Is this a NovaMega SX-21 EVO5 MS Sleeve?

BTW: How do I remove all that carbon build up?
Thanks

hey that looks like an evo 5 ms sleeve. aniwae to remove the carbon build up, i personally use autosol making that brass reaaaaaaaaal shiny. if u have the dremel with a polishing or buffing bit. heh. but buffing is for plastics i think =X polishing bit most probably. BUT be careful with those ports. nvr leave ani autosol in the ports or they will go up into the combustion chamber and reduce ur pinch bit by bit. heh.

anyone else could tell me. It looks like its stock R1 sleeve.

dude... i have that engine and i can confirm it... looks exactly the same b4 i did something to it =X