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(09-23-2022, 09:43 AM)pdedse_imp Wrote: (09-23-2022, 09:06 AM)Nachodaddy_imp Wrote: Partzilla has the best price on the ECU, so I ordered one from them. I was hoping to find a really cheap used one on Ebay so I could try it and see if it was any better, but it would probably be a waste of money anyway. My problem began after I was riding at very slow speeds practicing figure eights and u-turns in hot weather for 30 or so minutes, and it could be that I fried the ECU. It wouldn't hurt to talk to Don Guhl, too, to see what he thinks. If he can up-date the ECU for a reasonable price, it might help someone else and give him a new venture.
I don't know...there's been about 40 riders just on this forum that had the idle issues and maybe a common denomintor was that it started on a warm to hot day, but other than that, who knows. Seems to me there was simply a batch of ECUs that came out defective. Maybe the robot had a rough weekend and on Monday it just couldn't get it together.
That is quite plausible. A batch with marginal electronics, maybe a simple capacitor that deteriorates after prolonged high temperature exposure is not a profound possibility.
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Hello, I'm Ddumzi.
I'm still sorry for my poor English. But I think I'll have to write it long.
After replacing the new ecm, I drove 2000km for a month, but there are no more problems.
I saw a post in the thread above saying that the ecu number is wrong. I think the part number is different from the members in the United States because I purchased a bike sold inside Japan.
I am a Korean user and I have confirmed directly that the ecu of the bike for domestic use in Japan and the initial part number of the ecu of the product that is officially imported to Korea are the same. After that, I checked that there was an improved product and replaced it. Mr. Don Guhl's reflash has already been done a lot in Korea and many people have solved the problem. However, as I inquired about it, I received a reply saying that I will no longer do bike refreshing. That's why I changed to a new ecu because there was no more way to do it, so there was no change after various maintenance. As you all know about this rpm issue, there was an official letter inside Japan. In other words, due to frequent operation of the clutch, mismatches between ecu and iacv become frequent, causing problems as ecu learns it.
What I still don't understand at this point is that the bike stopped at high temperatures for about 20 minutes, and then when the temperature went down, it was always normal for about five minutes.
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... Honda seems to be having ECU problems across their product line lately, especially 202x model years - but not exclusively. At least they have now acknowledged the problem and are actively fixing those 202x model year issues.
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As you all know about this rpm issue, there was an official letter inside Japan. In other words, due to frequent operation of the clutch, mismatches between ecu and iacv become frequent, causing problems as ecu learns it.
Hello DDUMZI. Thank you for your input to this forum. Can you please clarify concerning the "official letter inside Japan"? Do you have a copy of this letter that you could possibly share with this forum - in English, of course. Also, I'm not sure what frequent operation of the clutch has to do with the high/low idle speed problem, or is this possibly a translation error?
Thanks again.
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... cut back on clutch usage? 
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Interesting because that is when my problem started, but I thought it might be due to operating at very low speeds. I was practicing very low speed U-turns and figure-eights, slipping the clutch and using the rear brake to keep my speed very low in a parking lot near my home pretty much every morning for about 30 minutes before going for a short ride on the roads. Until I started doing this, my bike ran fine. I have never slipped the clutch previously on any of the other bikes I've ridden, but had been watching You Tube videos on making U-turns and slow speed riding and they recommended it. Guess I'll stop just in case.
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Sounds like you made the ecu dizzy  
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(10-09-2022, 10:41 AM)Nachodaddy_imp Wrote: Interesting because that is when my problem started, but I thought it might be due to operating at very low speeds. I was practicing very low speed U-turns and figure-eights, slipping the clutch and using the rear brake to keep my speed very low in a parking lot near my home pretty much every morning for about 30 minutes before going for a short ride on the roads. Until I started doing this, my bike ran fine. I have never slipped the clutch previously on any of the other bikes I've ridden, but had been watching You Tube videos on making U-turns and slow speed riding and they recommended it. Guess I'll stop just in case.
That's interesting Nacho, but my experience was the opposite. I had just finished country roads / hiway riding of 45-70mph, very little clutch usage. Pulled into first gas station off the hiway, filled it, started and the high idle immegiately began, devolved into high / low idle over the next few months. Was a warm day, but nothing crazy hot, maybe low 90s.
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Very interesting. Right before mine started acting up I was stuck behind a long line of cars at a stop sign at the bottom of a bridge, so alot of off the clutch then back on the clutch in a rather tight time frame. Around that same time, I was helping a buddy (new rider) get ready for his Motorcycle Safety class which was also a good amount of clutch work at lower speeds.
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