Here's an interesting engine design - this is a split single cylinder 2 stroke, invented in the early 1900's and adopted by a few manufacturers. The... | By Motorbike maintenance in The Philippines | Facebook
EngineLabs - Two pistons, one rod... The split-single or "twingle" engine definitely qualifies as weird. | Facebook
![No Reserve: 30-Years-Owned 1965 Puch 250 SGS for sale on BaT Auctions - sold for $6,200 on March 6, 2020 (Lot #28,769) | Bring a Trailer No Reserve: 30-Years-Owned 1965 Puch 250 SGS for sale on BaT Auctions - sold for $6,200 on March 6, 2020 (Lot #28,769) | Bring a Trailer](https://bringatrailer.com/wp-content/uploads/2020/02/1965_puch_250_sgs_15828360621d4c7ed257e4dd26IMG_3980.jpg?fit=2048%2C1364)