GN250 not starting?

[simbak]

Hi

After being hit by a bigger bike and writing off my scooter, I decided to buy a bigger bike.

Being the n00b that I am, I've most likely posted this in the wrong place.

I own a 2006 Suzuki GN250 purchased privately approx 2 months ago.

It was running a little shady when I bought it. Basically it would cut out while idling although not all the time. Quite annoying at lights etc but would start up again straight away. I asked the previous owner about this and basically he said it could be gas that had been sitting in there for 5 months. I changed the fuel and she was running fine apart from the odd cut out.

I didnt use her for approx 4 weeks and it wouldnt start. It would turn over but not fire.

I charged the battery, bought a new spark plug and it fired straight away. I left it running for about an hour before it started cutting out again. ie not being able to idle. After a few more cut outs it would then not be able to start.

I waited till the next day and then it started again but didnt last long before cutting out. Now I'm back to the stage of it not starting at all. Even with a jump start.

The battery is charged, the fuel is fresh, the spark plug sparks (tested), now quite dirty again.

Couple of colleagues at work said to put some meth down the tank but to clear some possible water?

Any tips or help would be greatly appreciated. :beer:

Cheers

[sunhuntin]

get the regulator checked. mine did the exact same thing, and was from the same year. basically, the battery isnt holding the charge, or isnt getting the charge at all. i would ride mine for an hour after an episode to charge it, but the next day, same old story.
after it made me late to work one too many times, i took it in to get checked/fixed and decided afterwards to not bother and traded it in. had been a year of fights due to things falling to bits or not working. i only put 10thousand k on it, and the amount of time it needed repairs was beyond a joke.

[KrazyGixxerBoy]

If it's not the regulator it maybe carb jets blocking...is there crap in the tank? Could pull them apart and blow some air through the jets....

[simbak]

Thanks for the responses. Is there a way I could test the regulator/rectifier myself (without the engine running)? I'm pretty sure the battery stays charged as it turns over easily. Could check the jets tomorrow.

[jimbo]

Also check breather to feul cap not blocked and aiir filter(washable)not choked up Good luck

[simbak]

If it's not the regulator it maybe carb jets blocking...is there crap in the tank? Could pull them apart and blow some air through the jets....

I've checked the air filter, its fine, looks as good as new as still has an oily feel to it.

How would I check the carb jets? Are they the black fuel lines (one running from fuel tap to carb...

After looking around I noticed 2 black pipes. 1 happened to be completely free and not connected to anything, near to the left of the battery heading straight down and the other was coming off the carb also going down. There is also a clear fuel excess line heading down.... Photos attached.

Thanks

[Squiggles]

One by the battery goes to the wee spout on the end of the batt, the other one coming off the carb is a vent. Jets etc are inside the carb, search out the manual on here and have a look at it, not much detail in the fueling section but you'll know what you're looking at.

[CookMySock]

Thanks for the responses. Is there a way I could test the regulator/rectifier myself (without the engine running)? I'm pretty sure the battery stays charged as it turns over easily. Could check the jets tomorrow.Search KB as there are a lot of posts on regulator testing.

It sounds to me like you have a fuel/carburation/choke problem. Answer as many of he following questions as you can ;

When you pulled the spark plug out was it really sooty and black?

If you put your finger up the exhaust pipe is it really sooty and black?

Are you sure the choke is turning off properly?

Does the bike start really easily on a cold morning without using the choke?


Steve

[simbak]

One by the battery goes to the wee spout on the end of the batt, the other one coming off the carb is a vent. Jets etc are inside the carb, search out the manual on here and have a look at it, not much detail in the fueling section but you'll know what you're looking at.

Thanks squiggles!

[simbak]

Search KB as there are a lot of posts on regulator testing.

It sounds to me like you have a fuel/carburation/choke problem. Answer as many of he following questions as you can ;

When you pulled the spark plug out was it really sooty and black?

If you put your finger up the exhaust pipe is it really sooty and black?

Are you sure the choke is turning off properly?

Does the bike start really easily on a cold morning without using the choke?


-------------------------


Steve

Hi Dangerous

Yes, spark plug was sooty and black. Cleaned it as well as using a new one and they both work fine. The exhaust is also sooty and black.

I'm guessing the choke is turning off. I have used it previously to start on a cold morning, although it hasnt been tested too much.

Couple of other points to note. The revs/idling seems to have a mind of its own. Can some time fllutter up and down by approx 200 - 400 rpm and throttle can also get sticky. It can idle for about 5 minutes before cutting out by itself.....

Thanks

[The Pastor]

yeah i'd check the choke is in the off postion and not the on postion.

[simbak]

Thanks. It's definately in the off position (pushed in)

[simbak]

Dropped it off to the shop today. They think its the carb jets. See how we go. The bike did sit around for about 5 months before i bought it which most likely would of caused the whole issue

[simbak]

Hi All

The problem was due to a dirty Fuel Bowl.

The bike is now running mint.

Thanks for your help and suggestions.

Cheers

Simon

[CeeBee]

To check the battery charge circuit you need a digital multi-meter, connect to the +ve and -ve battery terminals and hold revs at 5000rpm, voltage should be 14.8v, any higher or lower MAY be regulator assuming battery is in excellent condion and fully charged. Any degredation in battery performance will affect these voltage readings. If you live on the Shore I can check for you for FREE.