Bike will not move forward when put into gear

There is sometimes a kill switch on the clutch lever; as you let the clutch out, the engine cuts out. Check the clutch switch.
Looks like your caps lock button is jammed in.

is this part 2 of another posting - check that one out for half the answer

the fan is supposed to come on when the engine gets too hot - so let it go - no need to stop the engine - usually it will go off - once you get moving at a decent speed

clutch not fully engaging
check for jammed clutch cable out of adjustment

the shifter return spring the one that makes the lever move back to the center somtimes break

This is tough to explain by email, however the key is turn ur bike upside down so you can spin the peddles and wheel, on both the front and back durailier sets are 2 grub screws that stop the chain going off the range at each side you should be able to see which on does what by changing the gear to get close to each and and look at the grub screw that is closest to the little pivot lever and when on the top/bottem gear, adjustso it is just touching it, do go too tight to move it or the bike may not engage the outer gears.

Please rank me if this has helped, thanks Andy

By the "gear arm" I assume you mean that part of the rear derailer that the chain zig-zags through. This arm moves in two ways. It moves in and out (toward the wheel and away) as you move the shift lever - which is how it changes gears, by moving the chain onto different sprockets (gears). It also moves forward and back (toward the front and back of the bike) under spring pressure. This forward and back motion is necessary to take up the slack in the chain when you are using the smaller sprockets (the smaller the sprocket, the "higher" the gear). When the wheel has been removed, this arm moves forward (under spring pressure) as far as it can to take up all of the slack in the chain. All you have to do is grasp this lever and pull it toward the back of the bike, allowing the lever and the chain to pass behind the sprockets (gears) as you pull the wheel back into it's position. You can safely pull this arm forward and back at any time without doing any damage. One more tip-- I find it a little easier if you first put the shift lever in a "middle" gear position. Then when you pull the wheel into place, you should aim to put the chain on a middle sprocket. You don't have to hit the exact correct sprocket as you can simply lift the rear wheel and turn the pedals forward (after installing the wheel) and the chain will move to the correct sprocket corresponding to the setting on the shift lever.
Good luck! Please vote if you found this helpful. Al K

Adjust the clutch cable to allow about 1/4" free play at the end of the clutch handle. Don't put the bike in gear until the rpms are near idle speed. The clutch is working fine if the bike does not lurch forward when going into gear at idle speed. Dirty, gritty oil in the gearbox can make the clutch grab. Consider changing oil if grabbing is the problem. The "crunch" you hear is the slider gear engaging into the driven gear. The higher the engine speed when being put into gear the louder the crunch. The slider gear engaging "dogs" can break. Crunching into gear is hard on the gears.

Post a comment to let me know how you come out on this.