How about Tian Li motorcycle engine cleaning agent?

Tian Li motorcycle engine cleaner is quite good.

Tian Li engine cleaning agent is very simple to use, and the engine can be cleaned and maintained without disassembly.

Engine internal cleaning agent is a product developed to solve sludge, colloid, carbon deposit, paint film, dirt and other deposits in lubrication system. It is composed of many components and has very strong cleaning ability. It is an additive that can automatically clean the internal system of lubrication system. Engine internal cleaning agent is added into the engine crankcase, and the cleaning process can be completed with the flow of engine oil during engine operation, which will dissolve colloid, loosen the attached deposits and then fall off. The paint film, carbon deposit, sludge and other deposits of piston rings and piston skirts will be completely removed. The cleaned deposits will be filtered by the oil filter along with the oil circulation, or deposited in the oil pan, and will be removed together when replacing and cleaning the oil filter and the oil pan.