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Bike Stops Accelerating Above 2/3rds Throttle

superimpossible

New here
Joined
Aug 23, 2024
Messages
1
Location
California
Hi All,

New to the hobby and first post!

I've just upgraded my son's Mototec 1600W Pro Dirt Bike with a Fardrive ND72300. I'm still running the stock battery and motor and I've bypassed the BMS on discharge. After reading all the tuning threads I could find I've got the bike is running pretty great, but I've got one issue I'm struggling to crack...

At somewhere around the 2/3 throttle point I can feel the bike stop pulling - it just pretty much maintains the speed, or even slows down a bit and maintains. If I reduce the throttle back to around the 2/3 point I can feel it pulling again a little further, but if I again twist to full throttle I again feel the bike slow down a bit and then maintain. Any suggestions on where to start debugging?

Thanks!
 

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