2007 Attak hard cold start problem

[NHBoy]

Picked up a nice clean 2007 Attack. 10K miles. Previous owned changed the donuts and plugs for this season and then sold it o me. My issue is when it sits for more than a day when I cold start it it will crank for about 6 seconds, then start, got to crack the throttle some times. Put a new battery in it as I know they are fussy with low voltage. Once it is started it starts fine the rest of the day. Previous owner says it always started quickly. Any thoughts?

Thanks

 

[watersuper]

Would be looking at a leak in the exhaust system, probably y pipe flanges.
Had the same problem last year on my 07. SS pipes fixed the problem.

 

[maim]

How old is the gas in the sled?

 

[NHBoy]

Donuts were changed as well as both y pipes. Gas is fresh. Taking it out this weekend. I'll update with how it starts. Thanks for the, replies.