not exactly giving us much to go on.... Is there fuel? is it getting through to the plug (is plug wet) Does it turn over Is the battery flat? Do you have a spark? Has someone stolen the engine from under the panels?
Giving it a general cast over, is anything missing?, Everything hooked up /secured, Been sitting awhile-?just need a general all over health check(might wanna do a 100% in that regard)-then be easier to find a definitive fault. .
Hic%,(your round next Stig. ), Correct grade spark plug??, What's the set-up on your 'ped?, Is it standard or modified!!!??, Reckon the mod.issue could make large problems on setting up to run proper if set-up not known. .