Another noob question

Got my paws on an 08 SD. It came with after market cans (Leo Vince). I think thats all the goodies it's got on it During engine deceleration I get a lot of back firing. Is this normal? If not what's the cure and how much will it cost me. Thanks for helping out the new guy.

Hi Mate, welcome to the SD adventure!

Popping on over run is normal with aftermarket cans. Some people like it! Only thing to check is whether you have a leak in the exhaust - usually at the big join where the single, big bore pipe splits into two, (in front of the rear shock spring). Gasket breaks apart.

If the exhaust is fine then the real cause of the popping is the fuel/air mixture so in all likelihood whoever fitted the Leos did not download a new map to the ECU to compensate. Bike will be running lean and you need to sort this before any damage is done to the engine. There are plenty of maps available here, (£ free), on this site or get a dealer to put on their Akra map which is a bit rich but safe.(£ free if friendly)

Next level is to get a Power Commander PC111, (£100+ on ebay) and then you can download a proper custom map by going to a dyno shop and getting one tailor made for your bike.(£150 -£250) Or, if you have a PC and are confident to try,then you can do all this yourself now by getting a Tune ECUcable, (one just sold on here for $25), and adjusting the ECU in the comfort of your own garage. There are loads of threads here about doing this.

But the real cure to popping is to remove the SAS system. There are threads on here about this. It's a load of pipes and valves and crap that is there primarily to get the bike through emissions legislation. Take it all off before you do any of the above.(Free)

If you are doing all this then you also need to consider taking off the standard airbox when you do the SAS system and replace it with either a Motohooligan or Rotweiller airbox. (£250+) This will add quite a significant power and torque increase to your bike.

If you google search Motohooligan and get to Aaron's website there is a download PDF document explaining all this and a step by step guide to removing SAS and fitting a new airbox.

If you do all the above you will not only have a better bike, it will be smoother on the throttle at low revs, have more power and torque, (Up to 10bhp+), sound way, way, better, look cleaner and be easier to service, and you will have gone on a learning curve about your new bike that will make you appreciate the engine more and understand it better.

And it won't pop on the over run.

Good luck.

Tuneecu works just like a PC and rapid bike so just ask the dyno guy if he's willing to take a look.

You can block the hose coming from the rear of the air box to the electric valve to disable the SAS without using tuneecu and without getting the FI light if you don't have a cable yet. Parts for the cable are only around 25 quid by the way and software is free.

What ARGO said

Don't listen to them. Do it properly!

Guys this might sound weird but I like the popping sound when the throttle is dumped. How do I get it back on my SDR? I have a 2008 SD with fmf cans which I thought run just fine a had sweet popping sound when i dumped the clutch which also helped getting cars out of my way. I just bought an SDR of palmer on here and came installed with a MH airbox, custom mapping with FMF cans however there is no popping (none what so ever). I want my popping back and my flames. Any help? Thanks

Popping on decel is unburnt fuel igniting in the exhaust.
There are two ways to stop it.
1. lower your fuel values on 0-10% throttle (or 20%)
2. Raise the fuel values on 0-10% throttle (or 20%) so the mixture is so rich it will not ignite.
Playing with your custom map at these values should also see you get it back it you want it.

It is my belief that the secondary air system has been decommissioned and if you want after burn in your exhaust header you need to reinstate its use.
If you have the SAS block off plates and other ancillary equipment and or devices to quell such behavior, they will need to be replaced.
You could possibly loosen the exhaust flange and air would find away in and create the desired effect. I too like the pop and gurgle upon deceleration. That said, if It were not there, I would not try to create it.

its cool guys i don't think i will bother. I just figured my issue which is I had the SD before which I loved to death and after selling it I purchased a streetfighter. I sold My SF and thought what I need was an SDR but just realised yesterday that I will never get the thrill I got from the SF in my 2008 SDR. So, i'll leave is as-is, sell it and go for either of these: 2012 Ducati SF, 2014 SDR or 2014 Ducati 1200 monster. Its that instant torque guys, its just too addictive.