Forums Recent Posts Members Forums Notifications Clear all Junior 4-Stroke Specs & Mods Discussions dedicated to 4-stroke junior class bike specs and performance modifications. | RSS Junior 4-Stroke Specs & Mods Forums Engine Top-End 0 / 0 Engine Crankcase 0 / 0 Engine Clutch 0 / 0 Air & Fuel Delivery 0 / 0 Cooling System 0 / 0 Frame & Suspension 0 / 0 Brake Components 0 / 0 Rims & Tires 0 / 0 Status Topics Forum Replies Views Users Date Load More Topics Share: