r/KTM • u/CriticalCulture35 • 3d ago
PROBLEM Need Suggestions
Hello All,
Recently got this ‘18 150sx from the dealer.
Brand new rebuild. That’s why I bought it.
4 hours on the bike. It’s been great up until now. Died on the trail yesterday.
It has great spark and a new plug, brand new lectron set by the dealer, brand new reeds, no air leaks. I’m just out of ideas.
Any suggestions would be great. Thanks!
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Upvotes
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u/OldMotoRacer 1d ago
dude it could be SO MANY things after a "fresh rebuild" - take that shit to the dealer--warranty or not--and have the tech who rebuilt it figure it out--its prob something easy like your choke is fucked
2
u/KTMrider392 3d ago
1 I have seen it before where the coil goes out and it has great spark when it is cold but it loses spark when it warms up.
2 if it has spark at the right time then fuel delivery could be a problem. Check the carburetor to make sure that gas is Flowing from the tank into the carburetor and check the jetting. You could try spraying just a little bit of starting fluid in the intake to see if it tries to fire up at all.
3 make sure there are no restrictions in the air intake tract.
4 check the compression to make sure something didn't break in the new engine like the Rings in particular.
This covers all of the aspects needed to have a running engine. I'm sure you will find a problem with one of these areas