getting an exhaust, need help

[gsxrkneedragger]

i ordered a yoshi rs-3 full system the other day. i still need a jet kit. i'm going to try to find a 400ex intake boot and rig that up. i have a k&n filter. what i'm asking is that i know that taking the lid off helps a lot with air flow, but what could i do to help keep water and mud out. i know i won't be able to stop it completely but something to help. also, where should i start at jetting? i have no idea about that stuff so any help would be great. i'm between 500-600 ft. above sea level. and its cold, but i don't ride it much in the winter if that even would make a difference. thanks in advance

[288sunny]

The guy that did mine, put a 160 in it and it ran awesome, im gonna have to say somewhere's right in that area will work.
Im at sealevel! i also put the yoshi full exhaust on.. awesome pipe!@

[ADTR14]

For water/ mud protection you have a few options. The ones i know are:

1. outerwears cover for the filter (pretty basic and something i would not count on if i did lots of mud riding/water crossings)

2. K&N power lid (to my understanding its a lid that is also a filter but im not sure if its water proof)

3. EHS lid (is a lid that uses an outerwear to cover the airbox)

The EHS lid is something ive always wanted, but i don't really need it for the riding that i do. They are supposed to allow just as much air as an open airbox while still giving you water/mud protection. They also look to be good quality.

[airmobile101]

Originally posted by gsxrkneedragger
i ordered a yoshi rs-3 full system the other day. i still need a jet kit. i'm going to try to find a 400ex intake boot and rig that up. i have a k&n filter. what i'm asking is that i know that taking the lid off helps a lot with air flow, but what could i do to help keep water and mud out. i know i won't be able to stop it completely but something to help. also, where should i start at jetting? i have no idea about that stuff so any help would be great. i'm between 500-600 ft. above sea level. and its cold, but i don't ride it much in the winter if that even would make a difference. thanks in advance
If you plan on riding in wet conditions, mud or whatever, just leave the lid on. You can buy those Uni inserts that you drill holes for and put those on top of the lid. Now I do run a K&N power lid and it does come with the waterproof prefilter. Water still gets into my box. I drilled a hole at the bottom of mine so water can drain better than the stock location. The stock drain location isn't at the lowest point in the airbox if you look.

[rcatvrider]

With a bit of time and a couple of tools you can make an outerwears airbox lid like I did for my 400ex.
http://i132.photobucket.com/albums/q16/tamiyakid/400ex/newcam024.jpg

[gsxrkneedragger]

rcatvrider, how did you do that and what all would i need to buy. thanks for the pic. how does it help with some water and mud? thanks.

i took the float bowl off today and found i have a 130 main and a 60 pilot. where would you guess i should start jet wise with the stuff i have now? thanks

[airmobile101]

60 pilot???

[cataway]

ya he's looking at the wrong jet , the jet your looking for should have 22.5 on it . most guy's change that jet to a #25 ,well after enough mod's have been done , keep looking .

[rcatvrider]

Originally posted by gsxrkneedragger
rcatvrider, how did you do that and what all would i need to buy. thanks for the pic. how does it help with some water and mud? thanks.

i took the float bowl off today and found i have a 130 main and a 60 pilot. where would you guess i should start jet wise with the stuff i have now? thanks
You will need the bolts, locknuts for the other side, an outerwears airbox lid(around 20 bucks), and a piece of 1/8" or slightly thinner aluminum sheet, I actually used an old road sign. I then marked it all out, and cut the metal with a jigsaw and drilled the holes with a drill press. Then it's as simple as laying out the filter and cutting it with a sharp exacto knife. I screwed up washing it before and forgot to get any water off the prefilter. When I took the seat off the next day there were puddles of water on it and only a few drops of water in the airbox so I would say it it does pretty well in water/mud. The trails I ride are very wet/muddy so i also needed some added filtration.

[gsxrkneedragger]

rcatvrider, do you also have a prefilter for the actual airfilter or just use that? and where did you get that at?

airmobile and cataway, what is that jet then? i was looking at my manual and thats what i thought that it was. i guess i looked at the wrong thing. haha. also, since i'm just doing an airfilter, jet kit, full exhaust, should i go up to a 25 with just that? any idea where i should start with the main jet. i was looking at dyno jet's website and i think the stage 2 is a 150. would that be right?

[rcatvrider]

I got the outerwears at www.magicracing.com . I'm running a uni filter with no prefilter, just that airbox lid.

[cataway]

Originally posted by gsxrkneedragger
rcatvrider, do you also have a prefilter for the actual airfilter or just use that? and where did you get that at?

airmobile and cataway, what is that jet then? i was looking at my manual and thats what i thought that it was. i guess i looked at the wrong thing. haha. also, since i'm just doing an airfilter, jet kit, full exhaust, should i go up to a 25 with just that? any idea where i should start with the main jet. i was looking at dyno jet's website and i think the stage 2 is a 150. would that be right?
of course it depends on well it runs ,first you should see if you can make it run better by adjusting the fuel screw ,if you find you need to turn the screw out more than 3 1/2 turns then yes go to the #25
with no more than what mods your talking a #145 mj should be right , i'm not a fan of DJ jets.

[gsxrkneedragger]

cataway, why are you not fond of dyno jet kits? i was looking at them because they come with a new needle, clip, spacer, all that stuff. and a bunch of different size jets. what other kits would you suggest? thanks

[airmobile101]

Im not big on dynojet either. It can be quite confusing when talking about jetting and one person is thinking jetting by Mikuni standards and the other is thinking Dynojet.

Now, the 60 jet is for your choke circuit(so I think). You only have one other jet in there besides the 130 and 60, and that would be your pilot(22.5). Now, you can adjust the pilot circuit, but your gonna have to remove the brass plug thats blocking it. That plug is on the outside of the fuel bowl. Youll notice a brass plug if you flip the carb over. I drilled the plug out. Actually the drill pulled the plug out,so you don't want to be pressing super hard or anything when drilling.

Also, Alba has a jet kit for yea. Little pricey for what you get,but this will for sure put yea in the right direction.

http://store.albaaction.com/shop/LTZ-JKIT.html

[gsxrkneedragger]

airmobile101, if its just those 2 jets and needle, couldn't i just go to the dealer close to me and pick up a 150 main and 25 pilot? whats the difference between the needle that comes with that kit and the stock one i have now? i'm thinking i could get the main jet for like $5.

cataway said that a 145 jet should be fine for me. is there a big difference in the 2 sizes?

what your saying about dynojet, do they not have the same numbers like 140, 150, etc? also on my carb, the jets that are in it have a square within a square if that makes any sense.

[cataway]

Originally posted by gsxrkneedragger
airmobile101, if its just those 2 jets and needle, couldn't i just go to the dealer close to me and pick up a 150 main and 25 pilot? whats the difference between the needle that comes with that kit and the stock one i have now? i'm thinking i could get the main jet for like $5.

cataway said that a 145 jet should be fine for me. is there a big difference in the 2 sizes?

what your saying about dynojet, do they not have the same numbers like 140, 150, etc? also on my carb, the jets that are in it have a square within a square if that makes any sense.
here is a chart that compares the different makes of jets
KEIHIN, DYNOJET, MIKUNI


140 130 122.5
142 132
145 134 125
148 136 127.5
150 138 130 this would be the stock main jet that came in your carb
152 140
155 142 132.5
158 144 135
160 146 137.5
162 148
165 150 140
168 152 142.5
170 154 145 this is the one i suggested
172 156
175 158 147.5
178 160 150
180 162 152.5
182 164
185 166 155
188 168 157.5
190 170 160
192 172
195 174 162.5
198 176 165
200 178 167.5
202 180
205 182 170
208 184 172.5

[cataway]

as i recall all this chart did was compare the hole size in the jets .
i never actually tested to see if in fact its true.

[airmobile101]

Originally posted by gsxrkneedragger
airmobile101, if its just those 2 jets and needle, couldn't i just go to the dealer close to me and pick up a 150 main and 25 pilot? whats the difference between the needle that comes with that kit and the stock one i have now? i'm thinking i could get the main jet for like $5.

cataway said that a 145 jet should be fine for me. is there a big difference in the 2 sizes?

what your saying about dynojet, do they not have the same numbers like 140, 150, etc? also on my carb, the jets that are in it have a square within a square if that makes any sense.
For sure !!! Just head on down to the dealer and get them. Just make sure they are true Mikuni jets. I had bought jets before from a dealer and they were knock offs. I do have a Dynojet kit Ill sell yea if interested. Its not complete, but its got everything you would need. I do think the dynojet needle's taper is a little thinner,but Im not 100% sure.

Oh, the square within the square is Mikuni's trademark. Just make sure any other jet you get has the square within the square.

[gsxrkneedragger]

thanks for the info so far. should i get a different needle, or will the stocker one be fine? how far would you guess that i should turn the air screw out? right now being stock, its 2.5 out.

airmobile101, how much would you want for that kit? and what all is still in that you didn't use? thanks. my zip is 17009 if that helps.

[airmobile101]

Originally posted by gsxrkneedragger
thanks for the info so far. should i get a different needle, or will the stocker one be fine? how far would you guess that i should turn the air screw out? right now being stock, its 2.5 out.

airmobile101, how much would you want for that kit? and what all is still in that you didn't use? thanks. my zip is 17009 if that helps.
The stock needle is none adjustable,so you would definately need a new needle. Ill check when I get home in the morning to see whats missing in the Dynokit. Im pretty sure the needle and clip is still there. Im thinking $25.00 shipped?

[airmobile101]

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