sprockets front and back?

Question

could some one plrase explain to me the benifitsw of changing your sprockets... in detail please

Answer 1

Changing the sprockets have the same effect as changing the rear end on your car. If you switch to a bigger rear sprocket/pulley on the back, then you will have better acceleration at low speeds but less top end speed. A larger front sprocket/pulley will do the opposite.

Conversely, a smaller rear sprocket will make you go slower off the line but have a higher top speed. The reason for this is gear ratios.

Answer 2

Have you ever seen a 10 speed bicycle?
They have 2 sprockets in the front and 5 in the rear.
1st gear is the smaller front and the largest rear.
That gear ratio makes it easier to start moving from a dead stop - quick acceleration.
10th gear is the larger front and smallest rear.
That gear ratio, your not pedaling at 50,000 RPM to go the top speed of the bike.
But if you tried to start out in 10th gear, you would have to exert a lot of force on the pedals just to get moving.

Now think of sprocket ratio in motorcycle terms.
Small front and large rear - just crack the throttle and zippppp!!! - you're flying. But the engine can only spin so fast till it hits red-line and there's nothing left. So you won't have a very fast top speed.

Switch to a large front and small rear - your engine will be exerting a lot of HP just to get moving. But when it does get up to highway speeds, the engine has a lot of HP in reserve, because it isn't laboring to keep the bike moving. With all that reserve HP - just open the throttle to go faster and faster and faster.

Answer 3

The same theory goes for my modified lawntractor - normally a tractor uses a small 3-4" motor pulley and a 7-9" trans pulley- good for grunt and low power, and low speeds- around 5 mph. Now with my modifed tractor, using a 18HP twin and a 6" drive pulley, a stock 6 speed "shift on the fly" transmission with a 4" pulley- im netting around 40mph. Using a larger tire setup, i can basically get flying pretty quickly. Since the trans is still stock geared, 1st gear is still '1st gear' - its slow - but after 3rd gear, it really starts to move.
My ultimate goal is to hit 60mph plus - since the stock trans is limiting my output gearing ( ive had it fully wound out), im swaping in a straight axle - using a go kart or some sort of clutch, # 35 motorcycle chain, a right angle gear drive 1:1 ratio ( used on a bushog mower- to avoid having to change gears- the clutch will 'be' the trans).

Answer 4

I know if you change your front sprocket to one with more teeth(Bigger), your low end(Being first gear) suffers but your top end (Once the bike gets going) goes a lot faster.

And If you raise (with more teeth) the Back sprocket, the bottom end accelerates much quicker but you lose top end speed.

I think this is right.

Answer 5

The above answers are correct, but I'm going to go a different route.
If you mean when you change your chain, it's because sprocket teeth wear into a "hook" shape, which will speed up wearing out the new chain you just put on.