, and I'm not ready for that.
I've opened this question up to alot of folks, and I seem to get back similar numbers... so now I'm confused.
I'm going to do a test myself to see if the reading they gave me is even remotely close.
Thanks!
Club Member
Joined: Jun 2007
Posts: 45,429
Likes: 2,898
From: Bedford UK
RE: '90 FLHS Compression Test
ORIGINAL: JakeSabre
Do you have a stock cam in it? If so, 140 per cylinder would be a great number.
Do you have a stock cam in it? If so, 140 per cylinder would be a great number.
I had to stop by as I also have a 1990 FLHS, which I bought new. A bit modified now as you can see.
[IMG]local://upfiles/36102/BA059B1D2B6047E582C19D534B6B0F0A.jpg[/IMG]
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