hossZ28
Still has a yamaha powerplant!
- Joined
- Feb 6, 2009
- Messages
- 202
- Reaction score
- 3
- Points
- 428
- Location
- Ontario Canada
- Country
- Canada
- Snowmobile
- 2014 Arctic Cat XF 7000 LTD
Ant Suggestions for spark plugs for the RS 120 motor what have you guys had best luck with or reccomend?
Just replaced with same NGK's that came with machine. 9000 km with no issues on originals, just changed for peace of mind. The old ones were carbed up quite a bit.
Nick1945
TY 4 Stroke Master
Should be NGK CR9E 
twomorestrokes
TY 4 Stroke God
stock worked best for me. tried the other heat range that a few here recommend, but couldn't feel any performance change and had flooding issues when very cold.
MadMax
TY 4 Stroke Master
Stock...... Yammie knows best.............. I changed mine once in 6,000 miles. Why you asked....... Just to see how it was done, and to have an extra set of plugs. 
MM.
I changed mine once in 6,000 miles. Why you asked....... Just to see how it was done, and to have an extra set of plugs. MM.
Nick1945
TY 4 Stroke Master
Nick1945 said:Should be NGK CR9E
Sorry about my goof, should be CR8E.......oops
CR10 EK's here
twomorestrokes
TY 4 Stroke God
Some folks swear they notice a difference. I didn't. However, the CR10EK is a colder plug, meaning it SHOULD function the same as the CR8EK until the sled is fully warmed up, then the 10's will dissapate more heat from the cylinders. The plug does not create the heat, but the higher the number the more ability it has to remove combustion heat from the cylinder. The cylinders run a little warmer with the stock 8's.
