For about a week now, I have trouble starting up my bike. Initially it took like 2 cranks to fire it up. On Monday, however, it took me four cranks (and a lot of anxiety) to fire it up. The bike has done about 37,000 km worth of mileage (over 18 months).
After asking around in the bikers community, I was told to inspect the spark plugs. It's about time I guess. The last time I replaced the plugs is around 20,000km mileage. It's over 17,000km now. I'm supposed to check the plugs every 12,000 km. Facepalm.
Since replacing the spark plugs require the removal of the fuel tank AND the airbox (which contains the air filter), I thought, might as well replace the air filter (which is due every 20,000km).
I was given two choice for the air filter - the stock Kawasaki air filter, or the DNA aftermarket air filter. The DNA filter costs twice as much as the original filter, but there's one nice thing about it - you don't have to replace it again, ever. All you need to do is use the DNA filter cleaner during service time to clean it up.
It has higher airflow too!
[source]
As for the spark plugs, I choose to use NGK Iridium spark plugs, since it has been mentioned a lot (both by car and bike enthusiasts), and I have been hearing good stuff about it.
The deed is done at Bikerz Station (excuse them for that kiddy spelling) at Jalan Sentul. This shop is more commonly known as 'Kedai Ah Fai' ('Ah Fai's Shop').
The Cost
DNA Air Filter - RM 300.00
NGK Iridium Plugs (2 units) - RM 110.00
Engine Oil (Sikolene 10w-40 Semi-Synthetic - 2 litres) - RM 76.00
Kawasaki Original Oil Filter - RM 35.00
Labor & Workmanship - RM 35.00
Total Cost: RM 556.00 (I paid RM 550.00)
Total time spend waiting: ~ 60 minutes
The Verdict
The bike now fire up excitedly at every crank (ok that spark plug change really make a difference). The combo of the high-flow air filter, new more powerful spark plugs and fresh engine oil gives a dramatic impact on the bike's response. Especially apparent on revs between 4,000 to 9,000 RPM, the engine feels ultra-smooth, but the most significant is the acceleration. Before this, even with fresh engine oil, the bike is not this eager to go. It feels great, responsive and exciting to ride now.
I highly recommend this combo (the filter and the plugs). It really does make a lot of difference! Has anyone tried this combo? How does it fare for you guys?
p/s: Phew, now I can hold off that urge to get a 1-litre bike for a while more.
More Details:
DNA Air Filter product page
NGK Iridium product page
Sikolene Semi-synthetic product page