I'm thinking of de-smogging my 4th gen. Does anybody know the best procedure to go by? What to remove/unplug?
Are there any cavets? Like any smog part that's connected to it's normal running?.
I have a California bike; I dunno if that's any different then a 49-state.
I also plan on installing a jet kit. I have a TBR exaust and it pops on decel all the time.
Step 1: Cap all ports on the exhaust side of the heads where the chrome tube s go in with a flat plate, some high temp gasket pooky and original bolts.
Step 2: Unbolt exhaust pumps from inside heads. Plug all vacuum tubes feeding pumps. Remove and discard pumps.
Step 3: Remove and discard all chrome air tubes. Fun considering where they are run..
Step 4. Seal where air tubes go into air box over carbs. I epoxied mine shut with plugs.
Step 5: retune engine. It WILL be leaner.
Honest Mr. EPA man, it was that way when I bought it. :blush:
Larry
VFRrider
I'll be curious what affect it has on gas mileage.
My 94 with all that stuff removed (bought it that way) gets 47-48mpg.
My other 4G's get ~42-43mpg.
I plan on remonving that stuff on the other bikes, I already have the caps, bought from PTO (?).
Paul in SoCal
[image: View Post]vfrrider, on 02 September 2010 - 04:43 PM, said:
Step 1: Cap all ports on the exhaust side of the heads where the chrome tube s go in with a flat plate, some high temp gasket pooky and original bolts.
Step 2: Unbolt exhaust pumps from inside heads. Plug all vacuum tubes feeding pumps. Remove and discard pumps.
Step 3: Remove and discard all chrome air tubes. Fun considering where they are run..
Step 4. Seal where air tubes go into air box over carbs. I epoxied mine shut with plugs.
Step 5: retune engine. It WILL be leaner.
Honest Mr. EPA man, it was that way when I bought it. :blush:
Larry
VFRrider
[image: View Post]vfrrider, on 02 September 2010 - 04:43 PM, said:
Step 1: Cap all ports on the exhaust side of the heads where the chrome tube s go in with a flat plate, some high temp gasket pooky and original bolts.
Step 2: Unbolt exhaust pumps from inside heads. Plug all vacuum tubes feeding pumps. Remove and discard pumps.
Step 3: Remove and discard all chrome air tubes. Fun considering where they are run..
Step 4. Seal where air tubes go into air box over carbs. I epoxied mine shut with plugs.
...except this one:
http://www.vfrdiscussion.com/forum/uploads/1218143654/gallery_362_402_42014.jpg
0283.jpg
Mine was a 3rd gen, but should be the same on the 4th.
Ciao,
Charcoal canister and PAIR valves
http://dropbarscinde...10/09/pair.html
I don't know what the "exhaust pump" is, I'll have to look into that one.