Spark plugs

[hayabusa_83]

well, unfortunatly its about that time. (7100 miles and counting) it is said that you should change em out around 7500. which is when i planned on changin' the oil next. how difficult is it? anything else i should do @ this time? i got new tires on, change oil every 2-3K miles, etc. how much are they? where is the cheapest to get them? what kind do u recommend? brief walkthrough available? ETC
sincerely,
Brian~ ArchetypeBusa

 

[hayabusa_83]

hasnt anyone change their damn plugs???

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[busahaya]

It shound'nt be that difficult to do. Just be carefull when reassembling the airbox on the intake. As far as what brand, I would just go with the stock plugs, but that's just a matter of preference, hope this helps...

 

[bigdr]

Not a difficult job .Just take your time. Unless you have a preference for brand type just replace them with same rating , and keep your old ones. you never know when you might need one..

 

[Bronto]

Four NGK CR9E Spark Plugs on Ebay. Auction ends June 6. New spark plugs are regularly up for Aution.
Four NGK CR9EIX Iridium Spark Plugs Ebay Seller has em for $24 set of four. Aution likely won't end soon. Seller has 84 sets to sell.

 

[manatrader]

Go with what Bronto said, great plugs, you will need an 6" extention for your socket otherwise it should only take about 30 minutes to get to them. You do have to remove the tank unless you can figure out how to get the airbox out without taking the take off. I just took the tank off, my plugs where fine, but I replaced them anyways since I was already in there. Next time I will let them go for 11,000 miles.

 

[vulture]

I just bought some NGK Iridium IX plugs for a change this weekend. I will post if there is any problems, otherwise they are great.

 

[hayabusa_83]

cool..... is anything else needing to be done at the 7500 mile mark? fluids, etc?

 

[jmaz268]

I have the iridium plugs in mine, very simple install.

Be very careful removing the clip on the plug wires. They are very brittle.

I noticed a fair improvement in idle smoothness and acce., but it may have just been me.

 

[moondog]

Look at your coolant bottle, there will probably be some build-up in the bottom, looks like brownish white powder. 7500 is a good time to drain & refill. Print the 7500 mile service schedule off the sticky pinned shop manual, do it all. The plugs looked perfect, gap still right where it needs to be, still replaced them. Didn't run any different.

 

[Nijinsky3]

Anyone know exactly what thread mm's the plugs should be or what reach they are supposed to have? Also what is the gap?

I am trying to order some for our 2002 and the book only shows thread mm's and reach, it doesn't specify what plugs are for what bike....

 

[Wag]

I just used stock plugs last time on mine. They were very clean so I'm letting it go a little longer this time. I always double check the gaps before installing. Sometimes they are not quite right out of the factory box.

I just used the spark plug wrench that came with the bike. Works just fine.

As jmaz said above, the clip for the wire is VERY fragile so be careful with it. I broke the third one from the left and had to craft a new one out of some steel wire. PITA, really. I don't feel like buyin' a new one!

Not a difficult job, either. MAKE SURE you don't cross thread 'em goin' in. You do NOT want to have to buy a new header!

--Wag--

 

[pure_ego]

yup.. looks like you got plenty of good info..

'bout all I can think of to add is remember which hoses go where... marking them would be great.. I just dunno an easy way to do it righ toff.


one other thing.. if your sitting on the bike.. there is a little sensor thing on the left rearward side of the airbox with a vacuum hose going to it... when you take that hose off there is a thing nipple that sticks out where it came from.

Be careful with that thing moving the airbox around and such..

I sat mine down and took the air filter out.. musta put a bit too much pressure on it and it broke the little nipple thing.. I just fixed it with a bit of plastic and a little propane torch thing.. but still watch out for that nipple. ..

other than getting the airbox out it's simple... also the spark plug remover in your tool kit works excellent.. no point buying junk you don't need afterall.

You may want to also put a little dab of dialectric silicone into the plug wires.. supposed to guard against corrosion and ensure a good connection.

 

[omslaw]

I started to have rough idle that progressed into noticable stutter when under hard acceleration; so much stutter that a 600 would leave me in the dust!

I picked up some NGK Iridiums at my local Advance Auto Parts (yeah, they had 'em $7 ea.) and replaced the plugs. WOW! What a difference! That was my problem! Of course, I have 8300 mi...guess it was time!

I was able to change them without removing the tank. I instead, loosened the inner panels and just 'flexed them' outta the way to remove the airbox.

Gap is .7mm - .8mm

Good Luck!