Segway SGW570F-A3 Manual page 160

MAINTENANCE
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 generate exhaust system pressure;
3. Make the engine exhaust pipe to cool.
4. Reinstall the muffler spark eliminator and bolts.
2 Muffl er spark eliminator
154