Hawk 250 Issues...Carb? Fuel? Air Leak?

[Sebastian666]

So after replacing the stock carb w/30MM Mikuni Carb and running only high octane fuel, I had a failure yesterday and had to walk my bike 5x miles....Full tank, ran fine prior to leaving, standard RPM's...She started sputtering so I killed it to investigate. Then I could not get it re-started, ugh..I have't pulled the plug to see if it was fouled because it was getting dark by the time I got home. I know that's where to start.

Now, I am no expert in this field and any help would be greatly appreciated.

[BlackBike]

Originally Posted by Sebastian666

So after replacing the stock carb w/30MM Mikuni Carb and running only high octane fuel, I had a failure yesterday and had to walk my bike 5x miles....Full tank, ran fine prior to leaving, standard RPM's...She started sputtering so I killed it to investigate. Then I could not get it re-started, ugh..I have't pulled the plug to see if it was fouled because it was getting dark by the time I got home. I know that's where to start.

Now, I am no expert in this field and any help would be greatly appreciated.

Like you say, verify that spark with "the plug frame test". Fresh gas, test, then back to original carb in that order incase the mikuni got plugged. Also a wet plug would tell you if you are not getting spark and or fuel.

I still have a filter I need to put on my fuel line.

[Azhule]

As mentioned above: "Still have a filter I need to put on the fuel line"... does your bike have a Fuel Filter attached to it Sebastian?

Either way, if it does or doesn't;

I would pull apart the Carburetor and give it a good cleaning, from the sounds of it; "was running fine, started sputtering, then died/wont re-start"; it would lead me to believe the carb got itself clogged with something.

I use this K&L Carburetor Wire Cleaning Kit to poke out all the microscopic holes.



I can take and post up a few pics of the few places that usually get fully plugged/clogged... or... I'm sure you can find a few YouTube videos with help on the subject

[Sport Rider]

first thing I'd do is pull the fuel line, turn on the petcock and be sure fuel is flowing. Second is check the plug/spark. It's SO easy to pull these carbs and give them a quick cleaning, I'd probably do that. when you do, be sure to remove the slow speed needle during the cleanout. Not that it may be your problem, but I didn't do it the last time I had a problem and ended up doing it again.

Azhule has a great point with the cleaning kit, I was able to just use compressed air and blow things out. since your carb is pretty new, I gotta thing that gummed-up isn't your problem.

either way, good luck with it.

[newrider93]

FIRST OFF, Was the gas on? I know it seems like a dumb question but.....

[Adjuster]

Yep Check fuel flow first then check spark before you disassemble anything.


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[Weldangrind]

BTW, that carb cleaner is identical to a welding tip cleaner, which is available at any shop that sells welders. Might even be cheaper.