Most motorcycles have never been heavy enough to need one. Another reason is no body parked their bike with the nose downhill, because the side stand can fold up, causing the bike to fall over. Then along came Honda, with their late model Goldwings. They are very heavy and yes they have a reverse. You put the bike in reverse and hit the starter button and it backs up. There is also a aftermarket transmission housing that can be added to some bikes, such as Harleys, when they are converted to Trikes. This housing adds a reverse gear to the transmission. I think it not required for a bike. If we want to move bike back side we can do it with help of our legs or we can easily handle it in moving back side also, where as for 3 or 4 wheelers it's not possible.
Most motorcycles, personal watercraft and airplanes are usually lacking a reverse gear.
Some motorcycles actually do have a reverse gear. My dad has a BMW K1200LT cruiser that has one. I think for heavier bikes like cruisers it can come in handy. For lighter bikes it just isn't necessary. Moreover it is extremely difficult to balance the bike driving backwards wthout using your legs
Most motorcycles (with the notable exception of Honda Gold Wings) don't have reverse gear.
Most motorcycles do not have a reverse gear like cars. However, there are some electric motorcycles or specialized models that do have a reverse feature to help with parking or maneuvering in tight spaces. Riders can also physically push or turn the motorcycle to help maneuver in reverse if necessary.
For stroke engine bikes use the engine oil as gear oil. In case of a two stroke engine you can use regular 80 W / 90 gear oil.
Bikes with internal gear hubs offer advantages such as low maintenance, protection from weather, and ease of use compared to bikes with external gear systems.
There are some companies out there that sell and even install reverse gear they say fit different kinds of motorcycles including Hondas but it is almost exclusively for owners who want to change a bike into a trike. There are lots of aftermarket reverese gear kits available for Harley Davidson motorcycles but then again, some Harleys were designed with a reverse gear in the past. I have added a link or two that may be of help but otherwise you don't seem to have many options. However, a good motorcycle mechanic may be able to mix a reverse gear onto your motorcycle or you may be able to do so yourself but it requires knowledge and experience in gearboxes.
Fixed gear bikes are not inherently faster than other types of bikes. Speed is influenced by various factors such as rider strength, terrain, and gear ratios.
There are three main types of chainset bikes available in the market: single-speed, geared, and fixed-gear. Single-speed bikes have one gear ratio, geared bikes have multiple gears for different terrains, and fixed-gear bikes have a single gear with no freewheel mechanism.
Not all bikes have "gear". Straddle bikes and direct drive bikes - with cranks directly attached to a wheel axle - don't have gears.
You need to lift the collar on the gear stick to engage reverse gear
Reverse gear