RC-Monster Forums - View Single Post - MM5700 in Losi XXX-T

xjbebop · 06:03 PM

I recently put a MM 6900 in my xxxt. It turned out to be "overkill" for sure!
I swapped out to a 5700 which is much better, but I still have to be very gentle on the trigger in loose dirt.
I geared way down to 13/90 before installing. The 6900 also ran too hot (almost 200 deg at normal timing!) whereas the 5700 is staying around 150 (low timing).
I'm getting ready to experiment with gearing up to see if that might reduce the initial torque (spinouts..)

Oh, I'm using 4200 stick packs.

3/28 - I changed the 13 pinion to a 17 and it seemed to reduce the wheel spin a lot! In fact, I think the truck liked the change overall (until I managed to break a front arm...)

	(#17)
xjbebop ...so much to learn... Offline Posts: 33 Join Date: Mar 2007 Location: San Diego	fwiw... - 03.28.2007, 12:41 AM I recently put a MM 6900 in my xxxt. It turned out to be "overkill" for sure! I swapped out to a 5700 which is much better, but I still have to be very gentle on the trigger in loose dirt. I geared way down to 13/90 before installing. The 6900 also ran too hot (almost 200 deg at normal timing!) whereas the 5700 is staying around 150 (low timing). I'm getting ready to experiment with gearing up to see if that might reduce the initial torque (spinouts..) Oh, I'm using 4200 stick packs. 3/28 - I changed the 13 pinion to a 17 and it seemed to reduce the wheel spin a lot! In fact, I think the truck liked the change overall (until I managed to break a front arm...) Last edited by xjbebop; 03.28.2007 at 06:03 PM.