Hey guys new to forum but not really RC. Question is anyone running the Walbro 990 carb? Is it direct bolt on? I know there's no choke. Was told it was direct bolt on no prob with linkage etc. Was told that's best carb for these engines. I've ordered a Walbro 668 also just in case. The stock carb diagram crapped out and runs like crap and primer bulb doesn't hold fuel at all. I also ordered a new fuel tank and lines. If the walbro 990 is that good I'll order one for my chimera also cause choke lever is busted on it. Also noticed that all my redcat don't run on 32:1 mix but fire right up on 25:1 is this normal? My 5b would run fine on 32:1.