
This part being universal, it may require adaptations
JIMS Valve – Manufacturer Ref: 727K
Designed for vintage and classic bikes, this pair of JIMS decompression valves is aimed at riders with high compression engines seeking reliable starting assistance. Manual in style and presented in a silver finish, each valve installs into the cylinder head to relieve compression during startup and facilitate the primary starter's action.
Installation: fitting requires drilling and tapping each cylinder head (tapping 10 mm x 1). If you are not equipped for these operations, consult a specialised workshop to ensure a clean and safe installation. These valves easily integrate into setups where temporary compression relief improves starting without affecting carburation or ignition.
Ideal for Big Twin owners seeking a simple and robust mechanical solution to ease starting on powerful engines, this JIMS part embodies the mechanical and vintage spirit of classic machines.