Amps still shit after 8 years.

[Gremlin]

Just buy a more powerful bike ..... that way the crank etc is designed for the power

cfwb is not talking about sticking a turbo on the bike, making whacking great power etc. The improvements are relatively small in the HP numbers, but it's not really about the HP. It's about making the standard bike better... argh, hard to describe better as cfwb has already stated it, and you seemed to have missed it.

The "more powerful bike" will have the same issues with holes in curve, fueling not being spot on for NZ conditions and fuel etc.

[Crasherfromwayback]

.

Correct. Any bike is way nicer to ride with the dips and troughs in the torque curve gone. But he's obviously anti/better than a dyno, so good luck to him.

[The Pastor]

What ya fitting ya pumper too ? Lot fitted to XR650's and heap of info on net to by pass the dyno, Mr google should have something on what you fitting it to ....

thinking about buying one of these

http://www.kjsmotorcycleworks.com/kjs_manifold.htm

seems pretty legit, and MIGHT just go out of the box (as i have an american spec bike) but i doubt it will :P

[The Pastor]

Just buy a more powerful bike ..... that way the crank etc is designed for the power

now wheres the fun in that?

[brp]

Full on bit of kit

"The fun is in riding your stead not pissing about in your garage"

If ya buy a NZ new bike it should be sent from Japan for our fuel etc


Wee ricers been making bikes longer than the age of most using the Dyno

Do you think they spend millions in development but forget doing the last wee bit that "johnny at tommies yamaha" is trying to achieve
on his dyno ? Sure ya can get more horsepower, torque curve - but at what expense to longevity, reliability etc

[Crasherfromwayback]

If ya buy a NZ new bike it should be sent from Japan for our fuel etc


Wee ricers been making bikes longer than the age of most using the Dyno

Do you think they spend millions in development but forget doing the last wee bit that "johnny at tommies yamaha" is trying to achieve
on his dyno ? Sure ya can get more horsepower, torque curve - but at what expense to longevity, reliability etc

They all come as lean as fuck to get through emmission laws mate. Running lean ain't that good for longevity.

[brp]

Vast majority of new bike buyers their bikes never see a dyno but still achieve big miles

[Crasherfromwayback]

Vast majority of new bike buyers their bikes never see a dyno but still achieve big miles

You're 100% correct. Dyno's are a complete waste of time and money. Wonder why the factories use 'em.

[Headbanger]

They all come as lean as fuck to get through emmission laws mate. Running lean ain't that good for longevity.

Is that to say my bike needs to be retuned?

[pritch]

Full on bit of kit

If ya buy a NZ new bike it should be sent from Japan for our fuel etc

It's not that simple. Part of the problem is caused by the way the emissions testing is done. There often tends to be a dip around the rev range where the testing is done so as to get good readings.

Not all bikes of any model are exactly equal, or are used the same, are at the same altitude, or the same temperature, but there is only one standard EFI setting. If you require completely new settings (eg aftermarket cans) that's where the Power Commanders come in.
Even without mods a custom map can result in a much nicer ride. Mine certainly did.

Some bikes, like most of the current Triumphs, have adaptive EFI and will modify their own settings within reason. You can still change the standard maps if you do major mods, but the bike can adapt to minor variations on its own. Or owners can assist with the "12 minute tune up".

[Big Dave]

Horses - courses. High performance modern bike with electronic everything - modifications too. Yep - Dyno it for optimum tune.

We're talking about a resurrected Virago.

And yes Gareth - I do believe that if you put an old, tired bike under the maximum loads that a dyno exerts - something could easily break.

They call it being sympathetic to the machine - or not.

[brp]

You're 100% correct. Dyno's are a complete waste of time and money. Wonder why the factories use 'em.

If the factories use them no need for us to have to

It's not that simple. Part of the problem is caused by the way the emissions testing is done. There often tends to be a dip around the rev range where the testing is done so as to get good readings.

Not all bikes of any model are exactly equal, or are used the same, are at the same altitude, or the same temperature, but there is only one standard EFI setting. If you require completely new settings (eg aftermarket cans) you need new EFI settings which is where the Power Commanders come in.
Even without mods a custom map can result in a much nicer ride. Mine certainly did.

Some bikes, like most of the current Triumphs, have adaptive EFI and will modify their own settings within reason. You can still change the standard maps if you do major mods, but the bike can adapt to minor variations on its own. Or owners can assist with the "12 minute tune up".

Are bikes detuned before they leave ports in japan to meet our emissions laws ?

[onearmedbandit]

Do you think they spend millions in development but forget doing the last wee bit that "johnny at tommies yamaha" is trying to achieve
on his dyno ? Sure ya can get more horsepower, torque curve - but at what expense to longevity, reliability etc

Really? They do have to pass emission (as pointed out) and noise tests, each of which can have a bearing not necessarily on the top end (ie more peak power) but on smoothing out the dips which exist more often than not in the rev ranges where the tests are carried out. So how can this affect longevity and reliability if you are not actually increasing either the peak torque or hp figures?

Let's for arguments sake say it does. How much will it effect the longevity and reliability? Would it shorten the engines life say from 200,000km to 180,000? 150,000? 100,000? I'd argue things like servicing and environment would play a far larger part in reducing and engines life.

I have had my bike dynoed, no modifications to the engine, K&N filter, Yoshi tailpipe and Yoshi engine management system. After tuning it with the laptop we got a very healthy power increase (10%) and strong peak torque increase. What made the biggest difference though was filling in the troughs around 8 and 10 thousand rpm. That was about 15,000km ago and it's still running like clockwork.

[onearmedbandit]

Are bikes detuned before they leave ports in japan to meet our emissions laws ?

They are detuned in production. This is nothing new, car manufacturers have do it too. Also there are bean counters watching constantly trimming costs.

[brp]

But why do ya need a dyno when the dealers have all the NZ setting at your disposal - air/mix turns , altitude ....