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BR400 UD
How to power upModifying Parts:
3.Exhaust Muffler
1.Intake manifold
2.Carburetor
How to power up1.Intake manifold
● Cut off the pipe A.
● Remove the seat and then remove the intake manifold.
A
How to power up2. Carburetor
● The modified parts on the carburetor.
● Remove 4 cross-head screws on the tail cover of the carburetor.
How to power up
● The look of disassembling.
● Modify the jets.
For the main jet of 400CC, change from #127.5 to #145 For the slow jet, change from #37.5 to #42.5
For the main jet of 300CC, change from #127.5 to #132.5
How to power up3. Exhaust Muffler
● Remove 3 screws on the tail cover of the exhaust pipe.
● Take off the dB killer and a gasket. (no longer useful).
How to power up● Reinstall all the disassembled parts in order.
● The look of re-assembling.
Inner tube taken off