Kyosho Mini-Z AWD MA-020 Servo Disassembly & Upgrade
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- เผยแพร่เมื่อ 13 ก.ย. 2021
- Mini-Z MA-020: Accessing and upgrading the servo
Today we are going to see how to access the servo assembly in MA-020. It's buried quite deep. Then we will install this metal servo saver and see if it improves steering. Mini-Z steering is simple and robust but tends to feel a bit sloppy like this. The play means centering isn't 100%.
Begin the disassembly by removing the suspension pin holder clips and pins. Watch out for the tiny springs. Then remove the top cover. Remove the rear end, unscrew motor wires, and then pop the top cover. This last step took me a few tries. To remove the servo cover, unscrew the two battery terminals, followed by undoing one screw next to them. Check out what's in the MA-020 servo. Remove the holder piece over the central drive shaft. I ended up removing the main motor in order to push the servo assembly out from below. This was quite challenging.
Here we see the servo saver, gear stack, the potentiometer, and the servo motor. This is a 5-wire servo.
This is the GPM aluminum servo saver for MA-020. Quality feels pretty good. But it doesn't come with an M1.2 screw needed to attach the link.
Since the servo has been disassembled, replacing the saver is easy. However, when stuffing the servo back in, be careful with all the small wires. Attach the cover and wires, and verify the servo function. I might as well test motor functions too.
The improvement is small but it's there. The new servo saver has tighter tolerances all around. The car drives well and servo action is good as expected from a Mini-Z. That said, since I don't drive this car straight 99% of the time anyway, reducing steering play isn't the most important thing.
Thank you for watching!
Servo Saver: www.asiatees.com/display?id=2...
Music: "Embrace" by Sappheiros ( • ❰Chillout❱ Sappheiros ... ) - ยานยนต์และพาหนะ
Thanks for showing
Thank you so much! This helped me find out what was wrong with my servo. It was binding so I took it apart and cleaned the gears with a brush and now it works great👍 !!!!!!
That's awesome! Yeah it's good to know how to get into the servo to service it. 👍👍
Thank you very much for the video, well done! Might also would like to see how to take the whole servo block out tho... But do you happen to know if it is possible to push the old(black plastic) part pin trhough the aluminium latch into the plastic tube? The old part pin comes out but not going in to the aluminium part's plastic tube so well. Not brave enough to push too hard, since you said you used M1.2 screw😀
Thanks! Yeah I should've filmed some footage of how I removed the servo motor because that was some work. I never did detach that little linkage arm from the servo saver. I tried but couldn't get it out so I just used a m1.2 screw which worked nicely. It's odd that the gpm part didn't come with that screw or some other option.
@@sammybaka Yep, sad that they did not include anythong for that. I myself got the old part pin out.
But is this latch not supposed to "spin/move freely" like it does on the original part? For me it seems that if I use screw then it will not spin but I certainly am wrong I think 🤔😀
@@xxxistence Yes mine swings freely for me. Hope you are able to get a way to attach them.
Hi, do you have details on where to purchase the metal servo saver or the brand and model number you used? Thanks
The brand is GPM and I think this might be tough to find today. Originally I bought it at www.asiatees.com/display?id=25689
Would you mind sharing where I could buy those wheels and tires?
Hi -- these are the rims that came with the subaru wrc 2002 autoscale body (MZP448WR) or ma-020 kit. I don't believe they can be purchased separately unfortunately. The tires are DS Racing LF-5 (www.wolframrc.com/product/lf-series-28th-scale-24-5mm-od-drift-tires-ds-racing/103?cp=true&sa=false&sbp=false&q=true)
When I put it back together the steering isn’t centered, please help lol
Sometimes you need to reset the steering center on the board. Please follow this these instructions from the manual: If the steering cannot be centered within the trim adjustment range, reset the steering neutral position as follows. Make sure that the transmitter is powered off, and set the steering trim knob to the center. Then, power on the chassis, and set the front wheels to the center with your fingers. Keep the front wheels at the center and long push the pairing button until the LED starts to flash fast. Power on the transmitter, and make sure that the front wheels are at the center.
Mine steers alot more right than left. Is it normal that the „nub“ of the steering servo is a bit crooked?
Which part is the nub? Can you use steering trim on the transmitter to straighten the steering?
@@sammybaka the nub that goes in to the tie rod. It do drives straight, the steering angle is just lower in on side
@@Hammeltoni Please try these steps to calibrate the neutral steering position kyosho.com/mini-z-info/ufaqs/how-can-i-reset-the-neutral-position-of-mini-z-sportsrwdfwd-chassis/
@@sammybaka thx i try it later:)
That is due to the weight imbalance
I installed mine 2 min after driving it smoked up now my board is fried do you know what I did wrong
That's terrible. There may have been a short somewhere (e.g: loose wires) or perhaps some bindings causing the servo or main motor to draw too much power. Is there any visible sign of issue on the board?
Looks like one of the fets burned
I’m just goin to have to order a new board
still have a lot of slope in the after
Yup. There's always going to be some play with the mini-z servo gear train, plus between the servo pin and tie rod, and also where the tie rod connects with the knuckles. The steering rack doesn't use more precise ball joints. I'm thinking of getting an aluminum tie bar to help reduce play further.