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  1. Grom Talk
    I have a 2019 Grom, it runs great. I had to replace the clutch from wheelies and went with a Koso clutch, springs, and lifter plate from RevZilla. After cold starts (even after it get up to temp) it will lunge into first and some times stall). After its been put into first there will be no...
  2. Grom Performance
    Hello, Im new here and I apologize if this has been asked and answered already but I recently installed a Koso cam on my grom and 4th gear kinda sputters and doesn’t pull. Also all gears are slower in lower rpms until I hit over 6-7k. I know my timing isn’t off I checked and rechecked over and...
  3. Grom Parts for Sale / Wanted
    Bundled together. Taken off running bike with zero issues. Great for basic bolt on mods to keep your bike running safe. Self adjusting ECU. $185.00 + Free Shipping - PayPal F&F / Venmo $185.00 + $8.00 Shipping Priority Mail - PayPal G&S Located in New Hampshire. Local pickup preferred but...
  4. Grom Parts for Sale / Wanted
    For Sale Head ported by DCR 34mm Port matched intake port to run a Koso 34mm Throttle body DCR Dual valve springs installed OEM sized valves Valve seals are new
  5. Grom Performance
    hello I am looking for some help on tuning my ejk that is running very lean Mods koso 170 piston and cylinder * stock head koso cam chimera intake 150 pcx injector Koso AFR hooked on stock sensor 93 premium gas numbers GRN 4.5 , YEL 7 , RED 8 , G/B 7 , Y/B 3.5 , R/B 5...
  6. Grom Talk
    I'm thinking of swapping the throttle body and have a few questions: 1) Do I need to de-pressurise the fuel system to swap over the injector or just leave injector attached and then fit it after to the TB once attached? 2) Do I just pull the tps off and put it on the new one (The koso 34mm...
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