VFR800 vs VTR1000

[vtec]

Ahh so it was only noise reduction. I should have read the press releases better !!
Thanks Vifferman

I like the aggressive look of the new VFR but why not make it a full 1000cc.
At 800 they're nearly there already and it would have more torque making the VTEC unnecessary. Just my opinion.

VTEC doesn't just improve low down torque. What it does, is get rid of the compromise between low end torque, or high end power that is in inherent in any cam that has one lobe for the whole rev range. Thus providing good power over the whole rev range. It also improves gas mileage. You might notice a boost in power in the form of a kick when the VTEC system kicks in. If this is the case, then you just need to change lower the kick in point of the system until it changes over smoothly. Although, I'm guessing this isn't a problem on the bikes. It's a noticeable kick in Prelude, as they set it at 5000rpm for emissions purposes in certain countries, but on a car that's too high, and you get a spike in the power curve, which could prove dangerous, I'm pretty sure they'd make the transition smooth on a motorbike though.

I don't think they'd put in a VTEC system if it didn't offer any power benefits through at least part of the power range.

In the case of my car. The non VTEC I think gets about 160HP and the VTEC version gets 200 HP, and up to 220 in some of the VTEC models. But they also include higher compression ratio's.

[Lou Girardin]

VTEC doesn't just improve low down torque. What it does, is get rid of the compromise between low end torque, or high end power that is in inherent in any cam that has one lobe for the whole rev range. Thus providing good power over the whole rev range. It also improves gas mileage. You might notice a boost in power in the form of a kick when the VTEC system kicks in. If this is the case, then you just need to change lower the kick in point of the system until it changes over smoothly. Although, I'm guessing this isn't a problem on the bikes. It's a noticeable kick in Prelude, as they set it at 5000rpm for emissions purposes in certain countries, but on a car that's too high, and you get a spike in the power curve, which could prove dangerous, I'm pretty sure they'd make the transition smooth on a motorbike though.

I don't think they'd put in a VTEC system if it didn't offer any power benefits through at least part of the power range.

In the case of my car. The non VTEC I think gets about 160HP and the VTEC version gets 200 HP, and up to 220 in some of the VTEC models. But they also include higher compression ratio's.

The bike VTec system is very different, and basic, compared to the cars. Plus what works in a car is not necessarily good on a bike. Bikes need much more subtle throttle response.
It sounds like the bike VTec is a typically complicated Honda answer to a simple problem.

[dangerous]

The bike VTec system is very different, and basic, compared to the cars.

True.... and if not already said heres how the VFR VTEC works
Under 7000rpm only 2 valves per cyl are working...... at 7000rpm oil pressure trigers the other 2 valves to operate.

Another words a 2 valve motor has more snot down low but will not rev out... were as a 4 valve motor lacks the down low but will rev out producing more power than a 2 valve.
The VFR has the best of both worlds..... I guess.

[gav]

Hmmm, interesting. I've previously owned 3 V4 Hondas and 1 V3 Honda, havent owned a V twin, wondering what the fuss is about. Oh well, wait and see what turns up. So anyone here got a pre vtec VFR800 for sale?

[Teflon]

Hmmm, interesting. I've previously owned 3 V4 Hondas and 1 V3 Honda, havent owned a V twin, wondering what the fuss is about. Oh well, wait and see what turns up. So anyone here got a pre vtec VFR800 for sale?

VFR and VTR would be boring compared to the CBR. I would take out a SP2 just to be sure.

[TonyB]

True.... and if not already said heres how the VFR VTEC works
Under 7000rpm only 2 valves per cyl are working...... at 7000rpm oil pressure trigers the other 2 valves to operate.

Another words a 2 valve motor has more snot down low but will not rev out... were as a 4 valve motor lacks the down low but will rev out producing more power than a 2 valve.
The VFR has the best of both worlds..... I guess.

The thing is, Suzuki have managed to get the best of both worlds from the GSXR1000 without resorting to complicated gadgets. When it's running right even my 16 year old FZR1000 can power wheely in 1st at 4000revs (as I have recently been reminded). Now thats a lot of weight to lift with a gear that can run to 120k's. I rekon Honda should stop pissing around and drop the vtec and go to 1000cc

[James Deuce]

VFR and VTR would be boring compared to the CBR. I would take out a SP2 just to be sure.

Do they put pillion seats on SPs now??

[gav]

Looks like I've found one, 2001 Honda VFR800FI NZ New, One NZ owner, 26,000km, Remus high pipe, Metz Z4 tyres, tinted screen,

[Toast]

Between which years did the gear driven cams make an appearance on the VFRs?

...I'm a big fan of the gear driven sounds on the CBR250...I bet the VFR sounds awesome with them.

[gav]

I think 1986 to 2001, latest models have gone back to cam chains.

[dangerous]

Looks like I've found one, 2001 Honda VFR800FI NZ New, One NZ owner, 26,000km, Remus high pipe, Metz Z4 tyres, tinted screen,

No ya fat bastard..... not one of those slugs go for the twin...... na man that VFR looks bloody sweet, and I bet with that pipe on it it has the horniest sound
Is it a ChCh bike? awesome choice

[Lou Girardin]

VFR and VTR would be boring compared to the CBR. I would take out a SP2 just to be sure.

Even if he wants to do 500 km dayrides and 4000 km holiday touring two up?

[BarryG]

Well, I love my '95 750. But I loved my Hawk before that, slightly modded V2 in similar frame/ss arm to the VFR.
When it was time to buy something different, I was torn between the VFR and the VTR too, but found the 'right' VFR first. Fuel range in the twin is crap, and doesn't have the aesthetics of the VFR, but I'm sure I'd be happy with either (or both ).
Cheers
Barry

[inlinefour]

Id got the modern vtech vfr800, rather a sexy beast

[Swoop]

Australian Motorcycle News has a comprehensive write up on the VFR800. Sounds good.
"The new 2-stage valve control system, called 'V4 VTEC', is chain driven and aims to provide more torque through the lower and middle ranges by only utilising two valves in each cylinder until just over 7,000 rpm when the other two valves per cylinder also kick in to play. The bike responds with a distinct change in engine note and intake roar as all four valves come on song. Lower down in the rev ranges my seat of the pants felt only the slightest of improvements over the earlier non 'VTEC' model, but power seems a little stronger up top than before with a generous amount of over-rev."

"The new engine is noticeably quieter than the previous model. Gone is the characteristic whine from the gear driven cams in the 781cc V-Four engine. This is mainly due to the move to chain drive for the cams but also the reduction in noise from only having two valves per cylinder operating most of the time rather than four. The ultra smooth six-speed gearbox complements the sophisticated fuel-injected engine and the two work seamlessly together to provide reasonably strong drive at any road speed."
"I owned a pre 'VTEC' VFR 800 for a while and enjoyed over 20,000 kilometres on the model. When on a bike tour a couple of years ago I also covered around 4,500 kilometres on the earlier 750 model. The first generation 800 progressed more over to the role of dedicated tourer than the early 750 but this latest 'VTEC' 800 seems to have regained some more of the VFR's original sporting intentions."

6 speed gearbox.... Mmmmmm (serious drooling starts!)