| Author |
Message |
    
Cryptbueller
| | Posted on Wednesday, July 05, 2006 - 06:20 pm: | 
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I have an 03 XB9S and it doesnt always like to start when it gets hot. When i first pull it out of the garage when its cold, she pops right off no problems. But if I have been riding around for awhile and she gets hot, and i shut it down for a few minutes and then try to restart it starts hard. It always starts but it sounds like its lugging to try and turn the motor over. Has anyone else had this problem and if so give me some pointers on what it possibly could be. |
Jackbequick
| | Posted on Wednesday, July 05, 2006 - 07:47 pm: |
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My M2 was the same way. Almost every time I started it hot it would hesitate a fraction of a second on the first cylinder and then roll through and fire.
If we are talking about the same thing the problem is that the Buell (and all H-D) starters and batteries are not oversized for the work they are trying to do. They are just adequate at best.
When the engine is hot the piston seals better and the cylinder walls are better lubricated so it is harder to force past the piston past compression stroke.
And bad luck and the nature of engines combine to get the engine to usually come to a stop with one piston just short of going over the top. So the starter cannot get a running start on the load.
You can prove this to yourself by stopping the engine, putting the bike into low gear, and then rolling it backward until you can feel the resistance of the compression stroke. Then put it in neutral and hit the starter. In this case the piston will get a running start before it hits the compression stroke.
If you ever have to push start your Buell doing the above first will help. Use 2nd gear and any big people that happen to be around.
Jack |
Pwnzor
| | Posted on Wednesday, July 05, 2006 - 09:03 pm: |
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Use Loc-Tite and torque your battery terminals to spec. |
Djkaplan
| | Posted on Friday, July 07, 2006 - 08:15 pm: |
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Hot starting has been the bane of carburetor engineers for decades, but I'm surprised FI systems still struggle with the same problem.
I can remember being stranded for hours in the woods because I couldn't get an XR500 Honda kickstarted when it was hot. |
Biker_bob
| | Posted on Sunday, July 09, 2006 - 08:21 pm: |
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An old high compression Harley trick is to tap the starter button to put it right on the compression and then start it. Try it. |
Cryptbueller
| | Posted on Monday, July 10, 2006 - 09:36 pm: |
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thanks for the ideas...give em a try next time im out on the bike |
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Starting when bike is hot