in sri muda there's 3 good workshops i can recommend... the best but most expensive workmanship would b yy pang, 2nd wif a slightly cheaper price would b ck motors n 3rd would b gou su motors but i'm not sure whether gou su would b able 2 do more advance mods s they r not really meant 4 racing except setting... yy pang would b the best but workmanship really really killer price n the workers there r kind of bad attitude, those i noe i'm very good attitude but advised 2 go there s they r the best so far besides the price... ck not bad oso, famous 4 racing bikes 2