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  1. #1

    Default -Horsepower Skepticism-

    Hi folks..

    Re my recently acquired 2006 Gen II FZ1.

    Some simple work I did immediately. Opened the air box up as per posts on this website. New K&N filter. Disconnected EXUP cables and left the valve open, on stock exhaust.

    My dyno tuner got rid of the fuel injection throttle transition glitch, eliminated the power restriction programming for first and second gear. He did some basic tuning, knowing that I'll be changing other things soon. Like going to full exhaust and eliminating whatever pollution nonsense there is.

    He measured 121 horsepower on a cool and rainy day at sea level. Disappointing, but within normal range, according to other posts. (Agree? With dyno and airbox flow work?)

    I was encouraged to re-install a Yoshimura slip-on I had, and told the ECU map installed would accommodate it. Feels like I gained maybe 3 or 4 hp with the slip on. So, maybe 123-124 hp now.

    HUGE frustration though. I've never been on a litre bike so reluctant to wheelie.

    I'm told the FZ1 has a front end weight bias, but for crying out loud, even at peak revs in first gear all I get is a hover up front.

    I can spend the money on a full Yosh system or something like it. Do all the other stuff. But no way I'm going to see the 145 plus horsepower figures I see quoted here.

    I'd need that much more horsepower to start having proper fun. That's just me..

    Sorry for the length of this. Any thoughts truly welcome..


  2. #2


    I understand that the first three gears are retarded by the ECU up to a certain (?) rev speed. But you're right it doesn't lift up like it should. I'm wondering if it was a ploy by Yamaha to keep inexperienced riders out of the emergency room.

  3. #3


    your hp numbers are realistic, a tad on the low side perhaps but normal. people with the high numbers are generally on dynos that register high. if your afr is sitting around 13.4:1 on a flat line through your power curve, it's good to go. as far as the wheelie part goes, yeah, it's a heavy bike low on power, and also, it has a soft rear shock. stiffen up the rear, it'll lift more. remember, it's not a sport bike, it's a sport tourer. If you want more punch, change your gearing, 520 conversion and drop a tooth in the front, add three in the rear, and that'll make a big difference. you'll lose some top end but there aint anywhere you can legally hit those speeds anyway except maybe the front straight of portland international.

  4. #4


    Hey thanks for that. I dropped to 15 teeth on the front sprocket and liked the difference. It was encouraging enough to make me consider spending money on full exhaust and pollution control removal. There may be a way to be happy here after all..



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