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Author Topic: RPM drop on start  (Read 2071 times)

Offline F-106

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RPM drop on start
« on: July 02, 2011, 11:32:02 AM »
I rolled the 06 Connie out a few days ago and started her up with the choke on. Bike fired and then the rpm dropped to 1100 form 1800 for a second then went back up to around 2000. the bike has since been doing this every morning since that day. Rest of the day it is fine. I checked the battery and all looks good. However it is coming up on 3 years old. The bike is on the Battery Tender every night and I always have a green light in the morning. I will say I have noticed the bike does not start with the same intensity it one did since the weather got warmer. I don't think this has any thing to do with the problem above but you never know. My 06 has 10,000 miles and is stock. THANKS
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Offline George R. Young

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Re: RPM drop on start
« Reply #1 on: July 02, 2011, 04:16:37 PM »
Spark plug cap and wire corrosion has caused hard starting on my Concours. The symptom was different, it was hard to start after being left for a week. Pretty easy to check, the resistance from plug cap 1 - 4 or 2 - 3 should be around 22 Kohms.
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Offline F-106

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Re: RPM drop on start
« Reply #2 on: July 02, 2011, 04:57:59 PM »
I let the bike sit today till this afternoon. Started the bike without the choke and started fine. The RPM was low due to being cold but started fine. Shut her off and restarted her with the choke and the RPM dropped as I said before. So, this leds me to believe this has to do with starting the motor with the choke on in warm weather even though the motor is dead cold. Due to this being my first summer with the connie I may have stumbled on to a no no for summer starting. Time will tell
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Offline mjrfd99

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Re: RPM drop on start
« Reply #3 on: July 03, 2011, 08:23:45 AM »
Might try a can of Seafoam in a strong concentrate/full can in 1/2 tank of fuel to clean out the carbs
Ran mine to empty and had idle/start issues next tank- added a full can and problems cleared up.
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Offline F-106

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Re: RPM drop on start
« Reply #4 on: July 03, 2011, 01:08:46 PM »
Started her this morning. No choke, she lit off the moment I hit the button no problem. No drop in RPM, I think since it is so warm here {106} that all I need to do is start her with no choke and use the throttle and throttle lock to keep her at 2000 for a small warm up before taking off. I remembered I use this method on my Honda Valkyrie and worked fine.
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Offline timsatx

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Re: RPM drop on start
« Reply #5 on: July 05, 2011, 06:59:47 AM »
Damn, 106° in the morning? That is living in hell. It only gets up to about 98° in the afternoon here and I still use the choke. Just not nearly as long.
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