r/NitroRC

Does anyone here own the HoBao Hyper 7 TQ2 RTR Buggy with the MAC .28 Turbo engine? If so, what's your overall opinion of it? How reliable is it, and how easy is the engine to start, tune, and keep running well? I'm reasonably experienced with nitro rc's, so I'm mainly interested in long term reliability and how fussy the engine is to tune rather than beginner tips. Thanks in advance!

Needs new pull start. That’s it.

I think I got this one around 1999, I believe it’s from 1996 or so, and it is what it is! Incredibly fun, only front wheel drive, I guess it is Kyosho, have only just found it and the radio gear works great.

It needs to live again, if only I could get some parts for it that have perished! Don’t care if it’s aftermarket. (Sorry I don’t have much information about the particulars - make, model, just lucky to have found it intact)

Obviously I need to pull down the engine and clean it all, I might need a new fuel tank…

Suggestions for someone to hassle for parts, or just general advice… fuel, etc, also I remember that there was a 2speed gearbox/ clutch available for this back in the day, could it be possible?

Tasmania Australia for reference of availability to obtain economically viable parts. (Maybe cheaper to get a whole new one right?)!!!

Wasn't me driving i also winced when it hit the lip

For gas cars

Genuinely never snaped a wheel hubs pin ever , was a hard crash tho smashed a shock bottom, a hub and hub carrier also my stearing servo saver is too weak and I couldn't turn in time basically full throttle into a step

I've been chasing a problem with my RED 521 Sport. The high-speed needle seems to have almost no effect: even when I richen it a lot, the engine still revs extremely high and sounds lean. The HSN is almost sticking out of the carb, which doesn't seem normal.

• Carburetor was already replaced completely by the dealer.
• Engine had 1L break-in on the bench by the dealer + 3L very rich on track.
• Engine now has about 5L total.
• The problem becomes much worse after 40–50 minutes, once fully hot.
• Fuel lines, fuel tank and air filter have all been checked/replaced.

I'm attaching photos of:

1. The front bearing area (it looks quite oily/dirty).
2. The piston after completely disassembling the engine.

Does the piston wear look normal? Does the front bearing show any obvious signs of failure? I noticed a slight amount of play in the front bearing after disassembly. Could a leaking/worn front bearing cause the HSN to become almost ineffective and make the engine keep revving as if it's lean?

I recently acquired an old collection of nitro cars; my two uncles did some serious things with them between 2000 and 2010. Now I have them, but my question is...

I can't find spare parts online for the body, or rather, I have no idea what this "form factor" is called; there are no brand names, only the engine is a Force .18, a Conrad 15SZ and 17SZ and a VX .18, which is what I've found out.

All the engines still work, etc., I'm really happy about that. I would appreciate more professional help, although I did own a Nitro once, but that was 6 years ago, so I don't really know much about them.

rovan 36cc gas engine

Hello guys,

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i found this RC car in a box. We once got it from our neighbor like 20 years ago.

We were able to let it run again but it looks like a seal is done. It runs but looses some gas.

Can sombody help me identify what model this is? Or knows where i can find parts for those cars? I wanna repair it.

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Thanks in Regards!

hey, this is a nitro slash, bought it about 2 months ago. The sound that it’s making ( whatever it is) seems to come and go. whenever the sound stops then it seems to run right and idle but whenever it starts that rattling sound, it dies soon as I let off the throttle. Also (this may be related) when the differential engages it seems to start that sound and jerk. with one wheel free spinning at low rpm that sound seems to go away. Had throttle pressed to keep it running. checked clutch n spring as well