Dirt biking has evolved!

[cave weta]

Information is on its way.... just emailed them!

[cave weta]

Ive been sent a PDF with all the info on the security straps. EMail me if you would like me to send it to you.

Ive been reading on the net about the hydraulic vs mechanical system for the AWD- seems that Yamaha pulled their tail between their legs and gave up in 2004 whereas the Christini system is performing well in extreme competition..

[I]The entire system adds only 15 pounds to the weight of the bike – compared with the 19 pounds of the system used by the Yamaha and KTM.

The system has already proven effective in hard enduro racing, with its reliability successfully tested in World Enduro, GNCC, Endurocross, Red Bull Last Man Standing and Hare scrambles over the last few months. Christini riders have consistently placed well, raising eyebrows amongst competitors, and are unanimous in their praise for the system. The effect is equally amazing for novice riders, who will simply spend less time stuck or falling over and suffer noticeably less riding fatigue.

[A&R]

You justfy the price once you have ridden it!- Whats a brand new standard CRF worth?- $12,000- im not sure.... OFFROAD IMPORTS Have got one sitting in a box ready for you for $18,500 but honestly, you are getting more than a bike and a half! they have KTM EXC300s on their way too- luurvely!
those yamahas cost a fortune and were not made available to the public punters. They were robbed of so much power using hydraulics.
This system comes with a 12 month warranty and 50 hour service intervals. (basicaly seals and bearings) the power loss is quoted at .2hp on the 250. you would never feel it..






COME ON, YOU KNOW YOU WANT TO......

I looked at one of those 18months ago. I had some quotes from christini in the U.S.A. they had a couple of demos at the time. Could have got one for NZ$12000 but couldn't afford it at the time. they got a real good web site shows you how it all works. would luv to have ago on one.http://www.christini.com/awd-technology.php

[cave weta]

would luv to have a go on one

Ahh well.... funny you should say that...
Off Road Imports are running AWD Experience days on my tracks!
$199 gets you 4 hours riding my tracks and testing the bikes. (minimum 2 riders)


come on Andy....
you need a thrill

[xwhatsit]

I dunno, I find it hard to believe that you only lose 0.2 HP.
No expert but just thinking about drive line loses/efficiency in cars etc.

- FWD loses = 20-30%
- RWD loses = 30-40%
- 4WD loses = lots, some Subi's can be 70% apparently.

Still, bet it would be fun

First of all -- I like your bike

On topic though, remember you're already factoring in rear wheel drive train losses with the horsepower figure they're taking. Probably dynoed a normal CRF250 and then dynoed a CRF250 with 2WD. So you're already talking rear wheel horsepower. Also, there's no hydraulics in this; it's pretty much direct mechanical drive (what is that -- chain drive to a drive shaft running down the fork leg?), so it's going to be fairly efficient.

0.2HP out of ~30 rear wheel horsepower sounds a little generous, but I reckon the power loss could be smaller than most would guess.

[pete376403]

I dunno, I find it hard to believe that you only lose 0.2 HP.
No expert but just thinking about drive line loses/efficiency in cars etc.

- FWD loses = 20-30%
- RWD loses = 30-40%
- 4WD loses = lots, some Subi's can be 70% apparently.

Still, bet it would be fun

That 0.2hp would be with perfectly lubricated and adjusted chains, gears, etc. It would possibly get worse as the system approaches it's maintenance interval.
Bevel gear diffs in cars suck up a fair amount of power but those numbers seem a bit high. I know there is a general "loose 30% power through the driveline" statement but, as I once read in a David Vizard book on that - say an engine makes 250Kw at the flywheel - conventional wisdom says you loose 30% - 83Kw in the driveline. Well, knowing how hot 2.4Kw (ie your standard domestic electric heater) gets, does the gearbox and diff get as hot as 34 electric heaters running a full output? Because thats the only thing power losses can be converted to - heat. Or maybe drivelines aren't as inefficient as has been claimed, and the "30%" figure has been pulled out of the air to cover the difference between someones supposed huge power engine and the far lower figure that it really delivers on a chassis dyno.

[cave weta]

That 0.2hp would be with perfectly lubricated and adjusted chains, gears, etc. It would possibly get worse as the system approaches it's maintenance interval.
Bevel gear diffs in cars suck up a fair amount of power but those numbers seem a bit high. I know there is a general "loose 30% power through the driveline" statement but, as I once read in a David Vizard book on that - say an engine makes 250Kw at the flywheel - conventional wisdom says you loose 30% - 83Kw in the driveline. Well, knowing how hot 2.4Kw (ie your standard domestic electric heater) gets, does the gearbox and diff get as hot as 34 electric heaters running a full output? Because thats the only thing power losses can be converted to - heat. Or maybe drivelines aren't as inefficient as has been claimed, and the "30%" figure has been pulled out of the air to cover the difference between someones supposed huge power engine and the far lower figure that it really delivers on a chassis dyno.

David Vizard was the god of speed in the 80s..
but my shiny, multipage, embossed full colour CHRISTINI brochure
tells me 1/10 of a horse power. is that american standard bred or english thoughobred? I dont know- Im off to bed, but if you want to ride it and find out for yourself- just make a booking....

[krad_nz]

Yeah those figures are ball park and not linear

A 1000kw FWD vehicle will not lose 250KW through the drive line etc. If it did.. well things would get hot fast.
Thats a lot of energy to dissipate as heat & noise & kinetic like you said.

In this case..... 0.2/30 = 0.67% losses. Just seems very low to me.

I have a Starlet that is old but is rated as 100kw at the fly wheel. Its slightly modified so I'm assuming that the mods have negated loss of power due to engine wear & age etc.
On the dyno it puts out pretty much 75kw which is 25% loss. Everything is connected via a mechanical linkage and the gear box hasn't melted due to trying to dissipate 25kw...... yet

And shaft drives are better than a chain system too I believe?

Anyway, back on to the goodies.

xerxesdaphat: I refer to it not as a bike, but as 'The Lump'.
Starts first kick most of the time too!

[cave weta]

That 0.2hp would be with perfectly lubricated and adjusted chains, gears, etc. It would possibly get worse as the system approaches it's maintenance interval.
Bevel gear diffs in cars suck up a fair amount of power but those numbers seem a bit high. I know there is a general "loose 30% power through the driveline" statement but, as I once read in a David Vizard book on that - say an engine makes 250Kw at the flywheel - conventional wisdom says you loose 30% - 83Kw in the driveline. Well, knowing how hot 2.4Kw (ie your standard domestic electric heater) gets, does the gearbox and diff get as hot as 34 electric heaters running a full output? Because thats the only thing power losses can be converted to - heat. Or maybe drivelines aren't as inefficient as has been claimed, and the "30%" figure has been pulled out of the air to cover the difference between someones supposed huge power engine and the far lower figure that it really delivers on a chassis dyno.

Oh by the way Pete-- Cool avatar! wallace rocks!

[theblacksmith]

2wd? Hmmm - probably get more life out of the tyres lol!!!

[cave weta]

Ive been chatting with the importer today. These AWD bikes will now be available in my rental fleet!

For $199 each, you and a mate can come to my private natural terrain tracks and put these machines through their paces! you will get 4 hours of riding including an hour on your own bike to familiarise yourself with the challenging hills and bogs in this awesome private venue. Then we will put a few steaks on the barbie while you will go over the technicalities of the machines with the importer himself.Then hit the same tracks on the worlds most advanced dirtbikes.
You will recieve a cd crammed with photos of your ride and a cashback voucher that will refund the full cost of your

ALL WHEEL DRIVE EXPERIENCE

if you decide to purchase your own Christini.