"33bhp?" Yes "i dont believe you, I'll seize your bike and take you to court"

Originally Posted by tigersaw

Reading wikipedia, (out of interest, since I saw a TV prog yesterday that showed a racehorse running at 60kph exerts a force of 4 horsepower to overcome air friction), it defines BHP as power at the crank.
So if you measure power at the wheel, you'd have to estimate the losses and bung some onto the figure, or has someone explored this already?

I think they allow for that in the measurements as well as the energy needed to overcome the friction of all the moving parts.
When i used to get my golf on the rolling roads, there was always 2 figures, 1 at the wheels and 1 at the flywheel, the latter being the higher number as that didnt have to overcome all the gubbings of making the wheels turn.

BTW i seen that programme last night, with the plastic horse on top of the landy

Originally Posted by stevegr

If you want a clue note how the Police are reacting.

They are not going we have got you, but coming up with our dyno says you have a few more bhp.

Not this bike is not restricted so you are nicked!

Is it just me, or is this post complete gobbledygook until you add some home-grown punctuation?

Ffs man, if you're going to post something, for the love of whatever deity you worship, make it readable to the masses without them having to reread it 5 times to make any sense of it.

Originally Posted by stevegr

If you want a clue note how the Police are reacting.

They are not going we have got you, but coming up with our dyno says you have a few more bhp.

Not this bike is not restricted so you are nicked!

You may want to research Strict Liability. IANAL so I don't know if it applies in this case or not, but if I was in the OP's position I wouldn't assume it didn't.

[yorkie_chris]

Originally Posted by tigersaw

Reading wikipedia, (out of interest, since I saw a TV prog yesterday that showed a racehorse running at 60kph exerts a force of 4 horsepower to overcome air friction), it defines BHP as power at the crank.
So if you measure power at the wheel, you'd have to estimate the losses and bung some onto the figure, or has someone explored this already?

Who defines BHP as power at the crank?
DVLA website stated "net power" to me "net" means at the wheel, without "correction" for losses.

Originally Posted by stevegr

If you want a clue note how the Police are reacting.

They are not going we have got you, but coming up with our dyno says you have a few more bhp.

Not this bike is not restricted so you are nicked!

Sure that's a clue, rather different from stating it as outright fact.

[yorkie_chris]

Originally Posted by specialone

the latter being the higher number as that didnt have to overcome all the gubbings of making the wheels turn.

You mean it was just the same figure as before, with a complete guesstimate added on.

[Red Herring]

Folks, just got in from work having caught up with developments. The inspector was very understanding of everything I said to him and totally appreciates everybody's point of view, including his officers. Clearly he is working his way through this issue so I would suggest everybody gives him a chance to do just that before offering FB to much more advice. I'm sure FB will update us all once he hears what they propose to do.

On a personal note many thanks for your kind words but all I've done is offer the Forum some of my personal knowledge and helped out someone where I was able to. There are plenty of people on this Forum who offer their help freely and I've been on the receiving end of some cracking advice at times, it's what forums should be all about. Besides you wouldn't believe what a grey area this whole affair has exposed, so we're all going to be winners hopefully....

Originally Posted by yorkie_chris

You mean it was just the same figure as before, with a complete guesstimate added on.

Pretty much i guess, albeit the machines do have some kind of techy calc going on, more techy than i understand.
The guy i used to use did explain it to me once but a lot went over my head tbh
Used to make me laugh tho hearing kids going on about how much horsepower their cars had then you find out it was at the flywheel

Just for info
My Mk2 golf after a gas flowed head and fast road cam had 129BHP at the wheels (something like 140 ish bhp at the flywheel) with 130ft/lbs of torque, went pretty well

RH, you could have stayed out it though or defended the force but you didnt and hopefully like you say we will all benefit in the long term.

[timwilky]

What ever their measured values. A one off test against no recognised procedure is useless. Have they expressed any confidence in the results?

They are stating a one off value. I know statistics has a bad name. But there has to be some repeatability. otherwise how do they know it was not a one off low reading and in fact the bike is totally unrestricted?

At the end of the day. Any decent engineer with an understanding of testing, and presentation of results would wipe the floor of plod and the guy from the local bike shop. The CPS I think would walk away from any prosecution as soon as the defence started asking intelligent questions.

[Red Herring]

Originally Posted by specialone

RH, you could have stayed out it though or defended the force but you didnt and hopefully like you say we will all benefit in the long term.

Yeah right, you've about as much chance of that as YC staying out of a suspension debate!