VFR owners' thread, for VFRPS members and prospective members

[racefactory]

Well, after tinkering with various washers and air filters and the addition of a stock snorkel, I've got my V4 running like a beast! Pretty happy with it, pulls well through the mid range and flat spot is basically unnoticeable.

Little side effect of this change is that the pilot jet settings now seem a tad rich- stuttering slightly on the idle when hot and a little weak under 3k but you don't ride at those revs anyway. Carb balance is probably part of this though.

Can't be bothered getting the carbs off for the 4th time or so today so that'll do nicely.

Check out these hard to find videos of V4s being ridden how they should be. This guy below dominating a whole field of 600s etc on one of the most awesome tracks, Tsukuba!



Also this one of a very well set up bike having insane scraps with motards, 650s and stuff at Road America.

[Devy]

Well, after tinkering with various washers and air filters and the addition of a stock snorkel, I've got my V4 running like a beast! Pretty happy with it, pulls well through the mid range and flat spot is basically unnoticeable.

Little side effect of this change is that the pilot jet settings now seem a tad rich- stuttering slightly on the idle when hot and a little weak under 3k but you don't ride at those revs anyway. Carb balance is probably part of this though.

Can't be bothered getting the carbs off for the 4th time or so today so that'll do nicely.

Check out this hard to find video of a V4 being ridden how it should be, dominating a whole field of 600s etc on one of the most awesome tracks, Tsukuba!



Also this one of a very well set up bike having insane scraps with motards and stuff at Road America.

i have a noticeable idle shutter after doing the carbs aswell. u reckon it could be down to balancing?

and thats a sick video man. that my goal right now

[racefactory]

From what I've learned I think it's pilot jet settings and balancing. No matter if your carbs are perfectly in sync, if you are lean or rich on your pilots at idle it will never be steady.

Quick way to know if you are lean or rich on your idle is to blip the throttle... if the revs hang before settling down again it's lean, if the revs drop below the idle and then pick up again it's rich.

I think after you've got the pilots right then balancing will smooth out low speed running.

[Devy]

true. im probally running lean then cos it definetly hangs high for abit.
i havnt touched the pilots yet. just did the main jets and needle.

what have you done to your carbs soo far??

[racefactory]

Yeah if it hangs then it's definitely lean and that's why you aren't getting a good idle.

With regard to pilot jets, it depends if you are running a stock can or not. If you are running an after-market can then you will need slightly more rich settings than stock. A lot of guys seem to think quarter or half turn is enough.

My carbs? It's really my whole induction setup too. All I did was thoroughly clean them out, adjust the float bowl heights (stock), set pilot screws, experimented with different needle heights, add an unmodified snorkel, add the rubber flap in front of the headstock, used a different air filter.

btw does anyone know exactly why there is a sub air filter element and if there is any change if you leave it out?

[sil3nt]

Took about 10 hours but got this video uploaded



Quality came out pretty good seen as it was compressed.

[DrunkenMistake]

I watched it earlier, ashame you cant see past your screen, and that road looks mean for a speed test haha

[sil3nt]

I watched it earlier, ashame you cant see past your screen, and that road looks mean for a speed test haha

On one of the other settings you can see wider around and over the screen. I just forgot to change it. Also had it set to upside down when i recorded this as i had it hanging in the car windscreen just before i took this and forgot to change it back

Thankfully flipping the video is easy! Both my bikes have dark screens which is a pain for videos. The road is this one.


View Larger Map

Its a bit bumpy!

[DrunkenMistake]

Yeah the upside down setting is sweet, the one i took over looking my front wheel was upside down hanging off the side of the bike, christ haha its just one long ass road..

[DrunkenMistake]

http://maps.google.co.nz/maps?f=q&so...,1.454315&z=10
is the road I ride daily, in my vid i was heading to the city.

[Devy]

Yeah if it hangs then it's definitely lean and that's why you aren't getting a good idle.

With regard to pilot jets, it depends if you are running a stock can or not. If you are running an after-market can then you will need slightly more rich settings than stock. A lot of guys seem to think quarter or half turn is enough.

My carbs? It's really my whole induction setup too. All I did was thoroughly clean them out, adjust the float bowl heights (stock), set pilot screws, experimented with different needle heights, add an unmodified snorkel, add the rubber flap in front of the headstock, used a different air filter.

btw does anyone know exactly why there is a sub air filter element and if there is any change if you leave it out?

yeah ive got an aftermarket can, n ive done the pilot screw to.. did it as per 400 grey guide.. wind it up tight then unwind 2.25 turns

and i dont think it makes a difference to be honest, ive riden another vfr that went fine without the sub filter. mines just got alittle foam piece right now. might take it out the next time i open the airbox.

i havnt really experimented much yet will get into it eventually

[racefactory]

Try a half turn out (richer), should be good.

[Icemaestro]

I think I've got some in the garage. Will have a look for ya later tonight.

Any chance you have a stock right rearset?:-)

[Devy]

Try a half turn out (richer), should be good.

true. will try it out sometime and let u knw. thanks for the advice.

[racefactory]

I've got 2 brand new stock air filters here which I don't need.

If anyone wants they can have one for a couple of bucks. Think they are 60 bucks new?