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How to check for spark

Also changed fuse as well drained carby fuel still will not start

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Take off the spark plug, plug it into its cap, touch its threads on an engine's bolt and hit the button. You should see spark on its tip.

Posted on Feb 10, 2012


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Posted on Jan 02, 2017

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SOURCE: Carbies willn't set float level,right floods,left sets to low

I don't know if its any help but I've fixed my Honda with similar problem. It turns out I reassembled the rich carbys air cut off valve incorrectly. Have you checked yours? I'm wondering if the cut off valves somehow affect the other parts of the carbys. Mine is running sweet now.

Posted on Apr 24, 2009

SOURCE: honda vt 250 will not start

Hi Dino,
You have sparks and the carbys have fuel in crank it and it doesn't fire up.....have you tried to use the choke?
After a lot of cranking remove one of the spark plugs and see if its wet with fuel.
I feel probabely the fuel is not entering the combustion chamber.

Posted on May 25, 2009

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Posted on Feb 13, 2010

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SOURCE: Fuel goes from tank to

standard diagnoses procedure - make sure you have good compression, make sure you have spark, make sure you are getting fuel to carby, if you have compression & spark and fuel to carby bowl then you probably have blocked jets in carby

Posted on Sep 02, 2010

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SOURCE: hi i have a yamaha

Try some spray starting fluid.
That will prove whether or not the spark if ok.
Make sure there is gas in the carb.
The tank may be clogged or the carb float valve could be stuck.

Posted on Dec 20, 2010

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Hi guys, Im having a problem starting my aprilia milli 2002 ,battery sounds strong and theres petrol in it, its turning over but wont start,checked obvious fuses and there fine ,I also put the standart can...

have you tried changing the spark plug if not check for spark at the plug ,if you have spark it could fuel not getting to the carby hope this helps

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89 mitsubishi carby model has spark and pumps fuel to carby but the spark plugs are dry just keeps cranking but wont even try to fire also has good comp,was driving till water pump blew now just wont fire...

Check that the fuel pump is working and pumping fuel (fuse or burnt out) as it sounds like there is no fuel in the carby. To check if the engine is going to run remove the air filter from the top of the carby and pour about a table spoon of fuel directly into the carby throat. Replace the air filter and crank the engine. If is going to run it will fire and then stop

Feb 20, 2013 | Cars & Trucks

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2002 XR 200 sat for about 6 yrs with no attention. I drained the fuel, cleaned the carb, changed oil, new spark plug. still won't start. what next?

Remove the plug lead and plug. Earth the body of the plug to the barrel. Kick and check for spark.
If no spark you have found a problem.
If you get spark the problem is most likely the carby.
Remove the float bowl from bottom of carby and check that both jets are clear.

Aug 16, 2010 | 2002 Honda XR 200

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It will start but wont keep running

tip all the gas out.drain the carbie bowl.put fresh fuel in.drain the carbie bowl till fresh fuel comes thru,retry starting.put a new spark plug in

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I have a yamaha ttr230 and since i have pulled it out of storage this spring it cant make it run right. It starts fine and idles but a soon as any throttle is given it dies out . I have put fresh gas in it...

G'day, sounds a bit like the float valve in the carby might be stuck nearly shut or just some moisture in the carby, a light tap with the handle of a screwdriver on the side of the carby bowl should fix it if it's the needle stuck shut (happens from sitting sometimes), or maybe try loosening the drain screw in the bottom of the carby bowl to drain any water etc out, hope this helps :)

Apr 11, 2010 | 2004 Yamaha TT-R 225

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I have a 1983 suzuki gs 400 e and cannot get it to run i think its the timing and would like any info on how to time it

G'Day jesse,
This model GS has electronic ignition, so there is not much to really adjust for timing side of things. Once set, that is it.

Here are some things you need to check first to see why the bike may not start. I would suggest initially to check that there is spark by removing each plug in turn and check that when being cranked, you have good blue coloured spark. Be sure not keep the plug well grounded when doing this as coil damage can result is you don't get the spark to earth.
If you dont have spark then you need to work out why not. It may be a coil, TCI Ignition module, or less likely inductive pickup sensor. Checking for blown fuses and good power supply to the coil and also to the control module is a good start here.
If you have spark, next thing is to check you have compression. Buy, borrow or steal ;) a compression tester. If need to have at least 100 lb compression for the pick to fire. Check out this guide on compression testing.
If you have good compression, you most probably have a carby problem. Be sure to drain the carbies and tank, fill with fresh fuel before you do anything else, and try starting it again. Carby problems always involves removing the carbies and FULLY dismantling them then thoroughly cleaning all parts, galleries, jets, passageways, of fuel varnish and dirt. Use carby cleaner, and compressed air to blow it all out. Check here for Dans excellent guide to overhauling your carbies.
Always work with a fully charged battery, fresh fuel, and perseverance. you will get there in the end:) I have barely touched on what may be the problem here. More than Happy to talk to you more about this. Good luck :)
regards robotek

Apr 07, 2010 | 1978 Suzuki GS 400 E

1 Answer

Honda vt 250 will not start

Hi Dino,
You have sparks and the carbys have fuel in crank it and it doesn't fire up.....have you tried to use the choke?
After a lot of cranking remove one of the spark plugs and see if its wet with fuel.
I feel probabely the fuel is not entering the combustion chamber.

May 25, 2009 | 1986 Honda VT 250 F

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