Quote:
Originally Posted by Maripas
the inner Diameter of the original (as delivered, 12 teeth) sprocket is 17.0 mm.
The thickness is "not important" as far as the Profile (lateral cut) is dissymetric. you have to Mount the sprocket that the Offset with the smaller Diameter is looking to the Motor.
the effect of changing the front sprocket from 12 teeth to 13 theeth is, that the behaviour concerning Maximum motor turns, end Speed and torque changes a lot.
12 teeth: max. Motor turns up to 7000 rpm, end Speed 105 km/h, torque very good
13 teeth: max. Motor turns between 6000 rpm and 6500rpm, end Speed between 100 km/h and 105 km/h, torque moderate
I fear that with changing to 14 teeth you will arrive a Point where the effects will be negative. the Motor has not enough power.
front sprocket rear sprocket ratio
12 35 0,34
12 34 0,35 original
12 33 0,36
13 35 0,37
13 34 0,38 new
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okay...but I´m sure...the sprocket out of stock has
13 teeth.
You may check it at your bike,pls?!
so.. in effect :
stock: front 13 rear 34----ratio 0,38
changed front 14 rear 34----ratio 0,41
difference at 100 km/h= 7,14% 0r 490 rpm