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BDeakin

Joined:

Aug 02

Posts: 2

BDeakin says:

Excessive vibration from VFR800Fi

I currently ride a Honda VFR800Fi first registered in 1999. I have had it just under a year and it is low milegage, 15,000 miles. When I rev the engine whilst stationary and sitting on the bike I get a lot of vibration coming up through the saddle. This is between 6,000 and 7,000 revs only about half the maximum revs. You can also feel the vibration through the footpegs whilst in motion. Any idea what could be causing this as it does not seem normal for a VFR?:upset:

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  • Posted 3 years ago (22 August 2011 13:31)

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kcmc

Joined:

Jan 08

Posts: 6566

kcmc says:

Honda VFR 800 Fi 1999

Hi BDeaken and welcome to the site

I must say,over the years i have owned several VFR800s all pre V-TEC (don't much like the V-TEC)and they all vibrate through the pegs a bit,but not what i would call excessive.But enough to put a foot asleep over 20-30miles.Has it got a standard exhaust can on it,most after market cans make then run a bit rough at the bottom end,and the vibes are a lot more noticeable in the mid range(horrible to ride with a can and free flow filter,would need a power commander to sort the fueling our) .If its excessive,then there is probably something wrong,dirty air filter and oil can cause poor running,if you can hear a clacking noise from under the fuel tank,its the diaphragm air control valve. Usually a good indication you need a new air filter.Good Luck

KCMC:tongue:  

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preunit

Joined:

Dec 10

Posts: 11565

preunit says:

Welcome

Bdeakin,most bikes have some vibration thats more noticable at certain revs than at others,has it allways been like this?.

Also has the bike had its valve clearences checked lately/at all as they'er due to be checked at 16000 miles,usally they're ok but if the mileage is incorrect then there might be a tappety sound/vibration.

Usually the older vfr's are pretty much bomb proof tbh with the exception of reg/rec and exhaust collectors,hope this is of some help,i'm sure someone else can enlighten us more.:smile

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MarcusMarsh

Joined:

Aug 09

Posts: 2698

MarcusMarsh says:

VFR Vibrations

My 40,000-mile 1998 model has some vibration but nothing similar to what you are describing - more akin to that mentioned by kcmc (who really knows his stuff by the way) but it's not bad enough for me to suffer numb feet or hands.  Having said that, I do not sit on my bikes with the engine spinninng at 6,000 prm.

One point to add to what kcmc has said, there has been mention on VFR forums on a couple of occasions that balancing the throttle bodies / butterfly valves is often beneficial for bikes that are running rough or experiencing vibrations.  Perhaps kcmc has an opinion or some experience on that. 

You haven't mentioned the history of your bike but with that milage you are going to be due for the vale check on your next service.  This may also make a difference but, from what I have read, they are not usually that far out - if at all - at that mileage.        

[This Reply has been modified by the Author]

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bbstrikesagain

Joined:

Nov 08

Posts: 871

Probably just the way it is

I test rode a pristine 2006 model a while back and yes, vibey around 7 krpm - enough to make you regret that last cup of tea...  Mind you, I didn't like to keep the revs their anyway because mid throttle pick up through the VTEC transition seemed to be a bit of a lottery, so enjoy the bottom and top ends as you will.  It was fun to blast through the dreaded 7-8krpm on wide open throttle though... 

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fuzzrr

Joined:

Sep 06

Posts: 8580

fuzzrr says:

..

I had an '08 VFR v-tec as a curtosy bike.

I did a 30 minute motorway stint at 80 mph and couldnt feel my hands after it. Along with snatchy throttle, crap dual brakes, impossible to put luggage on. Kinda left it in the garage resigned to the fact that they are pointless and crap.

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bbstrikesagain

Joined:

Nov 08

Posts: 871

Harsh!!!

Okay, it didn't steer, linked brakes were awful, VTEC conspired to make a bike motor feel as flat as a car's (albeit half an american V8 muscle car motor), but there's a quirky charm, a pretty swingarm, free luggage, a nice fit and finish, pub techno bragging rights, and of course the OP probably quite likes his...

[This Reply has been modified by the Author]

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MarcusMarsh

Joined:

Aug 09

Posts: 2698

MarcusMarsh says:

V-Tec VFR's

Long before I had my 800fi I test rode a v-tec when looking for a new bike.  I really didn't like it.  The chassis was fine but the engine was flat and I didn't like the way that the v-tec cut in.  At the time I settled on a new Blackbird instead.

My 800fi I picked up as a 'second bike' some years later and I love it.  The chassis is a generation older than the t-tec so I guess if you rode both bikes back to back you would notice the improvements the later machine but the engine on the 800fi is better in my opinion.  (And I don't have to spare a thought about camchains)  

The v-tec / non v-tec debate has been raging ever since the later bike weas released.  I think that are both are very good machines and, as mentioned by bbstrikesagain, they are well made.  But, my personal preference is for the earlier model although I have not ridden a post 2006 bike.  I believe that the v-tec system on these models was re-worked to make it smoother and the transition from two to four valves less prominent.  .      

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