Motorcycle Tire Center Why Does My Motorcycle Stall When I Put It Into Gear?

Why does my motorcycle stall when i put it into gear? - motorcycle tire center

Honda Matic 1978, I have a bike. I cleaned up carbohydrates and today, the air filter. Each time you change speeds in the initial INSTINTLY! What does he do it? This is not the transfer, since the rear wheel starts to spin. I installed it, stand in the middle ... HELP PLEASE!