How to make a DIY piston stop tool from an old spark plug

In this video I quickly show you how to make a quick and easy DIY piston stop tool for your motorcycle, moped, small engine etc.
DISCLAIMER: In this example I use the tool to remove a flywheel nut. This is not the most correct tool for this job, and has potential to cause damage to the piston, wrist pin/con rod bearings, etc. if used improperly.

[@servoletti4640]

This tool can also be used to create/check TDC marks on any engine. Just rotate engine against the stopper from both directions, clockwise and counter-C.W. TDC is in the middle of these points. In 4-stroke it would be a good idea to do it in compresion/power stroke to avoid valve damage. Nice handcrafting, I will follow Your guideline to make me a 'timing check' tool. Thank You!

[@ricksgt2012]

Thanks for the video

[@bradpool127]

Well. Made that look easy.

[@GPDIY]

Very good idea.

[@AN-kg4ei]

Holding the flywheel to remove by pinning the piston is a risky bet... great tool though!

[@occult-classics]

Agree, thats why I decided to include that disclaimer in the description. Helpful tool if you are in a pinch but also can be useful for setting timing, etc.

[@tyscott4538]

How much of that bolt should go inside the spark plug hole?

[@hajiothman4050]

Thank you sir.