Ill try to make this runnup to my problem quick because i know no likes a long story.
Bought a used 04 290 a couple weeks ago,worked well,brought it home,worked well.Started ripping thru it and doing some service on it since it seemed like it had been neglected.Did all the normal stuff,changed the oil,cleaned the carb,air filter,greased bearings blah blah blah.
Tried to start it yester day and it starts but runs like crap,as soon as i pop it into first the bike wants to take off,strange ,didnt do that when i got it(wrong oil?i used 10w 40 automotive oil,probly gonna change it again to amsoil dirt bike oil).Rip down the street and the bike dies and wont start again.Pop the plug off and put a tad bit of gas into the cylinder,kick it and she fires up but dies.
Today i pull the carb and find that one of the lines has a cut in it,that must be the issue,its sucking in air.new line,doesnt work.Pop the carb off and clean it,check the reeds,checked spark(great),petcock,fresh gas.Pop the header off because it didnt look like it was sealing well and drop the header by accident,tons of gas pours out.Buddy comes over and were chatting and i decide to pop the carb off again and so i take the air box off,feels heavy,its full of gas!!Ok,must be floats or the lines on this carb are wrong(does a deloorto have breather lines?),i try to kick the bike over to get the gas out of the head and gas gets coughed up out the exhaust at the head BUT heres the great part,as im kick i see bubbles coming fromt the ignition cover,take that off and gas comes out of there too.
Im thinking the lines on the carb got routed badly(see picture) and that filled the header and air box with gas and due to kickin it repeatedly the gas compressed and had nowehere to go and so it blew the crankcase seal.
Can anyone chime in on this?
Thanks