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Could be a few different issues - backfiring through the carb - are you sure that your exhaust has all the water out of it? If you check that - and pull the bowl off the carb and make sure you're float is not stuck. If your float sticks one of the symptoms is backfiring through the carb/sending fuel into your airbox versus drawing into the engine. If you can let me know how those 2 things are and whether it
s turning over and firing I can help you from there. All The best - Justin Lee Buy Honda Polaris Kawasaki Yamaha Suzuki Can Am KTM Parts you can use that site/ enter in your make, model and get a diagram for the carb under oem parts
a back fire on a bike is usually the cause of timing being out or damaged carburettor ( too much petrol going through ) in the case of the carb you can adust the air screw to see if that helps ( small screw in the side of the carb ) screw it right in and then bring it out 1 and a half turns ,this will get you very close to the right mixture. in the case of timing being out you will need to take the fly wheel off and adjust the stator plate ( turn it to the timing marks ) as a rule its usually . back fire through the exhaust is timing,back fire through the carb is fuel mixture. if you rev it when it starts and it pops through the exhaust the problem is within the fly wheel . if it pops through the carb the problem is with mixture.
Hey Anon,
Cleaning a carb is not an easy undertaking,, there are several tiny passages, tiny jets, and the needle/seat assy, If you are not trained to know these.. you may not get the carb as clean as it needs to be... Install a new spark plug... a new air filter.. and get a qualified pro to clean and set the carb.
Carb is dirty . remove it and clean it with solvent and comp. air . then do a visual inspection on the interior of the fuel tank . sounds like you have aquired some dirt . Good Luck
Hi Shawn, Check the ignition timing and inlet manifold gaskets and all vacuum hose connections. If all is okay carry out a compression test, looking specifically for burned valves, but timing would seem to be the likely problem. Regards John
Could be flooding. That usually only occurs when you have excess fuel lighting off in the exhaust. I have seen it happen on cars when the timing is way off. I would pull the carb and check the float level and replace the float valve.
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