Rear Spocket Change

[gmc38609]

Hello,

Can I just change the rear sprocket on my bike to a larger one without having to replace the other sprocket and chain?

[P.addy]

Should replace all sprockets and chain at the same time really, just going to wear faster than normal if you dont.

[RhynoCZ]

[gmc38609]

So do you put a bigger one on the back a smaller one on the front as well?

Also would this make a considerable difference in pulling away speed ?

[Nobby the Bastard]

A smally front sprocket will have the same effect as a larger rear sprocket, i.e. higher top speed (up until drag oversomes the power of the bike) but lower acceleration.
Doing both at the same time will double the effect of just chaging one.

The chances are, you can change the rear for larger one without altering the chain length.
____________________
trevor saxe-coburg-gotha:"Remember this simple rule - scooters are for men who like to feel the breeze on their huge, flapping cunt lips."
Triumph Sprint ST 1050

[RhynoCZ]

Have you ever been on a mountain bike? Imagine all those cogs and gears you can ''create'' with combining them together.

It goes:
Smaller front sprocket = acceleration // worse mpg, more rpm/heat
Bigger front sprocket = speed // better mpg, less rpm/heat
Smaller rear sprocket = speed // better mpg, less rpm/heat
Bigger rear sprocket = acceleration // worse mpg, more rpm/heat

If you get some specs to your bike you will certainly find what sizes of sprockets you can use. I personally have experience with 44 teeth rear sprocket then 40 teeth on NC27. It felt so fast and powerful, got up to the top of 190kph, terrible mpg, a bit more heat and I hit the rev limiter at 6th at those 190kph. Plus I could ride at 6th all day long from 50kph up to the top. With 40 teeth it went alright, the top moved to 5th gear (180+kph) and it had better mpg and ran much cooler but I had to use the gearbox more often to keep it at revs.

I'd go for smaller front, it's easier to shorten the chain rather than putting there another links to have it long enough. I had to cut 2 links from my chain to fit there 40 teeth sprocket (previous owner put there the 44).
____________________
'87 Honda XBR 500, '96 Kawasaki ZX7R P1, '90 Honda CB-1, '88 Kawasaki GPz550, MZ 150 ETZ
'95 Mercedes-Benz w202 C200 CGI, '98 Mercedes-Benz w210 E200 Kompressor

[Nobby the Bastard]

Your best bet is to stick a red power band on it.
____________________
trevor saxe-coburg-gotha:"Remember this simple rule - scooters are for men who like to feel the breeze on their huge, flapping cunt lips."
Triumph Sprint ST 1050

[gmc38609]

I have a naked bike so really never gonna go much faster than 80mph

So I am looking for it to pull away quicker without it effecting mpg or heat to much

[RhynoCZ]

[gmc38609]

Honda Hornet 600 anything over 80 is so uncomfortable due to wind it just aint worth going faster lol

[Raffles]

[RhynoCZ]

[SteveZZR]

Its not always an exact science with sprocket size and mpg though!


I can actually wring more out of my ZZR 600 with a minus three front sprocket than I could with a -3 rear (which is same as a +1 front).


Stock gearing would give 40-50mpg
+1 front would give constant 45mpg

-3 gives 35 to 55+ dependant on riding

With a short gearing the bike pulls better at low revs in top gear so can be ridden like a nob which is brilliant fun, or can be carefully commuted on

[P.addy]

With a Hornet, tank range is not something you should really care about, just make sure you know the local petrol stations well.

Sure, downgear it, I've seen CBR600F's with 15/58 setups for stunting so the engine can take it.

Bigger rear/smaller front = better acceleration at the cost of speed.
Bigger front/smaller rear = loss of acceleration but might eek a few more MPH out of your bike.

[Rogerborg]

[P.addy]

Rogerborg, wheelie king

[RhynoCZ]

I say just do it, loose 2 teeth on the front, if it's possible and you'll see. Maybe you're not going to need to cut the chain at all, so if you won't be happy, you can change it back.

It will give you some fake torque and ponies.
____________________
'87 Honda XBR 500, '96 Kawasaki ZX7R P1, '90 Honda CB-1, '88 Kawasaki GPz550, MZ 150 ETZ
'95 Mercedes-Benz w202 C200 CGI, '98 Mercedes-Benz w210 E200 Kompressor

[Ariel Badger]

The front sprocket will always wear more than the rear as each tooth has more work to do due to the reduction ratio. Change both and a new chain.
____________________
Bikers make great organ donors, get 115 on your licence today.

[pepperami]

[Nobby the Bastard]

[RhynoCZ]

[Rogerborg]

Indeed, I can't get my head round the advantage of binning thousands of miles of usable wear in order to... uh... avoid getting the most use out of those components.