I leave it on.

spark plugs, especially high end ones, dont seem to make much of a difference in terms of feel

Good morning, Bro! And many tks 4sharing...
Am contemplating making this "investment" real soon... Reason/need for questions & answers now...

I removed those but the residue stays. How to remove the residues?

Try using iso-propyl alcohol (alcohol swaps) or WD40? Works in my case...

A friend once said, don't fix it if it ain't broken.

Good morning, Bro! And many tks 4sharing...
Am contemplating making this "investment" real soon... Reason/need for questions & answers now...

Haha! That was a great shot, Bro! Think me felt that one...

Generally, you do not purchase spark plugs for performance enhancement. While DENSO Iridium Power spark plugs have contributed to numerous accomplishments through dyno-testing and actual use, their true benefit lies in their efficiency, durability, and improved firing power. Serious tuners modify their vehicles by increasing boost through turbo-chargers, super-chargers, and Nitrous. They are also known to add high-energy ignition systems, tinker with timing, adjust fuel mixture ratios, and increase horsepower through other means. Putting these kinds of demands on their engine increases the need for an efficient, durable spark plug that can handle these kind of harsh environments. That’s where DENSO Iridium Power can make a major difference.

LCP?

THINGS THAT WORK (improving engine performance directly, even without the synergic effect from other modifications):
1. adjustable fuel regulator
2. lightened crank pulley
3. high lift and high overlapping angle camshaft
4. adjustable cam gear
5. tuned length exhaust header with suitable piping and muffler system
6. cold air intake
8. increase the compression ratio
9. advance the ignition timing
10. engine balancing and blue printing
11. head port & polish
12. ECU piggyback, stand alone, rechipping
13. engine re-bore, re-stroke and rebulit.


THINGS THAT WORKS WITH CONDITION (only work when at least some of the modifications in the first list was done):
1. ignition system upgrade
2. water/methanol injection
3. additional or bigger heat exchangers
4. thermo wrapping of the exhaust system


NICE THINSG TO HAVE (not neccessarily adding power but will help you in extracting more from the engine, or to prevent damages)
1. gauges
2. silicone radiator hoses
3. oil catch can
4. better clutch
5. ground cable
6. voltage stabilizer
7. magnetic oil sump bolt, magnetrap
8. powerbelt
9. aluminum fuel rail (for those with composite fuel rail)
10. high amperage alternator


THINSG THAT DO NOT WORK (or are too high in term of cost/performance value, or you can simply DIY):
1. microkompressor and MOST air leaking device
2. all sorts of magnet for the air and fuel, unless it`s for the
crankcase lubricant
3. all sorts of air swirling devices, active or passive, for the intake
track.
4. MOST fuel additives, octane booster, etc
5. Stickers.

Haha... anyway, if you change to iridium, please update us. Maybe wanna change to that too

Quoted from drexchan

I removed those but the residue stays. How to remove the residues?

Try using iso-propyl alcohol (alcohol swaps) or WD40? Works in my case...

Jam at MRR2 Taman Melawati till Keramat... spotted so many FLXs. SO many of them are Elegant Brown somemore. lol
BTW, sleep first. Good nite / morning.

Hi guys.. i have some inquiries regarding service.

i did my first 1,000km service on 31/5/2011. Now 3 months have passed and my mileage is only 2,600++km..

Do i need to bring my car for 2nd service? 

Thanks all for the help. 

Cannot start my car...I'm clueless of what to do 

Morning guys.. 

Can any sifu help me clear my doubt? thanks.. 
I cant find any info anywhere.