There was a time where 2-stroke engine motorcycles were dominating the race tracks. The high revving mills used a mix of petrol with oil, and are known for their high volume to power ratios. We don’t see many 2-stroke motorcycles anymore since most manufacturers have completely moved to 4-stroke engines, almost entirely because of emission laws. That doesn’t mean we don’t enjoy seeing a modified 2-stroke motorcycle. Because we are old-school like that.