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As others have said, you just need to get some miles on it. I have ABS and a 21" front with no issues. I thought I had made a big mistake at first but I took it easy for a hundred miles or so to get use to it. I've since been on a 3,000 mile trip on it and have no regrets.
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'09 FLHX - Vivid Black
ABS, Cruise, Security
21" Hogpro Primitive, RSD A/C, PC-V w A/T, Rinehart Slip Ons, H.I.D
72.5HP/83.3TRQ on Fuel Mileage Map '09 Iron 883 - Black
Too many mods to list.
__________________ 09 street glide, pewter denim, R/C Components 21/17, rush pipes 2" baffles, 103 stage II, screaming eagle heavy breather, abs, security, and little stuff that adds up like crazy.
The brakes are effective in braking relative to torque. If the rotor stays the same diameter and the radius/outside diameter of the tire touching the ground increases over the standard tire, the torque beam length increases. The mass of the traveling bike acts upon this beam length which drives the torque value.
So, if the standard brakes/rotor/tire set-up are good for a given torque controlling value, they will be weaker with a larger diameter tire.
Rotating mass does play into the equation as well as the interface of the brake pad and rotor surfaces. But I don't consider this to be the larger factor (after break-in of the pads/rotors).
So - short term you have a pad/rotor break-in issue, and long term you'll have decreased braking overall. You could upgrade the caliper (more pistons) or up the rotor diameter. Look at Buell's rotor, near at the rim. This provides increased torque controlling ability.
Conversely, if you drive the wheel too small, you increase torque control to the point the tires can't maintain traction and they skid.
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2008 Street Glide
96TC, PC-V with Auto Tune, AN/BS & Custom Slip-ons, Hog Tunes
should always do some brake-in with any new brakes. on a car, i do some highspeed stops on the expressway. As for the larger diamter vs slowing down....yes, it will be harder. Even if the wheel weighs the same and the rotors are in the same spot, the weight is now further from the center of the wheel....moving weight further from the center creates more momentum/contrifugal force, thus making it harder to slow it down in the same amount of time as a smaller wheel.
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'10 Harley Road King Classic
'99 Corvette FRC Nassau Blue- For sale/trade
'07 Honda Shadow Sabre
'09 Tacoma DC TRD sport
09 street glide, pewter denim, R/C Components 21/17, rush pipes 2" baffles, 103 stage II, screaming eagle heavy breather, abs, security, and little stuff that adds up like crazy.
2009 pewter denim street glide
