So I have been scouring the very limited selection of companies that sell rebuild kits for the 12a. I have narrowed it down to 2 choices.
The most common, and popular would probably be the Racingbeat kit. It retails for $1400..
The second kit I found is from Atkins Rotary. It has all the same parts, but is obviously a different quality of kit. They'e basic kit starts at $766.
that' a huge price difference! Even with Atkins optional parts the high end kit is still only $900.

So my question is this..
Is the Atkins kit any good?
or would I be better off spending the money in the Racingbeat kit?? I plan on upping to a bridge port over the extended port I have now. I'm also going to a Holley carb, with the Racingbeat intake.
I basically mean I want quality seals that will last awhile.
but my budget is tight as well.
I need feedback on the Atkins parts...

 

The Racing Beat kit is overpriced. The Atkins kit is a good kit and still kind of pricey. You can save money by first pulling the engine apart and determining if you need all the hard parts or not. A soft seal kit from Mazda only runs about $150.00. You will always need that but the other hard parts will depend on condition and clearances which you can't tell until you breakdown the engine.

 

For a 12a rebuild, the first thing to do is pull it apart and check the housings for flaking.

 

I'm gonna repace all the seals anyway. I could probably reuse the side seals, but I might as well just do the whole damn thing. Housings look good, one rotor has some minor scuffing from a broken apex. But it's within tolerances. It'll be fine, weve rebuilt worse.
I have just never heard any feedback from Atkins. That' why I had to ask..

 

I used the regular Atkins apex seal in my 13B for about 70,000 miles before it spun a rotor bearing. On that note I'd recommend modding the rear oil pressure regulator to bump up the pressure.
The car was used mainly on the street with a couple of track days.
The height of the shortest seal after all that is .290", tallest is .298". (Mazda's standard height is .315", lower limit .256")

Here's what the housings looked like after I tore it apart. They already had almost 100,000 miles on them before my build, and my OMP was leaking for the first couple of months.


RotaryResurrection some time ago said with his experience with Atkins' seals they require a little more oil, so maybe the shim the OMP rod to increase the dose.

 

That's awesome.
Thank you very much for the feedback. My oil pressure regulator has been hammered flat already. But I usually run a quart of 2 stroke oil threw the gas at every fill up just to be on the lubrication safe side. But I'm gonna run a Holley carb, and rb intake.
The motor was going into a b2200. Now it's going into a 78' Datsun 510. But I want a streetable build, that will last as well.