When I fitted a set of Rush slip-ons to my new Slim (plus a set of appropriate XiEDs to help with the usual heat issues), the decel popping I could quietly hear even with the original mufflers became obviously considerably more pronounced.

I'd heard interesting things about Brisk spark plugs and went to their web site to have a look. They claim their plugs are more efficient and are able to ignite fuel in the engine more completely. One tends to be suspicious of this kind of stuff, but I decided to try a pair.

The difference is quite extraordinary! My decel popping has all but disappeared and the motor feels more responsive and perky. I assume this is because these plugs are burning more fuel inside the engine so less gets out to be consequently ignited by the hot headers. The plugs are more expensive than regular ones, but it's money well spent in my humble opinion.

There are various equivalents available from Brisk, but the plugs I bought are their BOR14LGS type.

 

I suspect your diagnosis is a bit awry! As bone stock your bike was running with a very lean air/fuel ratio, to comply with exhaust emissions regulations. So there ain't any surplus fuel to burn! Changing mufflers will have made that lean condition worse and adding Xieds is only patching over the problem. They have plainly not compensated properly for your new mufflers. A change of spark plugs is simply another patch!

If you have your bike tuned correctly by a competent dyno operator, to run on optimum settings instead of the compromised ones you currently have, you will have no popping and a much sweeter running bike. The money you spent on Xieds and plugs would have been better spent on a tuner.

 

Or maybe he sells those plugs? I've never heard of them.

 

Respect to the previous posters.

Decel popping occurs when one of two things are present.

1. The bike is so lean the exhaust is superheated and is burning the unburnt fuel that is in the pipes (there is always some unburnt fuel in the pipes no matter how lean). This is very rare, and does not occur with the stock map and free flowing pipes being the only change.

2. The AFR IN THE pipes is just right to burn the unburnt fuel. This is quite a common occurrence when free flowing pipes are installed (whether or not a free flow A/C is installed).

To get rid of decel popping a lot of people put MORE fuel than is needed into the engine/over-richening the AFR so that more unburnt fuel goes into exhaust, changing the AFR in the exhaust so that is no longer optimum for combustion in the pipes. This is just a waste of gas. And if using decel enleanment found on most tuners it is still really hard to get rid of the popping/burbling when the injectors kick back in at about 1750 rpm.

Another way to get rid of decel popping is to change the AFR in the pipes (mufflers/Slip-ons). This can be done with different baffles, a lolipop or Thunder Torque Inserts. The benefit to the TTI's is that it will let you keep your sound, increase the low and mid range power, and reduce/eliminate the decel pop by reducing/eliminating reversion, thus changing the AFR (in the pipes) to one that is not conducive to combustion.

 

Maybe you’ve missed the point I’m trying to make, guys. What I’m saying is that these particular plugs are obviously doing a better job than the standard ones at burning the fuel while it’s still inside the engine, as less is getting out and igniting in the pipes. The evidence for this being no popping now. I don’t think that’s flawed logic, in all fairness. The proof of the pudding, etc... The only mod I’ve done thus far is to fit the slip-ons; the air cleaner is still the stock one and my dealer advised me (rightly or wrongly) that the ECU could cope with a minor change like this with no problem and no damage probability. And, although it’s not a perfect fix, the XiEDs have made the motor run noticeably cooler. Plus, my mpg has improved a little. When the time comes to do any further upgrades, I’ll be looking into more serious adjustments but, for now, my bike sounds and feels very much happier.

Just trying to pass on a positive experience of a product that may be of use to anyone, whatever state of tune their bike may be in.

 

Just because I'm saying I got a good result with some new plugs, I'm obviously selling 'em! What a cynical world.

Here's the website. Take a look then you will have heard of them!

http://www.briskusa.com/

 

ok...

 

Agree with you that there are better plugs available than what the factory installs . There is also much more efficient oil , filters , etc. etc.
If going to more efficient spark plugs have slayed your dragon , then you had a good day ., But ... i would still have my doubts that your original problem has not been corrected , only patched up as advised .?
Suggest a visit to a reliable tuner shop that is experienced with aftermarket exhaust systems etc. would be a good idea and money well spent .
And ... you could sleep better knowing all is well.

 

No, we're trying to politely point out that spark plugs will not cure an underlying short-coming in the state of tune of your bike. You have rubbed soothing cream on itchy spots, but haven't cured the cause of the infection!

rubberfrog, I don't know if you realise that photo is of Grayson Perry, an English eccentric. A particularly apt pic!

Sorry Dixi, couldn't resist.

 

Appreciate your input, guys. On the other hand, I feel it's a bit rich to allude that the Brits may be eccentric when you guys have had the likes of George Dubya as a president and Mitt Romney as a potential one!