Alright, so I took delivery of my Brisk plugs and finally got a chance to install them.....

2001 GS 500, carbs rejetted, stock everything else, 21,000 miles, daily commuter (55 mile round trip 5 days a week 75% highway at 60-80 mph), I get anywhere from 45-51 MPG with 48 MPG being the average for argument sake.

I put them in today after filling the tank to get a good base to start from.  Mind you, my NGK plugs had about 6,000 miles on them.  My bike  does not require (or seem to like it LOL) any choke when starting cold.  I usually give it a tad bit of gas and she fires right up....I hold the throttle to 2000-3000 rpms for a minute or so to warm it up, then it will barley idle at around 1000 rpm's.  Usually leaving from work, I get to a the same certain point and she seems to be pretty much warmed up (5 minutes of riding give or take in a city setting).

So after I put them in: She started the same as before, but I will have to agree with the others, she sounds alot smoother.  No real difference in that 1st five minute ride to warm it up.  After it was warm, I was on the highway and she really did sound alot healthier, the acceleration seemed to be alot smoother, although I really did not notice any increase in hp.........

1st impressions:  The bike sounds and runs smoother than before, no noticeable difference in power........I really bought these plugs in hopes of getting better MPG from my dedicated commuter bike, so I will post back up after a few fill-ups to see if I notice any change in fuel economy.....


-My 2 cents

Quote from: ned from PA on September 17, 2012, 07:10:08 PM
Has it ever occured to folks that in a multi-electrode spark plug, the spark will take the path of least resistance?  So, given four ground tabs facing one center electrode, only one spark will result, not four. 

These are a ring fire plug, not 4 ground electrodes.

mmm yeah .. the photos of the brisk plug in the mopar forum link are of different plug end type.. 

Quote from: Janx101 on September 17, 2012, 09:07:26 PM
mmm yeah .. the photos of the brisk plug in the mopar forum link are of different plug end type.. 

Brisk makes many different types of plugs.

  yeah amazin innit!? .. them folks at brisk figured out that one plug could not possibly fit everything .. and that different temps/lengths/tips/compositions would be required ... i bet they even tested them in different vehicles and conditions and maybe even with the race teams (cos they are called Brisk Racing Plugs afterall).. and have data sheets for the searching of! ... 

they still aint got back to me on suitable plugs for my turbo diesel 4wd though .. i think they holdin' out on me! 

oooooer.... i just had a awesome thought .. i'm gonna note down the plug designation for my lawnmower! .. wonder if they can do that! .. Bestest Mower EVER!! ... and for no other reason but "cos i f&^^$& CAN!) 

bahahahahha

Quote from: Janx101 on September 17, 2012, 11:45:50 PM

oooooer.... i just had a awesome thought .. i'm gonna note down the plug designation for my lawnmower! .. wonder if they can do that! .. Bestest Mower EVER!! ... and for no other reason but "cos i f&^^$& CAN!) 

bahahahahha

LMFAO

Throw a splash of 80/20 methanol nitromethane to give it some top end pop. Same mix does wonders de carbonising the GS motor too

Quote from: craigs449 on September 17, 2012, 08:06:47 PM
Alright, so I took delivery of my Brisk plugs and finally got a chance to install them.....

2001 GS 500, carbs rejetted, stock everything else, 21,000 miles, daily commuter (55 mile round trip 5 days a week 75% highway at 60-80 mph), I get anywhere from 45-51 MPG with 48 MPG being the average for argument sake.

I put them in today after filling the tank to get a good base to start from.  Mind you, my NGK plugs had about 6,000 miles on them.  My bike  does not require (or seem to like it LOL) any choke when starting cold.  I usually give it a tad bit of gas and she fires right up....I hold the throttle to 2000-3000 rpms for a minute or so to warm it up, then it will barley idle at around 1000 rpm's.  Usually leaving from work, I get to a the same certain point and she seems to be pretty much warmed up (5 minutes of riding give or take in a city setting).

So after I put them in: She started the same as before, but I will have to agree with the others, she sounds alot smoother.  No real difference in that 1st five minute ride to warm it up.  After it was warm, I was on the highway and she really did sound alot healthier, the acceleration seemed to be alot smoother, although I really did not notice any increase in hp.........

1st impressions:  The bike sounds and runs smoother than before, no noticeable difference in power........I really bought these plugs in hopes of getting better MPG from my dedicated commuter bike, so I will post back up after a few fill-ups to see if I notice any change in fuel economy.....


-My 2 cents

UPDATE:
I have had the chance to refill 3 times since installing these Brisk Plugs.  1st fill up was not that accurate because one day that I rode to work it was near tornado winds and the bike clearly struggled to get me/us through the wind to get me to work........44.8 MPG, 2nd fillup was an accurate depiction of how I ride each and every day......48.9 MPG, 3rd fillup was accurate again and I got 49.1 MPG......

My conclusion, the bike seems to run a bit better, the fuel economy went up about 1 mpg, no other differences.......My 2 cents

45 is pretty low mileage to begin with. I'd consider looking at why in general it is so low.
Nothing but short rides and all gas is wasted warming up the bike?
Warming up far longer than necessary?
Nothing but stop & go driving so all gas wasted at stop lights?
Compression problems?
Look at your plugs: running too rich? One cylinder not working well?
Valve adjustment needed?

Even with nothing but short rides (10 blocks all the time) I get 50+ mpg easily.
Good test is ong highway trips. I've gone up about 5%. From 60-65 now at nearly 70 mpg.

Quote from: adidasguy on September 30, 2012, 10:10:11 AM
45 is pretty low mileage to begin with. I'd consider looking at why in general it is so low.
Nothing but short rides and all gas is wasted warming up the bike?
Warming up far longer than necessary?
Nothing but stop & go driving so all gas wasted at stop lights?
Compression problems?
Look at your plugs: running too rich? One cylinder not working well?
Valve adjustment needed?

Even with nothing but short rides (10 blocks all the time) I get 50+ mpg easily.
Good test is ong highway trips. I've gone up about 5%. From 60-65 now at nearly 70 mpg.

Thanks for the advice, I have thought that the mileage was low and have been meaning to turn the fuel screws in a half turn to see if that boosts fuel economy.....although, I did not want to make any changes to get a fair assessment of these new plugs.  My commute is as follows:  start bike up (stored in garage) with no choke and a little throttle....hold throttle to 3,000 rpms for about a minute, then ride  off to work..........my commute is about 90% highway at speeds of 65-85 mph, the rest is a bit of stop and go city/neighborhood traffic....

When I swapped plugs, the old ones (that had 6,000 miles on them) were a nice brown color with no signs of a lean or rich condition.  I will try turning the screws in 1/2 turn and see if that helps.....I would love to get 60 mpg's!

Quote from: craigs449 on September 30, 2012, 10:42:19 AM

Quote from: adidasguy on September 30, 2012, 10:10:11 AM
45 is pretty low mileage to begin with. I'd consider looking at why in general it is so low.
Nothing but short rides and all gas is wasted warming up the bike?
Warming up far longer than necessary?
Nothing but stop & go driving so all gas wasted at stop lights?
Compression problems?
Look at your plugs: running too rich? One cylinder not working well?
Valve adjustment needed?

Even with nothing but short rides (10 blocks all the time) I get 50+ mpg easily.
Good test is ong highway trips. I've gone up about 5%. From 60-65 now at nearly 70 mpg.

Thanks for the advice, I have thought that the mileage was low and have been meaning to turn the fuel screws in a half turn to see if that boosts fuel economy.....although, I did not want to make any changes to get a fair assessment of these new plugs.  My commute is as follows:  start bike up (stored in garage) with no choke and a little throttle....hold throttle to 3,000 rpms for about a minute, then ride  off to work..........my commute is about 90% highway at speeds of 65-85 mph, the rest is a bit of stop and go city/neighborhood traffic....

When I swapped plugs, the old ones (that had 6,000 miles on them) were a nice brown color with no signs of a lean or rich condition.  I will try turning the screws in 1/2 turn and see if that helps.....I would love to get 60 mpg's!

Do what adidasguy said.  I had your same problem, and it was valves, tire pressure, and use of throttle.

Quote from: jestercinti on September 30, 2012, 07:33:40 PM

Quote from: craigs449 on September 30, 2012, 10:42:19 AM

Quote from: adidasguy on September 30, 2012, 10:10:11 AM
45 is pretty low mileage to begin with. I'd consider looking at why in general it is so low.
Nothing but short rides and all gas is wasted warming up the bike?
Warming up far longer than necessary?
Nothing but stop & go driving so all gas wasted at stop lights?
Compression problems?
Look at your plugs: running too rich? One cylinder not working well?
Valve adjustment needed?

Even with nothing but short rides (10 blocks all the time) I get 50+ mpg easily.
Good test is ong highway trips. I've gone up about 5%. From 60-65 now at nearly 70 mpg.

Thanks for the advice, I have thought that the mileage was low and have been meaning to turn the fuel screws in a half turn to see if that boosts fuel economy.....although, I did not want to make any changes to get a fair assessment of these new plugs.  My commute is as follows:  start bike up (stored in garage) with no choke and a little throttle....hold throttle to 3,000 rpms for about a minute, then ride  off to work..........my commute is about 90% highway at speeds of 65-85 mph, the rest is a bit of stop and go city/neighborhood traffic....

When I swapped plugs, the old ones (that had 6,000 miles on them) were a nice brown color with no signs of a lean or rich condition.  I will try turning the screws in 1/2 turn and see if that helps.....I would love to get 60 mpg's!

Do what adidasguy said.  I had your same problem, and it was valves, tire pressure, and use of throttle.

Valves were adjusted 6,500 miles ago and she cold starts without issue every time. Tire pressure is set at 35 psi front and rear...........I ride the piss out of this bike just like all my other bikes.

I got 43 mpg on my last fill up with mostly riding around town (stop signs and stop lights).  I have 125 mains/40 pilots/1 washer and a 15 tooth front sprocket.  I've measured compression at 135 on both sides, so I'm guessing my slightly low compression is what is causing lower mileage.  I'm not really worried about it though, since the bike runs reliably good.

Quote from: bombsquad83 on October 01, 2012, 07:15:38 AM
I got 43 mpg on my last fill up with mostly riding around town (stop signs and stop lights).  I have 125 mains/40 pilots/1 washer and a 15 tooth front sprocket.  I've measured compression at 135 on both sides, so I'm guessing my slightly low compression is what is causing lower mileage.  I'm not really worried about it though, since the bike runs reliably good.

1000th post!

Karma KORN!

- Bboy

wooohoo! 

I tried these out and all I got was trouble starting when cold. I had two mornings when the bike wouldn't start at all and force me to charge the battery after a bunch of failed starts.
It would fire and then die a second later.

When it did work I found that I have to give it a bit of throttle when starting (though that was no enough on those two occasions).

At first I thought it's the battery, but since replacing the plugs with my old NKG ones, the bike has been starting just fine every morning regardless of temperatures (needs choke of course).

It may be a symptom of something else being wrong, but caused me headaches nonetheless.

Problem..."low mileage" 

Cause: cruising at 85 MPH....

To cruise that fast, you need to make HP...Hp uses fuel...no way around it.

Solution:   The solution is NOT to be found in spark plugs...the solution is to cruise at a slower speed...since drag is the square of the speed....the faster you go, the worse the fuel mileage...

If you want to go fast AND get better mileage...then you have to reduce drag....

Put on some lower handlebars, clubmans or similar...and ride leaning forward with you head and body low....less frontal area, more "streamlined"...you will get slightly better mileage...

Or just don't worry about it....45 MPG is pretty good at 85 MPH!!!

BTW..anyone interested in the whole gas mileage thing, should go to Fuelly website and follow the whole bunch of GS 500 listed there.......You  will see a huge range of MPG from bike to bike, rider to rider, and even from one fill up to the next........many, many factors in gas mileage...driving style. is #1

A change of one MPG is therefore meaningless........when the same bike and rider often gets a difference of 10 or 20 MPG from ride to ride, fill up to fill  up...

Finally, to continue stirring the pot......The reports are starting to come in on the Brisk plugs.   Not really "farkling", are they?.....more to the "unbelievable"....



Cookie

Quote from: craigs449 on September 30, 2012, 10:42:19 AM

Quote from: adidasguy on September 30, 2012, 10:10:11 AM
45 is pretty low mileage to begin with. I'd consider looking at why in general it is so low.
Nothing but short rides and all gas is wasted warming up the bike?
Warming up far longer than necessary?
Nothing but stop & go driving so all gas wasted at stop lights?
Compression problems?
Look at your plugs: running too rich? One cylinder not working well?
Valve adjustment needed?

Even with nothing but short rides (10 blocks all the time) I get 50+ mpg easily.
Good test is ong highway trips. I've gone up about 5%. From 60-65 now at nearly 70 mpg.

Thanks for the advice, I have thought that the mileage was low and have been meaning to turn the fuel screws in a half turn to see if that boosts fuel economy.....although, I did not want to make any changes to get a fair assessment of these new plugs.  My commute is as follows:  start bike up (stored in garage) with no choke and a little throttle....hold throttle to 3,000 rpms for about a minute, then ride  off to work..........my commute is about 90% highway at speeds of 65-85 mph, the rest is a bit of stop and go city/neighborhood traffic....

When I swapped plugs, the old ones (that had 6,000 miles on them) were a nice brown color with no signs of a lean or rich condition.  I will try turning the screws in 1/2 turn and see if that helps.....I would love to get 60 mpg's!

Quote from: craigs449 on September 30, 2012, 08:04:37 PM
Valves were adjusted 6,500 miles ago and she cold starts without issue every time. Tire pressure is set at 35 psi front and rear...........I ride the piss out of this bike just like all my other bikes.

According to the Wiki, you may need to check valves again:  http://wiki.gstwins.com/index.php?n=Maintenance.MaintenanceSchedule

Valves need inspected at the initial 600 miles, and every 3500 or 4000 miles thereafter.

If you have already done this, then never mind. 

Hello
I bit the bullet after the truly persuasive post by Adidasguy, and bought these spark plugs. Not that I was having any issues with my bike, other than having to keep the choke on for about 5 minutes after starting it.
I kept them for about two months, but I finally took them out last night.
Ever since I installed them, I've had nothing but hard starts. 3 to 5 seconds cranks. Yesterday morning it actually drained my battery. Did the same in the afternoon, and I had to push-start it (not fun!).
Fuel mileage did improve, but not more than 10%, and power change was imperceptible.
My bike has stock air filter and 20/60/130 jets.
My conclusion is these plugs are far, far from being worth all that money. As soon as I replaced them with my "regular" plugs, the bike seemed to really enjoy being started. Same this morning. It was cold(ish) (50F), but the engine got going pretty much immediately after I pressed the switch.

Mauricio

Two things come to mind:

1. Bad connection. The little cap has to be unscrewed to expose the threads which our spark plug cap slips on.

2. Not fully installed. Our regular plugs use an 18mm wrench. The Brisk plugs use a 16mm wrench. Attempting to install them with a 18mm wrench and you will not get them tightened down properly.

Either of the above would result in them not being properly installed and hence poor performance.