A suggestion for bjs, and his "BROKEN REAR STUD WOES"
2) Used part of original muffler to add extra BELLY to the expansion Chamber.
1) Used part of original muffler to add extra BELLY to the expansion Chamber. the original pocket expansion is only 170cc =way to small fo a 66c
Piston Modification montage
A suggestion for bjs, and his "BROKEN REAR STUD WOES"
34RED other side. Tidy, to loud also.
Stock muffler. internal cut
34RED Expansion specific to this bike. Unreal bottom end / hill climb and against the wind. BUT useless for top end. need more belly. *******
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A suggestion for bjs, and his "BROKEN REAR STUD WOES"

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