Sick Bike Parts Promo Codes & Coupons September 2026 — Up to 20% Off

Sick Bike Parts offers Standard 2 Stroke Shifter Kit, made in the USA-Sick Bike Parts encourages you to compare with poor quality imported kits, which are usually more expensive! This kit will fit almost any stock, unmodified Chinese two-stroke bicycle engine, and will allow users to shift gears using the bike's standard rear transmission. This and their HD kit are what you see in YouTube videos. Take a look at the parts list in their installation manual and see what they provide in this kit. If you have an integral crank, you will need a bottom bracket adapter and most likely will need to buy a new pedal. All of their shift kits are designed for engines equipped with standard 6mm mounting hardware. If your engine has 8mm hardware, some modifications will be needed.