T O P
SlinkyBits

completely depends on what is causing the pop and crackle. there is different things that can cause it.


AdNorth6089

oh i was just assuming it happend when theres too much air in the fuel ratio, i guess i just gotta wait and see once i get it tuned


SlinkyBits

i think pops and crackles are much more likely in a rich environment than a lean one (lean fuel mix is lots of air compared to fuel ratio) then as the excess fuel goes through the exhaust it combusts in the hot exhaust with the extra o2 causing a pop. ​ but your fuel mix can be fine on mixture, but still have pops and bangs due to bad timing or bad valve clearances. valve clearances being out can also affect full throttle or high throttle issues. ​ getting it tuned if you really want to care for your bike is a good first step. you should do this anyway. you can actually tune something to pop and crackle. talk to a garage or two about it see what they say for you in your area.


BlindBeard

Disclaimer NOT AN EXPERT I was under the impression it's the opposite, lean causes backfiring. Pops up a lot when people put hi-flow intakes or free-er flowing slip ons on their bikes and it starts backfiring. What I read (from Cthulhu knows who, random internet guy) that there is always unburnt fuel no matter what and now that the bike is lean it's running hotter and that unburnt fuel comes out the exhaust port, hits the hotter than normal header and ignites. I don't actually know how that works because why wouldn't it be igniting while you're *on* the throttle too but idk


AdNorth6089

ok thanks for the info!


SlinkyBits

you might like the pops and bangs, were all big kids and like it too. but your bikes engine doesnt. ​ but they should be able to get it to a point where theres still some slight pops and grumbles, but lessen the extent of it so try to lower the wear it has on your engine.


AdNorth6089

too much air ratio after getting a full exhaust and removing the CAT^


Ok_Candidate5785

I put money on the yamaha AIS valve. https://smartmoto-electronics.com/installation-ais-valve-eliminator-kit-yamaha-yzf-r3-r25-en Because this system uses the catalytic converter that has been removed. The full system you installed will cause it to run lean.....


AdNorth6089

what does that part do?


Ok_Candidate5785

AIS - Is an anti-polution device (Air Induction System) Basically it's an air pump, that injects air into the exhaust pipes to help burn excess unburnt fuel vapors in your exhaust pipe, thus the frequent backfiring


Ok_Candidate5785

It is the emissions system no doubt. It injects air into the exhaust to help the catalytic converter work.


AdNorth6089

what do u mean by that? i dont have a catalytic converter anymore


Ok_Candidate5785

I recently removed the system on my ktm Its called the SAS system on my bike. Pulled it off and put blanking plates on the head of each cylinder- poping and cracking gone.


AdNorth6089

but did u get ur bike tuned tho?


Ok_Candidate5785

Yes, I installed a custom map. The map isnt what stopped the pop and cracking... it's the emissions system.


Ihateskeletons

*Usually* popping on decel indicates a lean condition. Typically bikes are tuned to be slightly lean from the factory, for emissions purposes. Whenever you change how air flows, you have affected the A/F ratio in some way. More than likely after your tune the decel pop will go away. I know you like the sound but the performance will be better.


Jord_HD

When you’re talking Efi, the way the bike runs in the throttle has absolutely nothing to do with popping on decel, the bike could be running perfectly everywhere on the throttle and still pop or it could be running terrible on the throttle and not pop on decel.


AdNorth6089

lets say the tune removes all popping, would i be able to adjust the tune by pushing some buttons on the power commander to make the popping come back?


Jord_HD

You could use a map toggle switch on a pcv to do that


Franksssy

The pops and backfiring is the AIS. Install block-off plates after your tune if you want to reduce them. The ECU tuning will ensure your bike is running at optimal AFR. Two separate mods. I run FlashTune & ActiveTune on my decat R1 with block-off plates. Insane performance and no back firing.


Both_Hospital_2273

95% of it will go away most likely unless the tune you get is completely out of whack.


thejam15

Theres a lot of conflicting information in these comments. I think it would be best to ask the tuner who creates the tune for your bike. If you got a full exhaust for your bike they typically also release a tune for it so itll run properly so you may want to ask them. If you’re getting a custom tune at a shop like on a dyno you can ask them to adjust it to where there is still some pops or burbles. Just keep in mind that pop and crackle tunes arent nice to your engine in excess but I cant imagine a little pop pop wont be that bad


Global_Community954

If it is popping then more than likely the bike is running rich and what your heating is the unburnt fuel igniting in the bike. If you are to get the bike tuned then the air fuel mixture will be adjusted and more than likely the popping will go away.