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05-11-2012, 12:49 PM
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#1
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Member
Join Date: May 2008
Bikes: 2001 Red Suzuki sv650S
Miles Kms: 18000
Posts: 211
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Loss of accel at highway speeds
Usually when cruising at highway speed I would feel the bike losing power. The rpms stay steady though. It picks up again when I open the throttle. There were a few instances when I accelerated to pass, the bike seem to "sputter" and eventually respond (after giving her a nasty look or stroking the tank gently while whispering sweet nothings).
The problem was intermittent but now the problem seems to become more common. What are the likely causes of this?
__________________
thou art that
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05-11-2012, 04:48 PM
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#2
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Member
Join Date: Dec 2011
Location: Northampton,PA
Bikes: 78 xs 500,01 sv650s
Miles Kms: 23,000 miles
Posts: 124
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Re: Loss of accel at highway speeds
anything done to the bike and have you ever cleaned the carbs
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05-11-2012, 06:42 PM
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#3
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Supporting Member
Join Date: Jun 2010
Location: Teaneck,NJ
Bikes: Triumph T595 Daytona, '01 SVS SOLD
Miles Kms: 7,660 & 22,000
Posts: 6,478
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Re: Loss of accel at highway speeds
Spark plugs, dirty air filter, iffy coil, wire lead, cap and even a CDI ignitor box showing signs of saying good bye.
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05-11-2012, 06:46 PM
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#4
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Site Supporter
Join Date: Jan 2003
Location: Farmington, NH, USA
Bikes: nekid red 99-135k 07VeeStrom1k- 59k
Posts: 10,131
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Re: Loss of accel at highway speeds
also check the sound deadening foam on the underside of the fuel tank, if you can pull it away at all, the airbox inlet is getting restricted when the vacuum is enuf to pull it away from the tank
__________________
RandyO
IBA#9560
A man with a gun is a citizen A man without a gun is a subject
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05-12-2012, 08:26 PM
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#5
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Senior Member
Join Date: Mar 2008
Location: Henniker, NH
Bikes: "99" SV650; "01" SV650; "05" SV650; "02" Speed Triple; "95" SECA" "87" RD250
Miles Kms: 15,000+; 35,000+; 5,780; Who knows
Posts: 259
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Re: Loss of accel at highway speeds
Try some Sea Foam if all others sys check out. Drain tank completely make sure no H2O, fuel filter clog will do those nasty kinds of things.
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Someday... I'm going to drift on tar like I do on dirt
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05-19-2012, 07:48 PM
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#6
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Member
Join Date: May 2008
Bikes: 2001 Red Suzuki sv650S
Miles Kms: 18000
Posts: 211
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Re: Loss of accel at highway speeds
Quote:
Originally Posted by jd4x426
anything done to the bike and have you ever cleaned the carbs
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I synched the carbs and sprayed some carb cleaner directly in the process
__________________
thou art that
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05-19-2012, 07:54 PM
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#7
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Member
Join Date: May 2008
Bikes: 2001 Red Suzuki sv650S
Miles Kms: 18000
Posts: 211
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Re: Loss of accel at highway speeds
Thanks for the tips! I'll go through your list and see what I find.
__________________
thou art that
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05-21-2012, 06:20 AM
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#8
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Member
Join Date: May 2008
Bikes: 2001 Red Suzuki sv650S
Miles Kms: 18000
Posts: 211
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Re: Loss of accel at highway speeds
Quote:
Originally Posted by RandyO
also check the sound deadening foam on the underside of the fuel tank, if you can pull it away at all, the airbox inlet is getting restricted when the vacuum is enuf to pull it away from the tank
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Bingo! There was actually a hole in the foam from constantly being sucked in the air intake. That was a quick fix to a pretty scary problem. Thanks RandyO!
__________________
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