Kx 65 - Any Smoker Expert In The Hoos?

Warm the plug with a blow torch for a few minutes to get it to say 200'C and burn off contamination and try again.

Reinstall hot (don't burn your hands).

My RG250 used to be a BITC#and that would be the only way I could get it to catch some times..

Worth a try.

 

Is fuel getting into the engine, if the carb getting fuel then next is the carb.

Extreme but spray a Little Start/carb cleaner into the intake if it runs then it’s your carb and it needs cleaning.

 

I,m assuming its got plenty of compression ? If not ,a competition engine won't like starting .Try bumping it ,if it starts up it might be time to stick some new rings in and if needed a piston . Lovely to work on and should take a hour or so .

 

When I used to trial air cooled ty 's I used to fit new jets and seals regularly (jets n seals were cheap as chips for the ty250) and new plug. ultrasonic I found was the best method of jet cleaning.

I always took the carb back to factory settings as I'm not clever enough to play about with different jet sizes or needle settings.

stinkwheels eat plugs and is always a good idea to have a few new ones about you.

You'll get used to tearing the carb apart, it's something you do regularly on two strokes.

They're very satisfying to work on and get running sweet. I'm assuming your kx is electronic ignition is it?

 

Sounds like it needs a new radiator, may I recommend Ducati Glasgow as I hear they have them at cracking prices.

 

Assuming you've checked everything else, fuel, spark etc, carb. First thing I'd do is pull the barrel off, might have nicked a ring, assuming it does kick over, keep kicking its only going to cause more damage.
Last time I blew my bike up, there was bits of rings etc in the front pipe and could see the damage even without taking the head off.
If you do it, check crank etc, if all OK, worth throwing a piston and rings on her.

Oh and change oil

 

You mixed the right amount of two stroke oil into the fuel?
If it started and ran well before, start with a clean plug, fuel on, choke on, quick kick-kick-kick should always wake it up.
These are normally very simple to start, as kids need to be able to get them going on their own.
If it takes a lot, I would suspect crank seals making the mixture weak- made worse if left standing with ethanol containing fuel.

 

How long since it’s been running regularly? I’m with @DucatiScud on this one, fuel’s getting to the carb but is it getting into the piston? You may find you have a gummed up carb.

 

small 2 strokes love a clean carb. it doesent take much to stop it starting. take it off, clean and blow it out. especially the pilot jet.

 

When my lammy used to flood, which it did often, I used to put a match to the spark plug hole to clear it. Always worked fine for me.

 

Were you not tempted to just put a match to the whole thing on occasion…….

 

Sometimes, but they were so unreliable they wouldn't even catch fire at times.

 

Edit: I also did this to my 300EXC. It clears the fuel, you get a nice thwoomph and a jet of flame out the plug hole.

 

aye, the old match down the spark plug hole trick. it can work a treat.
it just so happens, in this very hour i have just got my old strimmer going. 20yr old mcculloch, starts every spring with out fail, as it did this year. ran it once back in may, went to start it a week later, nuffink. tried evey trick under the sun. still nuffink. i'm at work today to finnish somthing off, blew the carb out, boom.
same with my sons old quad. run it once after its been sitting a while, park it up till the following weekend. nuffink, take the carb to work, blow it out. particularily the poliot jet, boom.

 

I recall the amount of scooter it’s you’d see in groups huddled round a scooter at the side of the road. No wonder they’d wear Parkas getting pissed on with a pocketful of spares.

 

It wasn't unheard of to rebuild a lambretta on the side of the road. Using coke cans for new head gaskets. But mostly it was grit on the spark plug electrode due to running open bell mouth carbs. Or a snapped throttle/clutch/gear cable. Our collective tool boxes were often full of tools and spares. Vespas had it easy, they just ran and ran. But Lammies! Any that wasn't standard, broke down. Eventually. Usually miles from anywhere. In the dark and it'd be raining.

 

Much preferred the Lamms style wise, I briefly owned a Lambretta swapped it for a Kwacka.

 

Take the carb off, give both the the jets a blow out and clean the float bowl out of any shite. Theses little carbs gunk up after a very short time. Its only two jubilee clips and undo the throttle slide to whip it off.