bought this sled for $100.00 bucks.thought woooow!!!!! Got it home and tried to start it,after 100 or more pulls it started but only on one cylinder.thought aaaaahhhhh!!! got it rebuilt for $$$$$$.Checked out all the posts on this awsome site and learned not to run it without air box,as it didnt come with one is that the probable cause of meltdown?
hole in the piston on recoil side. when my dad and i got it runnin only one side got warm and sled wouldnt really move.after the rebuild the mechanic ran it all around and showed me some odds and ends but wasnt concerned about the airbox so i was wondering
On the sleds that came with air boxes, the carbs were jetted for the restriction of the airbox. If the engine is run without it, it will run too lean, and sooner or later will burn down the engine.
'09 Vintage Challenge Survivor, and I wasn't late for supper!
'10, '11, '12, '13,'14,'15,'16,'17, '18, 19, 20, 21, 22 Vintage Challenge Survivor !
72 400 restored, Father bought new in '71
73 X8 restored
'74 340 green machine
'74 X8 9 time VC finisher
'78 Spitfire in progress
2 '75 340S 1 running, one on deck
'78 LF 440 future CC clone
'73 Skiroule RTX 440, 500 mi.
Got it home and tried to start it,after 100 or more pulls it started but only on one cylinder.thought aaaaahhhhh!!! 
got it rebuilt for $$$$$$.Checked out all the posts on this awsome site and learned not to run it without air box,as it didnt come with one is that the probable cause of meltdown?
Matt - JDsleds.com Administrator