I just got a clone to tun in the open class on my kart it ran pretty good against the two strokes on the small track but they still beat me so I need a little more power. its a blue clone std bore and stroke + .020 rod flat top piston raceseng s1 flywheel 14cc head ported with stock valves it has a dyno 265 cam and bored carb on alcohol. Im already looking for a tillotson alcohol carb and planning on getting a 315 lift 260 duration cam with champion rockers. and dual valve springs. but my question is I would like to get ss valves but being a std bore and stroke should I get stock sixe 27/25 28/25 28.5/25? I will be putting the stock carb back on sometimes to run the stock appearing class looking to twist around 8000 ![Mini Bike :scooter: :scooter:](https://oldminibikes.com/forum/images/smilies/scooter.gif)
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