sprocket question.

[Quadrider10]

so i boght new sprockts awhile ago, and i have like 3 practces and 2 racs on them, and they look really good, and so does the chain. the rear sprocket looks like it has no wear to it other then the paint, and the front is a little worn, like its just starting to round the teeth a tad. since im getting my head rechambered, and cylinder ported, all the power gains, i could increase the gear ratio a little. rite now i have 18" tires, and 13/40 gearing. i want to go to minium 14/40 gearing and if i am still not happy, then 14/39 0r 14/38 and see how that goes. would it be alright to just replace the front sprocket since its not worn really at all?

 

[Blaaster]

Bear in mind, even though the chain looks good, it has stretched to suit the worn sprocket.

It will quickly wear out a new sprocket, and stretch more to accommade it.

Just think what the back sprocket will try to do, it now has a chain which does not ride well, so it tries to manipulate it to suit.

Then the chain hits the front again, and the whole process starts over.

The chain and sprockets take excessive punisment, resulting in premature wear and maybe breakage.

The chain and sprockets will not know if they are Arthur or Martha, and the process of wear will go round and round in ever decreasing circles, until it eventually dissapears up its own butt.

If you intend doing it, invest in a case saver!

Golden rule, always replace all, never mix and match chains and sprockets. It is safer, and in the long run cheaper!

 

[Quadrider10]

Bear in mind, even though the chain looks good, it has stretched to suit the worn sprocket.

It will quickly wear out a new sprocket, and stretch more to accommade it.

Just think what the back sprocket will try to do, it now has a chain which does not ride well, so it tries to manipulate it to suit.

Then the chain hits the front again, and the whole process starts over.

The chain and sprockets take excessive punisment, resulting in premature wear and maybe breakage.

The chain and sprockets will not know if they are Arthur or Martha, and the process of wear will go round and round in ever decreasing circles, until it eventually dissapears up its own butt.

If you intend doing it, invest in a case saver!

Golden rule, always replace all, never mix and match chains and sprockets. It is safer, and in the long run cheaper!

well yeai know that. but since there were only a few rides on them, i figured it hadednt reach a point yet where you cant just swap them.

 

[Blaaster]

Read my lips, "Never mix and match worn sprockets and stretched chains".

 

[Quadrider10]

Read my lips, "Never mix and match worn sprockets and stretched chains".

ugh fine! be that way! I:I

 

[Blaaster]

Isn't it depressing when someone tells you something that you already know.

You were looking for a way to shortcut a situation, that you already knew you should not shortcut!B)

 

[mjgnslngr]

^^^hes right on the money! A sprocket and chain set is just that, a mated set. Once the break in together, they're married for life! Lol put a new sprocket on an old chain and watch how quickly they get divorced!!! Expendable parts. Just like oil n tires, you wouldn't re use old oil with a new filter??? Same, same.

 

[wwholden]

Ill mention that when having a 14/40 gearing then going to a 14/38 I couldn't really see the difference. Was too small for me to notice. This is a different bike btw not the one in my sig. This bike has a right bend and a mild port. Anyway Id check out the 15/40 gearing if your going for a full port job.

 

[zmaro]

Ill mention that when having a 14/40 gearing then going to a 14/38 I couldn't really see the difference.

Thats funny, I didn't notice much difference going from a 13T to a 14T in the front (probably because all it did was spin in the sand), but then once I switched to 38T in the rear I could feel a difference. This is with 18" tires, and just a Toomey pipe.