Question about 1979 Harley Davidson XLH 1000 Sportster

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New motorcycle gas tank

I had a new motorcycle gas tank installed on my bike and I think the shop did not clean the inside of it and left the oily residue in the tank and just put gas in it. Now my bike stalls and I get smoke coming from the breather bolts. Could this be the problem?

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  • aleite07 Apr 19, 2009

    It was a brand new tank and there is not a fuel filter. Just the screen that goes above the petcock.

  • aleite07 Apr 19, 2009

    Less than 10 miles

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  • 103 Answers

Oily residue would not harm the engine...unless it had alot of dirt in it...was it a BRAND NEW tank, or refinished? A small ammount of oil in the fuel may make it smoke a little from the exhaust, and foul the plugs, but it would eventually go away as you refilled the tank.....do you have a fuel filter installed?....ALWAYS flush then new tank when you install...if it continues after another tank of gas , let me know and we will figure it out

Posted on Apr 19, 2009

  • Chris Kieninger
    Chris Kieninger Apr 19, 2009

    I would reccomend installing another inline fuel filter in the line as well.....how many mile have you put on it since the the tank change?

  • Chris Kieninger
    Chris Kieninger Apr 19, 2009

    well...if you want to be safe you can always drain the gas that you have in the tank now...it should have pretty well cleaned the oil out...refill it with clean gas , add an inline filter and put some miles on it..... if you still have smoke coming out of the breather bolts let me know

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