New Cams etc. Tips required for problem solver.

  • Frosty57
    Frosty57
    11 years ago

    G'day fellas. A mate of mine with a '97 Fatboy, recently had the following work done...42mm carb, programable single fire ignition kit with ignition coil, EV51 cams, adjustable pushrods, new cam bearings and gaskets/seals and a new deep cycle battery. He rode the bike home and since has had trouble with it firing regularly . If put on the charger over night it wants to fire but wont. We can get it going at times with a power pack, but after say, a 1 hour ride if he turns off, it wont fire up again and we are back to push starting...Now it wont fire at all. It makes the same noise as a dickie starter motor in a car, but also it gives a thump sound when turning over like its under strain.  Question??..Would this have any thing to do with needing manual decompression after having this work done on a bike of this era??...Or is the starter motor not up to scratch?? With a new deep cycle battery not firing it up, it has us scratching our heads. The bloke that did the work has since gone into receivership and can't be contacted. Any tips, clues, resolutions would be greatly appreciated. Thanks fellas, and as always, have  nice day.

  • speedzter
    speedzter
    11 years ago
    What is the cranking compression ?
  • perthhog
    perthhog
    11 years ago
    whats the plugs look like from what you have said it sounds rich trying to hydraulic , so as a starting point do what speedster has asked
    comp test with both plugs out charged battery w.o.t to what it is and condition of plugs ,black , dripping in fuel, clean ?
  • Frosty57
    Frosty57
    11 years ago
    Thanks for your input fellas, cranking compression unknown at this point, but will pass on the info and give ol'mate a hand to sort it. Cheers again fellas.
  • daddyracer56
    daddyracer56
    11 years ago

    check alt & reg charging system check & reg plug cleaned should have been done before bike left workshop , good brand battery only deep cycle battery ? never heard of them 

  • paulybronco
    paulybronco
    11 years ago

    Excessive cranking pressure perhaps

  • Frosty57
    Frosty57
    11 years ago
    G'day fellas, checked with owner, plugs new from workshop, yep daddyracer you're correct, should of read new gel battery and paulybronco this maybe the background thump we hear when it's trying to kick over. Have passed on all recommendations, once again thanks for your input fellas, we WILL get to the bottom of this. As always, have nice day.