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The speedo on my '05 Sportster 4-TEC reads about 5 mph low in the range between 20 and 30 mph. I know this by having checked the speedo reading several times against a GPS.
Does anyone know if there is a way to adjust the speedo, either on the instrument itself or possibly on the little paddle-wheel sender unit?
Thanks --
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Why new spark plugs every year?
22 April 2007 - 08:16 PM
I've just purchased an '05 Sportster 4-TEC with 47 hours on the engine. Everything looks like new.
In reading through the owner's manual, I noticed the recommendation to install new spark plugs every season, which baffled me. Why would that be necessary, especially given that the 4-TEC is a four-stroke engine? The spark plugs in car engines now routinely go 30 - 50 - even 100,000 miles before they need to be replaced, and that's a whole lot more hours than I'll use this little boat in one season.
Does anyone know the reason for this ultra-short replacement interval?
In reading through the owner's manual, I noticed the recommendation to install new spark plugs every season, which baffled me. Why would that be necessary, especially given that the 4-TEC is a four-stroke engine? The spark plugs in car engines now routinely go 30 - 50 - even 100,000 miles before they need to be replaced, and that's a whole lot more hours than I'll use this little boat in one season.
Does anyone know the reason for this ultra-short replacement interval?
