Dyno Result - SV650.org

11-02-06, 05:05 PM

Just had my stock K5 dyno'd at 9500 miles and got 71.9 bhp, 46 lb/ft (ft/lb?) torque. Is this the first case of a Japanese manufacturer claiming performance below the actual? Can't wait till the full system and filter goes on.

11-02-06, 05:16 PM

It could be, but more likely is that the variation between dyno operators and the dynos themselves can produce enormous differences.

11-02-06, 05:27 PM

Quote:

Originally Posted by andyaikido

Just had my stock K5 dyno'd at 9500 miles and got 71.9 bhp, 46 lb/ft (ft/lb?) torque. Is this the first case of a Japanese manufacturer claiming performance below the actual? Can't wait till the full system and filter goes on.

That figure is way too high for a stock K5.

We are only seeing those sort of numbers of MiniTwins race bike with full M4 systems, K&N filters, etc. Even then only a handful of bikes are that powerful.

11-02-06, 05:34 PM

must be a very optimistic dyno then.

Viney · 13-02-06, 09:55 AM

Quote:

Originally Posted by andyaikido

Just had my stock K5 dyno'd at 9500 miles and got 71.9 bhp, 46 lb/ft (ft/lb?) torque. Is this the first case of a Japanese manufacturer claiming performance below the actual? Can't wait till the full system and filter goes on.

at the wheel or crank?

13-02-06, 11:57 PM

Quote:

Originally Posted by Carsick

It could be, but more likely is that the variation between dyno operators and the dynos themselves can produce enormous differences.

Also ambient temperture and altitude all come into the equation. I'm guessing we're talking stock motorcycles here. If not you can throw in a few more variables like.
engine state of tune
aftermarket vs stock exhaust efficiency
aftermarket air filter vs stock efficiency
condition of spark plugs
fuel octane used
Well anyway, a whole lot of stuff can make a difference to the final result.
Cheers!

14-02-06, 09:06 AM

Quote:

Originally Posted by a1a

Quote:

Originally Posted by Carsick

It could be, but more likely is that the variation between dyno operators and the dynos themselves can produce enormous differences.

Also ambient temperture and altitude all come into the equation. I'm guessing we're talking stock motorcycles here. If not you can throw in a few more variables like.
engine state of tune
aftermarket vs stock exhaust efficiency
aftermarket air filter vs stock efficiency
condition of spark plugs
fuel octane used
Well anyway, a whole lot of stuff can make a difference to the final result.
Cheers!

You forgot the big one, temperature of the bike engine at the time of testing!

jambo · 14-02-06, 11:35 AM

Engines loosen up with milage as well, so after a few thousand miles the motor's probably fit and healthy now, though I'd go with the others here and say optimistic Dyno.

14-02-06, 11:15 PM

That used to be the case, nowadays most jap stuff seems to loose a bit of power as the miles get put on, On the GSXR's etc it seems to be for proddy racing so there good out of the crate.

Have seen a GSXR1000 track only bike loose 10hp over the course of a year, well maintained, ridden hard but not abused, just lost power as the miles went up

11-02-06, 05:05 PM	#1
andyaikido Guest Posts: n/a	Dyno Result Just had my stock K5 dyno'd at 9500 miles and got 71.9 bhp, 46 lb/ft (ft/lb?) torque. Is this the first case of a Japanese manufacturer claiming performance below the actual? Can't wait till the full system and filter goes on.

14-02-06, 11:35 AM	#8
jambo Member Mega Poster Join Date: Aug 2003 Location: Croydonia Posts: 5,376	Engines loosen up with milage as well, so after a few thousand miles the motor's probably fit and healthy now, though I'd go with the others here and say optimistic Dyno. __________________ Modern motorcycles are bloody brilliant, enjoy it while we can

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11-02-06, 05:16 PM	#2
Carsick Guest Posts: n/a	It could be, but more likely is that the variation between dyno operators and the dynos themselves can produce enormous differences.

11-02-06, 05:34 PM	#4
andyaikido Guest Posts: n/a	must be a very optimistic dyno then.

14-02-06, 11:15 PM	#9
Robw#70 Guest Posts: n/a	That used to be the case, nowadays most jap stuff seems to loose a bit of power as the miles get put on, On the GSXR's etc it seems to be for proddy racing so there good out of the crate. Have seen a GSXR1000 track only bike loose 10hp over the course of a year, well maintained, ridden hard but not abused, just lost power as the miles went up