I'm new to this forum but I know the answer to this old thread. I had a Nitro Burner, it's a Nikko Iron Eagle/Nikko-Radio Shack Dominator/Nikko Super Dictator - the spoiler/wing is the giveaway, all the parts are interchangeable. I believe you can replace all 16 bushings with Tamiya 1150 Sealed Bearings, 5mm (ID) x 11mm (OD) x 4mm (Thickness). If I were you, I’d get 3D printed SLS Nylon gears because that’s what failed on mine (Motor Pinion 0.6M, Pinion 10T or 12T, Motor Shaft Bore 2.3mm, Internal Gear Style is just Nikko Dictator / Super Dictator compatible, I don't have much info on that), you can probably just by a whole upgrade Nikko Dictator module/setup. You can then update the battery to a 5000mAh 7.2V NiMH pack with a XT60 to Tamiya adapter and get more power and 30+ minutes run time without upgrading gears, maybe... If you really want to modernize it, get a hard case Lipo 2S (Powerhobby 2S 4000mAh 50c Rounded LiPo) with a Deans to Tamiya adaptor, could possibly go 3S with full upgrades+ (4S is overkill without serious modifications to cool the motors, protect plastic, and the entire drivetrain), update the servo (Savox SW-0231MG) + servo saver (25T), ESC for dual motors (Hobbywing QuicRun WP-860 or 880, make sure to set a drag brake to protect gears - take advantage of the ESC upgrade...), modernize the radio/receiver (FlySky FS-GT3B, set the End Point Adjustment - take advantage of the upgrades here too so the new servo doesn't snap your linkage...), if you want, upgrade the motors to some 390 motors (Team Associated Reedy Sport 390 Brushed 30T Motor have lots of torque $$, RCAWD 28T 390 Brushed Motor are fast $$$, but even some highly rated Universal 390 motors $ for around $10-$15 that are the right size will be an upgrade and run cooler), especially if you go the Lipo route. I’ve said this in a few different places for the variations of this RC, it works awesome for any Nikko Dictator variation and turns a 90s toy grade RC into a modern hobby grade RC with a retro vibe, so you can still have fun while being nostalgic, just don't treat it like a basher...