different pitch on sprocket than chain

[bankz]

I recently purchased some 12" wheels for my pit bike as an upgrade from 10". The wheels came with discs and sprocket but the sprocket pitch is 428 but i think the chain size is 420. will this matter as i t seems to go on ok. Somebody please reply ;)

 

[FruDaddy]

Yes, it will wear them out in a hurry, and that's the best case scenario. A 428 chain has an inner width of 6.35mm while a 428 is a wider 7.95. The sprocket is most likely too thick.

 

[bankz]

So can i solve the problem by getting a 428 chain then?

 

[FruDaddy]

Would be better, but you should probably get a 428 front sprocket as well.

 

[bankz]

thanks very much, know any good sites that i could get a good deal on.

 

[FruDaddy]

You might get lucky with sprocket specialists, but I don't know of anyone that could hook you up. Not really familiar with your specific application.