that's very interesting because we have found the opposite regarding the casting finish. Overall it is smoother finish than other brands but I take your point, there are one or two external areas that could be cleaned up better after the casting process.
By the way, we have new model roundslide OKOs available:
OKO 3000 - Now available in 28mm! Popular choice for classics and post classic trials bikes! Price to be confirmed..
OKO 3005 - Large bore roundslide - available in 32, 34, 36, 38 and 40mm! We have finally crumpled under the demand for a larger bore model roundslide - popular choice for large capacity single cylinder thumpers, classic motocross etc. Prices to be confirmed..
Regards
Denis Lovett
Proprietor
OKO Australia
http://www.oko-australia.com.au