Removing Californian emission pipework

Hi
As the emission control pipework on my 87 VFR 700 is not required here in the UK, what do I need to do to remove it and turn it into a "49 other states" machine.
IE..once the pipes are removed what is used to block the holes that are left
Thanks
Roger

 

Simple small rubber cap ends should work.

 

I take that you air talking aboot the pipes in the head. You can cut them off , leave an inch or so, crimp the end shut then bend it over and crimp it again. Been the way I have done it for years. Crusty could provide a pic if you can get him off his ass, did his a year or two ago.

 

If I can just cut them of and crimp them, how about using a bolt to seal the hole?
Is this head vent not normally used in the other spec machines.
Can anyone post pictures of this area of their bike so that I can compare it to mine
Thanks

 

Can't you just cut some plates out of 1/8 aluminum and drill two holes in them and bolt them on with little high temp RTV. That's what I did, I haven't fired her up yet... but I don't see why it wouldn't hold.

 

Every time I've heard of someone try to remove the Cali emissions they have run into lots of trouble - the bike won't run right. The solution is to get 49-state carbs. To my knowledge there isn't any significant performance gains to be had. If it was me, I'd leave that part alone and search for more performance elsewhere.

 

Not surprised........

 

well I will atest to not having any back firing on deceleration as far as power is concerned yeah your right no noticable difference
not anal about weight but it gave the ol girl about a five pound face lift when the removal was all said and done...I will take some pictures of it for you tomorrow... its to late now and I think the flash from the camera would freak my nieghbors out

 

My understanding is the PAIR valve is designed to help burn excess unburnt hydrocarbons under decel conditions. Vacuum opens the valve . Opening up the system by using aftermarket exhausts results in less backpressure allowing more fresh air in when the valve opens and tends to increase gurgling and popping. Since the PAIR valve shouldn't be open at all under acceleration, unless it's malfunctioning it should have no effect on power.

 

You are absolutely correct - however the PAIR system was not introduced into Honda motorcycles for another 10 years after the bike in question was produced. Because of that it's not part of the discussion here. The Cali emissions are primarily the vacuum recovery of gas tank fumes upon startup. This is not unlike the cars of the 70's. It seems as though motorcycles have lagged behind autos at least 15 years in the emissions department.

 

new motorcycles have emissions crap on them....... how is that lagging behind? anyway the Original poster didn't want a debate about this .....pictures later today after I get the sleeping child to school....

 

No debate, I didn't think. (?)

One example: motorcycles didn't start coming out with catalytic converters until decades after automobiles. That's the lag I was referring to. This is not a new motorcycle being discussed but rather one from 1987. It's system is more closely related to one from an early 1970's car.

 

Correct on the year PAIR valves were introduced Jamie, I was answering tinker's post about his dyno runs. As usual the orginal post has become lost in translation .... Again heeheeeheee

 

yeah everybody gets a lot of exercise here..flying off the handle and jumping to conclusions. ound:


Threads around here have a way of being Homer Simpsoned....
"What!!! Purple monkey suitcase!! Why you little........."

your right about the cats... they started implementing them on all gasoline burning vehicles when they did away with leaded gas....(at least I believe that's the time table) I miss leaded gas......

 

I think this is what TOE was talking about...

 

Hi all
Yes thats it, a picture paints a thousand words etc...
Thanks

Roger