Surging throttle during light accelleration.

I know this a common problem with sixth gen's. NorCal mentioned something about self preservation mode on the bike. I know it will do it if you overheat but could it be interfering with normal operation as well? My bike gets that annoying surging once it gets warmed up. Bone stock right now.

Does the pair valve mod work for this without doing anything else. I can't afford an exhaust and PC III right now. Any other suggestions would be appreciated. 2007 w/ 900 miles.

 

At 900 miles you need to wait until the bike is fully broken in (wait untill your second oil change) before you start messing with things to fix a problem that will probably go away.

 

As goinphaster suggests things get smoother with distance the Transition itself is smoothest after 10,000miles, also make sure the SV's are balanced also if you have a lot of time there are tomes on this very subject on the UK VFR site:

UK site VTec Fixes linky:
Honda VFR Club - VTEC questions, problems and fixes

 

Couple of things: 1) are you referring to the surging/flat spot at about the
4K RPM level? My '02 had this pretty severe (as did many of the early year 6th gen bikes). IIRC (w/o going into too much detail), this flat spot was part of the programming for emissions and many of us were able to almost completly eleminate this flat spot by installing aftermarket O2 sensors that plug into the stock O2 sensor harness. This was a common fix back then and I was hoping Honda had addressed this "glitch" by now. I just bought a new 2007 and it does not seem to have this problem. 2) These V4 engines are extemely "tight" when new and I found they don't really start loosening up until at least 3K miles - give it a chance to break in. Alsoyou might want to take the slack out of the throttle cable as it comes set up with way too much slack (for my tastes anyway) and too much slack in the throttle cable can make the bike more "choppy" to ride.

Good luck - I hope you get it figured out!

 

Thanks! I may try the O2 elim trick and leave the rest alone for now unitl it breaks in more. At least it may help until it becomes more tolerable. The surging is all around 2-5k. There are only 900 miles on it. It didn't surge when it was new. But yes, these engines are tight. I stalled mine all over the place until it broke in some. That's when the surging became more apparrent.

 

Ive got 250 miles on my 08 and the surge is the one thing I noticed also. ON/OFF throttal seems a little jumpy so I am going to take the slack out of the cable and see if this helps a little. Im used to a ZX10 with a slipper clutch, nothing but smooth from top to bottom, tranny and engine. Im getting used to the VFR tho, and I like it. :smile:

 

taking up the slack in the throttle was a big help in the parking lot and maintenance throttle in turns for me. I've got over 10K on my girl and she's much better behaved... or I've just grown accustomed to her.

 

one thing to think about......are you riding your machine in too high of a gear for the given speed? These machines don't respond well to being hot and being ridden at low rpm's in too high of a gear. these machines tend to favor the more aggressive/attentive rider, you will be punished repeatedly for being lazy with the shifter and ham fisted with your throttle inputs......I did the pc and elims at 900 miles and never looked back....

 

You hit it dead on.... especially when the engine is green like that. I have the O2 elims and PCIII also. Throttle is like a Rheostat now.:wink:

 

Can someone please tell me what o2 eliminators to get and where to get them. I'm clueless.

 

tbone -

O2 Eliminators are made by Power Commander. Go to their website and go through the selection prcess for a PC III module. Once there you'll see that they say you also need the O2 Eliminators (2 of them). Make sure they send you the right ones. My 2006 needs female connectors and they sent me the wrong ones. I am waiting on the right ones as we speak. It's an easy plug-n-play install that you can do yourself.

Note: If your bike is stock then that's all you need. No need for the Power Commander at all. If you have aftermarket pipes then I suggest getting the PC III and download a map that they give you also here on their website. They have a few to choose from. My suggestion if the later is the case, is for you to take it to a shop and have them install it on a Dyno to tune it in properly.

link: This is the link for my '06 model... if this pertains to your model year then simply click on the O2 Sensor Eliminator link they give you and order 2 of them. If you have a different year then plug in your year into the pull down menu.

Power Commander Downloads and Product Purchases, Maps, Installation Guides, Accessories

Stan

 

Thanks stan, I have them installed and it's working fine now. No more surging

 

Sorry.. I didn't notice the date on your post. Like that white!