The big KTM 990 SMT thread -- riders check in w/ photo! - Page 34

dirtydeeds · 03-05-2013, 08:56 AM

I like the smoother part. I dislike city riding as it is, smoother will help. That's one thing that was not exaggerated about the bike. Engine manners at lower RPMs/speeds are bad.

Kafn8td · 03-05-2013, 09:04 AM

I never noticed any low throttle issues. I did have a starting issue when I first got it. It was like the choke wasn't coming on. I fixed that with the 15 min idle reset. Have you tried that?

dirtydeeds · 03-05-2013, 09:12 AM

I'm referring to the jerky on/off that happens in parking lots. Is this what your talking about as well?

Kafn8td · 03-05-2013, 09:18 AM

yes. I was expecting it after reading the forums, but I never had the issue.

Pork-Chop Express · 03-05-2013, 06:14 PM

Quote:

Originally Posted by Kafn8td

yes. I was expecting it after reading the forums, but I never had the issue.

I never noticed the jerky throttle thing either on the demo day when I got to ride an SMT. We even turned around in a parking lot to make the return trip to the dealer and the bike remained very smooth even at crawling slow speed. I still preferred the power delivery, riding position, stiffer suspension, and lack of wind buffeting on the Super Duke to the SMT but there's no denying the SMT is a very nice, very smooth light touring machine.

dirtydeeds · 03-05-2013, 08:10 PM

Well, I'll have to try to reset the ECU. Thx

Eukol · 03-06-2013, 06:29 PM

Quote:

Originally Posted by dirtydeeds

Well, I'll have to try to reset the ECU. Thx

Hi, I had the same trouble with my bike (Yam XTX660). Same deal, where some bikes were affected more than others (or riders' care levels?).

It was explained to me that it is an issue of closed loop vs open loop fuel mapping by the ECU. 'Closed loop' is active on low-load, steady throttle openings, and 'open loop' comes into effect on hard acceleration and high load (freeway cruising/hills).

Manufacturers manage to get through emissions testing mainly on closed loop - steady throttle and little loading (no hills or wind resistance - as it's sitting on a dyno). The result is that the closed loop map is leaned right off and the open loop can be much richer as it's (largely) avoided during emissions testing.

The 'jerk' happens when you're negotiating car-parks, roundabout etc - because you're adjusting the throttle alot and the weight of the bike is 'falling' onto the chain/engine and then unweighting (unloading) the chain/engine - because you're in low gear, the engine/ECU feels this loading/unloading greatly (think about ratios and amount of engine braking) .... the net effect is: closed loop ... open loop ... closed loop ... open loop ... closed loop ... open loop (lean ... rich ...lean ... rich ...lean ... rich). A piggyback ECU (dynajet etc) won't get rid of this as they only effect the open loop mapping - unless of course you lean that off too (?!) but that will lean off the bike's performance.

The 'fix' is richening up the closed loop. We (www.xt660.com) experimented with all sort of settings and adjustments. It was one member though who came up with most of the performance improvements - in the end Kevin came up with an electronic solution to rich up only the closed loop - which could be used with or without a dynejet etc. It was an amazing difference and I can now go around a roundabout very smoothly (lots of them in Australia). Dynajet eventually made a similar product for the XT660 - but at 2.5x the price. He supplied the units to us at a very fair price - all professionally enclosed and wired with the correct connections for the loom.

When yamaha stopped importing the XTX660 into Aus, Kevin made the change to a KTM990SMR - I follow him a bit on his forum (www.ktmsmt.com) because I'm thinking of doing the 990SMT next. From what I gather, he is using the same principle to address the problem on KTM 990s, and supplying a similar product for the users on the forum (hopefully still doing it). He used to supply the wiring schematic on early version gizmos, but got burnt with people taking his IP, making the devices and selling them on eBay etc, so I respect his stance on supplying the gizmo only.

Join up and look him up there (www.ktmsmt.com username: kevxtx) and tell him 'Hello' from Eukol. He also (as he did with our bikes) has a complete modification encyclopaedia on offer outlining all the (mostly performance) mods he's come up with (extra cooling fan, airbox mods etc) for the keen DIYers. Happy to do this for him - I don't know him outside of the XT660 forum, but respect what and how he does - he always had time and interest to answer questions - top bloke

Kafn8td · 03-07-2013, 05:21 AM

Kevin is awesome! There is no gizmo however for the SMT. He is using tune ECU and a PC V to address the issue. With tune ECU we can share tunes as they are created either through a Autotune 300 or on a Dyno.

Like I said earlier, my bike never had a snatchy throttle, although it was very difficult to start. With Leo Vince's, CPR air box, SAS blocked off and secondary flies and actuator rods removed, it is like a different motor.

Eukol · 03-07-2013, 05:40 PM

Quote:

Originally Posted by Kafn8td

Kevin is awesome! There is no gizmo however for the SMT. He is using tune ECU and a PC V to address the issue. With tune ECU we can share tunes as they are created either through a Autotune 300 or on a Dyno.

Like I said earlier, my bike never had a snatchy throttle, although it was very difficult to start. With Leo Vince's, CPR air box, SAS blocked off and secondary flies and actuator rods removed, it is like a different motor.

They all in Kev's KTM990 'pedia?

Scutty · 03-07-2013, 11:20 PM

Every one - its a must-have for any SMT owner

prooney377 · 03-10-2013, 12:46 PM

Quote:

Originally Posted by Podman

How did you get all the sheep to pose for the picture

I thought they were clouds that had fallen from the sky. Took some video on the day too.

http://www.youtube.com/watch?v=-fHUi03FwCk

bart802 · 03-15-2013, 04:54 AM

I have a 2013 SMT on order. Good thing I have my DR650 to ride while I wait for it ! Has anyone heard when they might show up here in the U.S. ?

Cortez · 03-15-2013, 05:00 AM

Quote:

Originally Posted by bart802

I have a 2013 SMT on order. Good thing I have my DR650 to ride while I wait for it ! Has anyone heard when they might show up here in the U.S. ?

Yeah!
Late August!

MIghty · 03-16-2013, 05:49 AM

Augest? Wow. A lot later than last year. I got mine in May

goodcat8 · 03-21-2013, 03:55 PM

Old thread but cool
http://www.advrider.com/forums/showthread.php?t=696823

03-07-2013, 11:20 PM	#505
Scutty Adventurer Joined: Jul 2011 Oddometer: 43	Every one - its a must-have for any SMT owner __________________ My bike anthology: Yamaha XT600E, KTM 990 SM-T, Ducati Diavel, Kawasaki Z1000, Suzuki SV1000, Kawasaki Zx7-R, Honda VFR800, Honda CBR600F, Yamaha RD350, Yamaha DT175, Honda CM125, Kawasaki AR125, Kawasaki AE50 - wow I have owned a lot of bikes

03-15-2013, 04:54 AM	#507
bart802 Adventurer Joined: Mar 2010 Location: Michigan Oddometer: 35	I have a 2013 SMT on order. Good thing I have my DR650 to ride while I wait for it ! Has anyone heard when they might show up here in the U.S. ? __________________ Motorcycles , Much enjoyment in my life for over 40 years 2013 KTM SMT 990 2009 Suzuki DR 650 gone -99 zrx1100, 08 ST 1050,03 cr250r, 03 sv1000, 05 ultra and about 22 others

03-16-2013, 05:49 AM	#509
MIghty Adventurer Joined: Jan 2012 Location: South Jersey Oddometer: 73	Augest? Wow. A lot later than last year. I got mine in May __________________ 2012 KTM 990 SMT http://www.ktmsmt.com/ 2002 DRZ 400 (gone)

03-21-2013, 03:55 PM	#510
goodcat8 I can pass this guy..... Joined: Feb 2008 Location: Los Angeles Oddometer: 2,737	Old thread but cool http://www.advrider.com/forums/showthread.php?t=696823 __________________ 2012 Triumph Bonneville 2006 Suzuki Vstrom Prior: 3rd Battalion - 6th Marines - 2nd Marine Division - Lima Company - 2nd Platoon - 0311

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: .
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

03-05-2013, 08:56 AM	#496
dirtydeeds I'm alive. Joined: Jul 2004 Location: Red Deer, AB, Can Oddometer: 1,811	I like the smoother part. I dislike city riding as it is, smoother will help. That's one thing that was not exaggerated about the bike. Engine manners at lower RPMs/speeds are bad.

03-05-2013, 09:04 AM	#497
Kafn8td Adventurer Joined: May 2012 Oddometer: 61	I never noticed any low throttle issues. I did have a starting issue when I first got it. It was like the choke wasn't coming on. I fixed that with the 15 min idle reset. Have you tried that?

03-05-2013, 09:12 AM	#498
dirtydeeds I'm alive. Joined: Jul 2004 Location: Red Deer, AB, Can Oddometer: 1,811	I'm referring to the jerky on/off that happens in parking lots. Is this what your talking about as well?

03-05-2013, 09:18 AM	#499
Kafn8td Adventurer Joined: May 2012 Oddometer: 61	yes. I was expecting it after reading the forums, but I never had the issue.

03-05-2013, 08:10 PM	#501
dirtydeeds I'm alive. Joined: Jul 2004 Location: Red Deer, AB, Can Oddometer: 1,811	Well, I'll have to try to reset the ECU. Thx

03-07-2013, 05:21 AM	#503
Kafn8td Adventurer Joined: May 2012 Oddometer: 61	Kevin is awesome! There is no gizmo however for the SMT. He is using tune ECU and a PC V to address the issue. With tune ECU we can share tunes as they are created either through a Autotune 300 or on a Dyno. Like I said earlier, my bike never had a snatchy throttle, although it was very difficult to start. With Leo Vince's, CPR air box, SAS blocked off and secondary flies and actuator rods removed, it is like a different motor.