yes their is a protruding sleeve (look in first pic of this section) the reason that the case needs to be machined is because the diameter is diffrent... you go from a 58mm diameter (150cc) to a 61mm (170cc) or a 62mm(180cc) cylinder... depending on which size big bore kit you buy....
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Talon DLX 150R
K&N Air filter W/ wrap
Prodigy Clutch
2000LB winch
FMF Powercore Turbine 2
Maxxis Alltracks 22x11-10
Redneck snorkel
2 55watt PIAA lights
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