i would assume you have cranks with a built in sprocket, if this is the case, you can't
After you remove everything required to get to it, it takes a special tool to pull it off the crankshaft.
I'm assuming that by "front sprocket" you are referring the gears attached to the crankarms, referred to as "chainrings". If you are removing the outer two rings, use a 5mm allen wrench to remove the four chainring bolts attaching the rings to the crank. To remove the inner ring, you will have to remove the crank from the bottom bracket, a process requiring a specialized tool known as a "crank puller". For either of these processes, though, consider consulting your local bike shop to make sure you are taking the correct approach and not damaging or degrading your bike.
The sprocket on the nose of the crankshaft that drives the cam sprocket.
It runs off of the front of the crankshaft, under the crank sprocket and crank pulley. You have to to remove the timing chain/belt.
To remove a bike crank without damaging it using a bike crank puller, follow these steps: Unscrew the crank bolt using a wrench. Attach the bike crank puller tool to the crank arm. Turn the crank puller tool clockwise to remove the crank arm from the bike. Repeat the process for the other crank arm if needed. By following these steps carefully, you can safely remove the bike crank without causing any damage.
should be an Allen head or torx screw in the center of the crank.
If the crank has 48 and the sprocket 12 then 48/12=4. The wheel will turn 4 times for each turn of the crank.
Chain is on the smallest sprocket on the crank and on the largest sprocket on the rear wheel
To properly remove a SRAM Force crank, you will need a crank puller tool. First, remove the crank bolt using an 8mm Allen key. Then, attach the crank puller tool to the crank arm and turn it clockwise to push the crank arm off the spindle. Repeat this process for the other side if needed.
you must remove the clutch hub (along with clutch plates etc) which will require a speciall puller...also, remove the front sprocket 9on the end of the motor crank), once they are both removed (the belt and all) you will have access to the bearing...
Look closly at the sprocket and you will see a small dot or indentation,you align both dots (cam and crank sprocket dots)
20 rpm