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Kyosho Mini-Z Series

Old 03-11-2023, 12:30 AM
  #7561  
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Originally Posted by Slipstream_94 View Post
Hello everyone, I'm piecing together a stock MR-03 that I got used, and I need some help. What size screws are used for the servo motor hold down? I bought the stock hardware pack (KYOMZ409) and I'm not sure which screws are used for that part. I think they're smaller than the chassis screws? Thanks all.
Are you referring to the screws the arrows are pointing to in this image?

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Old 03-11-2023, 02:50 AM
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Yes, those are the ones. For some reason my car was missing the servo motor hold down; I would like to verify where I can find those screws before I buy more parts for the chassis. Thanks
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Old 03-13-2023, 11:40 PM
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Slipstream 94, I measured one of my MR03's front cover screws, which per the diagram is a MZ409 and the same screw, and it's a 2mm x 6mm coarse thread panhead screw, but it could be a countersunk head as both are listed as the same MZ409. I usually get my mini z screws from Kenon, but shipping can be high for small orders. Hope this helps.

I stripped out one of the screws holes that holds the front body mount/spring plate, and I was wondering if any of yall have had this problem and what you did to remedy this? I know I can epoxy the screw in, but then I'll have to remove the top arms to change springs. So a larger diameter screw, 2mm heilcoil?
Thanks, Drew

Last edited by BoxxerBoyDrew; 03-14-2023 at 01:37 PM. Reason: added info
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Old 03-14-2023, 08:50 PM
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Nice looking, except they didnít factor in the MiniZ wheels are approximately 1:27 scale of an 18Ē wheel, not 21Ē
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Old 03-15-2023, 06:27 AM
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Originally Posted by BoxxerBoyDrew View Post
Slipstream 94, I measured one of my MR03's front cover screws, which per the diagram is a MZ409 and the same screw, and it's a 2mm x 6mm coarse thread panhead screw, but it could be a countersunk head as both are listed as the same MZ409. I usually get my mini z screws from Kenon, but shipping can be high for small orders. Hope this helps.

I stripped out one of the screws holes that holds the front body mount/spring plate, and I was wondering if any of yall have had this problem and what you did to remedy this? I know I can epoxy the screw in, but then I'll have to remove the top arms to change springs. So a larger diameter screw, 2mm heilcoil?
Thanks, Drew
Thank you for the info, since it's coarse thread I assume that should be the same thread as the chassis screws. I actually recently tested using longer screws (2mm machine thread) and plain nuts (for clearance) on my project car for those bottom screws. If you use the narrow front this might be viable. Unfortunately the nuts sit on the outer front spring pocket for the wide front. Hope this helps.

Last edited by Slipstream_94; 03-15-2023 at 06:50 AM. Reason: Fixed an error
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Old 03-15-2023, 06:46 AM
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Has anyone tried the Honda HSV body on an RCP track? It looks neat but I'm curious how it performs.

Last edited by Slipstream_94; 03-15-2023 at 06:51 AM. Reason: Double posted
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Old 03-15-2023, 06:47 AM
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Raman, what brand are those bodies? They look great.
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Old 03-15-2023, 08:45 AM
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Originally Posted by Slipstream_94 View Post
Raman, what brand are those bodies? They look great.
GL Racing
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Old 03-16-2023, 01:39 PM
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Thanks Slipstream 94! I just saw last week in a pic online the exact mod you are describing, I can't remember where, and it and the helicoil is my best option until I build out a PN 2.5!
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Old 03-17-2023, 05:12 AM
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Originally Posted by Slipstream_94 View Post
Yes, those are the ones. For some reason my car was missing the servo motor hold down; I would like to verify where I can find those screws before I buy more parts for the chassis. Thanks
There are actually two different servo motor plates (see below) that use different screws depending on which MR-03 chassis you have. The main chassis design was changed a few years after introduction to fit the longer brushless boards while still fitting the brushed boards. The original chassis used the larger servo plate (on right in pics) and the screws went through the top cover and the servo plate into the chassis using countersunk screws. If itís the one with the teeny tiny screws, like the redesigned chassis (on left in pics) those screws come in MZ411 with the smaller servo motor plate and the upper covers as the exploded view above says. I know Kyosho sells them separately, but couldnít find the part number. Hope this helps!




Newer chassis on left, original chassis on right.


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Last edited by Traveler2; 03-17-2023 at 10:31 AM.
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Old 03-17-2023, 01:39 PM
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Great, thank you for the explanation . Now I know where to find the hardware; I checked my MR-03 just now and mine has the revised hold down. I somehow missed that detail even with the exploded view in front of me. Thanks also for the photos.
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Old 03-17-2023, 02:00 PM
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Originally Posted by Slipstream_94 View Post
Great, thank you for the explanation . Now I know where to find the hardware; I checked my MR-03 just now and mine has the revised hold down. I somehow missed that detail even with the exploded view in front of me. Thanks also for the photos.
You're welcome. Decided to post pics because that exploded view is misleading. It shows the screws going through the top cover into the newer servo plate, which is NOT correct. Wonder if Kyosho has revised that graphic. EDIT: They have not corrected it in the latest manual. Here is what MZ411 comes with


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Old 03-17-2023, 02:33 PM
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Hmm. It's definitely interesting how they never updated the exploded views to reflect that running change. Interestingly, the PDF for the MR-03 Evo exploded view has a completely different diagram that correctly shows those tiny screws. I found it on the "Mini-Z Info" page. Thanks again for the photos and info.
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Old 03-18-2023, 03:33 PM
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Default Compatible Tx

Hi folks, Iím wondering if anyone can tell me what the cheapest compatible transmitter is for my MR03?

I donít need fancy touch screens ect just something that will allow for adjustments but most importantly exponential? My RTR steering is just too twitchy around the centre of itís movement.

cheers!
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Old 03-19-2023, 01:30 AM
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Originally Posted by PDR_ACT View Post
Hi folks, Iím wondering if anyone can tell me what the cheapest compatible transmitter is for my MR03?

I donít need fancy touch screens ect just something that will allow for adjustments but most importantly exponential? My RTR steering is just too twitchy around the centre of itís movement.

cheers!
Hello, I hope you're doing well. Do you have more info on the car? If I recall correctly, the 2.4Ghz MR-03 Mini-Zs have used several different radio protocols over the years, although technically they're all 2.4Ghz. There should be a silver sticker on the top of the chassis, reading something like "FHS 2.4 Ghz Sports 2." The letter codes like AFS, FHS, FHSS etc. are the radio protocols and will help tell what will bind to your chassis.
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