Had my bike dyno'd the other week.

[mr.anderson]

Originally Posted by ThEGr33k

No offence but I think someone is yanking your chain with that.

Originally Posted by ogden

122? That's 750 power, not 600 power.

Indeed - I was expecting something more like 100. I did it for fun, not to prove anything, so I don't really care at the end of the day.

All I know is the bike is blindingly quick - enough for me anyway - no matter what the actual power output is.

[ogden]

Ultimately, dyno runs are a pointless (if satisfying) way to measure a bike's peak power output. What they are good for is checking fuelling and comparing output before and after changes, but back-to-back runs would have to be done on the same machine, ideally under similar atmospheric conditions, to have any real value.

That said, the ****ant 118 was measured at is enough to have me looking for a litrebike come the spring. It just doesn't feel scary anymore. Only problem is, I can't decide between a C4/C5 10R, K3/K4 gixer thou or maybe a 996/998. Decisions, decisions.

[ogden]

Oh, how lame. The sweary-filter didn't like the word p i s s a n t. It's not even profanity!

Originally Posted by mr.anderson

Indeed - I was expecting something more like 100. I did it for fun, not to prove anything, so I don't really care at the end of the day.

All I know is the bike is blindingly quick - enough for me anyway - no matter what the actual power output is.

Indeed, thats what counts feel.

Originally Posted by ogden

Ultimately, dyno runs are a pointless (if satisfying) way to measure a bike's peak power output. What they are good for is checking fuelling and comparing output before and after changes, but back-to-back runs would have to be done on the same machine, ideally under similar atmospheric conditions, to have any real value.

That said, the ****ant 118 was measured at is enough to have me looking for a litrebike come the spring. It just doesn't feel scary anymore. Only problem is, I can't decide between a C4/C5 10R, K3/K4 gixer thou or maybe a 996/998. Decisions, decisions.

I Dyno'd mine to check fueling and my findings were interesting. Ive chipped it since so after I have the top end checked ill test it again to see how the fueling is now.

If you want italian go RSV

[yorkie_chris]

Yup the gas analyser is useful, just a "power run" needs someone with a very keen eye to tell you much of use from the shape of the curve, and an accurate dyno with not too much smoothing going on.

[G]

They are only really good for setting up, and a before and after modification test to see what diifference they have made.

Originally Posted by northwind

Most dynos can do the "correction" for crank hp, if the operator decides that the owner of the bike would prefer a bigger number. Dishonest dyno numbers are pretty much a matter of fact sadly, if you want an optimistic number then either a) go to the dealer where you bought your bike, b) get it done somewhere that's just charged you money for tuning, or c) get it done somewhere that wants to charge you money for tuning. If you want an honest one, go to a race builder, or someone who couldn't give a rat's ass whether you're happy with the results or not (I use YPE, they come under the "rat's ass" category) But crank figures in general are for marketeers and idiots.

Indeed ... and the figures you will hear quoted by the manufactures are going to be crank HP ... hence why many dynos quite in (estimated) crank HP ...

You therefore need to ask your dyno if it is RWHP or crank figure you have been given ...

Originally Posted by Blue_SV650S

Indeed ... and the figures you will hear quoted by the manufactures are going to be crank HP ... hence why many dynos quite in (estimated) crank HP ...

You therefore need to ask your dyno if it is RWHP or crank figure you have been given ...

When I went I asked if it was RWHP and he looked at me funny and said yes. Obviously he knew what he was talking about because he said crank HP is rollox.

Originally Posted by ThEGr33k

When I went I asked if it was RWHP and he looked at me funny and said yes. Obviously he knew what he was talking about because he said crank HP is rollox.

I see, so you have been to one dyno once and you know it all and what this one dyno guy said is now dogma?!!?

Originally Posted by Blue_SV650S

I see, so you have been to one dyno once and you know it all and what this one dyno guy said is now dogma?!!?

No... I did research into the subject and it turned out he was right. If you want crank HP you need to take a direct drive off of the engines crank and if anything else says its measuring crank HP its a guess.