OK here we go!! This was a complete rebuild, it started with a 90 650 trip. Rebuilt by a pro builder with a great reputation!! All new line cleaned recleaned carbs new needle seats set floats carbs are good! The first start up was perfect did the proper break in 3 tanks of gas before I hit the bar! Then all of a sudden the ghost came out of nowhere! plugs starting to foul every ride, mmmm lets redo the carbs ran great then stared all over noticed that the fuel line were sucking air, ok new lines again, fire it up and away we go, now it wont start after sitting for 15 mins, now im scratching my head, now im not getting fuel I need to hold it to the bar pull it over 15 time, fast it starts and runs great! I read your site for all my info. Change the pulse line and fuel pump! Things are good again! Now I have a weak spark on # 2 ok snip off ends of wire and now have great spark!! So go for a ride its running flat, I open the hood in the field and now my wires are arcing all over! back to the garage insulate the wire, try to start it now im not getting fuel again,, I know this is wrong but I shot either in the air box and fire it up running great did a plug chop and it a titch lean not liking this for a new motor! sorry before all this it was running rich, now lean all by itself,, and wont fire just little sputters... like I said I have gone through this forum and read everything I can read before asking for help so this time HELP!!!!!