top of page


  • Does the DRILLSTARTER fit my engine?
    The DRILLSTARTER fits many pit bike engines. The important thing is the thread in the flywheel. This must be M27x1 LH. If this is the case, then only the alternator cover needs to be drilled. For most engines, it is sufficient to place a hole with a diameter of 30mm in the middle. Alternator covers are available in the shop that are already prepared. On the Zongshen 190, the edge on the inside of the hole must be removed (the hole is present from the factory). The DRILLSTARTER is not compatible with Zongshen 190 with E-Start (or E-Start flywheel).
  • Which cordless drill should I use?
    Use a cordless drill (or 220V drill) with at least 2 gears. The speed of the 2nd gear should be at least 1500 rpm. The battery voltage should be at least 18V or more. The higher the voltage, the more torque. Depending on which motor you want to start, torque could be an important parameter. Be sure to use a drill with a quick stop function. This will help you find the right position to start the motor. Note: Do not start your engine in first gear! The speed is too low for this and the compression forces acting at low speeds are high. There is a risk of injury! A notice: Do not use an impact drill! This will destroy the freewheel unit.
  • Which position is the correct one to start the engine?
    After you have put the drive unit on the freewheel, find the right starting position for operating the drill trigger by turning the entire drill anti-clockwise. The drill's quick stop function is very helpful here. As you turn, you will find areas with a lot of resistance and areas with hardly any resistance, similar to driving uphill and downhill. Within 2 revolutions (4-stroke cycle) there are 2 consecutive uphill climbs. The best position is shortly after the 2nd uphill climb. This position gives the drill time to build up "inertia" as soon as the trigger is pressed.
  • The lock screw on the chuck of my cordless drill has broken off. What do I do now?
    Depending on the type of cordless drill and engine combination, the drill chuck counter screw can break off under excessive load. Unscrew the broken screw from the shaft. For such cases, a high-quality counter screw suitable for most drills (M6x27mm left-hand thread) is included in the scope of delivery. Before screwing the drill chuck back onto the shaft, generously secure the thread with high-strength thread-locking varnish. Then reinstall the counter screw and wait a day until the locking varnish is fully cured. Additional counter screws are available in the shop.
  • I can't get the broken drill chuck lock screw out. What can I do?
    Please note that the screw has a left-hand thread. To remove it, you must turn it clockwise. If the tear-off edge is very short, it can be difficult to remove the screw. Proven methods are: · Make a slot in the remaining piece with a Dremel. Then use a flat screwdriver and hammer to move it in the direction of rotation. · Put on an M6 nut and use a welding device to create a connection between the nut and the remaining piece. Then unscrew the screw using an open-end wrench.
  • My cordless drill isn't able to completely turn over the engine and stops.
    The cordless drill being used is too weak for the combustion engine in use. Use a cordless drill with at least 18 volts of battery voltage or more. The speed of the second gear should be more than 1500 RPM. There is too much gasoline in the combustion chamber, which increases the compression. Unscrew the spark plug and turn the crankshaft with the DRILLSTARTER a few times. Reinstall the spark plug and repeat the start process. The decompressor is not functioning properly. Check the function of the decompressor. For more information, see the question "What can I do to reduce the mechanical resistance of the engine?"
  • What can I do to reduce the mechanical resistance of the engine?
    · Check the proper function of the decompression unit. · Check the valve clearance of the exhaust valve. Check the function of the decompressor and also check the valve clearance . On larger engines from 190ccm, the decompressor lever is pre-tensioned with a spring. The tension of the spring can give way over time. Insert a harder spring or over-tighten the spring by one turn. Harder springs can be purchased here:
  • TIP: Always ensure that all components are free from corrosion
    The main components of the DRILLSTARTER are made of steel. Steel is not corrosion-resistant, but is harder and more durable than many types of stainless steel. Therefore, always ensure that the components are free from corrosion and moisten the surfaces with a little bearing grease or similar. The most important part is the left-thread that is screwed into the flywheel. Make sure that there is some anti-corrosive protection such as grease or copper paste on it before you insert it. When delivered, the thread is already coated with copper paste.
  • Do I need to lubricate the freewheel bearing?
    The freewheel bearing is already provided with lifetime lubrication when delivered. However, in dusty environments, dirt particles can settle in the freewheel bearing. In this case, clean the bearing of any contamination and rinse it out with isopropanol, for example. Then grease it again with bearing grease.
  • I can't get the freewheel unit off the flywheel. What can I do?
    Make sure that the thread of the freewheel unit is always lubricated and protected from corrosion. This will help in case the freewheel unit needs to be removed. Place the locking key on the housing of the freewheel unit and turn it clockwise to loosen it. Use an oil filter wrench / flywheel holder to help hold the flywheel in place. If the freewheel unit is so tight that you can no longer loosen it with the locking key, then these additional tips will help: A pulsating impact motion is most helpful for loosening a very tight freewheel unit! Loosen the fixing screw (Torx) on the freewheel unit and pull the freewheel element out of the round shaft. Turn this 180 degrees and put it back on the shaft. You have now changed the direction of rotation and can use an 18mm socket and an impact wrench to loosen the freewheel unit from the flywheel. This could damage the freewheel element, but it would be easy to replace. The use of a ratchet is also possible, but requires heavier hands (holding the flywheel, etc.)
bottom of page