juddery/sluggish below 3k

Took me about 4 years to get my hands on one of those big foot unicorn headers lol

 

With some clutch in, right?
I'm pretty sure I'd stall (or lurch uselessly) if I had the clutch out at 2k, no matter how little throttle applied.

 

A good fuel map really cleans up the low end. A good ignition map in addition to the fuel map, makes the VFR pull strong from 2000 RPMs.

Sent from my A0001 using Tapatalk

 

Is this a feature of the PCV that I could be taking advantage of?
If so, we should hang out sometime

 

Power commander is fuel only, for vfr800 applications. This is why I made the switch to Rapid Bike. A power commander will get you halfway there though.

 

Downshifting will maybe get you part way too.

 

I do have a PCV. And I actually tried crawling along in the 2k range today and, to my surprise, it worked ok (though obviously there was little to no power available there).
Sorry about jacking your thread, OP. You got your question answered, right?

 

It wouldn't by chance smooth out the vtec transition?

 

Yes a competent tuner can really smooth out the vtec transition with a power commander.
It is easier to do on the 2002-2005 VFR800 than the 2006-2010 VFR800. The 2006 plus vfr has a vtec window from 6100-6400 rpms, whereas the older 2002-2005 vfr is an on off switch vtec transition at 6800 rpms.
Either way, not a big deal, but you should inform your tuner of this before they start tuning.

 

Another thing to adjust is the SV or starter valves, have mine checked once a year and if it's out find the VFR is noticeably crisper accelerating from the lights just off idle after being adjusted.

Have added below link from UKs VFR forum by way of explanation.

http://www.bikersoracle.com/vfr/forum/showthread.php?t=77127

 

Another grand later.

 

Re the SV balance, my gen 5 owning ex Honda motorcycle mechanic only charges me the approx 5 to 10mins of his time it takes him to adjust them at the end of the service while I'm watching.

 

I wonder what your guy would charge you to chip your RE?

 

No need to, my mk1 gen5 single hole injectors has much better fueling stock than my previous early gen6 had with its 12 hole ones.

 

Pretty sure he means ride it like you stole it

Sent from my SM-G900I using Tapatalk

 

I doubt it has anything to do with 12 vs 1 hole injectors.

Sent from my A0001 using Tapatalk

 

Our friend John from down under is waxing aboot the joys of "vintage" Brit bikes, many of which are illuminated by The Prince of Darkness and fueled by the most amal retentive system known to man..and some chicas too..

 

BB has nailed it and of course I know there is more to it than single hole vs 12 hole however the fueling of my '03 Vtec was significantly inferior stock than my current gen 5 I've owned since '05 so much so I was irrationally angry at Honda for a while after for messing up such a good thing.

One thing to consider though was I'd cross ridden back to back a mates Gen 5 mk2 '01 and its stock fueling at rpms below vtec even with its HECS 3 o2 sensors and cat was better than the gen 6 leaving the later models 12 hole injectors as a difference. ;-)

 

The 2002 VFR was made to meet 2008 CARB Emissions regulations. That's no small feat. This makes for a bike that is very very clean, but has a lot of lean surging. You don't like the lean surging, pull the o2 sensors and remap, real basic stuff. No reason to lock your self in the dark ages to get a smooth running bike.

Sent from my A0001 using Tapatalk