does anyone know a web sit to buy a k&n filter that replaces the entire stock air box, for cheap?
i went to the k&n web sit and found the k&n filter for the gs500 that was like the $55, but is that the whole replacment for the stock air filter box or just the filter ?

http://www.gstwins.com/forum/viewtopic.php?t=2639&highlight=ru2970

This one replaces the stock airbox w/ a single, dual flange filter.

i went to that page and then went to the web site. is it necessary to buy the all the oils for the filter or can i go to the local bike shop and just buy one of the oils?
and for anyone who knows is it easy to install?
is there any rejetting for a 98?

Chimivee - That's right, DonL not Kerry who posted this.  I got mine for $29.95 Free shipping.  But I think it ended up 31 and change.  I think it was tax.

Only problem with the K&N Pod filter it If you ever get caught in the rain or lots of water on the ground, it will suck into the filter.  This is the main reason the stock air box is designed the way it is.

But man does it change the sound of the engine.  I got a Cobra F1s just so I could hear the exhaust over the intake sound.

Keep your stock air box just in case ?

Paul

Quote from: mes_423is it necessary to buy the all the oils for the filter or can i go to the local bike shop and just buy one of the oils?
and for anyone who knows is it easy to install?
is there any rejetting for a 98?

I would get the K&N specific oils, which should be available at your local bike shop.  If it's like the auto filters (someone confirm?), they come pre-oiled, so you don't have to buy the oil/cleaner for a while (when it's time to clean).

I just ordered one they other day, (thanks pkaaso), so I haven't installed.  But it should be very straight forward: Unclamp 2 clamps, remove blow-by hose and take out airbox.  Put in K&N, tighten clamps.  The only thing you need to consider is what to do w/ the blow-by hose (entered top of airbox).  Here's some info on that: http://www.gstwins.com/forum/viewtopic.php?t=3154&highlight=k+n+pod

You must rejet.  Although, this will give you a good excuse to do it, cause it REALLY improves the bike.

I just pulled my plugs to look at the color.  I think I'm still running too lean.  the plugs are just a very slight hint of tan but mostly white.

I have an 89' with fresh valve job and rings and hone on the cylinder.
I'm running the K&N pod filter and the Cobra F1S.

The pilot jets and the pilot screws only effect the bike at idle and just off idle.

I am currently running 40 pilots, with 150 Mains and 3 turns out.  
Mikuni 40 pilot jet # 42-7130 Non Bleeder type
Mikuni 150 main jet # 42-1680

I am going to try a bigger main jet.  152.5 Mikuni part # 42-1685
Or, 155 Mikuni # 42-1690

I'll keep you informed.

Paul

what oil do i need to buy to oil up the k&n filter from this web site http://www.usdieselparts.com/knfilters/category.cfm?Category=13
thanks

I bought that K&N from that place and put it on yesterday.  One thing I notice is what the heck do I do with a couple of hoses....

There is the crankcase vent hose, that's no biggie.  I bought a PCV valve from an auto parts store and a PCV filter and wired it up (sure would like to hook up a vaccuum source).

What is the hose that comes off the T-fitting in between the carbs?  The manual says this is a "fuel inlet" hose but it is not the "fuel inlet".  I was thinking this was a vent tube but need some help.......

The K&N is clearly marked "oil before use" so I had to go to the bike shop.  There was all kinds of air filter oil, I grabbed the K&N stuff just in case.

Also picked up 138 main jets.  These look different than the stockers - what gives?  They are not slotted to take out with a screwdriver.  They are hex.  Same same?

Quote from: V8PintoI bought that K&N from that place and put it on yesterday.  One thing I notice is what the heck do I do with a couple of hoses....

There is the crankcase vent hose, that's no biggie.  I bought a PCV valve from an auto parts store and a PCV filter and wired it up (sure would like to hook up a vaccuum source).

What is the hose that comes off the T-fitting in between the carbs?  The manual says this is a "fuel inlet" hose but it is not the "fuel inlet".  I was thinking this was a vent tube but need some help.......

The K&N is clearly marked "oil before use" so I had to go to the bike shop.  There was all kinds of air filter oil, I grabbed the K&N stuff just in case.

Also picked up 138 main jets.  These look different than the stockers - what gives?  They are not slotted to take out with a screwdriver.  They are hex.  Same same?

V8 - The K&N I bought came in a plastic bag marked Oiled From The Factory.  No need to oil.  What part number did you order?

If  your bike is pre 01, it's the wrong jet I think.  I have a Mikuni catalog at home. I'll take a look this morning when I get home.

Paul

The only hoses you need to concern about, is the Fuel hose (Tee at bottom between carbs)  and the Vacumm hose on the one carb (the left one on pre 01's)  

The tee between the two factory 90 degree hoses just at the float bowls go to the charcoal unit.  I eliminated this and just let the hose dangle down with the other hoses.  The Tee at the top I added a hose and let it dangle too.

Those who are experienced have said that these two hoses should be open and not capped.

Hope this helps.

Paul

does anyone have any manuals or picts on how to put it in. looked at my bike this morning and i was like man this isnt going to be fun.  do i have to remove the gas tank or what? i got a clymer manual will it say how to do it in there? any help or added picts or instructions will help. oh and i ordered it last night. im so excited

It's really quite simple.  Yes, you need to remove the tank.  After you've done it once, it's easy.  It's in the Clymer - I think if you go to the section about replacing the air filter, it should tell you how to access it.

Basically,  you remove the rear body work, unbolt the tank, close the petcock, remove a few hoses, then lift out the tank.  Be careful where you put the tanks so you don't damage the petcock.  Label the hoses coming off the tank to make sure they get reconnected correctly.  If you've done it before, it takes under 10 min.  

Be sure to get your jets BEFORE you start so you can rejet at the same time.  The bike won't run well w/ the K&N until you rejet.  It's a little more complicated than just an air filter, but is very doable.

Here's the member pages w/ the how to (also shows how to remove air box):

http://www.angelfire.com/mt2/mikesgs500/rejetting/
http://electrovw.tripod.com/welcome/id17.html

Quote from: Pkaaso

Quote from: V8PintoV8 - The K&N I bought came in a plastic bag marked Oiled From The Factory.  No need to oil.  What part number did you order?

If  your bike is pre 01, it's the wrong jet I think.  I have a Mikuni catalog at home. I'll take a look this morning when I get home.

Paul

I got the RU-2970 part number.  The instructions say "oil before use".  I looked at the plastic bag for something saying I didn't need to oil it as I had heard that mentioned here before....  

BTW - I just took a ride around the block.  I LOVE THE SOUND!!!!!!!!!!  The air intake is LOUD now.  My wife even noticed it.  I love it.  Can't wait to get the Supertrapp on.

The bike (1989 Nevada bike) didn't stall or cough or anything (127.5 jets are in there) but I could tell it was a little lean.  It still fires right up though.  Just feels like it would make good use of a bit more fuel.

Not sure what the heck kinda jets I got.  The parts dude said "we have Keihin and Mikuni" and I said "Mikuni" and he pulled out a box of jets and gave me a couple of 138's..  He didn't seem to knowledgeable though....

I am going to take the pictures of the correct jets from your link to the dealer and see if I can get a different person to help me....

Sorry.......122.5's are in there.

Parts guy had given me the wrong jets (he looked pretty out of it...).  Talked to somebody else and they said "oh yeah, those are the wrong ones".  

They didn't have two of anything except 147.5's though.....  I think that's gonna be too rich.  Bike has no real mods except the K&N RU-2970.  I have a Supertrapp slip on that will go on soon but not yet....  If I can get to it today I am going to put the 147.5's in and see....

Get a magnifiing glass and double check the numbers on the jets.  I would try the 147.5's I think they may be a bit lean still but better than the stock ones.  I would reccomend against running it with the stock jets... Way too lean.

Check your plugs after 5 miles or so.  If they are not tan but still white, they are too lean.

The filter puzzles me.  Are you sure about the oil thing? I tried to find my plastic bag my filter came it but couldn't.  Maybe we need to contact K&N and ask if they ship this filter both ways or something.

Quote from: PkaasoI just pulled my plugs to look at the color.  I think I'm still running too lean.  the plugs are just a very slight hint of tan but mostly white.

I have an 89' with fresh valve job and rings and hone on the cylinder.
I'm running the K&N pod filter and the Cobra F1S.

The pilot jets and the pilot screws only effect the bike at idle and just off idle.

I am currently running 40 pilots, with 150 Mains and 3 turns out.  
Mikuni 40 pilot jet # 42-7130 Non Bleeder type
Mikuni 150 main jet # 42-1680

I am going to try a bigger main jet.  152.5 Mikuni part # 42-1685
Or, 155 Mikuni # 42-1690

I'll keep you informed.

Paul

I have tried 152.5...Even in February in Canada (well I haven't been anywhere colder than that so all you alaskans can ask me to shut up) it was too rich for the top. You may have been doing a plug pull at idle...that is after a ride you come to a natural stop and then shut off and pull the plugs...That will only give you a idle reading. To do say 3/4 throttle pull you get the bike running and warmed up and ride it for 15 mins or so. Then find an open road and hold 3/4 throttle in 6th till the rpm stabilizes (mark the grip where 3/4 is) for 4-5 seconds then hit the kill switch, pull in the clutch and shut the throttle in tnat order...Then pull the plug and see...Very very painful I know, I usually let it cool for 5 mins or so to keep super hot motor internals from seeing cold air and when I pull the plug I put in replacements I carry along. That is accurate for varying throttle plug pulls. At idle you may very well be lean...open the air screw...You put bigger jets in you'll make the top end waaaay richer and the bottom end would nearly be the same. So the issue remains...Try idle screw and float level in that order.
Cool.
Srinath.

BTW I have the right cyl set to 4.5 on the airscrew and the left to 2.5...so 3 is just a starting point...I need to accurately check and re set my floats and see if anythign is cloggin up the passage on the right cyl.
Cool.
Srinath.

Hmmmmm...  I will have to try that.  I'll bring along a plug socket and try this method.  I think the trick is to run it at 3/4 throttle and hit kill and pull in the clutch to stop engine from turning as quick as possible.

I'll report with my findings.
Thanks Srinath.

Paul

the description on the site says, 'universal rubber filter', i'm assuming that this is correct?  i currently have a 93' w/ a yosh exaust and nothing has been done to the carbs (i.e. jetting, mixture screw).  i have had the carbs off before, but how difficult is it to jet it correctly?  what size jets should i use?  any other things i'm missing?