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speedfight2 non-start
first of all an apology: i know it's likely that this topic has been discussed in the past. i HAVE tried to do a search, and read many threads already, but have been unable to solve my problem so am posting a new thread. please be gentle with me :)
i have a speedfight2. it used to run. then it sat in my shed for a couple of years. now i cannot get it started. i currently have it connected to a good battery, i have checked spark (both seen spark on cylinder head and using a spark tester), i have fuel flow (with fresh fuel - checked carb, pulled hoses, observed fuel flow), i have removed exhaust in case it was blocked, when winding engine over using starter can see exhaust/unburnt fuel exiting exhaust port. i have checked compression and it has 60psi (i do not know the spec for this though so this may be too low?) do all speedfight2's have an immobiliser? i didn't think mine did, but have read this as a possible fault on previous threads. could it be the auto-choke? i don't know a lot about these electrics on scooters aren't a strong point, but i would expect that if fuel is getting in, there's a spark, and a free exhaust... then the engine should run surely?? i am at a loss... can anyone help?? many thanks in advance! Andy |
Re: speedfight2 non-start
Red light on the clocks ?
Clean carb? My friends speedfight did this it was the immobiliser |
Re: speedfight2 non-start
ok so i reattached the exhaust just to double check the compression stayed the same. it stayed at 60psi.
i then noticed my compression tester was using a rubber extension hose... surely that would swell and affect the pressure reading?? so i removed that and connected directly to the metal connector. compression went up to 80psi. better but still too low. so i put a little bit of oil in plug hole and refitted the spark plug. when i thumbed the starter it still didn't fire but did cough, once. encouragement! i put my thumb over the exhaust and after a few spins the engine fired! it started!! :D i can only assume that blocking the exhaust momentarily, increased the pressure in the cylinder and helped the fuel ignite? lot's of smoke but it's running. happy days! |
Re: speedfight2 non-start
Maybe could do with a de-coke
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Re: speedfight2 non-start
in reply to your original message renaulttom, there are NO lights on the dash, which is strange, but then i dont have all the lights etc connected at the moment.
yes a de-coke sounds like a good idea... umm how does one do that?? :o |
Re: speedfight2 non-start
head off clean it of all coke clean the top of the piston when the piston is in the barrel check for any play
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Re: speedfight2 non-start
Quote:
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Re: speedfight2 non-start
You can remove the head and clean it all up and if you have a blow torch clean the exhaust port then dip it in oil
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