MODENAS CT100: AIR FILTER REPLACEMENT. WHEN?

Modenas motorcycle, especially CT100 require air (oxygen) as part of combustion system. And clean oxygen will provide smooth combustion process in the engine. 

Thus, air filter are common part installed in motorcycle to filter air before entering the engine for mixture with fuel. Good air filter will make sure that the engine able perform reliably, smoothly, without the feeling of hesitation.

Figure 1: Air filter for CT100 share the same part with Kriss

What Happen if Air Filter is Bad?

Bad air filter will usually leads to loss of power, feeling of hesitation when throttle level is increased. Bad air filter ( such as dirty filter) usually caused not enough oxygen entering the combustion chamber during the combustion process. 

This will lead to incomplete process of combustion. Especially at higher rpm due to the more air capacity needed for combustion, while dirty air filter can only pass less air than required.

Figure 2: Modenas CT100, air filter box located on the front. Require removal of front cover

Therefore, air filter replacement are very important for CT100. Normal practice, air filter are replaced every 20000 to 30000 km distance. And the cost for air filter is quite cheap around RM3 and its share the same part with modenas kriss.

In between, can alway clean the filter every 5000-7000 km.

Tools:

1) Screw driver

2) Spanar various sizes

3) Clean tissue towel.

Parts:

1) New Air filter (cost RM3)

Working Procedure:

1) Park the motorcycle on the double stand.

2) Remove front cover.

Figure 3: Once front cover is removed, air filter box can be observed.

3) In order to replace air filter, air filter box need to be taken out from the motorcycle body. Thus, remove four screw holding air filter box.

Figure 4: Replace air filer with new one.

4) Carefully replace air filter.

5) Installation is in reverse order.

Thank you for reading this. Hope this guide help anyone with this kind of problem.