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Old 03-05-2013, 08:56 AM   #496
dirtydeeds
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Location: Calgary, AB, Can
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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.
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Old 03-05-2013, 09:04 AM   #497
Kafn8td
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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?
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Old 03-05-2013, 09:12 AM   #498
dirtydeeds
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I'm referring to the jerky on/off that happens in parking lots. Is this what your talking about as well?
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Old 03-05-2013, 09:18 AM   #499
Kafn8td
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yes. I was expecting it after reading the forums, but I never had the issue.
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Old 03-05-2013, 06:14 PM   #500
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Quote:
Originally Posted by Kafn8td View Post
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.
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Old 03-05-2013, 08:10 PM   #501
dirtydeeds
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Well, I'll have to try to reset the ECU. Thx
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Old 03-06-2013, 06:29 PM   #502
Eukol
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Jerky throttle fix

Quote:
Originally Posted by dirtydeeds View Post
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
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Old 03-07-2013, 05:21 AM   #503
Kafn8td
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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.
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Old 03-07-2013, 05:40 PM   #504
Eukol
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Quote:
Originally Posted by Kafn8td View Post
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?
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Old 03-07-2013, 11:20 PM   #505
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Every one - its a must-have for any SMT owner
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Old 03-10-2013, 12:46 PM   #506
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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
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Old 03-15-2013, 04:54 AM   #507
bart802
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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. ?
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Old 03-15-2013, 05:00 AM   #508
Cortez
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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!

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Old 03-16-2013, 05:49 AM   #509
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Augest? Wow. A lot later than last year. I got mine in May
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Old 03-21-2013, 03:55 PM   #510
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Old thread but cool
http://www.advrider.com/forums/showthread.php?t=696823
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