Hi all, first post but not a new rider.
Just picked up a co workers '07 VFR 25th Ann Ed. with factory bags, Sergeant seat, Heli risers, Throttle meisters. 5600 miles. Got it for a great price! I think? (2 yr old left over)
Slapped some new tires on it, (PR2's) and my initial impressions are not that great.
Feeles like it stumbles bad at anything below 3K RPM. Very snatch y throttle.
V-TEC kick at 6400 is very noticeable.
Clutch is not smooth with engagement at all. I read in a different post that my "Bird" had the same master cylinder, that bike's clutch engaged very smooth!
Factory pipes were hollowed out.
Being a lurker here for a while I assume I need a Turbo Tom FPR (no longer available?)
PC5 from fuel moto.?
Anything else to smooth out the motor? Particular y the idle to 3000 range!
Thoughts?
My recent bike history is a
'01 CBR1100XX
'06 ST1300 smooth!!!
'08 ZX14
'09 Star Raider
3,000rpm is very low for this motor. It's a 783cc engine and has a lumpy response at low rpms - I would never attempt maneuvers or big changes in throttle from that low. I love my V4 engine, even the lumpiness at low rpms so I think it either grows on you or not!
I imagine if theres even the slightest bit of fuel injector clogging its going to be bad, cause even perfect stock condition its lean in the 1/4 throttle area. if it has modded air and pipes it will be worse too
Take your throttle slack down to about 2mm, it will help your wrist position , that wrist postion can cause weird bucking at times, with alot of slack. So it aides greatly for that, make sure you can turn lock to lock without raising rpm..
my clutch I find fairly smooth, course it has 90,000 miles , these bikes really take a good 10,000 mile to seat.
But if you really want to fx the lean area, a PC may be needed.
My 07 RWB is pure stock when it comes to engine/pipes and is very smooth from idle. In 1st it can "jerk" a bit but that is really just the FI being responsive to input and just takes a bit of getting used to. Given all that I think the issues you describe could be traced to (not as likely) #1. <5,000 miles means a lot of sitting time and ETOH/fuel mix is notorious for causing deposits when it evaporates - try running some Seafoam or similar additive through a tank or two of fuel. but (more likely) #2. gutted cans are the issue - either replace with complete stock cans or get a PC to solve the fuel issues. Then enjoy the bike.
Yes, the throttle cables are adjusted properly and I ran a half can of Seafoam through it already. May have to go with the PC I guess.
Being a four yr old bike I may just flush the clutch to see if it helps.
Although it's my first small cc bike in a long time, I still thought the low <3000 rpm would still be smoother though. RPM's are not steady when holding throttle around 2500, they jump up and down like the TB's are not in sync per se.
Welcome!
It's like coming from a Big Block Chevy to a 4 cyl. compared to what your use to! :blush:
Theres not much below 3k on a vtec and as mentioned the gutted cans only add to the already Lean Map condition.
Thanks! Just talked to Fuel Moto and of course they suggested their PC V as they know very well about the lean condition down low on these bikes. Will report back once installed!
[image: View Post]davesxx01, on 15 August 2011 - 11:02 AM, said:
Thanks! Just talked to Fuel Moto and of course they suggested their PC V as they know very well about the lean condition down low on these bikes. Will report back once installed!
You'll be happy with the PCV results. My 07 is much smoother now with the PCV installed.
I second what Ripper said, putting a PCV on my 07 made a huge difference in smoothing out the power flow, I would highly recommend it. I used one of Codewriters maps (Rev 3 if recall) and it works great.
[image: View Post]Rossgazz, on 15 August 2011 - 02:55 PM, said:
I second what Ripper said, putting a PCV on my 07 made a huge difference in smoothing out the power flow, I would highly recommend it. I used one of Codewriters maps (Rev 3 if recall) and it works great.
:+1: .........or + 2 in this case. I have an 06 and a PC should be everyones first upgrade for their 6th gen.
I bought an '07 last Sunday with 890 miles on it (completely stock) and felt the same about the low-end responsiveness/chuginess. I finally realized that I was just keeping it too low in the revs (was used to my SV650). For me, that made all the difference in the world. Of course - it looks like you've got a few more variables to deal with than I do.
It's a tall six speed so riding around at 3,000 RPM isn't necessary - rev'er up a bit. Your Blackbird and ST will do 3,000 in any gear with gobs of power if you need it - not so with the VFR. If you ride between 4,500 and 6,000 you'll feel the midrange the bike is famous for.
The VTEC gets smoother as the bike gets broken in. 5,000 miles is barely broken in. :biggrin: Mine really smoothed out about 18,000-20,000 kilometres. I use the transition from the VTEC a lot and now it's barely even noticeable except for a lot more zip.
It took me a while to get used to the touchy throttle, too. Now I don't even notice it.
Well, today I installed a PC V from Fuel Moto, plugged the PAIR hose, took off the snorkel, took up the slack in the throttle cable.
First ride was nice! A lot smoother down low, bucking/jerkiness is almost all gone. The VTEC kick seems much more pronounced though, almost like it stops for a second then hits hard.
Looks like they added a LOT of fuel in that range.
Anybody have a nice map for this to smooth out the kick at 6400? Or is that something the PC V cant change because it's a mechanical thing?
you need to get your own custom map made for your bike on a dyno. no "canned" tune will be perfect for your bike.
it will usually be better than stock if your mods are similar, but every bike is different, irregardless of mods.
just finish up your mods (if you want to get a kn or headers or slip on etc) and get a proper tune done. you wont regret it.
the vtec will almost completely disappear except for the change in tone.
p.s. you installed the o2 eliminators right? and did you remove the flapper?
also yes i agree with you, the clutch sucks and the worst part is no one seems to care too much about it though...
[image: View Post]davesxx01, on 18 August 2011 - 01:35 PM, said:
Well, today I installed a PC V from Fuel Moto, plugged the PAIR hose, took off the snorkel, took up the slack in the throttle cable.
First ride was nice! A lot smoother down low, bucking/jerkiness is almost all gone. The VTEC kick seems much more pronounced though, almost like it stops for a second then hits hard.
Looks like they added a LOT of fuel in that range.
Anybody have a nice map for this to smooth out the kick at 6400? Or is that something the PC V cant change because it's a mechanical thing?
All in all, much nicer drive-ability!
PC V is much needed!!!
You're right there is a HEAP of fuel in the midrange on the Dynojet map. As for the VTEC kick, do some experiments to confirm when it's kicking hard. I would recommend easing through it slowly on a small throttle, and racing through it at WOT (plus a few tests in between) to see when it happens the most. Mostly I've found it only kicks when the engine is just hot enough to engage VTEC (65 degrees C coolant temp), but once it's at 76 degrees C or higher it's smooth. If your results match mine, I'd call it normal.
Bought my 05 with 4k miles on it. Wasn't lumpy, but wasn't that smooth either. Now with 11K on it, the bike is running much more smoothly. If you are used to the big fours (I was from BMW), the riding style has to change to enjoy the VFR. I would:
Keep it in lower gears and higher revs where it shines.
Wear ear plugs so you are not distracted by the higher revs
Smile
Some of the other tech ideas also may work for you, but this motor gets smoother with age. That problem is only solved by riding with a smile on your face. The gear box improves with age.
[image: View Post]mikeodial, on 19 August 2011 - 05:43 AM, said:
Bought my 05 with 4k miles on it. Wasn't lumpy, but wasn't that smooth either. Now with 11K on it, the bike is running much more smoothly. If you are used to the big fours (I was from BMW), the riding style has to change to enjoy the VFR. I would:
Keep it in lower gears and higher revs where it shines.
Wear ear plugs so you are not distracted by the higher revs
Smile
Some of the other tech ideas also may work for you, but this motor gets smoother with age. That problem is only solved by riding with a smile on your face. The gear box improves with age.
I'm quite positive that all suggestions here are good ones - but for the time being at least, I'm going to follow your lead. I already spent quite a bit more on the bike that I'd intended - I need to be judicious on my upgrades...
[image: View Post]CandyRedRC46, on 18 August 2011 - 05:30 PM, said:
p.s. you installed the o2 eliminators right? and did you remove the flapper?
also yes i agree with you, the clutch sucks and the worst part is no one seems to care too much about it though...
Yes, I did install the resistors! Flapper still hooked up though.
End of thread · 20 posts recoveredWayback Machine snapshot 21 Jun 2012