I have a 2018 850 summit sp 154 3" with 250 miles. issue i had all winter is a very rough idle that would jump around from 900-1300, but ran great when riding. spark plugs index were good, and new plugs and indexing did not change anything.
also have the same sled in a 2017 and that idles smooth from 1150-1200 all the time.
All until yesterday. While getting them ready for summer, i siphoned the fuel out and replaced with a 50/50 mix of premium/av gas 110ll and then the rough idle was gone and idles from 1150-1250.
Ran premium all winter.
thoughts from anyone that have dealt with anything like this?
also have the same sled in a 2017 and that idles smooth from 1150-1200 all the time.
All until yesterday. While getting them ready for summer, i siphoned the fuel out and replaced with a 50/50 mix of premium/av gas 110ll and then the rough idle was gone and idles from 1150-1250.
Ran premium all winter.
thoughts from anyone that have dealt with anything like this?
