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Check you have petrol if the bike has not been run for sometime replace the fuel. Petrol ages and causes all manner of problems.
Are you trying to start the bike but it has gone onto reserve, move the fuel tap to the reserve position then try to start it. If the above fails, then try these:-
Is the spark plug wet when removed. If dry it sounds like the petrol is not getting through. Try opening the filler cap and leave it open, make sure the kill switch is in the run position. Try starting with the throttle full open. Does the bike have a manual choke try to start with the throttle shut, choke off, then full on, then while continuing to turn over move the choke lever in stages from fully on to fully off. I find on my Yam TW125 (winter and bad weather hack) that if I have not used it for a while sharp twist the throttle a couple of times no more than a third of a turn. Hope this helps.
first check the spark plugs if there is any spark when u try to start the engine...if there is none, then test the wiring without the spark plug and see if there is any spark...now if this does not solve then check the carb and also make sure there is petrol in it and petrol is flowing to the carb freely..If that does not solve then let us know and I will explain further as there is more complicated things that need to be checked and I cannot assist in a simple message.
Hi it sound like a blocked jet in the carb, petrol crystallizes when left over winter time, it blocks the holes in the fuel jet, when you come to use it again next summer, best thing is to drain all the fuel/petrol from the float chamber in the carb over winter time. TO FIX IT you can strip the carb down and clean the restricted holes with a needle or fine wire to clear the blockage.if they've become blocked.
The 'DIPLOMAT' series of WEBBs is bad news, its NOT a WEBB! Webb were swallowed by qualcast-atco-suffolk, who dunped Webbs tooling, & dressed up punches & commodores in thin disguises, dumped the briggs & stratten engine for their own alloy job, & charged a rip off premium for the Webb decals! The qualcast suffolk alloy engine suffers from a WIPAC electronic ignition unit. As it gets old, it fails, sometimes completely, sometimes as it warms up. Once cool, it works for a while again. Not too hard to replace, but hard on the wallet, £69 genuine, £40 fake! On the whole its not too bad an engine if cared for & oil changed often. better to look on ebay for a cheap used HONDA engine & transplant! R-E-L-I-A-B-L-E !............I did! ( £35 honda gc series, 5,5hp! )
Fuel in the oil indicates an excessively rich condition. To correct, you will need to drain the petrol contaminated oil and replace with new. Then, take out the old spark plug and leave the spark plug hole open. Turn the engine over several timesby hand to help vent any raw gas in the cylinder. Then, install a new spark plug.
You should be able to now start your engine and make any other adjustments with it running.