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Discussion Starter · #1 ·
I have a 2006 SV100S with only 9k miles on it. It has mostly sat for the past 2 years. When it first started to sit 2 years ago, I put Stabil in the tank and put her to bed. Then, last Spring I rode her around the block a few times, drained the gas, refilled with Stabil, and did an oil change. Then, she sat again with the trickle charger on.

Now, I just took her out of her slumber again and drained the gas. I've now put some miles on her and I'm having a problem. Everything is fine for the first 15-20 minutes until the bike warms up to about 185F and then the bike loses all power. I can accelerate off of the line, but I get to about 25mph and 5k RPMs and then the bike revs without any power. I thought it must be a fuel problem. So, I put some Seafoam in the tank and rode it another 25 miles. No change. So, I then drained the tank again and put fresh 91 octane in (I usually use 87). Still, no change. There are no error codes on the bike.

I'm now left wondering if this is a fuel system problem, a clutch problem, or maybe a spark problem (all 3 possible types). Before I start to tear this bike down, I thought I'd ask the wisdom of the group if there are any easy things to check for or diagnose? Too much oil? Oil type not compatible with wet clutch? I usually use Valvoline 10W-40, but I can't confirm or deny that's what I used unfortunately.

Any help would be greatly appreciated!
 

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Discussion Starter · #2 ·
I went ahead and changed the oil with fresh Valvoline 10W-40 Motorcycle oil. This seemed to fix everything for a little longer than before. Instead of 10-15 minutes of running smoothly, it lasted about 25 minutes before I noticed this same behavior. Looking down when it first happened the engine temp was 208F.

So, now I'm guessing that car oil was incorrectly put in last year. Only about 20 total miles were put on since the last oil change. I would have thought replacing it would have fixed it completely, but there are still lingering issues. So, either I damaged the clutch, or the car oil additives need time to wear off, or something else is wrong. Any thoughts?
 

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Welcome to the forum! Keep on riding it and use plain old 87 octane. Sometimes it takes a couple of tanks to see results after a bike has sat for a long time. If it shifts well in lower gears, I doubt the clutch plates are the issue. I had a similar issue with my '06 SV1000S that I bought used a couple of years ago and it was because I was using too high octane gas: https://www.sv-portal.com/forums/4-sv1000-discussion/72187-holy-crap-sv1000-number-4-me.html (post #14 is where I started having issues, post #38 the problem returned, and post #42 I resolved the problem)

Another thing to try is to clip a few mm off the spark plug wire where it fits into the cap on top of the spark plug. It exposes new copper wires and has helped a lot of guys on the forum over the years with high RPM running issues. Simply twist and pull the wire out of the top of the cap and snip 2-3 mm off the wire then just push and twist the wire back in.

Also check your flywheel magnets to make sure none have slipped out of position. It's unfortunately a very common problem on our SVs. Loose/destroyed magnets likely wouldn't cause the problems you are having though.

Good luck getting it sorted and throw up some pics when you get the chance. We always like to see other members' SV1000s. :supsmiley:
 

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Discussion Starter · #4 ·
Thanks for the thread link. There's a lot of good stuff in there.

This is actually the first time I've ever put 91 octane in there. I thought it might help with the Seafoam to clean things up. I'll check the spark plugs, but is this something that sitting would really hurt? I probably wrongly assumed that only physical movement or the firing of the plugs would hurt them.

I've never experienced clutch slippage before (at least that I know of), but from the threads on this site this sounds like what's happening to me. I keep coming back to the oil. I put 3 quarts of fresh oil in yesterday, but I didn't change the filter since it had about 30 miles of use on it. I know some oil sits in the filter at rest, but could this amount of oil be causing the clutch to slip?
 

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Have you flushed the clutch fluid and replaced with new fluid? Old fluid that has absorbed moisture can cause shifting issues.
 

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Disturbed, very...
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When you say that it revs past 5k but without power, do you mean it just slowly speeds up, or the engine revs without the bike going quicker ? The second is what i am assuming you mean.....

If it is just revving its head off without an increase in speed, i would say that the clutch hub is frozen, meaning the slipper portion isn't "clamping" like it should under power, it is remaining in the
"slip, or back torque limiting stage....."

A dodgy clutch will slip at 5-6k from any excess vibes too..... the springs on the clutches are so weak it doesn't take much....

You could get the bike on a rear stand, and put it in gear and grab the back wheel and give it a good hard turn back and forth, i mean really hard.
Without the engine running it may shock the hub loose..... Yeah, i know it sounds like a long shot, but anyhting is worth a try....
 
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