YZ85's are actually an exceptional bike.. but you have to stay on top of the maintenance.
A brake shows the car/bike down until it comes to a hult/stop. A gear changes the speed the engine works at depending on what type of road you are driving on and the speed limits. If you are asking about a bike then the gear's change the speed at which you pedal at, gear 7 on a bike makes you pedal slower but you have to push harder down on the pedals, however gear 1 on a bike makes you have to pedal faster and more genitally on the pedals, - both gears really work your muscles... so if you have a bike with gears up to 7 stay on 3 or 4! Gear box = what you use to change the gears on a car. Handle bar = what you use to change the gears on a bike.
Gravity
The temperature will keep the 1986 ford tempo automatice transmission to stay in first gear because this car was design for the cold. Changing the gear to early and a cold temperature could ruin the car.
it is probably that your shift lever bushings have worn out, but check the rubber seals and carpeting, sometimes they put pressure against the shifter making it pop out of gear.
You stay in a gear that lets you spin the cranks between 80-110 RPM while keeping your heart rate in a zone that doesn't lead to lactic acid build-up.
you drain the water and the water will fall out and the dirt will stay in the drainer?
Dirt
in order to stay safe on a bike is stay on seat at all times .listen to the traffic signals .stay in the right lane at all times.remember these tips and you'll be just fine I'm muqtadir and here is your wiki.answer
i had the same problem. i found that its the carbuetor because when i sprayed starting fluid on the choke and got it to warm up and stay running it ran fine
think about riding a bike when you were a kid. When you go up the hill, it's almost impossible to go up the hill in high gear(like 10 on a 10 speed). Same thing with an automatic transmission. If the vehicle encounters more of a load(ie: going up a hill, accelerating quickly), it will gear down to a lower gear. This enables 2 things. First, it doesn't kill your engine, and it also allows the engine to operate at a higher RPM where is develops more horse power.
if u are in a high gear no shift down because if u stay in the same high gear u will loose rpm as the car skids sideways causing a shorter drift.