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Remove Smog Pump or no?

I'm just going by my personal experience at Carnegie. Every single time I have brought that bike there, I've been hassled about the lack of a smog pump. It seems to be much more than a spot check. Even if they don't stop you at the entrance, a ranger can still give you a ticket for it if they see it in the park.

In any case, the "benefits" of removing it don't outweigh the potential problems.
 
In any case, the "benefits" of removing it don't outweigh the potential problems.[/QUOTE]

+1
 
So, would they check for something like an aftermarket carb or exhaust on a plated bike? Those and my (not there, since before I bought the bike) evap can could all be issues I guess.
 
Junkie said:
So, would they check for something like an aftermarket carb or exhaust on a plated bike? Those and my (not there, since before I bought the bike) evap can could all be issues I guess.
Click to expand...

For some reason, they just seem to have a hard-on for smog pumps.
 
Smog pumps dramatically reduce unburnt hydrocarbons and help convert more CO to CO2.
Removing it will not give you more power - it's injecting air into the pipe after the exhaust valve. It may even give you more power as it's raising exhaust temps, therefore lowering exhaust density (but increasing volume, so net result is probably nil).

Even if the above things had an effect, I've never been able to measure it on a dyno.

If you want the thing to actually increase your HP, connect the vacuum side to the crank breather to reduce crankcase pressure and therefore increase cylinder sealing and reduce windage losses.

But then you run the risk of it sucking a bunch of oil and dumping it inside your pipe if you drop the bike. Then you'll be *really* unpopular as your bike will be smoking for HOURS.
 
Interesting. I was just reading about this on thumpertalk. On my XR its still there. I was just going to go over to the breather kit too. I have had my bikes carefully examined to the point where they stick their finger in your pipe to make sure theres a spark arrester screen. And I bought the green stickered XR so they'd stop fucking with me.:(
 
westie said:
I have had my bikes carefully examined to the point where they stick their finger in your pipe to make sure theres a spark arrester screen.
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The ol' coat hanger in the tailpipe is one of the first things they'll check, by the way.
 
what OFG said is real. I talked to the rangers at HH and they won't let you ride because of non compliant equipment.
 
You can block off your smog pump by taking it apart and blocking the the hose inlets with JB weld. Then you can still have the pump on there but have the benefits of the block off. The main difference that I notice with blocking it off is that there is no deceleration pop. There is not any noticable power change. There is some good how-tos in Thumpertalk on this subject.
 
What it comes down to:

In an effort to appease CARB and the Sierra Club, OHV parks have instituted new emissions regulations concerning OHV vehicles. If you want to continue to be able to ride on public land, follow the rules, you won't miss the horsepower and the environment and your fellow riders will thank you.
 
Archimedes said:
So I'm preparing to rejet, open up the airbox and drill out the restrictor on the pipe on my new WR250F, but the kit I have also has the stuff to remove the smog pump and plug up everything. Not sure if I want to do that if it will run the risk of getting flagged at any of the riding areas.

Q. what's the downside of doing all the jetting work, but leaving the smog pump on?

Q. Do they really check for this stuff at any of the OHV areas? I've taken various bikes to the local places about a dozen times and never had anyone so much as look at my bikes, but I've heard stories.

Any advice would be appreciated.
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I've re-jetted my wife's and a few other WR250f's using the GYTR kit, removing the smog parts isn't necessary.
It seems the rangers check the Hondas for smog more than other makes, could be the only bike their trained to watch out for..
 
OK, I'll repeat myself because nobody seems to understand - it doesn't make ANY DIFFERENCE to HP.

It just squirts air down the exhaust. That's it.

So JB welding it up is just plain loco - you killed it's smog-reducing ability, but it's still a heavy lump on the bike. No Hp were added, just more unburnt hydrocarbons coming out the pipe.
 
Joebar4000 said:
OK, I'll repeat myself because nobody seems to understand - it doesn't make ANY DIFFERENCE to HP.

It just squirts air down the exhaust. That's it.

So JB welding it up is just plain loco - you killed it's smog-reducing ability, but it's still a heavy lump on the bike. No Hp were added, just more unburnt hydrocarbons coming out the pipe.
Click to expand...

Well I'm the OP and I got it. As an aside, I'm not concerned about HP. I'm concerned about making the bike run smoother than it does now. The only reason I was considering removing the pump was because I was under the impression that it affected fueling in some way. If all it does is cause the decel pop, I could care less and I will leave it on. I just didn't want to go through the trouble of rejetting if the smog pump was going to keep it from running smooth.

I'm a bit of an enviro-freak, so I'm happy to leave it on.
 
Good lord, chaps!

I was only referring to the peeps who posted about 'making more power' after my post.

:p

:teeth
 
. Jb weld the smog pump.. that's great!! Arm chair engineering! chairgineering. At it's best.

Insert graphic: some hick in a flannel wiping the JB weld off his hands on a towel.. "Ya, that'll do er, where's my beer now, Eh? ... and pass the brats."
 
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