BBR D3 Exhaust w/ Carbon End Cap - TTR125 RockyMtn Primary driven gear included

Primary driven gear included

we find the weak OEM valve springs hit a limit at 10

TB Race cams V25 & V35

These are definitely not the cheaper poor quality aluminum Chinese $75

BBR D3 Exhaust w/ Carbon End Cap - TTR125 RockyMtn Primary driven gear includedD3 Exhaust System TTR125 BBR's new D3 exhaust is the latest generation in BBR's legendary D Section exhaust systems. This design incorporates an air craft quality stainless steel header that has been tuned specifically to optimize performance and power gains. An all new, lightweight "D" profile muffler is used to drastically reduce weight on all models. BBR's unique "D" muffler also allows for maximum tire clearance and packing volume. A lightweight