[lincpimp]

Ok, if you run the flux center shaft/gear in the x tranny, pn hpi100905, it is just like locking the X tranny in 1st gear.

With that tranny ratio and your 6s/1600kv combo you could run a 52/25 spur/pinion combo. That would get the motor well away from the tranny. If the motor mount does not have enough adjustment, you could go with a 47/23 spur/pinion setup and that would yeild the same ratio (about) I figured that you are using 40 series bowties (by the pics) which are around 5.75" tall.

Set the motor and mount up with out a pinion, and place the battery in the chassis, adjust the motor as close to the battery as you feel comfortable (leave 1-2mm between) and measure from the center of the spur gear to the center of the motor shaft.

The 52/25 combo would place the center of the motor shaft about 40mm from the center of the spur, the 47/23 would give around 37mm. Your 52/17 combo is about 36mm, so the 52/25 would most likely get the job done.

Plus you only need to buy the flux center shaft/gear and the 25t pinion from mike, (25-30 bucks for the 2) which is much cheaper than another lipo or motor...

Calc info for the 52/25 gearing with flux tranny ratio:

Differential Ratio: 3.3076923076923075
Transmission Ratio: 2.215277777777778
Other Ratio: 1
Spur Tooth Count: 52
Pinion Tooth Count: 25
Total Voltage: 22.2
Motor KV: 1600
Tire Diameter (inches): 5.75
Tire Ballooning (inches): 0
Motor Current Draw: 0
Motor coil Ω: 0
Spur/Pinion Ratio: 2.08 : 1
Total Ratio: 15.24111 : 1
Tire Circumference (inches): 18.06 inches (458.83 mm)
Total Motor Speed: 35520 RPM
Vehicle Speed: 39.87 mph (64.04 km/h)
Effective KV Value: 1600

If you have room you can run the smaller 49-47t spurs to up the speed a bit...

I went thru all of this with my flm chassis savage... Hope the info helps! And keep in mind with the flux internals on the tranny you can use motor brakes and motor reverse, instead of mech brakes.