Kyosho RRR BRCA legal. Top speed 130 mph

I just moded the RRR internal drive ratio to extend it for top speed. I changed the RRR rear diff to a custom solid axle with a 5mm pitch 14T pulley and added a 14T pulley on the layshaft. These were linked with a 10mm wide belt.



This mod changed the front to rear drive ratio so I had to change the side pulleys and belts. I ordered a 2.5mm pitch pully and belt system but it hadnt arrived when I checked what I had laying around. The 25T side pulley from the Evolva linked to the 15T side pulley from the Evolva gave me exactly the right overdrive ratio and the original side belt was a perfect fit!!



Pics below of the mod



The engine installed is the Novarossi 12-5 SCT but I am waiting for the OS 18 TZP Murnan Modeefied.

The rear pod pulls off and is replaced with a BRCA legal podfor normal racing. I just install the side pulleys back to kit and ready for normal racing