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OK, the intermittent misfires when hot explains a lot.
I was not disputing the diagnostics, guided by Max, step by step.
My comment "can't figure out why the CPK would open circuit from being parked in the rain" was based upon my experience with cam or crank position sensors failing/beginning to fail due to heat.
An easy test when CPS or CPK is suspect and not yet completely failed, is to apply heat, such as a hair dryer (easy access to nose cone on Sportster) to replicate failing and to then apply cool air to usually restore function.
Now, that we are aware it has been failing for some time, the pieces of the puzzle come together.
You are a good man, Houtman!
zirconxi, did you check stock at hondapartshouse.com or any other on-line sources?
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Hi SportsterDoc, I thought your statement of "can't figure out why the CPK would open circuit from being parked in the rain" is a question. So I try to answer as best as i can. I actually quite welcome any comment or disputing of any kind, it help with the diagnostic and analyse. The more people sharing the their opinion, the better. I did check the hondaparthouse.com, but it seem all their listing is "Ship in 1-3 business day". If like partzilla.com, that would means theres' no stock.
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(02-06-2020, 01:16 PM)zirconxi_imp Wrote: Hi SportsterDoc, I thought your statement of "can't figure out why the CPK would open circuit from being parked in the rain" is a question. So I try to answer as best as i can. I actually quite welcome any comment or disputing of any kind, it help with the diagnostic and analyse. The more people sharing the their opinion, the better. I did check the hondaparthouse.com, but it seem all their listing is "Ship in 1-3 business day". If like partzilla.com, that would means theres' no stock.
If you mentioned that it was mis-firing before it failed, I missed it. That is important in confirming the diagnostics. For a normal functioning CPK to fail overnight in rainy weather did not otherwise compute. Nobody on this forum wants a member to buy a part unnecessarily.
If it ships in 1-3 business days, that is a general indication of in-stock and that the order will process in that time.
Enjoy your 87 F / 31 C 66% humidity weather! It was 27 F / -3 C yesterday morning in central Arizona.
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Hahaha, if only I can ride my CB, i would enjoy the weather. The misfiring I think i didn't actually mention it here. Its actually in another thread i posted sometimes ago but it seems minor, intermittent and hardy noticeable, so I just ignore it. I didn't link it to this problem until now....
I posted it on Sept last year. So I guess the bike had been running with a failing sensor for almost 4 months without any problem. Here's the old post.
http://cb1100forum.com/forum/showthread.php?tid=14807
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Thanks for posting the link regarding the miss. I had not previously seen it, as I checked this forum less and less after "retiring" from motorcycling Sep 2018. I enjoy this friendly forum, but my main interest is helping with issues and there have been few.
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My crank pulse generator/sensor 30300-MGC-003 part had arrived. The new crank sensor have 478 ohms when new compare to my old one which have an open circuit. Will be installing the new part tonight. Riding days ahead, yeehaw....
ps: its actually made in Indonesia, not Japan... But I bought from Japan stockist... Kind of funny how things keep flying around the world just to reach end user...
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Nice work Zirconxi, hope the cover comes off easy, it should be simple to install, make sure the gap is the same so the new part is not damaged on the install, rotate the crankshaft through the hole in the right side cover by hand first to ensure the gap is correct before firing up the engine, you know what i mean.
Thanks for the update.
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Thanks Max for the heads up. My cover was off easily with the help of a small plastic tube. i use it as separator when i screw in from the hole use to turn the crank. as the hole screw going in, it push the tube against the bolt use to hold the crank pulse rotor (the gear thingy with missing tooth), thus pushing the cover out. After sensor replaced, the bike fired up right away with the new crank sensor without any problem. Only issue is I have to redo the installation as I had done the gasket dressing wrong the 1st time (only dress the outer perimeter of screw hole). after i packed everything and then realized the oil might leak thru the screw holes, so i redo the dressing again focusing on inner perimeter of screw hole. Anyway, thanks everyone help for solving my problem. Will start to ride tomorrow once my gasket is cured fully. Problem consider solved...
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I am very happy for you that your bikes problem is sorted out , I think we all learn from this !
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(01-22-2020, 03:14 PM)zirconxi_imp Wrote: Hi all,
3 days back i left my bike park outside in the rain. After the rain stop i rode the bike to fill up some gas and took her for a short 10km ride to dry up. Once home its been parked under roof. Today when i try to fire her up, she give me crank but just wouldn't start. I place my hand over the exhaust and can feel the air pulse. When key turn to on, have the usual fuel pump priming. Could it be bad gasoline or injector clot due to rain water?
Check the battery, note the voltage drop when cranking. The battery may have enough juice to crank but not enough to produce a good fat spark.
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