Dying/ low idle at stops

tigerstyletroy

tigerstyletroy

First of all before any of this happened i installed new Mivv cans. Bike sounds loud as hell but ran a bit rough. Soooo as a place holder for a proper dyno tune i uploaded the US version of the smooth akra map for 07-08 with Tune ECU. Ran great the first day, as i would expect it to after the new mod, but pretty rich i noticed.

The next day however it started acting up. Riding back from the local cycle gear yesterday with my GF on the back i started to have problems with the bike.I got there completely fine with no issues. Bike was thoroughly warmed up and it was a pretty warm day around 65F. Pull up to leave the parking lot in first gear and as i slow down and engage clutch to stop the bike dies instantly. Starts back up fine, GF gives me a worried look and off we go. Down the hill to the first stoplight. Downshift into first as i slow down and bike instantly dies again while still rolling. After restarting again i notice idle is running a bit low at the light, however it seems to eventually climb back up to normal and has no problem.

Happens several more times on the way home, however starts up each time. Let it sit in the garage for a good hour and a half before heading out for a short night ride. During the night the bike rides just fine, no sign of low idle or bike dying. And so i figure its good to ride to work the next day. Ride it to work for the next 4 days with no problems at all. Today i was going to go hit Bouquet canyon for a quick blast but needed to fuel up first. Bike runs fine all the way to the fuel station about 5 miles away. After fueling i pull out of the gas station and up to the stop sign and the problems start again. Bike dying when slowing down with low idle.

My first thought was the side stand switch was mucking up. So ill start cleaning that up and try to see if the connector is fooked or loose. However i am a bit skeptical because of the low idle problem. I feel like its dying when i come to a stop because the idle dips too low and the bike cuts off. When restarting it runs, while in first with clutch engaged, and in neutral side stand down. Shifts fine into first from a neutral restart but not when slowing down. Dies almost instantly as i engage clutch when rolling to a stop. Like i said im going to start with checking out kickstand switch. Any other ideas or suggestions? Maybe if the sidestand is A-OK ill try reloading OEM map and if all else fails re-install the stock exhaust (please no ). The bike is running quite rich, but i have gathered that it is normal for the Akra map.
No. 47

No. 47

Try the 'unsmoothened' version of the map.
blb

blb

Sounds like its running really lean at low revs, quite common. When my rc8 got hot it ran lean at low revs until I had it custom mapped. Oh and check your clutch switch is working too.

I doubt its your sidestand switch FWIW.
Aphex

Aphex

I would try loading up the stock map, and a reset to see if that solves it. If it does then try the regular akro map or "08_SDGuysCustom_possibly_the_best_map_for_aftermarket_pipes_" (i think its a US map.)

I run the mivvs without baffles, sounds sooo fooking good.
Linga

Linga

If the breather at the back of the tank becomes blocked (ie, you blocked it to stop it leaking when raising the tank or pinched it or the carbon canister has malfunctioned) this will cause exactly what you are describing dieing on low fuel due to vacuum in the tank starving the fuel pump.
Easy to check, just unplug hose and ride while low on fuel.
This has caught me out before.
May not be the problem but easy to check, also going back to the map you had would eliminate the map as a possibility instead of changing the variables again.
tigerstyletroy

tigerstyletroy

Post missing.

Linga

Linga

You should be able to just unplug the pipe at the back of the tank going to the canister...(I think) This may throw a code but will eliminate the canister as the problem.
I to had the same problem, but it was me stupidly blocking it when I lifted the tank to work on the bike.
I didn't unblock it and had the same problems.
On the SDR I had to have a hose going to a 300mm catch can and when the fluid level in the can covered the hose I got an air lock and the same thing happened! When I shortened the hose the problem went away.
Good luck mate and I hope it's the easy fix for ya
No. 47

No. 47

Click reset adaption in TuneECU after reloading/changing map and before 15 min running engine reset.
tigerstyletroy

tigerstyletroy

Okay reloaded the stock map this morning before work. Tried to do the reset adaption in tune ecu but the option was grayed out and would not let me select it. Did not die on the way to work, the idle did seem a little low and had a hard time settling, rpms were constantly bouncing around the 1000-1800 range. So far so good however it could be that the problem simply did not rear its head this morning.
levert

levert

I would have said blocked vent lines(Linga)
Also I have had bad sparkplugs do the same thing.
Also have had bad gas do this twice, from a reputable gas station as well.
tigerstyletroy

tigerstyletroy

Alright so motobox coming hopefully tomorrow. Ill spend the better half of the day pulling out the sas and butterflies and what not. Then its off to a dyno to see if this fixes the issue. Any advice for getting the tank back on solo? Does not seem deformed or bumped but its been on Cali gas its entire life so there might be some bloating. Interesting note, got rid of the carbon canister yesterday and found that it only had one tube attached. The others were broken off? I cannot imagine how that happened as I have not really touched the thing until now...
levert

levert

I just keep the back two bolts attached on the tank and use a tyre iron to line up the front of the tank with the threaded hole.
After a few time doing it you dont even think about it as a problem .
Aphex

Aphex

<deleted because it was redundant, didn't read the whole thread>
TLS_Russ

TLS_Russ

Post missing.

tigerstyletroy

tigerstyletroy

I found on mine when I first got it that the throttle plates were not lifting off idle together when opening the throttle, the front one was moving first, after adjusting the rear (screw and locknut on the linkage) so they both moved together the idle was more steady and stronger, the throttle response much crisper to.....
Might not be your problem but worth checking, every little helps
tigerstyletroy

tigerstyletroy

Currently its in pieces, trying to get the motobox installed before the weekend. Ran into some interesting concerns, the first being my coolant expansion bottle seems to have a load of dirt in it. I would say its filled to the appropriate level considering the markings on the little tank, however half of it is a black dirty muddy substance. At this point a coolant flush was not exactly in the schedule, but now I feel obligated to do so. Ive heard of a little dirt/sand buildup in the bottle but this seems excessive. I suppose i will have to take a look at the repair manual for procedures for this, any specific coolant you guys are extremely happy with?

The front cylinder SAS plate was a freakin nightmare... On a more positive note, Linga, you were correct in your guestimation about a kink in the tank venting line. Should be interesting to see how it runs once ive gotten everything fitted back together.

What map to run?
KTM666

KTM666

Anybody have similar mods that can suggest a temp. map? I am afraid to run stock or the akra maps because of my low idle issue. Will running stock map damage the engine?