Sparkplugs. They do more and can tell you more than you might think.

[crazydj]

waa, a few months..i thought every 1 month or 3000km change plug?wider maybe due to heating of it over a long period of time causing it to expand permanently..

 

Haha. If 2 stroke bike, can change every month. But single cylinder 4 stroke ah pek bike? 1 years also can use the damn plug, as long as you just regap it every once in a while...

[velocity325]

kao..now i'm starting to regret on 2stroke..2t so expensive..petrol consumption quite big..ears going deaf..pocket has a big burning hole..

[xunknownz]

I like !

Thanks for sharing

[ezzyoiler]

it suddenly dawn on me...that the inlet/exhaust valve can actually interfere with the spark plug electrodes if everything goes bad at the same time...haha..i may be wrong...

anyway i will be worried if the gap closed up rather than increase....

[velocity325]

so should we get iridium instead of normal spark plugs for 2b bikes?

[ezzyoiler]

the choice is yours...small bike no need iridium imho

[Jehuty]

so should we get iridium instead of normal spark plugs for 2b bikes?

 

For stock everyday use? Stick to normal ones. For race, doesn't hurt to draw every ounce of HP from everything while still keeping the bike rideable so yeah.

[crazydj]

For stock everyday use? Stick to normal ones. For race, doesn't hurt to draw every ounce of HP from everything while still keeping the bike rideable so yeah.

 

So can i put a C6 or C7 iridium in my YBR? Will i get extra noticeable powahhhhhhhhhhh??

[crazydj]

For stock everyday use? Stick to normal ones. For race, doesn't hurt to draw every ounce of HP from everything while still keeping the bike rideable so yeah.

 

So can i put a C6 or C7 iridium in my YBR? Will i get extra noticeable powahhhhhhhhhhh??

[velocity325]

For stock everyday use? Stick to normal ones. For race, doesn't hurt to draw every ounce of HP from everything while still keeping the bike rideable so yeah.

 

err, yea..stock, more for touring for around 100km +/- when free..but quite a old bike so don't know had block been bore before as FC a little high..

 

 

the choice is yours...small bike no need iridium imho

For stock everyday use? Stick to normal ones. For race, doesn't hurt to draw every ounce of HP from everything while still keeping the bike rideable so yeah.

 

but, iridium spark plug definitely last longer then the normal ones yea? so can i say when i change eo, no need to change plug that frequently?

[ezzyoiler]

spark plugs..can last 15000km easily.....and its a few bucks only..

 

small hp bikes...you wont feel the diff....

 

you want low cost hp improvements...get your bike exhaust header wrapped..

gives you increase hp....most can attest to that

coverup your tired looking pipes..gives it a new look..

cooler ride..

louder exhaust with lower rumble...

 

compared to expensive irridium plugs...not sure whether it gives increase hp...maybe it does...but conventional thinking is that the improvement is so small that you wont feel it...spark plug is the last thing we worry about as a few bugs or a few minutes in cleaning and ressetting gap can go a long way..

[velocity325]

ohh! i didn't know plugs can last 15k km..still thought every time replace eo also replace spark plug as thats the package by the shop..thanks lots yea! heys, wrapping the header, where can i do it?

[ezzyoiler]

i do wrap....call me..see my signature contact is there..most 2b bikes single cylinder ..wrapping is $40.

[velocity325]

i'm going parkway parade later! you want wrap my exhaust single cylinder at the carpark ?

[ezzyoiler]

call me...wrapping at bayshore rd...a 5 min ride from parkway..

[ezzyoiler]

i'm going parkway parade later! you want wrap my exhaust single cylinder at the carpark ?

ok if you are willing to pay transport cost...

[crazydj]

My bike manual say that my bike's spark plug is a CR6HSA. I currently now have it, and for a few years already, fitted with a C7HSA. I had it fittied with a CR7HSA, but there is no difference between all the three.

 

So what is the difference between resistor (CR7HSA) and non-resistor (C7HSA). Their specs are exactly the same except for the resistor and non-resistor.

 

Also, from reading stuff online, why not everyone just get a plug with a cold rating instead of one with the hotter rating? Like for the CXXHSA series, there are C6, C7 and C8. Might as well get the C8 right?

 

EDIT: http://www.ngksparkplugs.com/tech_support/spark_plugs/faqs/faqresistor.asp?mode=nml

 

Oh dear!!! Is this really true? Non-resistor spark plugs will create massive interference with electricals?

[ezzyoiler]

Q: When should I use a resistor spark plug?

A: NGK "R" or resistor spark plugs use a 5k ohm ceramic resistor in the spark plug to suppress ignition noise generated during sparking.

NGK strongly recommends using resistor spark plugs in any vehicle that uses on-board computer systems to monitor or control engine performance. This is because resistor spark plugs reduce electromagnetic interference with on-board electronics.

They are also recommended on any vehicle that has other on-board electronic systems such as engine-management computers, two-way radios, GPS systems, depth finders or whenever recommended by the manufacturer.

In fact, using a non-resistor plug in certain applications can actually cause the engine to suffer undesirable side effects such as an erratic idle, high-rpm misfire, engine run-on, power drop off at certain rpm levels and abnormal combustion.

[ezzyoiler]

if your spark plug has a clicking/cracking sound when your bike is turn on...

that is electrical interference...

electronics system, ecu etc may be affected..

 

for basic classis bikes pre ecu....the effect is that the bike performance will be affected too,,,a cracked plug is not surprising...

for all those who dont understand whats all this is....stay with mfg reccomendations...

u dont have to reinvent the wheel...

[crazydj]

Hmm, my manual recommends a resistor spark plug. So i should use a resistor spark plug?

 

I may be on to something here and why YBR magneto always spoil. Because people always put a non resistor plug inside. Could there be a remote possibility that it could be because of this? Haha.

[velocity325]

ok if you are willing to pay transport cost...

 

i think one day i go down to bayshore:) btw, read about the resistor thingy..for yamaha rxz japan edition, what should the plug be?

[crazydj]

Hey guys!

 

For my bike, it is recommended that i use a spark plug with a heat rating of 6. The particular recommended spark plug is CR6HSA. For years, i have been using the C7HSA which is 1 level 'colder' than recommended and it is a non-resistor type.

 

I just swapped it for an CR7HSA and it is noticeable much quietier and smoother. Psychological? I don't know. My question here is that, what is actually the best heat rating for a YBR 125? For NGK sparkplugs, i can fit basically 9 spark plugs from NGK. (From my understanding)

 

They are:-

Normal Non-Resistor

C6HSA

C7HSA

C8HSA

 

Normal Resistor

CR6HSA

CR7HSA

CR8HSA

 

Iridium Resistor

CR6HIX

CR7HIX

CR8HIX

 

I understand the benefits of using a resistor type spark plug as it insulates the plug and does not interpreter with the bike's electronics. However, my bike's default recommended spark plug heat rating is 6 (Hottest). However, i have been using 7 (Middle) and everytime i change my sparkplugs, whether DIY or go to shop, it is always recommended that i use one with a heat rating of 7.

 

I understand that too hot a plug will result in, well, a hot engine. Too cold a plug, and the self cleaning process (where the heat is required to completely burn off the fuel, carbon, etc) will not be as successful.

 

The questions here is that, which heat rating should i be using and why do mechanics, spare parts shop uncles all recommend using a spark plug with a heat rating of 7 instead of the manual recommendation of 6? Is it because my YBR engine too hot or is it because a heat rating of 7 is more common throughout Singapore?

 

Thanks.

[ezzyoiler]

spark plugs are specified by heat range...

 

common sense dictates to follow mfg.. reccomendation...ie mfg recommendations are uausally based on the assumption that you ride the bike as most riders do..the acerage dude rider..

 

hot plugs are meant to run your bike hot,,do you want that?? if you ride short distances say less than 15km..i would use a hot plug...

i you are a long distance rider say more than 20 km..i would use a cold plug...

 

at the end of day you decide..

 

but take note the classification of spark plugs is based on simple engines..ie dinosaur engines..

 

now a days wih all sort of electronic controls...the heat range may be no longer valid..as the controls ie ecu etc,,will make sure the bike engines is run at conditions set...cold or hot plugs is not that crictical any more..unless you chose to other wise..

 

so take your pick...i would follow mfg reccommendations.

[velocity325]

anyone knows whats the maunc rccmd for rxz?

[S750WP]

Normal spark plugs are good for 20,000km, and I replaced mine annually even though I did not clock 20k annually as it does not cost alot and can be DIY easily.