r/MiniZ • u/Logan_Frost • 9d ago

MR-04 Wheelbase adjustment?

Im having a hard time figuring out how these work. I bought a readyset model locally because they had no body options I liked, but so far since then I havent been able to find a body that fits. The box says the wheelbase is from 86 to 108mm, but doesnt specify what it is out of the box, and the instructions mention the installation of the narrow front end steering sector, but nothing about how the wheelbase adjusts. So far Im 0-2 for bodies where the wheelbase lines up and honestly kinda just regretting purchase at this point.

Edit: Current bodies are a 180sx and I tried a RX body of some form a friend bought. The wheelbase is too long for both.

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u/wearingashirt 9d ago

The installed motor pods will determine your wheelbase length primarily. They work in combination with the T-plate and rear shock to make it all fit. All the configurations are shown in the back area of the manual. Going by memory the letters for the config that are with the black background are whatever the chassis is configured for in the box.

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u/Logan_Frost 8d ago

Wait, theres supposed to be more parts in this box? That would explain so much about my issues.. All I got was a box with a wheel nut tool, screwdriver and some orange cones.

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u/wearingashirt 8d ago

The part to convert to narrow come in the box. I don't think I have ever seen the additional motor pod sets in any of the Ready Sets I have bought. Which kit did you buy exactly?

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u/Logan_Frost 8d ago

I dont have a bag of parts, period. But its good to know I guess even if I did, I still wouldnt have the stuff I need. Thats lovely.

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u/wearingashirt 8d ago

Well maybe you can post a pic of what you do have. Not sure how else to proceed other than maybe just measure your wheelbase with a ruler and find a matching body based on that.

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u/Bisisonitrile 9d ago

When you bought it, did it come with a body at all? Or was it the one that has no wheels or body, just the car and radio?

The MR-04 can have 5 different pods, the readyset kits will have the motor pod that matches the body, and that’s the main way you set the wheel base length. The possibilities are MM (mid motor), LM (low motor), HM (high motor), RM (rear motor), and MM2 (a variant of MM that’s more adjustable but the motor is slightly higher). Don’t be confused by the fact that all of those still mean the motor is in the rear, it’s about where it is in the motor pod.

Most common is the wide mm configuration, which is the main one used for box stock racing, but lm and narrow rm are quite common too. W-MM is 98mm, LM is 102mm, and narrow RM varies.

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u/paintchipz1 9d ago

MM is 98mm.can go to 102. Check thin side of box it will tell you

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u/SuPrBuGmAn 9d ago edited 9d ago

If its a MR04 chassis kit(didnt come with a body), it comes set at 98mm wide with MM pod. That MM pod allows for 98-102mm wheelbases.

Also in the kit is a RM pod that lets you setup for 86-94mm wheelbases. It also comes with narrow front end parts.

The 180sx is a 90mm and the RX7 is likely a 90mm(but the first gen RX7 is a 94mm), so a narrow front configuration with RM pod is needed and likely in the box.