Spark plugs

[turner]

im in need of some new plugs for my 1991 250 bandit and i no the standard plugs are the NGK BR8E, but i have seen that i can get the BR8ES at about half the price, i just wondered if anybody knew the difference and if they would fit in my bike?

[mossy1200]

im in need of some new plugs for my 1991 250 bandit and i no the standard plugs are the NGK BR8E, but i have seen that i can get the BR8ES at about half the price, i just wondered if anybody knew the difference and if they would fit in my bike?

I think the difference is the s stands for screw on tip type.The nipple on the top screws off.Br8e it wont.Im thinking that aircraft wont be able to use ES incase the tip unscrews but wont mater on your bike.the R stands for resister and the 8 is a messure of ignition temperature.

should be all good to use the br8es they prob half the price due to being more common and could even be the small top thread area allows easier manufacture process with the porcelin.now im deep into guessing.

[spanner spinner]

I use to sell ngk's for a living and the s designates the firing end construction, it will be fine to use the br8es as it interchangeable with the br8e. have a look at the link below for a full discription of what the letters and numbers mean.

http://www.ngksparkplugs.com/docs/tech/design_symbols_plugs.pdf

[nzspokes]

I use to sell ngk's for a living and the s designates the firing end construction, it will be fine to use the br8es as it interchangeable with the br8e. have a look at the link below for a full discription of what the letters and numbers mean.

http://www.ngksparkplugs.com/docs/tech/design_symbols_plugs.pdf

Cool, gunna pick your brains then. Ive read that on a bike that running rich you go to a cooler plug. My bikes spec is a 8 but its running 9 plugs. It is running a bit rich. Will going to an 8 help?

[nzspokes]

Cool, gunna pick your brains then. Ive read that on a bike that running rich you go to a cooler plug. My bikes spec is a 8 but its running 9 plugs. It is running a bit rich. Will going to an 8 help?

Ignore me, just read your link. Great info. Gunna save that. It should be a sticky under maintenance.

[imdying]

Cool, gunna pick your brains then. Ive read that on a bike that running rich you go to a cooler plug. My bikes spec is a 8 but its running 9 plugs. It is running a bit rich. Will going to an 8 help?No, fixing the jetting will help. You wouldn't replace the carpet in your house if the plumbing was fucked, would you?

[FJRider]

No, fixing the jetting will help.

A look at the air intake at least. The wrong air filter(blocked ???) setup would do that.

Unless he's messed with the jetting already ...

[imdying]

A look at the air intake at least. The wrong air filter(blocked ???) setup would do that.

Unless he's messed with the jetting already ...

Good thinking Batman. Of course, if the motor is just plain tired, which can look like it being too rich, then sure a slightly hotter plug make reduce the intervals of fouling.

Given it's a 91 Bandit, I would be looking to track down Ian of Just Motorcycles fame, and see if he can sort out a stainless hardware kit for the (probably slogged out) carbs. Seems to be a reoccurring theme with them. Of course, correct diagnosis is the first challenge.

[FJRider]

Good thinking Batman. Of course, if the motor is just plain tired, which can look like it being too rich, then sure a slightly hotter plug make reduce the intervals of fouling.



I recall a thread of his regarding his air filter. I don't know if his issues regarding that were resolved.

[turner]

I use to sell ngk's for a living and the s designates the firing end construction, it will be fine to use the br8es as it interchangeable with the br8e. have a look at the link below for a full discription of what the letters and numbers mean.

http://www.ngksparkplugs.com/docs/tech/design_symbols_plugs.pdf

just got the br8es spark plugs through the post today and found out that they are completely different, the br8es thread is almost double the thickness of the br8e. oh bugger

[Taz]

You sure your plugs aren't supposed to be DR8E or CR8E, A B series plug would be too big for a bandit.

[GSF]

You sure your plugs aren't supposed to be DR8E or CR8E, A B series plug would be too big for a bandit.

Yeah dude, you may want to check this. My '92 Bandit 250 eats NGK CR8Es, which are the OEM plug.

[nzspokes]

He's from Manurewa - they do things differently there.

Im not from Manurewa. HTH champ.

[spanner spinner]

just got the br8es spark plugs through the post today and found out that they are completely different, the br8es thread is almost double the thickness of the br8e. oh bugger

all b series (first letter on the plug) are 14mm thread size regardless of any numbers or letters that follow, I think that you may be looking for cr8e's not br8e's, cr8e are 10mm thread size. I looked up the listing for your bike and cr8e is what is listed as fitment, where did you get the BR8e number from?

[spanner spinner]

Yeah dude, you may want to check this. My '92 Bandit 250 eats NGK CR8Es, which are the OEM plug.

check the compression and carb slides, these models are good at losing ring tension that drops compression they then carbon up the plugs as the combustion temp is not hot enough. they also wear out the sealing face of the carb slides on high milage bikes the mixture then goes out the window fouling the plus again. You could try running a cr7e to give the plug a bit more life.

[GSF]

check the compression and carb slides, these models are good at losing ring tension that drops compression they then carbon up the plugs as the combustion temp is not hot enough. they also wear out the sealing face of the carb slides on high milage bikes the mixture then goes out the window fouling the plus again. You could try running a cr7e to give the plug a bit more life.

Yeah, my Bandit has a dicky piston ring on the #2 cylinder so compression is slightly down. Other three are fine, shouldn't develop into an issue while I own the bike - only 6 months until 6F.

You're dead right though, when I first got it there was a huge amount of mucking about with carbs to be done and I went to a slightly hotter plug. After that it has been running mint ever since with a carby synch and fiddle every couple of months. :)

[turner]

Yeah dude, you may want to check this. My '92 Bandit 250 eats NGK CR8Es, which are the OEM plug.

ye, you are right, dont know how i misread that ????

[GSF]

ye, you are right, dont know how i misread that ????

Yeah, I thought a B-sized plug seemed odd. Bike shop I used to work at, we used a lot of B-size NGK plugs and they usually (from memory) went into big twins like Hinckley Bonnies, Norton Commandos, that sort of thing.

I don't know if you're already wise to this, but there are some good resources that have been bloody invaluable to me in the last two years I've owned the little Bandit.

1st is this Sunnyside Feelin' dude, it's all in Japanese. Run it through Google Translate and go to the Bandit 250 section. Sometimes it turns into really cryptic Jinglish but you get the hang of decoding it after a while. Good maintenance info and specs.

http://www1.synapse.ne.jp/s-hara/

2nd is the message board Bandit Alley, I get lots of good help with the 250 there.

Also find a workshop manual for the Suzuki Across, it's got the same engine as the 1990-1994 Bandits.

http://suzukiacross.org/downloads/