porting

  1. carl clack

    Porting First Time No Problem?

  2. S

    Offroad Build

    Ok, so these last few weeks I've had the urge to make a light trail/offroad bike. I would like to add much more low end power. So my list is: Port my cylinder for low end power Extend header on my expansion chamber go back to 44 tooth sprocket What else do I need for this and Can anyone help...
  3. J

    70cc Engine Tuning Advise Needed

    Hi, I have brought about all the upgrades you can have for my 70cc engine (jaguar cdi, banana muffler, performance carby, iridium spark etc). So I am now looking to do some work on the engine. I was thinking of starting off by just cleaning up all the ports & polishing everything. But...
  4. J

    The return of NEL LUSSO!!! (porting)

    So my bike is naked at the moment. So far I have a coil and mag on the way, rings to order, studs to order, and a cheap but better carb to find. I have a month to work on this and wanted to look into porting my cylinder. I was hoping you guys could point me in the right direction on this one as...
  5. R

    port timeing help? tuned pipe

    gi fo all those that have done port mods im sure your have done a port timeing chart useing a degrea weel anywas to the point im trying to make a tuned pipe during my off season iv only got 2 weeks to have it fineshed and i nead the port timeing. if any one had the exhaust port angle the...
  6. Y

    crankcase stuffing and other bottom end mods

    I will be buying a new engine in a few weeks because my old one was ruined by a thief how put regular gas in it and ran in the rain after the air filter fell off. I got the bike back but it needs an engine. I will be taking it apart to do some mods and upgrade bearings. I want to port match the...
  7. R

    Getting all 3 Horse Power out of your GT-5 Sky? (tear down)

    Are you getting all 3 Horse Power out of your china 2 stroke? I know I’m not. With the untrue rag joint sprocket, the “California Friendly” catalytic converter exhaust, CNS BS carb, unbalanced crank, Chinese bearings, and unmatched porting, I think I would be lucky to get half the rated horse...