i was cleaning my sproket last night and i read this number of it it was 245a-43. i google it and i got this SPROCKET-VORTX520CONV 245A-43T Vortex Racing 245A-43 HON CBR600F2-F4 91-00/CBR900RR 93-99. the question is what is it for ?. is it for speed or for stunts can someone please give me the answer? thank you

 

43 is stock but the 520 is not stock is 530 so your chain is lighter and smaller than stock only downside is they wear out a litttle quicker

 

cool tank you dude

 

It's just a rear sprocket. Nothing fancy. Stock size, 520 pitch which means slightly lighter weight chain. The difference is negligible.

 

cool