Correct throttle return spring color.
 

Does anyone have the original throttle return spring #9789460 or documented the color of the 1970 RAIII throttle return spring?

yup mine was yellow

Might the 1970 RAIII and RAIV springs be different? Maybe so. But I did see a 5,000+ mile 1970 RAIV Judge at the 1984 POCI convention with a blue spring--still have the picture of the engine. I also took note of this because my original had no color left on it.................

I thought RA3 was a dark blue, thinkin the yellow ones were for the older ones, 389's?