Ski-Doo Snowmobiles Forum banner
1 - 3 of 3 Posts

·
Registered
Joined
·
1,649 Posts
Carb jetting 1985 Plus. Curta, I have a 1985 OEM Ski-Doo shop manual. The jetting listed is the same as your green numbers ( 330/380 etc). I have usually found shop manuals to remain consistent with original publications ( just my observations). Then I have the OEM Ski-Doo 80-89 spec book. I have usually found the spec books to list specs after a "change up". In the case of the 85 Plus the book does not say a change up, but...For 1985 Plus the spec book lists the same as your red numbers P300/M350, 224AA5, 40 pilot, DH2 on 2nd, air screw 1 T out, piston valve 2.5, idle speed 1800-2000
Edit...Just checked the RV disk for 85 and 86 Plus, both same at 132/52
 

·
Registered
Joined
·
1,649 Posts
Here ya go curta. Quite a spread in main jet sizes in 85, they narrowed the spread for 86 that seems more realistic to me.
Sketch pad Font Book Rectangle Pattern
Sketch pad Font Parallel Book Rectangle
 

·
Registered
Joined
·
1,649 Posts
Pistons....I am 99.9999% sure there is no difference in 521 pistons from 1985 to 1986.
253 single, 277 single, 503 and 521 pistons are all the exact same pistons. The 503 started in 1979 and ended in 2002 ( i think). I am sure there is no difference in pistons for all the years.
 
1 - 3 of 3 Posts
Top