how tight should my ezip drive have to be? and how do i adjust it? thanks.

When you say "your drive" exactly what are you talking about? If you are talking about your chain there should be about 1/4 inch up.down movement in the lower part of the chain. As for the screws they should all be tighten with a screw driver basicly as tight as you can tighten them with your hand. All Allen screws and small hex bolts should be tightened with small (short) wrenches. Using short wrenches help to avoid over tightening thing. Hope thins helps....Bob

PS... remember everything on the bike is metric.....Where are you locater (USA)??

the chain drive for the ezip motor. yep usa you?

OK, you don't have to turn the bike over to aqdjust the chain but it is easier, Remover the batter from the bike and turn the bike over. Loosen the wheel nut on the motor side only several turns. There is a small bolt (I think it requires a #8 wrench) in front of the wheel nut. This is a bolt and nut setup so you need 2 wrenches. loosen this bolt and nut several turns. In front of that bolt is the actualy adujstment. Look for a threaded rod with 2 nuts on it. Between the nuts is a steel plate welded to the bike frame that the threaded rod passes through. To make the chain tighter loosen the nut closed to the rear of the bike and tighted the nut closes to the front of the bike. To loosen the chain do it the other way. You should be able to lift up on the back of the motor. To check the chains be sure to life up on the motor. Remember the bike is upside down so the weight of the motor is pulling down. But when you turn the bike over the hanging weight will be reversed.

It is always better to be too loose then to tight. So error on the loose side. The proper amount of slack in the chain should be 'tight on the top" (when the bike is upright on it's tires) and 1/4" up/down movement on the bottom. Because you are checking this with the bike upside down this is why I said to lift up on the back of the motor when checking.

Once you are happy with the adjustment lift up on the motor and tighten the wheel nut. This will hold the motor in place while you tighten the bolt and nut and then tighten the nut on the threaded rod. When tightening each item be sure you do not effect the chains adjustment.

The whole proccess should only take 15 mins or less. Remember to keep the chains clean and lubricated.