The Yamaha Road Star Warrior Forum

The numbers I got we far less than those I have been reading about.[xx(]

Mods:
Samson Street Sweepers with Baffles
Barons BAK
AIS
PCIII USB custom map on dyno
Motor is stock.

9000 miles, moderate break in, running synth since 5000 miles.
Fuel: low Octane

Results:
Max HP = 65
Max Torque = 92
I will attempt to attach the files so you can see the curves.

My thoughts are: (1) is that the dyno is not calibrated, although this guy does have a good history with performance work and the machine is 6 months old, (2)My rings did not seat, I will do a dry and wet compression test soon, (3) bad PCIII USB.

The bikes pull seams to be the same before and after I had the custom map done. I have never run it against another stock RSW to see if there is anything wrong, but it does pull hard, but not hard enough to lift the front.

Comments anyone?

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Street Sweepers are not know for adding HP or torque. The Barons BAK won't add as much as the PR or the VBAK. AIS doesn't do anything for the numbers. Octane is fine. Most pull too hard to get the front up, They just spin. You need lots of weight over the rear tire in order to pull the front up.
The curves really look bad. Do that compression test and let us know the results. Moderate break-in might have something to do with it but it shouldn't do that much. Might be the dyno is off.

The street sweepers probably killed your power, but I'm going off what many others have said. As OldMan said, the other BAKs will produce better numbers, but they are more noticeable in the mid to higher RPMs moreso than in the lower. I'd also agree that the curves look a bit unstable but that could be the person doing the dyno not reving it up steadily (mine looked a bit jumpy at lower RPMs only because he was not holding it steady.) Did you change out your plugs prior to having the map done? (This is not to open the argument up on which plugs are better, but new plugs will perform better than plugs that have been running rich for 4000-9000 miles. That may explain the unsteady curves.

seems low to me on the hp

I would thik it's the street sweepers. Put on a V&H propipe for BEST performance!!!

Don't forget that every dyno is different some ,some just read lower than others, mostly depending on conditions, the biggest being weather (although the SAE correction should minimize this) , elevation and dyno operator technique.

To get real numbers that you can see if your bike made any gains (or losses) it is imperative to make dyno runs both before and after the mods, most will agree that stock Warriors will usually make between 72-80 hp on a decent day at around sea level. Obviously your bike is already modded, so it's too late for that, but if you are really worried you could try and find someone with a stock bike and ask them to have it tested, I know this is far from perfect since every bike is different but it'll give you at least an idea if this dyno reads low and how much off the norm it actually is.

That all being said, nobody that I have ever seen with Samsons on their bike actually gained any power over stock and like you losing power seems almost the norm.

The most proven pipes on this board are V&H's Pro-pipe and Bigshots, you won't be making a mistake putting either of these pipes on (or you could try the Muzzy it will make as good or better power than the Pro-pipe) if you want to get a little air under your tire. Don't forget you will have to at least upload a map into your PC3 for th epipe you put on or better yet have another map made.

Or keep your pipe, it does look great, and keep on riding....just don't go messin' with any VTX's...lol

My first dyno run two years ago with the exact same setup produced 72hp and 99 pounds at around 95 degrees and very high humidity (it was in August I think). I would say definitely the guy or the dyno.

I've not had any experience with the PCIII yet, but everyone I've talked to or read about said there was a noticeable difference in the way the bike ran with the PCIII and dyno tune.

I see your note saying the rpm's aren't exact. From the looks of it they're not even close. You're torque peak ought to be somewhere in the 3,000 range, and the crossover at 5,200.

yea what warbird said..... it could be the guy didn't have the correct hookup to the tach..... good luck though.

Ask the dyno shop to give you a floppy with your runs on it and then you can download the viewer from Dynojet.com and get the rpms back on the right axis.

It looks like the scales are wrong on both the X and the Y axis, if the Y-axis lines were closer together so that your RPM's were accurate, and the X-axis lines were closer together, your numbers might be more like what you were expecting. In other words, (like Warbird was saying), the numbers he wrote down to indicate RPMs are way off.

I know you all are saying it is the street sweepers, but that is low even for them. You may make a gain over stock with the street sweepers and other mods you have, but just not as great as some other pipes. Torque may be suffered...

I would say it was the dyno, or the person opperating it...

I just got my bike done yesterday I have an 02 warrior with home made bak with 2 k&n's clamped to the throttle bodies,ais block off, Pc3 usb,pro pipe,every thing else is stock.standard hp max 89.0 standard torque was 106.5. It was running lean on the first few run's 89.3hp and 108.9 torque but the torque curve was pretty flat after they dialed the pc 3 in the torque curve went through the roof,the torque is what you feel in the booty. I'am happy.

Don't sweat the rpms they are not off, they just are not on the chart, and just because the guy who made the sheet chose to show mph doesn't mean he did anything wrong...get the floppy and if you need to e-mail me the file and I will print you up a dyno sheet.

For over two years I have told everyone that samson pipes SUCK!!
They are pretty but have the great abililty to rob hp, And boy did that happen to you. Get the pro pipe or the bigshots. I got 6 more hp over the stock 75 hp with the pc-111 and the air kit I got 86hp
and 105lbs of torque. Get rid of them the only thing they are good for
is wall decorations!!!!!!