Cannondale ATV Owner's Manual - page 141

139

EXHAUST

Spark arrester cleaning

The spark arrester must be purged of carbon build up at 

the intervals specified in the maintanace schedule of this 

Owner’s Manual.        

1. Move the vehicle to a suitable outdoor location. Place

the vehicle on a level surface, shift the transmission into

NEUTRAL and apply the parking brake. Make sure the

engine and exhaust system are completely cool. 

2. Remove the purge bolt, and start the engine. 

3. Increase the engine speed with the throttle lever

repeatedly while momentarily blocking the end of the

muffler / spark arrester with a clean shop towel, then

quickly remove it. This technique causes brief system

back pressure and will force carbon build-up out the

purge bolt hole. Also, while performing this procedure

to help dislodge carbon build-up, gently tap the muffler

housing with rubber mallet. Continue this technique and

discontinue after 1 minute. Limiting yourself to under 1-

minute helps reduce the risk of burns from the exhaust

system which will reach very high temperatures.

4. Stop the engine and allow it to cool completely. Then

reinstall the purge bolt securely.

1. Muffler/ spark arrester

2. Purge bolt

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