2017 KTM 350XC-F Hard Starting

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6/2/2017 6:43 PM

Periodically our 350 XC-F won't start - periodically. We checked the battery, good, fuse good, good clutch, good electrical connections and grounding, Bendix good, etc. We were at a National Offroad Event at talked tot he mechanics for the KTM team. They were nice enough to allow us to bring the bike into the big rig and they commenced to work on our problem...they pulled the clutch to check it (hence checked good) but had to use a clutch holder to rotate the crank. With a little effort it finally turned freely. With the free rotation they pushed the estart and it turned over laying on it's side. The clutch was put back in and the cover on. Once upright it would not turn over. Puzzled another mechanic said to rock the bike backwards. We did that and hit the estart - it started right up. Everyone was in awe but no clear suggestions on a final fix. So now that is the routine when you push the starter and nothing happens. Rock it then push the starter and it starts. I have heard of one other brand that this has happened to and the was on a Kawasaki 450.

Suggestions???

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My bikes: '73 Honda SL70, '74 Suzuki TM75, '75 Honda CR125, '76 Honda CR125, '76 Suzuki RM100, '76 Honda XR75, '77 Suzuki RM125, '79 Maico Magnum 250, '80 Maico MC 250, '79 Maico Magnum 400, '85 Kawasaki KX250, '93 Honda XR250R, '94 Honda CR250, '01 KTM 300EXC, '04 KTM 300 EXC, '05 KTM 300 EXC, '06 KTM 300 XCW, '08 KTM 300 XCW

6/2/2017 8:11 PM

Have you checked the voltage on the battery? Just a shot in the dark but maybe you got a bad battery or something.

I've got a 14' 450 and I ended up buying a throttle position sensor tool and setting it to the recommended range and my bike starts up like a charm every time.

If you talked to the legit KTM mechanics and they were puzzled good luck finding the answer here lol.

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10' 200 XC-w
96' XR600r

6/2/2017 8:27 PM

Could be the one-way bearing not disengaging correctly behind the flywheel. My friends did something similar. His would turn over and sound like it wanted to start...but the bearing would not disengage and allow the engine to turn free.

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Tomac and/or Anderson for 2020.....

6/3/2017 11:04 PM

Check your battery ground strap for dirt and rust. It will make a difference if either dirty or rusty.

Paw Paw

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6/21/2017 6:02 PM

Problem resolved! Doing a little digging, the one way bearing checked good so moving up the gears we looking at possibly the torque converter which led me to the starter. Here is the routine, when the start button was pushed it would run fine, pushed again - fine, again, fine, then stuck -click, click, click. I took the starter apart and look at the images. It was obvious why the bike was staring hard but the sticking? That turned out to be the broken wire of the armature stopping in between the magnets and it stopped the starter from turning over. It also was shorting to ground which was draining the battery constantly. The split? I put a new starter on this afternoon and the bike starts every time and in about 1 sec. No more holding the e-start and hoping...thanks for your help....

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My bikes: '73 Honda SL70, '74 Suzuki TM75, '75 Honda CR125, '76 Honda CR125, '76 Suzuki RM100, '76 Honda XR75, '77 Suzuki RM125, '79 Maico Magnum 250, '80 Maico MC 250, '79 Maico Magnum 400, '85 Kawasaki KX250, '93 Honda XR250R, '94 Honda CR250, '01 KTM 300EXC, '04 KTM 300 EXC, '05 KTM 300 EXC, '06 KTM 300 XCW, '08 KTM 300 XCW

6/21/2017 7:20 PM

Good find, stuff like that can drive you crazy.

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Tomac and/or Anderson for 2020.....