In my opinion the B2 / B3 is a better buggy than the B4. Its easier to set up and you can drive harder into corners unlike the B4. The only thing that fits from a B4 is the layshaft and slipper assembly. Ive just fitted one as the B2 / B3 clutch isnt up to handling the power from brushless motors. I will be doing a test in two weeks time to see if the mod was worth while.
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