If your going 5s on the XT8 and going with Tekin, get the truggy 1550 motor. Its all you could ever need on the track, drives great, gives awesome run time, and runs cool. I am assuming this will be for track use. If you want to just bash and want a little more edgy feeling setup you can go with the 1700kv truggy motor. Still a great raceable setup but much better suited to the heavier truggy than the 1900kv buggy motor.
EDIT:
Quote:
Originally Posted by Jabe
I think ill go Tekin 1900kv buggy motor on 5S it makes ~35k rpm, since using 4S id get 40k rpm or 30k rpm on tekin buggy motors.
Or should i go with 30k rpm on 4S and gear higher?
Could someone that has 808 mount, get me these dimensions?

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To run the 808 mount you would need to run a smaller spur. Its sized to work with the 42T center gear on the 808. The XT8 runs 48T. I had to shim the 808 mount up 2mm to run the 46T slipperential in it so you would have to shim it anothe mm or 2 beyond that to run the 48T center gear.