HFT Swash Plate electric motor

Knob

Member
Site Suporter
It seem the HFT swashplate moving electric motor will live on DN for about 100k km, maybe a bit more. And then it seems to fail, at least in some cases. Mostly the motor's permanent magnets seem to break loose. This small electric motor is a soft spot of the DN-01.
Without this motor the DN will not go nowhere, some of those Honda stealerships may suggest you to buy a full new HFT unit for $6000 as a fix...
And this small electric motor as a spare part is priced by Honda also pretty high. Dealers probably will not keep it in warehouse therefore time of delivery may be long. This is one unpleasant situation.

So I decided to look around for maybe there are some aftermarket motors available while wheather is still good.

Have to say I couldn't find any aftermarket swashplate electric motor for DN available. Sadly and sorry.

Found out that very similar motor is used on some Honda ATV's with similar hydrostatic transmission. BTW they call it Hondamatic, not HFT on ATV's, but basically these transmissions are very similar.
And this very similar electric motor for ATV transmission as aftermarket component (from our colleagues in China) is available for around $40...50 USD, this is for about 10x times less than the motor for DN as a Honda OEM part (probably also produced by our colleagues in China, as Honda uses a lot of components made in China nowadays, even on DN).
Looks like worth to check it out, eh?

So I got my hands on both versions of those electric motors, the aftermarket one for ATV and another OEM for DN.
These motors look like twin sisters at first glance! No big differences, same kind of installation surfaces, same kind of electric connector, same outer dimensions, same kind of O-ring gasket... BUT!
The electric motor for Honda ATV transmission has 11 teeth on it's axle. And motor for DN's transmission has 12 teeth on it's axle!
Did Honda hired some really bad minded engineer to work for them or is it arranged by demands from the pure evel himself working in their marketing department??
So otherwise these motors look exchangeable, only there is a different amount of teeth on axles. And therefore the axles diameter differs also a bit. And no - these motors from ATV and DN are not direct replacement for each other!

But this is not yet the end of the story! I'll open these motors and will take a look inside of them. There may be a possibility to exchange the shaft itself, it seems to be removable. Or maybe the part with permanent magnets may be usable from the aftermarket ATV-version, because the breaking loose magnets seem to be most problem part for these motors. Or maybe we can figure out some more use of those cheap ATV electric motors to fix the expencive DN's motor...
So the story will continue.
Meanwhile enjoy the photos about the both electric motors.

01a.jpg 02a.jpg 03.jpg 04.jpg 05a.jpg
06a.jpg 07a.jpg 08a.jpg 09a.jpg 10a.jpg
 
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Knob

Member
Site Suporter
Yes indeed it may be possible to install the rotor from one type to another. But.
A bit confusing is I see there are available two versions of the ATV shift motor, both ment for the same ATV model and production year, but one has 12 teeth and another has 11 teeth. Like these ones:

- 12 teeth seen on photo:
https://www.ebay.com/itm/271288428364

- 11 teeth seen on photo:
https://www.ebay.com/itm/174901092949

The third possibility may be to take from el cheapo motor the new part with permanent magnets and use it on DN's original old motor, possibly it will fit. And let the rotor itself to be restored, if needed. I know at least those guys who service the professional power tools are capable of performing this kind of service.
 

Alexandre

Member
Second link point to an equivalent to Honda ref 31300-HN5-A11, can't see a Honda ref for model #1... By the way, I visited the maker's site https://caltric.com/c-1390556-powersports.html but no mention of power shift motors and can't find a catalog. But they seem to have many starter motors - which I guess is another cross-exchange possibility!
 


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