I haven't tried anything on my wee but I bolted a Remus on my BMW F650. It made a lot more noise and vibrated more than stock. The pipe moved the power curve up a bit at the expense of low end power. Not having a dyno handy I couldn't really evaluate except more noise feels faster. Overall I was not happy and went back to stock. That said I see your figures indicate a bit more power at all rpm's above about 5000. If you were looking for a small increase it looks like you've achieved your goal. Whether it would benefit from remapping the fuel and ignition is another issue. How do they say it, "Horsepower costs money, how fast do you want to go??

 

Thanks Wee Willy, between losing the extra weight of the stock pipe and the slight power gain I'm pretty happy. I just start to get nervous when things run lean but I think I'm ok... Cheers.

 

Nice to see they gave you a couple of free runs. And on a good machine including the A/F, smoothing at 5 and an SAE correction factor.
You're under 14 on the A/F so that is indeed good but now you can see how the A/F variables correlate to dips in the Hp/Tq. You could get a PC and have the bikes A/F adjusted on the dyno optimally for another $500-700 to adjust out the dips and maybe add a couple more peak ponies an Tq, but that would be a personal choice as it's not necessaries at this time.
Nice to see some hard data though.

 

Don't know what a nice aftermarket pipe costs but was it worth it for 1.73HP?
I know some pipes can weigh less than the stock stuff but most of us would benefit from loosing the equivalent weight off our guts and asses and the bike would feel faster too.
I bought a Kerker pipe set for my '73 Honda 500/4 because it was cheaper than buying Honda parts to replace the rusted out pipes.
Yeah, it sounded bad ass too.

 

Don't take too much notice of the peak numbers. It's the variance between the before and after which is important. Also a Dynojet dyno will always read higher than an eddy current dyno, which actually loads up the motor with resistance, arather than just spinning a weighted drum.

But your numbers show a healthy engine either way. When I recently had the fuel pump replaced, C&C motorcycle engineering ran it on the dyno to load up the motor and make sure it was just the fuel pump and nothing additional causing the issues and it came up with similar numbers to your bike. Mine is a K8 with almost 40,000klms on it.

What Impressed me, wasn't the peak HP which, like yours, is a little over 50, but it was the torque curve. They make great usable torque +30ft/lbs from 3500 all the way through to just over 9000rpm, where it falls off the cliff. I went for a ride last Monday with a bunch of guys on a variety of bikes, including some current model litre sports bikes equipped with power commanders and pipes. Their triple the amount of HP didn't appear to make them any faster once the bends came into play. I ran mine about 5000-8000rpm in the twisty bits and they couldn't get past unless there was a good 200+ metre long straight. And even then, it would only take a few turns for me to get back past them again. There's something to be said for high wide bars and an upright riding position and usable torque.

 

Actually Dynojet makes inertia drum, loading and Eddie current type models. An Opperator of an inertia drum type can run in SAE CF or STD CF Mode. STD will generally result in higher numbers than SAE.
If you're keeping in line with bikes that have 3x the power, you're simply a better rider than your friends. That's a good thing

 

Thanks all! I was hoping there were some folks on here knowledgeable about dyno tuning. Ozkar, it's good to know she's healthy! I went for another ride on the weekend and really enjoyed the bike.
I made too many changes to really put my finger on any one thing but she's definitely more responsive, sounds fantastic without being obnoxious and the carbon fiber pipe looks pretty sharp. I'm very happy with my results. You can see most of the little stuff I did in the album on my page.

Cheers, B

 

DL650 Dyno run

I got a dyno run at Nor Cal Cycles today. Attached are the results, unfortunately no torque numbers. I paid $10 to get the A/F measured and the dyno tech said it starts running rich over 85MPH. He offered to fix it with a PC, new map, pipes, etc. but 61 peak HP for my stock V-Strom is fine for me and I rarely ride over 85MPH.

 

[resurrecting an old thread. Just got my '09 dl650 last week]
Appears that there's no power increase to rev beyond 9,000 RPM for a stock configuration. While max torque, for stock, looks to be around 6,500 RPM.
This according to user @BadlandsBeta's blue lines, representing the OEM, pre-Akropovic, exhaust installation.