Segway SNARLER AT6 S Owner's Manual page 159

MAINTENANCE, STORAGE AND TRANSPORTATION
The exhaust pipe must be cleaned of accumulated carbon
periodically as follows:
1
Bolt M6*16 (3 PC)
1. Remove 3 pieces of M6*16 bolts.
2. Start the engine and rev it up about 20 times. At the same
time, use a towel to plug the end of the muffler, instantly
generating exhaust system pressure.
3. Allow the engine exhaust pipe to cool.
4. Reinstall the muffler spark eliminator and bolts.
2
Muffler spark eliminator
151