Kyosho Ultima ST GP RS-148 gearbox input gear

thingiverse

Okay, so this is a Kyosho Ultima ST GP (Racing Sports version) gearbox input gear. Part nr. RS-148 (part 1/2, the second part is on the separate release, you can find it from my things). I´ve printed tens of versions of this gear to tweak this design. This is the latest and final version. This has 0,4mm wider teeths than original. There simply isnt any space left to widen the teeths more with stock input gear, due its design. You might need to shorten the locking pin (that goes to the hole in the input axle) a little. This is due the reinforcement procedures that i did to this gear. I suspect this widening process might give a great boost to the durability (with printing with our FDM style printers). The gearbox gears are all mod 0.8, so this gear is easy to print even with stock 0.4mm nozzle. I "drove in" my gearbox, with spinning the input shaft with cordless drill for a few minutes, then opening up the gearbox, cleaning it and applied new grease to it. Top tip for input gear: If you want the best gearbox input gear you can buy to replace your plastic one, ARRMA part nr. AR310762 is direct swap. Its steel gear with full width teeths, goes straight to the 5mm axle Kyosho uses. You only need to slightly shim its level to the input axles gear locking pin level. You can check my rc10talk build thread to see what i mean with this shimming. As always, use good quality grease in gearbox and make sure your slipper is adjusted properly. Enjoy and drop a comment how did it work for you, or if you want any changes to be made! Also check my other parts that i have made to Ultima ST Racing Sports/Type-R/Evolution chassis. Here are the links to my project: https://www.rcuniverse.com/forum/rc-nitro-stadium-trucks-243/11675757-my-ultima-st-gp-type-r-evo-20th-anniversary-project-3d-printed-cf-parts.html https://www.rc10talk.com/viewtopic.php?f=30&t=44634