V-TEC surge

ok so i have a 02 with a power commander with the cozy map in it .
now im asking is there anyway to get ride of the v-tec surge ... i even tried tinyminds map cause i thought it was supose to take care of the surge ...
if i role on the throttle and keep it there there is very little surge but hanging around the 6000 -7000 rpm range its pretty violent .
also anyone out there hate the stupid v-tec ? in my opion it has to be the dumbest thing to put on a bike

 

I have 02 w/ chip no PC and only time the kick bugs me is rolling throttle on in top gear.
what are you doing that makes it anoying.

if you hammer on it ( not in top gear ) you hardly feel it.

 

A proper dyno tune will almost totally negate the surge. There will always be a change in power there, as that is the nature of V-TEC. There is no way around it. But when it is tuned properly, it can become so smooth that it almost isn't able to be noticed.

The issue is that below V-TEC the engine runs lean... this is for MPG and cruising. Above V-TEC it runs rich for more power. I've not got the PC yet but everything I've heard is that the Cozy map is what to use for just plug and play. However every bike will be different... even two bikes with identical setups. The best result will only be able to be done on a dyno where things are set up perfectly for your bike.

Take it to a good tuner and you will be pleased.

FWIW, I like the V-TEC. It suits my needs perfectly, giving me good MPG for daily use but giving me the power I want when having fun. I'll be getting a dyno tune when I get my PC but I expect that I will be using two maps... and switching between them depending on what I'm going to be doing. Since 98% of my riding is daily use and straight line riding to town and back... I don't really want the drop in MPG. The few times that I do get to go out and play wont really make it a hassle at all to whip out a USB cable and swap maps real fast.

 

i am not doing anything that is anoying me ...its the bike surging while im knee down on a corner and the surge hits that is anoying me . if i am upright and hammer on the throttle and ride through the gear there is bearly and surge ,its smooth . but like i was saing when im in a cornner around 6000 rpm and slowly role the throttle to 7000 it jerks . i just think it dump that i have to keep my eye on the rpm instead of the road . well i guess i could either go real hot in a corner way above the 7000 rpm or dog slow ... . i guess i will have to take meat loaf adivse and spring for some dyno time

 

plus1
time for dyno time...

 

I personally have the exact opposite response with V-TEC. If I roll on nice and smooth, there is no noticible difference in power and I accelerate very smooth and clean. It is only when I hammer the throttle do I feel the transition. I don't notice it hardle at all in 5th and 6th but in the lower gears V-TEC does hit hard when at WOT.

The difference could be the PC itself, as I'm almost bone stock except for the K&N air filter.

Dyno it, get it tuned perfectly, and you'll be happy you did.

 

A custom map is going to help your cause. Another thing that makes a dramatic difference to VTEC engagement is gearing. Try bringing some power back to mid-tach by dropping a tooth in the front or going up two or three in the rear. That simple mod was one of the best things I ever did for my bike. Also if you're riding aggresively why would you ever let the tach drop below 6500 or 7000 to begin with? Just keep your R's up, the bike is built for it and I can assure you that there is not enough power in the VFR to get the back end loose, provided you're smooth with the throttle.

VTEC is not a lean or rich thing. Keep in mind that running rich is a power killer. It is a valve thing. Two valves in use under 6700rpm and four valves going after that. European emissions seems to be the biggest reason for the VTEC.

 

At the risk of being howled at the VTec engagment was the only thing I disliked about my previous '03 Gen 6, riding though twisties I'm a little lazy liking to single gear it using the VFRs linear power from 5.5k to 9k but with the Vtec used to keep above 7K swapping to lower cogs earlier than I liked to stop it from coming in and out.

Admittedly I never felt VTec engagment upset the VFR mid corner or when wet make me feel unsafe I just didn't like it, a Gen 5 was the only way I could cure my Vtec problem fully. :bolt:

 

Hey Northern, Keep the kettle on the boil! If your knee draggin under 6400 rpm you are in too high of a gear. Drop down one before the corner, stay in V-Tech and use the engine for smoother braking and acceleration. 7 or 8K in the corner will keep you in V-Tech and give you just the power your looking for coming out of the turn.

As Mikey says "Try it, you'll like it"

 

I love my VFR, but I would prefer to have 16 valves moving at all times. MPG and lower emissions are very low on my list of proirities....

 

how do you knee drag on a portable phone? lol

 

Simply put the VTEC is a failed marketing gimmick and it sucks!! It is one of the most annoying things I have ever experienced on a motorcycle in 20+ years of street riding. I know some people say they have been able to smooth the transition with an aftermarket exhaust, custom map, O2 eliminator, etc. but why the hell should I have to spend $1000+ to get my bike to run more smoothly? The only reason I bought the 6th Gen is because I have loved VFR's my entire life and I got a smokin' hot deal on it from a good friend who is the general manager of a dealership. When I first bought it I planned on riding it for a year or two and then selling it for what I paid but unfortanately the ecomony tanked and I got stuck with the bike. The bottom line is that I love all motorcycles and I still get a smile on my face whether I am riding a two stroke dirt bike, a cruiser, a sport bike, or an annoying VTEC sport tourer.

Regards,
Rollin

 

hey rollin again im on your side , vtec is anoying . all a big sales gimmick
a motorcycle engine should be smooth through out the whole rev ... i really do love the bike but that alone may make my decision to sell and move to a FZ1

 

I went full circle with my 2007. For the first year I loved it and I liked the two-stage VTEC performance. But once I got my Triumph 675 as a second bike the VTEC started to be an issue. My throttle control was geared more towards the linear power of the 675 and I found that I was often a bit tripped up by the VTEC (the worst was when I would happen to upshift just after the engagement point which made things a bit jerky). Then the whole bike started to feel ungainly after more and more 675 rides. I don't like the steering on the VFR. I finally just felt it was silly to own a bike that wasn't getting ridden so I traded it for my Kawasaki. Now I have the perfect two bikes for me.

 

we have the same bike and for the record my transition is smooth.

 

I really think you should sell it. No need to keep a bike you don't like and there's no need to stay frustrated when you can just make it go away. There are lots of happy 6th gen riders, it's best your bike goes to one of them.

 

As many of you know, these VTEC threads get pretty polarized. I often see things right down the middle so in the interest of being the mediator, remember this:

Many bikes have pronounced dead spots and/or peaks in their powerband. An inline 4cyl is going to be have a peak somewhere past the middle of the range. This peak is often very similar to the VTEC kick. So is the VTEC kick really that different from other bikes power delivery quirks? The VTEC DOES have a real increase in NOISE and many folks feel the kick even more than they might because the noise is interpreted as more power (it is funny how our senses mix, eh?).
And if you all wonder why some of you seem to have such different reactions to the same bike, just remember that even within one person there can be a real argument...after all, I went from loving the VFR to trading it away. Things change. What is good for you isn't good for the next guy. There are alot of bikes out there and they don't get hurt feelings when you trade 'em out. They get over it! (Those SLUTS will turn a trick for anyone's throttle hand!)

 

I've been riding for twenty years and have yet to find a bike of any type that does not have a powerband to one extent or another. The bigger question is why anyone would by a bike they knew they were not fond of. One has to wonder what type of rider is so good that they are unable to change their technique somewhat to suit any paticular motorcycle. I bet Valentino Rossi just jumped onto that Yamaha and it was a match made in heaven.

 

I like you guys!

The VFR may not be the perfect bike but this Forum is THE PERFECT FORUM! (And trust me, I know because I am on the Triumph and ZX Forums. You folks are Gentlemen!)

 

I guess no one remembers the 2 strokes.

For one WTF you guys doing ripping around corners on the street at over 7,000rpms
as a ex-racer and owning a 6th gen i run it around 5,000-5,500rpms and let the torque
pull me thru the turns and by the time you get the bike straight you rip on past it and never feel it.