High performance racing valves from NCY. These are a must for any serious tuner. With stainless construction and level seats, these scream quality and performance right out of the box. Intake: Stem = 5.0mmHeight = 65.75mmValve = 28.0mm Exhaust: Stem = 5...

The rocker arm assembly for Type 1 QMB139 engines. Type 1 has a shorter head and 64mm valve stem length. If you have 69mm valve stem length and a taller head, you have the Type 2 engine and chances are your scooter is newer Product is intended as OEM...

PCV block off plate used for removing PCV system on GY6 engines. Most GY6 scooters have sub-par PCV systems often causing massive vacuum leaks that lead to poor performance. When installing this block off plate, it is highly recommended you purchase a...

Unlock the true potential of your engine with our High-Performance Cam. When you're enhancing your cylinder and head with a new 72cc or 82cc kit, this camshaft is your key to optimal performance. Boasting an Intake Lobe of 25.8mm and an Exhaust Lobe of...

Elevate your GY6 Engine's performance with our meticulously crafted Performance Camshaft. With an expertly designed increased leading slope and a later intake valve opening, it's the ultimate enhancement to pair with your larger displacement cylinder,...

Decompression tubes replace your dipstick and allow excess crank case pressure to be released. We recommend installing these tubes along side any cylinder kit.