Bike fails does not accelerate well - Stromtrooper Forum : Suzuki V-Strom Motorcycle Forums
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post #1 of 35 Old 11-17-2019, 04:38 AM Thread Starter
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Bike fails does not accelerate well

For about 2 weeks now I noticed that my 2008 VStrom DL650, with 51860km, is not performing well.

It starts well, sound well, idles well.

But as I put into gear and start riding, as I throttle up I notice that from around 2500 rpm it looses power, and the same happens at a slightly higher rpm as I shift up the gears. It struggles to get to 100 km/h.

I'm not sure what could be causing this. Air filter? Fuel? Both?

Periodic maintenance is coming soon but I may need to bring it forward.
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post #2 of 35 Old 11-17-2019, 06:11 AM
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Could be so many things.

Sounds like my bike when I got a bad tank of fuel.

You can find in this site how to test for fuel flow or

It's not that hard to remove the tank and pull the fuel pump.

Look for water and or rubbish in the fuel and the pumps filter.

How old are the spark plugs ?

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post #3 of 35 Old 11-17-2019, 06:53 AM
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The above comments are good, but if you pull the gas tank I'd first check the air filter. This time of year is when mice are building their winter homes and your air box is a great location. A nest will do a pretty good job of restricting air flow, starving the engine from oxygen at higher RPM's.

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post #4 of 35 Old 11-17-2019, 08:12 AM
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Will your bike start without pulling the clutch?

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post #5 of 35 Old 11-17-2019, 08:38 AM
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+2 on Rolex's comments.

However, I would try "Heet" in the gas tank to remove any water first. You might have to run what gas remains out before filling and noticing a big difference.

With water in my tank from winter condensation I noticed some improvement almost immediately, but it took a couple of tanks to get it all out.
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post #6 of 35 Old 11-17-2019, 11:49 AM
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You guys get so many weather related bike problems I'm glad I live down here !!!!

Some of the 19 rides in my shed
2014 V2, Snoopy
2009 Wee, Pumbaa the pig
WR450F, The Blue Postie Bike
YZ250N smoker with rego, Stinky.
Yamaha MT09 (FZ09), The Scud missile.
Club Lead not Club Med.
He with the most toys wins.
Out of my depth in a puddle.
Live life on the edge you will see more that way.
Ridding a motorcycle keeps things in balance.
At the end of each trail and at the end of each day history is made.
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post #7 of 35 Old 11-18-2019, 03:44 AM Thread Starter
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Thanks

I'll pull the pump/filter out to check.

The spark plugs are less than a year old.
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post #8 of 35 Old 11-18-2019, 03:51 AM Thread Starter
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I've already removed the filter which is whasable and resuable and it was quite clogged.

I noticed though that the sponge inside the box was saturated with oil and it was breaking apart and there were bits of it outside the small cubicle that holds it.

Could these have been sucked into the engine/injectors? How do I know if this has happened?
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post #9 of 35 Old 11-18-2019, 03:57 AM Thread Starter
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Thanks for the interest.

The bike only starts if I pull the clutch in.
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post #10 of 35 Old 11-18-2019, 04:00 AM Thread Starter
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I'm not sure condensation is so important in the south of Mozambique.

But water in the fuel is something that I've heard from time to time.

I'll have a look at the pump/filter.

Thanks
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