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First off from what i have found out 2013 & 2014 Breakouts shipped to Australia all have a 132 Tooth Belt Part No: HD40059-09A
My bike is a 2014 CVO Breakout & i have fitted a 30 Tooth Sprocket to the front & a 70 Tooth Sprocket to the rear.
Going off the Gearingcommander web site ( Picture Attached ) with the standard 132 Tooth Belt & standard pulleys the Belt / Sprocket length is 576.01mm
With a 133 Tooth Belt & the 30 / 70 Pulley Swap the Belt / Sprocket Length is 576.95mm
With a 134 Tooth Belt & the 30 / 70 Pulley Swap the Belt / Sprocket Length is 584.06mm
My wheel is hard foward with the 132 Tooth Belt & the 30 / 70 Pulley swap and with the 260mm Tyre its rubbing on the plastic inner liner.
a few rough measurements i have calculated for the different Tyres are as follows:
240/40 Has a side wall measurement of 96mm
264/40 Has a side wall measurement of 104mm
Thats a gain of at least 8mm in height & that's not allowing for the fact that the Tyre is squeezed onto the standard 8" Rim.
Gearingcommander web site lists the Tyre circumference as follows:
240/40-18 = 2039.5mm
260/40-18 = 2089.8mm
2039.5 / 3.14 = 649.52mm Diameter
2089.8 / 3.14 = 665.54mm Diameter
Difference here is 16.02mm same as my calculation above once this is divided by 2
Given that the standard 132 Tooth Belt & standard pulleys the Belt / Sprocket length is 576.01mm between the center of the front sprocket to the center of the rear sprocket.
To keep the Tyre the same distance from the plastic guard liner I would need to add 8.0mm to the measurement & end up with somewhere around 584mm center to center.
am i better off with a 133 tooth belt or go to a 134 tooth belt.
Be interested to hear from others what belt they have run with a 30 / 70 pulley swap & also what size rear Tyre & if their bike is standard suspension or if it's been lowered.
I just thought of something while playing around in my PV software. Do we needed to change the gear ratio info? In the canned tune I started from mine read:
If you run those numbers through a wear calculator, they're bad. The stock numbers are shockingly bad.
https://www.blocklayer.com/chain-sprocket
It does help explain some of the odd wear characteristics and failures I've seen pictures of. I'm right surprised Harley made such a basic mistake with their belt drive.
If you run those numbers through a wear calculator, they're bad. The stock numbers are shockingly bad.
https://www.blocklayer.com/chain-sprocket
It does help explain some of the odd wear characteristics and failures I've seen pictures of. I'm right surprised Harley made such a basic mistake with their belt drive.
YES! And the PERFORMANCE of the gearing on my first Breakout, a 2014 model, was just awful. Made the 103 engine feel absolutely gutless. I paid my hD dealer to change the gearing via pulley changes.
The gearing on the 2023 Breakout 117, coupled with the hugely superior engine torque curve, solved the gearingproblems that the early Breakout had.
