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Apr 07, 2019, 12:55 PM
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The saturn forks are oil filled. But they are leaking. They fit on the HKM.
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Apr 08, 2019, 10:34 AM
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I just needed to bleed it more that's all
Last edited by poochy; Apr 08, 2019 at 09:37 PM.
Apr 08, 2019, 03:06 PM
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I filled the rear shock with CST / CPS 600 // WT 48 oil. No rebound. Works fine for me
Apr 11, 2019, 09:58 PM
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Originally Posted by Stitch.
I filled the rear shock with CST / CPS 600 // WT 48 oil. No rebound. Works fine for me
Im at 70/900..the bike soaks up the bumps well on our parking lot track, and also seem to have more wheelie control for powering hard out of the corners. Gonna try 1250 cst nxt for more reponse and steering.
Last edited by poochy; Apr 12, 2019 at 05:57 AM.
Apr 17, 2019, 05:40 AM
DominicM's Avatar
Comical action from the awesome Cotswold MCC track in UK. Great skills riding so close to one another with the occasional bit of fairing bashing and collision. Very entertaining.

RACING (& SOME CRASHES\COLLISIONS) HobbyKing HKM-390 RC BIKES RTR: Cotswold MCC (6 min 11 sec)
Apr 17, 2019, 06:32 AM
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Awesome video ! Great camera work ! Thanks
Apr 17, 2019, 09:35 AM
DominicM's Avatar
Thanks Geez. Looking forward to sharing some 1/5th scale electric and nitro action too.
Sep 05, 2019, 09:32 AM
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Since I leave 2 minutes from the beach, I am going to buy a Lost RC Surfer instead! Now, this thing is super cool especially when we get some nice waves.

RC SURFER 3 Readyset with KT-231P (3 min 46 sec)
Oct 17, 2019, 12:47 AM
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2000-redrider's Avatar
Just received mine today. I put the stickers on the body while I waited for the battery to charge. Like mentioned in a previous post, I had to trim a little bit of the riders leg in order to clear the crash bars, but other than that the body fit was spot on. I put some batteries in the radio and ran the bike literally straight from the box.

This thing is amazing. Bike felt very planted and responsive. I thought that with the gyro, it might be somewhat sluggish when transitioning from side to side, but that wasn't the case. The brushless motor was smooth and fast, and it seemed to stop well even without a front brake.

Front forks seem a little bouncy, so that will probably be the first thing I tweak. Also, my crash bar seemed to get hung up on my rough street alot. I'm anxious to see how it runs on a smooth surface.
Nov 21, 2019, 12:02 PM
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Originally Posted by geez
i'm wondering if they are using the same gyro in the V2 . I put a 5000 kv brushless in my V1 and the gyro flew apart inside the rear wheel when I tried it on the bench . that was on 2 cells so I would be careful using 3 cells . Got some GRP tires after that .
I've just got my HKM390 and was wondering where did you get the wheels and tyres from?
Nov 21, 2019, 04:43 PM
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katana2665's Avatar
If you can't find them on Hobbyking, then Holeshot Hobbies should have them.
Nov 24, 2019, 05:59 AM
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H king 1/8 hmm 390

Are ang of you guys running this bike in car parks and want to catch up for a bash . I've run 1/5 scale bikes at brendale a few years back. So wanting to get back in to it
Last edited by Melina Braddon; Nov 24, 2019 at 06:00 AM. Reason: I used to use name as Adrian 46
Dec 08, 2019, 11:29 PM
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H king 1/8 hmm 390

Hi guys,

I just purchased the Hobby King 1/8 hmm 390. Still waiting on delivery. Anyways, I was wondering where can I buy parts for this bike? I noticed Hobby King does not seem to sell any spare parts for the bike. All the parts for the bike seem to have been discontinued. I also noticed some of you here on the forum, seem to have ordered an upgraded shock damper for the bike, from But those parts seem to be made for a different bike, the X-rider. Will parts for that bike fit the 1/8 hmm 390? I want to order spare tires, shock damper, and a few other parts for it. But I want to make sure if I buy the parts, that they will fit this bike.

Any help, will be appreciated.


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