Had the same brand new bullet when brakes applied throttle closed cut engine .I adjusted linkage it was fine tho wouldn't run on ground just stalled .when on stand wheels spun .turns out after I said it had clutch problem and sent it back it had a broken spring .now it's tuned runs really well but now n then just cuts out .oh yeah the fuel from exhuast takes the colour off the wheels and also the chrome .like the look of it but I should have brought a kyosho most aggro I've had with a nitro car 🚗 🙃