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Running crappy especially @high rpm
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drnknmnky13's Avatar
 
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Running crappy especially @high rpm - August 11, 2007, 08:57 PM

Man... I just got this bike inspected and legal yesterday. Rode it last night with zero issues.

Started the bike up this morning and everything was fine. Let her idle while putting on my gear. I start hearing her miss a little. Then she dies. Have a heck of a time starting her again. Long story short She idles OK I think (it sounds a little off, but maybe it's just in my head) When you hit about 7k rpms she stutters and doesn't really go. She really bogs down. She does this in neutral as well. Right around the same spot.

I took the carbs out and cleaned them. Didn't notice anything out of the ordinary. Also changed the spark plugs just in case. Old ones looked OK.

Checked for fuel and I'm getting it. Getting spark as well.

Could the a/f ratio just suddenly change?
The bike ran perfect yesterday.

2000 SV. Yoshi pipe. (supposedly the guy I bought it from changed the needles)


I did try searching but it's such a broad topic.

So confused. Any tips or suggestions would be greatly appreciated.

Thanks,

Kris...aka...Drnknmnky13


Then again... That's just me.

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Better or Cheaper, Better
 
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Join Date: March 16, 2007
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August 12, 2007, 08:24 PM

Did you take a look at the fuel filter?


Owners: Gregory & Terra Williams

Hyperbike Performance Centers Land Speed Racing 2007:
Texas Mile: March 182.00 October: TBA
Maxton: March: 194.000 May: TBA September: TBA


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Vondari Suspension Tech
 
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August 12, 2007, 09:05 PM

Sounds like you need to rejet the carbs or adjust them. SV 650 or 1000? I'd be happy to help you out. www.vondari.com or email vondari@gmail.com
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drnknmnky13's Avatar
 
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August 16, 2007, 08:06 PM

OK... well I'm half an idiot.

The problem of it running crappy at about 7k was due to someone not putting the airbox back on after he cleaned the carbs. I just figured I'd test to see if I fixed it before putting the airbox on. So now she has good revs at 7k and up.

BUT... it still doesn't explain my initial problem of dieing than having a heck of a time starting. Yesterday I started her and let he warm up. When I went to ride her she stumbled like she was on one cylinder until about 6k. Then all the sudden... She ran perfect.

Weirdest thing. I think I'm going to take her in to get the carbs synced. And maybe have them put her on the dyno to check the A/F mixture.


I hate issues like this. I'd rather find something broken so I can replace it and feel comfortable with it. Right now she is running but I just don't trust her for any distance.

Vond... if you weren't so far I'd take you up on that offer. I'm in Baltimore... so it's a bit of a hike. And it's a 2000 650.


Then again... That's just me.

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August 16, 2007, 09:07 PM

Glad you got it fixed.
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August 16, 2007, 09:38 PM

Have you checked the diaphragms and springs in the tops of the carbs?


'08 MARRC Expert Racer of the Year
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