What causes low compression in a motorcycle?
Causes include worn, fouled or damaged spark plugs, bad plug wires or even a cracked distributor cap. A weak coil or excessive rotor gas inside a distributor would affect all cylinders, not just a single cylinder. Loss of compression means the cylinder loses most of its air/fuel mixture before it can be ignited.
What makes Harley Davidson XL1200S Sportster Sport Special?
In addition to the high-tech electronics, the Sportster S benefits from a point more compression (a 10.0:1 ratio instead of the standard 1200’s 9.0:1), less restrictive mufflers, and special camshaft profiles.
What’s the compression ratio on a Harley Davidson 883 Sportster?
The heads mate the compact combustion chamber of the 883 Sportster with 1200cc-size valves and better-flowing ports. The combustion chamber yields a 10.0:1 compression ratio and allows quick burning of the mixture, even with a single sparkplug per cylinder; but Harley has given each head (on the 1200S only) two plugs.
What to look for in a 1998 Sportster?
Though the chassis is the same as those used in the first (1996-1997) of the 1200S models, you can immediately identify a ’98 Sport because of its two-spark-plugs-per-cylinder heads and the unique finishes chosen for the engine. The gray spark leads of the dual-plug system are just the tip of the ignition system iceberg.
What’s the compression ratio on a Harley Davidson 1200?
The combustion chamber yields a 10.0:1 compression ratio and allows quick burning of the mixture, even with a single sparkplug per cylinder; but Harley has given each head (on the 1200S only) two plugs. This exemplifies the difference in tuning philosophy between The Motor Company and its Buell division.
Though the chassis is the same as those used in the first (1996-1997) of the 1200S models, you can immediately identify a ’98 Sport because of its two-spark-plugs-per-cylinder heads and the unique finishes chosen for the engine. The gray spark leads of the dual-plug system are just the tip of the ignition system iceberg.
In addition to the high-tech electronics, the Sportster S benefits from a point more compression (a 10.0:1 ratio instead of the standard 1200’s 9.0:1), less restrictive mufflers, and special camshaft profiles.
The combustion chamber yields a 10.0:1 compression ratio and allows quick burning of the mixture, even with a single sparkplug per cylinder; but Harley has given each head (on the 1200S only) two plugs. This exemplifies the difference in tuning philosophy between The Motor Company and its Buell division.
The heads mate the compact combustion chamber of the 883 Sportster with 1200cc-size valves and better-flowing ports. The combustion chamber yields a 10.0:1 compression ratio and allows quick burning of the mixture, even with a single sparkplug per cylinder; but Harley has given each head (on the 1200S only) two plugs.