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Hi Marcel, it was the front cylinder. I tested the cap, it seemed to be working intermittently if that’s possible? Anyway I had another lying around and fixed it. I will change them to ngk soon.
Mar 15, 2025 at 9:23 AM in reply to: Miss and backfire under 5k only after engine warms up – 2009 GT650R #19110Good evening/morning all. Took the bike out for its first ride. It as almost perfect except for the low idle. It sits on 1,000/1,100 at normal temperature.
Mar 13, 2025 at 4:40 AM in reply to: Miss and backfire under 5k only after engine warms up – 2009 GT650R #19104Ok here is something for you. With the tps something is a bit bent where the bolt goes through. Maybe from the heat. I thought I would try turning manually, I will check it with the multimeter. Anyway I slowly turned it up, it started to idle better and rev mostly without a cough. Then I tightened it in that spot. Still getting a slower idle 1,000-1,100. Start it again and still playing up a bit. It must move when tightening because I loosened the bolt move it and running good again. I’ll try and find another tps. I’ll also take some video to show you. I think we are hopefully heading in the right direction 😬
Mar 12, 2025 at 1:28 AM in reply to: Miss and backfire under 5k only after engine warms up – 2009 GT650R #19102Hi Marcel, is there any reason why mine doesn’t throw a code?
Mar 12, 2025 at 12:11 AM in reply to: Miss and backfire under 5k only after engine warms up – 2009 GT650R #19101Mine is efi. When cold it idles perfectly and revs normally/responsive. As it gradually warms up, the revs slowly drop until it gets to 1,000-1,100. That’s when it starts to play up. At least it doesn’t seem to stall now. Sometimes when I rev when the engine warms up, the engine will make like a weird clunky noise. I will check out the tps today as well.
Mar 11, 2025 at 1:24 PM in reply to: Miss and backfire under 5k only after engine warms up – 2009 GT650R #19092Sorry the weird sound I hear seems to be as you rev from idle but not all the time. Would this have something to do with idle problems?
Mar 11, 2025 at 4:55 AM in reply to: Miss and backfire under 5k only after engine warms up – 2009 GT650R #19089This sprag clutch thing. What can it cause if playing up.
Mar 11, 2025 at 4:38 AM in reply to: Miss and backfire under 5k only after engine warms up – 2009 GT650R #19088Have changed the plugs. So everything is new. Starts and runs great, until it warms up. It idles on 1400 until it warms up then 1100. Now the miss or stutter is in between the idle numbers. I did notice what I think Marcel mentioned. It was like clunk a starter makes when dying, except it seems like it was in the engine.
Mar 3, 2025 at 3:55 AM in reply to: Miss and backfire under 5k only after engine warms up – 2009 GT650R #19039I will hopefully get the starter motor before the weekend. The stator and pickup are new electrosport brand, lucky to have 400 klms on them. The front cap was only sparking because I forgot to put the new one in. After I replaced with the new one, it started up and it ran great. I will get some just in case.
Mar 2, 2025 at 5:38 AM in reply to: Miss and backfire under 5k only after engine warms up – 2009 GT650R #19031On the day before I got it going, it was still playing up. Apparently I forgot to change one of the spark plug caps. We saw sparks coming out of front cylinder. It had micro cracks. Put the new one in and started and ran great. Then took it out and it ran great until it started doing the same. This time I ran out of fuel because the gauge is out. Put fuel in to get home and it still played up a bit. I went back over the coils. Back is still 4.8 but the front is 7.6. Rear coil secondary 13.9 Front coil secondary is 15.2. Rear primary 4.8 Front primary 4.8. Front total to front plug is 22.8 front total 18.7. Stator and pick up seem to be good. That’s when the starter motor stuffed up. I don’t know but hoping it was a fuel issue that day. If not it’s a heat thing somewhere?
Mar 1, 2025 at 10:32 PM in reply to: Miss and backfire under 5k only after engine warms up – 2009 GT650R #19030Ok will have a look at the starter motor. The pulse sensor can be changed, unplugged? Also try to get some original Hyosung coils or are mine in spec? I wasn’t sure if my caps would still be ok 3 ohms different between them.
Mar 1, 2025 at 6:10 AM in reply to: Miss and backfire under 5k only after engine warms up – 2009 GT650R #19017Checked the stator again. I’m getting 0.8 on all? There is a red wire and black and white stripe coming from the rectifier I’m getting one number 3.35 on 20k . Is this correct
Mar 1, 2025 at 4:04 AM in reply to: Miss and backfire under 5k only after engine warms up – 2009 GT650R #19016Hi Marcel, would you be able to point me in the right direction for coils? 09 model. What did you think of the numbers for the new ones I showed you that I have? I bought coils, leads and caps. One last question for now. Can the starter solenoid go from working normally, to just clicking? Hey sorry in advance with asking about all of this. It’s seems hard to get help over here.
Mar 1, 2025 at 12:55 AM in reply to: Miss and backfire under 5k only after engine warms up – 2009 GT650R #19015
What do I go by 5/09 or 2010?Feb 28, 2025 at 10:32 PM in reply to: Miss and backfire under 5k only after engine warms up – 2009 GT650R #19012Do I still need 99 sv coils
Feb 28, 2025 at 10:29 PM in reply to: Miss and backfire under 5k only after engine warms up – 2009 GT650R #19011Ok thanks I will check into that. Mine is also a injected model
Feb 28, 2025 at 5:59 AM in reply to: Miss and backfire under 5k only after engine warms up – 2009 GT650R #19005
I found this this morning and the numbers are a lot higher than mineFeb 28, 2025 at 5:48 AM in reply to: Miss and backfire under 5k only after engine warms up – 2009 GT650R #19003Sorry the front cap is 7.6
Feb 28, 2025 at 5:12 AM in reply to: Miss and backfire under 5k only after engine warms up – 2009 GT650R #19002I got the leads off the coils. Both caps are 4.8. If I connect just caps to wires. Back is still 4.8 but the front is 7.6. Rear coil secondary 13.9 Front coil secondary is 15.2. Rear primary 4.5 Front primary 5.2. Please tell me the numbers are out?😬
Feb 28, 2025 at 2:42 AM in reply to: Miss and backfire under 5k only after engine warms up – 2009 GT650R #19001Hi guys, I’ve ordered a new starter solenoid because this one just clicks every time I press the start button. Can the die on the spot, or is it a new gremlin?
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