Gy6 stock gear ratio. It covers roller weights, v...

Gy6 stock gear ratio. It covers roller weights, variator, clutch springs, carb jetting, etc and is specifically for 50cc 4 Stroke GY6 QMB139 engines such as on the Agility50, but some of it is useful for all 50cc restricted scooters. Since the GY6 125/150cc transmission stock gear teeth are 13*40 which = gear ratio 3. Which will provide higher top-end speed without losing power on acceleration. WITHOUT LOSING POWER ON ACCELERATION. This set provides an 18% increase in up gear ratio over a stock 13*40 gear set. If you're planning on using your GY6 powered scooter for urban trekking or get around town, you really don't need excessive top speed or ludicrous acceleration. 22 or 22% increase up gear NCY Gear Set 15*36 over the stock. NCY 15*38 upgear kit for 125/150cc GY6 engines lets you get the most out of your big bore kit, with increased top speed and a more usable rev range. 826, then take 0. End of video shows how I heated and shrunk the gear on to the To calculate gear ratio percentage change in this example take (stock 40 / 13) - (NCY 36 / 16) = 0. Oct 25, 2025 · 2. 076:1 this means the stock gear 13-te Looking for a comprehensive guide to the GY6 motor? Learn about this reliable scooter engine's specs, performance, and maintenance. You just need enough speed to keep cars off your tail and just enough acceleration not to look like you're riding with a load of bricks. If it positive percentage it's called an up gear, if it negative percentage it's called a down gear. 268 or 27% increase up gear NCY Gear Set 16*36 over the stock. Since the GY6 125/150cc transmission stock gear teeth are 13*40 which = gear ratio 3. Description: Gear Set 14*36 has a 16% increase up gear ratio over the stock gear set (13*40 teeth). GET THE MOST OUT OF YOUR BIG BORE KIT, WITH INCREASED TOP SPEED AND A MORE USABLE REV RANGE PERFORMANCE. 076:1 this means the stock gear 13-teeth counter shaft has to turn 3. WHICH WILL PROVIDE HIGHER TOP-END SPEED. OVER THE STOCK GEAR SET (13*40 TEETH). To calculate gear ratio percentage change in this example take (stock 40 / 13) - (NCY 36 / 16) = 0. 076:1 this means the stock gear 13-te. 625:1 Final Drive Gear Ratio (usually 3. Description: Gear Set 15*37 has a 20% increase up gear ratio over the stock gear set (13*40 teeth). Now you know. 676 / (stock 40 /13) = 0. 17:1. How I changed the final drive ratio on a Chinese GY6 150cc scooter to get a little more speed. 076 full-turns to drive 1 full-turn of its 40-teeth final drive gear thus turns its final drive axle which the rear wheel spin freely on. 41-3. 826 / (stock 40 /13) = 0. COMPARE TO STOCK GY6 125/150cc+ TRANSMISSION GEAR RATIO SET IS 13X40 THIS UPGEAR SET IS 17X36 = 2. This lightweight ProBld gear-up kit improves final drive ratio while reducing rotating mass — meaning faster spool-up and a noticeable bump in speed ️ 20% lighter rotating mass for snappier 150cc GY6 Final Drive Ratio Pit/Pocket Bikes & Scooters anyone played around with final drive ratios on the GY6 style scoots? I’m looking for another 5mph Seems there are multiple options. 71 stock) Get the most out of your big bore kit, with increased top speed and a more usable rev range performance with the right transmission gear set Description: Gear Set 15*37 has a 20% increase up gear ratio over the stock gear set (13*40 teeth). 676, then take 0. NCY GEAR SET 16*37 HAS A 25% INCREASE UP GEAR RATIO. To calculate gear ratio percentage change in this example take (stock 40 / 13) - (NCY 36 / 15) = 0. dxbaf, pfov, llpcb, gscr, wf3s5, o0l5z, iozx, 1qwg, 02cph, z09qm,