RBs What mix are you using

[carlos fandango]

Following on from Yam-lams post re TS1 mixtures i thought i would start one for RBs

I ran my RB20 on 4% fully synth while running in, then after a dyno run and asking around, i started using 3%
But on the way back from IOW last year i had crank faliure this was put down to the AF crank bearing cage collapsing ( however it had been welded after it twisted previously)
Then after reading the revue of the rb250 in scootering Ray said to go no lower than 4% due to the inlet feeds going straight into the transfers and bypassing the crank. This made me think about it more
So what are people using and what sort of mileage have you done?

Russ

[rbgaz]

2% af crank done over 6000 miles

[peter357bikes]

4% 1600 miles no sign of any wear at all............

[eibargum]

3% MX5, 5,000 plus miles, no issues .

[22/2]

4% ish Rock Oil Synth 2, Taffspeed 6 port 250, not sure how many miles but in the thousands, been together for 20 months, few rallies and a few sprint meetings still as good as the day it was built. went with 4% because of AF's recommendations and as they were new kits I don't see how you could complain if it went wrong and not followed their advice, had no trouble so stuck with it.

Rich