Compression specs.....
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Cruiser
Joined: May 2009
Posts: 147
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From: San Antonio,TX
Compression specs.....
Can anyone tell me what the cylinder compression specs for a 2000 xl1200c are? I have the haynes repair manual and i cant seem to find it. it tells you how to do the test and it refers to "the specs in this chapter" but i cant friggin find it!!
Outstanding HDF Member
Joined: Aug 2007
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From: Bristol UK
I'll be very suprised if its not included in the Haynes Manual. Possibly its in a table either within the chapter or at the foront or rear of the manual.
However, having done a number of searches in Google for "2000 harley sportster 1200 compression ratio" without the speach marks, I believe the correct ratio for that years model is 9.7:1. However, you may wish to do some similar searches yourself first.
However, having done a number of searches in Google for "2000 harley sportster 1200 compression ratio" without the speach marks, I believe the correct ratio for that years model is 9.7:1. However, you may wish to do some similar searches yourself first.
Club Member
Joined: Feb 2007
Posts: 16,320
Likes: 306
From: Boynton Beach, FloriDuh
I'll be very suprised if its not included in the Haynes Manual. Possibly its in a table either within the chapter or at the foront or rear of the manual.
However, having done a number of searches in Google for "2000 harley sportster 1200 compression ratio" without the speach marks, I believe the correct ratio for that years model is 9.7:1. However, you may wish to do some similar searches yourself first.
However, having done a number of searches in Google for "2000 harley sportster 1200 compression ratio" without the speach marks, I believe the correct ratio for that years model is 9.7:1. However, you may wish to do some similar searches yourself first.
Here are the numbers from an 04 Service manual, they should be close.
883cc - 125-140 psi
1200cc- 200-225 psi
With no more than a 10% difference between cylinders.
Outstanding HDF Member
Joined: Aug 2007
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From: Bristol UK
cHarley is without a shadow of a doubt the expert in comparison with me, so ignore what I said above.
I've just about mastered filling the perol tank, but still struggle with paying for the fuel. You can laugh, but its roughly $8.30 USD a gallon over here.
I've just about mastered filling the perol tank, but still struggle with paying for the fuel. You can laugh, but its roughly $8.30 USD a gallon over here.
Club Member
Joined: Feb 2007
Posts: 16,320
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From: Boynton Beach, FloriDuh
OUCH .........
Road Master
Joined: Jun 2009
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From: Indianapolis
Aren't the motors different between a 2000 and 2004? I thought that they changed in 2003?
Club Member
Joined: Feb 2007
Posts: 16,320
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From: Boynton Beach, FloriDuh
Yes, the 04 got the Buell Thunderstorm heads, but I believe the compression ratio, 9.7-1 is the same, so the psi should be in the same ballpark.
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Tourer
Joined: Jul 2009
Posts: 341
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My 01 1200 custom with stock heads 67cc and pistons had a compression of 150 psi with D cams. Then I put SE heads 62cc on it and with D cams compression was 170 psi. Then I installed W cams and compression was 190 psi.
At 1250cc, 10.5-1 pistons and with stock SE heads 62cc and 536 cams compression was 205 psi. With ported SE heads with 64 cc chambers now and 536 cams the compression is 195 psi.
Hope this helps
At 1250cc, 10.5-1 pistons and with stock SE heads 62cc and 536 cams compression was 205 psi. With ported SE heads with 64 cc chambers now and 536 cams the compression is 195 psi.
Hope this helps
Last edited by RacingJake; Apr 20, 2010 at 03:17 PM.
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Grand HDF Member
Joined: Sep 2007
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From: Boise Idaho
This is start from Harley's repair manual, the bike has 9.0-1 compression. Checking compression with compression gauge the cylinders should both read over 120 and be with in 10LBS's of each other.
You guys with the newer Sporties need to stop GUESSING at what the specs are for the older bikes.
You guys with the newer Sporties need to stop GUESSING at what the specs are for the older bikes.