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The Mazhatsu Rotajet

Discussion in 'General Truck Info' started by Tuskano, Mar 18, 2018.

  1. Tuskano

    Tuskano Member

    So... never realized why I have never made a build thread for this guy. So much has happened.

    So to recap, I got this guy back in Nov/Dec of 2013 down in SoCal after finding it on Craigslist there. Original owners did extra stuff to legalize it and all required was to put it all in my name. Body and 660cc engine was all that of a 94, and frame was a 75. They were selling to make some money and get more room for more toys. It originally was to be bought as a backup to my 92 3000GT SL and quickly turned into something more. Took it to car shows and meets and took it to work.

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    Mid-2014 I moved out of San Diego and up to Lemoore, CA for school (Navy guy here) and sold the SL and got a 91 VR4. Got the Hijet fresh paint. Also got the RX7 Toyo Koygo wheels re-bored on the inside to make more room for the hub and to be more aligned. The whole time they were resting on the 4 lug nuts and I had to tighten them up evenly to avoid the wheel becoming mis-aligned. Another thing I did was removing the 3 inch or so lift blocks it had just on the front. Also bought my Hello Special fender flares (which I later installed up in WA state). Another thing I did was add rhino liner... but it was a mistake as I failed to remove the fresh white paint and did the whole process backwards. So that later started bubbling off later years.

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    After school near the end of 2014, I moved up to Washington state. From there, I changed the registration and plates and all to WA state... and I sold the VR4 because why have 2 project cars when I can put all into one. For awhile I drove it as is. Then got into scootering with a Chinese knockoff of a Honda Ruckus called a Maddog to take up the backup vehicle job. I got new mirrors for that, and used the stock scooter mirrors to replace the floppy elephant ear Hijet mirrors. Gave it a nice classic feel.

    I then got into the car scene up in WA. Was big into the San Diego scene and wanted to continue with it up in Oak Harbor, where I was stationed. Went to a few car meets and shows and one day the group wanted to do a late night cruise around the island. At one point, everyone stopped and I was forced to jam my brakes. The rear lifted and (I had no bed sides on that night) the people behind me said they observed my rear lights go up to the bottom of my rear window. Something in the engine broke, and I had a shop replace it with a block I bought from Yokohama motors. I then got to rep the shop in a 4th of July parade where kids on the back of my truck seemed to pelt the audience with candy as we drove past haha.

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    I then got into driving to the mainland to go to other car meets and shows north of Seattle. My Hijet has been able to top out at 73mph and I have also had driven it once down the Pacific Coast Highway from Portland, OR to Lemoore, CA when I first went to school there. So yea, I met a friend at one of those meets who drove a JDM'd out RX7. Had the lights and everything and to top it off, the guy made his own decals. We decided to chill at his place and his car broke down on the way. I helped out. And later months I visited to help him out on car stuff. Like removing his RX7's engine with tow hitch mounted crane I bought.

    Later, I installed my fender flares, and later my roof rack I found on Rakuten. Then by stroke of luck found a Japanese company called Kei Zone that sold adjustable coil over kits for Kei trucks. The RX7 friend helped me install the rear half of it that included new leafs and adjustable coil overs in the rear as thanks for the engine help from before.

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    So All was fine and I also volunteered to watch cones for a Auto X event at Evergreen Speedway. Then my transmission locked up and I lost my 2nd gear on the way to that. I got there safely and after tinkering with it during the event on my times off, I decided to try it out on the track. It was ok... but I had to slam gears.

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    I decided then instead of replacing the transmission, to let it run its course and use that as an excuse to a engine swap I have been debating on the past years. I continued driving to car shows and stuff. The transmission refused to allow me to get into any gears by mid 2016. That was when I decided to swap a 13B rotary into it. Mostly influenced by my friendship to the RX7 owner. In return, he later bought a Sambar van hehe.

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    I was scheduled to go on a carrier deployment around January of 2017, so it was a perfect time to find a shop whiling to try the swap. Found one called J-Rod's Garage and he was all for it. He got the motor out that Nov/Dec and before I left, he located a RX7 to use as the donor car for the engine and harness. And later to use for the whole subframe, brakes, and Rotiform wheels.

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    Last edited: Mar 18, 2018
    zxrx likes this.
  2. Tuskano

    Tuskano Member

    Most of my time out on deployment, the shop spent the time planning and experimenting... taking measurements. Halfway or 3/4 of my time into deployment and the 13B was in the truck. The rear of the cab having to be cut 4 or so inches so the oil pan of the engine would have reasonable clearance. In return, the seats were removed and a frame idea made so the seating would be raised up higher to account for the engine. Engine mounts were made to hold the long Mazda transmission too.

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    Later on, when I returned from deployment, the Hijet's engine first cranked over and had spark. Later, they got the engine to first up... although having to jerry rig for gas, and the battery. And, not having a full exhaust yet... so it was insanely loud.

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    Other issues that were overcome was the stoke brakes were not going to work with the extra power. So the RX7's were used... and along with that everything else connected. The rear axle was removed and independent suspension was introduced, along with insanely big Rotiform wheels.

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    Next, I went and bought dual Magnaflow exhausts. I bought one at night from Autozone, and picked up a second the following morning. After taking them over by help from a friend and his truck, we grabbed a lot of the old stock stuff to take home. We also got to hear how loud it was... imagine a 2-4 Kei trucks revving high idle with no exhausts installed. Our teeth vibrated. But after we left, the shop installed the exhausts and sent pictures back. She was still loud, but reasonably loud. Nothing a resonator can't fix we guessed.

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    J-Rod's also made a cool wire shifter conversion box. And it has a dummy driveshaft on.
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    New balanced driveshaft next to a BMW E30 length one.
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    With the drive shaft and shifter all done up, the Hijet now was able to move forward and back. The catch being the wheels so big and them so far out the sides. So now the focus has been the body kit and wrapping up loose ends like cooling and most importantly, the interior.

    Latest pictures to drool over.
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    Steel fender flares make all smile.
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    Here, I'll have all videos or pictures so I can have them all in one place instead of posting in the "What did you do Today?" thread. Hope you guys enjoyed.
     
  3. mr.mindless

    mr.mindless Member

    Wow, that's really something! I bet it's good for a bit better than 73mph now.
     
    Tuskano likes this.
  4. Tuskano

    Tuskano Member

    Oh yes, and maybe even have a gear to spare to go faster!
     
  5. Tuskano

    Tuskano Member

    Went to visit my Hijet yesterday. Rode my scooter 30 miles to get to the shop and battled the beautiful weather as I rode there. Went there and back and maybe paid 5 bucks... one of the really nice things about just owning scooters as something to use as a backup.

    The front fenders are fairly complete, aside from touchup on welds. Once the back is done, and the end exhaust, among a number of other things, the Rotajet will visit a bodyshop to get paint touchups and fix some panel flexing that the flares had caused. The metal on these guys are super thin... I remember the shop having to be super careful on welding to not cut into and through the Japanese metal frame.

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  6. ttc

    ttc Active Member

    serious metal work.
     
    Tuskano likes this.
  7. Tuskano

    Tuskano Member

    The owner of the shop calls the truck art now... which it pretty much I'd. Some of the guys who hated working on the truck now love it!
     
  8. Tuskano

    Tuskano Member

    Rear fender shape is coming along very nicely... too lovely even when unpainted.

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    Isetta likes this.
  9. Isetta

    Isetta New Member

    Awesome build, great story, thanks for posting! Side pic of the scooter please.....
     
  10. JERRY GOULD

    JERRY GOULD New Member

    i had 3rx7s ;and one dihatsu
     
  11. Tuskano

    Tuskano Member

    I've never had an RX7, was more of a 3000GT guy. Although they were terrible to work on. This is my one and only Daihatsu... and maybe the most reliable car/truck I have owned. Plus owned it longer than anything else I had haha.

    Thank you! This is a good place to put everything so I don't miss any details. Would be good content if I were to do one of those books you have on a podium next to the car during car shows so people could see all the progress pictures and history.

    Which one of the scooter? The lowered black one? That is a Honda Ruckus clone that is called a Maddog. Had a 170cc GY6 on it until I got a hole in the engine case from being too low. Now it has a backup 150cc GY6 engine in it as the 170cc gets repaired.

    The 150cc engine
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    The 170cc with ammo box.
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    Future exhaust for the 170cc in the works...
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    Isetta likes this.
  12. Isetta

    Isetta New Member

    Thanks for the pics, that is a sweet ride!!! thanks for sharing all the detail.
     
    Tuskano likes this.
  13. Isetta

    Isetta New Member

    Baaaddass!! Those are sweet
     
    Tuskano likes this.
  14. Tuskano

    Tuskano Member

    Her as of last weekend. Cooling system is about done... radiator from a RX8 is mocked up. I had came over to drop off the new gas tank, pump, and other things. She turns over... but when the shop tried to do that, we found the temparary tank on the roofrack was outta gas haha.

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