I hadn't thought about 6mm bore pinions, actually - even with this motor I think the demand will be quite small in the grand scheme of things. If I did do hardened 6mm pinions, I wouldn't offer the whole range for sure.

Any chance of getting you to make some of these? What options would we have as far as pinions? Because I like to run huge tires I need a smaller one than others are going to need so I may be SOL but it would be nice to have some for the other people that don't need smaller pinions (I'll need 10-12T). I may also mod my CD mount to accept a 51T spur, which would open up a lot of gearing options.

Ya ditto...also I would buy a couple 6mm pinions:yes:

Put me down for several.....

Maybe Castle could send folks looking for 6mm pinions your way...

Here is a picture of how my shaft re-size turned out. A good digital caliper is a must. I also kept an old rotor magnet close to the grinding to snatch any metal bits in addition to punching the shaft out of a zip lock bag. http://i300.photobucket.com/albums/n...d/DSC07227.jpg

Nice job on that

Looks good man. Picture kinda says: "Hey, look at my "shaft"!"

It's here! I think I'll just grind my shaft down, I've been waiting for nearly a year for these to come out so I'm a bit uneasy grinding it down but here goes nothing...

The pics (and a little hand porn):
http://i140.photobucket.com/albums/r...h_DSC00038.jpg
http://i140.photobucket.com/albums/r...h_DSC00039.jpg
http://i140.photobucket.com/albums/r...h_DSC00041.jpg
http://i140.photobucket.com/albums/r...h_DSC00042.jpg
http://i140.photobucket.com/albums/r...h_DSC00044.jpg
http://i140.photobucket.com/albums/r...h_DSC00046.jpg
http://i140.photobucket.com/albums/r...h_DSC00047.jpg
http://i140.photobucket.com/albums/r...h_DSC00048.jpg
http://i140.photobucket.com/albums/r...h_DSC00049.jpg
http://i140.photobucket.com/albums/r...h_DSC00054.jpg

This thing is massive, in person it just dwarfs my 2650. I haven't run it yet, but THANK YOU CASTLE for making this motor. I really wish the Monster Truck versions would come with a shaft suited for a Monster Truck pinion but hopefully future versions will have a 5mm shaft. This should be all the motor we can handle for 1/8th scale.

aargggh, mine is not here yet.

Got mine 2 days ago. Definitely want to look into overcoming the 6mm obstacle and using it on my Muggy.

I bought a 3" pocket stone (coarse, of course) from Ace hardware and permeated the thing with 3-in-1 oil, hooked up the 1717 to my MMM, and held it at full throttle for short bursts while I pressed the stone into it. I only do short bursts and then stop to let it cool but so far I've been at it for 2 hours and still have some grinding to do before it's done. I tried a magnet and a paper towel but nothing seemed to be able to keep all of the metal shards out of the front bearing and now it's making a bit of noise. I've been cleaning it out and flushing 3-in-1 oil through it but I suspect I will need to replace it :diablo: Why oh why couldn't they give us a 5mm shaft....

Plastic baggie is your friend... Put the motor in, seal it up and push the shaft out. You motor is sealed.

I am really not looking forward to doing this when my 1717 comes in...

Hmm, that could work as long as the friction between the shaft and the bag isn't too much. I am ordering a new bearing anyway, by the time I got the shaft ground to the point that I could get the pinion far enough on the front bearing was seriously jacked up. I measured it at 6x16x5, shouldn't be too tough to find...

Looks like Mike is gonna have to start making some Mod1 and Mod1.5 pinions with 6mm bores. Turning down the motor shaft sounds like too much of a PITA IMO.

It is a major PITA. Took me about 3 hours, a lot of patience, and wore through part of a grinding stone. Should prove to be a very good shaft, judging by what it did to my stone :lol: