Spark Plug heat range for 1985 / 1986 R's

[crackshot]

What are you R riders spark plug range running?
I have mild mods, 40:1 synthetic oil and outside temp is 80 to 90 degrees.

Had a BR9ES foul out on me 1st ride out.
Threw in a spare BR8ES and rode the rest of the weekend on that and seemed to run fine but was not too harsh on the trike. Just trail riding and a few areas here and there to WOT.

[BOB MARLIN]

I run 1 step hotter than stock. If I don't it will foul.

[crackshot]

I run 1 step hotter than stock. If I don't it will foul.

Any mods?

[jenndnn3]

All I ever run is BR8's in both R's .. Heck I think I run those in the blasters too,, but you know I really need to look..
I really do not like running 9's,, all my mods are listed somewhere...

[BOB MARLIN]

I think the 9's are stock, not sure. I think that makes the 8's 1 step hotter. The only mods I have are FMF fatty and a uni air filter.

[crackshot]

Yeah I think everyone is running 8's. With modern synthetic oils, seems like 1 range hotter compensates fouling.

[ridetrikes250R]

BR8ES never had any probs, Ive run that on everything from Race gas to pump and never had a problem

[Gdkarma]

interesting, I have NOT tried a hotter plug for some of my problem 2 strokes......just bought a 10 pack, gonna see if that makes a difference!!!:headbang:

[NINJA]

8s are the hot ticket. That's what I run too.

[NOS_350X]

B8EG,

In my banshee i typically have between a b7eg-b10eg and at races rather than rejetting as the nights get cold i will just swap plugs