[BP-Revo]

Alright guys, I've run into a few problems with this, and have been very busy lately. I'll try to elaborate as much as I can on this.

Anyway, I first bought a E-Maxx input shaft (which includes the gears, obviously) and used a nail and hammer to pound out the roll pin. I had tried drilling it, but broke a few drill bits until my dad gave me the hammer idea.

After that, I basically took a 2.5mm hexwrench (in hindsight, I should have used a 2mm, or found a ~2.3mm bar) and used that to pound it into the hole on the Revo input shaft. The Revo input shaft comes as just a shaft - no gears, nothing. It has 3 holes. 1 for the slipper, one for some gear that is secured by a pin like the Revo sliders are to the diffs, and 1 that sticks out to have a hex wrench put in to secure the shaft when tightening the slipper on the Revo (since its hard to reach and hold still).

Anyway, mount the gear in similar oreintation as it was on the E-Maxx shaft. This means that the gear facing the slipper side, and the hole on the gear lined up with the middle hole on the shaft. Use a hammer, vice, or whatever to force the pin in to secure the gear to the shaft. Then, the end of the shaft (hole 3) needs to be shortened to fit in the tranny.

Everything else bolts right up.

Now, here are the limitations and issues I've ran into.

First is that this can only be done with the G-Maxx single speed.

Second is that the spur is just too far away from the motor mount and the pinion won't reach. However, there is a ~3mm gap between the back of the slipper plate and the motor mount plate. I also have the thicker moter mount plate as well. The stock one is 1mm thinner, which means there is even a larger gap. This measurement also accounts for the "fins" on the rear of the slipper plate, which can be trimmed for more clearance.

There are two solutions to lessen this gap. First is to drill a new hole in the shaft (hard unless you have a drillpress, but probably the most factory and cleanest looking way).

Second, and this is what I will do, as I can't get the gear off my shaft to drill a new hole, is to use a plate of aluminum between the motor mount and tranny to space the motor mount out, putting it closer to the spur.

The last possible problem is the gearing. The Revo 40T spur is quite small. I'm using MGT spurs, which come in 46, 49, and 52. Kimborough also offers 48 and 50T versions (I will have a 48, 49, and 50 to choose from). These close spurs will make fine tuning gearing easier. All that is required is a 5x10x4mm ball bearing and to bore out the existing holes on the gear to 5mm so it fits onto the "pegs" on the slipper plate that holds the spur. For reference, the normal bearing size on the slipper is 5x11x4mm. Its also possible to bore the center hole on the slipper, but I decided on getting new bearings instead.

Also, I will buying the RR slipper plate to replace the stock one. It is thicker than stock, but has no fins, so it will still be strong yet still have more clearance that a stock one with fins.

A final option I have found for those willing to run 32P gears is to buy a RR slipper plate and modify it to fit the Revo slipper spur mount area. The design of the RR slipper plate has offsets to be center the spur, and the spur is designed in a way where mounting one way makes it sit flush and the other causes extreme offset. This could be used to ones advantage to place the spur closer to the motor mount.

Hope all this helps. Any questions/comments welcome.