Alternative sprockets

[the lodger_imp]

My 2013 cast wheel 5 speed has 18T front and 39T rear sprockets as standard.
I would like to change the gearing to get more mph per 1000rpm ( so bigger front/smaller rear ) but I cannot identify any UK source for a 19T front or a 36T rear sprocket ( there are any amount of sprockets going smaller front/larger rear ! ).

I was looking at a cb1300 front 19T sprocket on ebay. Does anyone know if this will fit ?

Thanks

 

[warman_imp]

I got my 19 center from some outfit called Chris products/PBI. Dropped at lest 200 rpm from my cruising speed of 65mph. And I believe I get 8 miles more from a tank of gas.

 

[peterbaron]

For my '13/5 speed, I only replaced front OEM 18T with 19T sprocket, and you will have to grind down a "C" shape metal steel plate. I never touched my rear sprocket, but in your case...??

See this thread:

http://cb1100forum.com/forum/showthread.php?tid=3378&highlight=19T+sprocket

and there are a few more, use Forum's "search" option