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I'm new on here and really need some help I bought a johnway 49cc scooter, because my other sunny scooter just got stolen 5 days ago....i have alwAys upgraded my scooters with a big bore kit... for that extra speed... now the johnway I just acquired has a 49cc motor in it plus it has all these vacuum hoses emission attatcments.. one on the exhaust.. which I sealed of and a bunch of other unneeded vacuum lines.. I installed the 100cc big bore piston..my question is do I haft to upgrade my valves too? I can't seem to get it to stArt up.. I have spark fuel and air it just won't turn over I'm thinking maybe the valves are too small... please any insight would be greAtly appreciated