Back fire on start up

[Allan]

2016 stx dx 146 , stock.
I have never had this problem before but 2 out of the last 4 times I stared the machine it backfired (small ) and started up. Once warm and once cold.
Sled now has 13700km . Put new plugs in at 13200km.
Any think I should check?

 

[drumz11]

Got the newest flash? Heard of it happening with a bunch of sleds but haven't seen it with ours and the new flash yet. How cold was it?

 

[Allan]

Got the newest flash? Heard of it happening with a bunch of sleds but haven't seen it with ours and the new flash yet. How cold was it?

Got the new flash last year and never had a problem. Only happen twice this year once at cold start up -10c and once when warm.

 

[cannondale27]

Got the new flash last year and never had a problem. Only happen twice this year once at cold start up -10c and once when warm.

Have you changed the way you start it since last year? Even though I have the new flash I still keep it cranking for 3 count even if it happens to start right away. I never cycle the pump either. Might be something that will work for ya. Check over exhaust good too. Leaks can do a lot of damage to sled.

 

[Allan]

Have you changed the way you start it since last year? Even though I have the new flash I still keep it cranking for 3 count if if it happens to start right away. I never cycle the pump either. Might be something that will work for ya. Check over exhaust good too. Leaks can do a lot of damage to sled.

No never changed anything when it comes to starting. don't see anything wrong with muffler from looking but never checked header . Going to start it again and check gasket to see if it blew out and check muffler when going.

 

[Allan]

Have you changed the way you start it since last year? Even though I have the new flash I still keep it cranking for 3 count if if it happens to start right away. I never cycle the pump either. Might be something that will work for ya. Check over exhaust good too. Leaks can do a lot of damage to sled.

started sled again this evening and never cycle the pump just on the key right away. Sled started right away not even a count of 1. Maybe the backfire was just a coincidence.( Hope so). Time well tell.
Check muffler and gasket and not problem there that I could see. Don't want to take the tank off to check header on less I got to. Hard to take tank off of mine because off all the plastic and other 16.3 liter tank in the back .

 

[cannondale27]

started sled again this evening and never cycle the pump just on the key right away. Sled started right away not even a count of 1. Maybe the backfire was just a coincidence.( Hope so). Time well tell.
Check muffler and gasket and not problem there that I could see. Don't want to take the tank off to check header on less I got to. Hard to take tank off of mine because off all the plastic and other 16.3 liter tank in the back .

Never heard of a 16 cracking header or can so probably fine. Just something you surely want to keep eye on.