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Hi Beuh . I have built an engine using this cycle of operations . It is a 2 stroke engine and it completes all 4 cycles in one revolution of the crankshaft . There are two valves .The inlet is atmospherically operated and the exhaust which is located about half way down the stroke is spring...

Why not put a light shim under the o ring to tighten it up , save you making a new piston. Vince

This is a link to my version of a simple I.C engine based around Henry Fords engine. In my opinion they don't get much simpler than this https://youtu.be/ICOC9Kvq488

John I would also like to wish you all the best and say thanks for your contributions from which I always learned something. Vince

His workshop and bike are a credit to him ,I could do with taking a few leafs out of his book. Vince

Looks good and runs good, can't ask for more than that Vince

You could fit a Lucas spring starter ,just wind her up and away you go. Vince

That book will make interesting reading . Thanks for uploading Vince

Could you turn the flywheel in the milling spindle and hold a cutter in the vice. Vince

Thanks Dave

Thanks Pete Their was a bit of head scratching along the way but I got there in the end.

Thanks lads. It was a bit of a scrapheap challenge.

This is an engine from bits and pieces I had lying around ,the frame is of welded construction ,cylinder is from old hydraulic ram , flywheel is old hand wheel ,piston and head is cast iron ,piston rings from old shock absorber. This is a link to it running. http://youtu.be/F2AWQqTTsFI...

Sorry I just presumed your spindle ran on taper bearings (should have read the whole thread) Vince

Car and trucks use taper roller bearings in the wheel hubs and have about 3 thou floating clearance when assembled and they put up with severe punishment from the road surface without any diverse affects so I don't think a whack of a hammer to release the morse taper in the spindle would harm...

Could you use a small bearing mounted on a shaft and bring it into contact with the work piece until the bearing just starts to turn and then half the bearing diameter to find the edge Vince

Glad to hear you discovered your problem ,looking forward to seeing it running. Vince

This might sound like a stupid question but is your valve timing correct,it is very strange to have no compression even with bad valves etc. Hope you find the solution soon as I know it must be frustrating. Vince.

You need to put it on bit by bit,put on some braze let it cool and then put on some more other wise the piece gets too hot and it runs . hope this is of help . Vince

Hi Matt , You should stick with the oiler it works well, I have one on a Ford engine which I did not even have to modify other than put in a bit of gauze to break up the drops of fuel. The only time you would need a carb is if you are trying to govern the speed of the engine Vince