Question about Harley Davidson XLH 1000 Sportster Motorcycles

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Just bought a 74 ironhead custom chopper. I noticed today that the front cylinder is smoking from the exhaust and a intermitant knock from the front cylinder only when the motor is hot. The motor was completely rebuilt and only took on just over two hundred miles. Has not been broke in yet. I need to check the lifters yet but would that cause the front cylinder to smoke if the lifters were out of adjustment or would it be one of the rings not seating?

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  • Robert Buchholz
    Robert Buchholz Jul 29, 2010

    Thanks, Ill tear it down tomorrow and check out the lifters.

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It depends how load the knock is. If a deep sounding knock it will be the crank bearings or connecting rod bearing. If it is intermitant as you explained it would be a lifter freezing up

Posted on Jul 29, 2010

  • frank thomas wilson
    frank thomas wilson Jul 31, 2010

    When the lifters are out look and see if the lifters side that rides on the cam is mooned out

    that will cause a substantial problem

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