Thanks for your advise. I will block the grille with duct tape in my next tank. See how much improvement it can achieve.
whokilledthe jams: pump up your tires. 29psi is too low. It hurts more than 10%. Try 40psi if you don't want to go to max. 44psi. By the way, can you show me the picture of how you block the grille? Duct tape is only for temporary use.
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