[02Raptor660R]

very cool. that's like a $10 dollar fix. you think that's a good place to start and see where it takes me?

 

[1FST690]

Absolutely a good place to start. You need that tube to be there. Will it fix your problem? Not sure. but it definatly wont hurt :lol:

 

[02Raptor660R]

very good deal haha. im go for that and a carb clean and see what happens. when i pull the carbs ill check the boots too and see if there cracked at all. im hoping there not

 

[1FST690]

you need to bend out the ends ect to get the cracks to open up if they are cracked. I had one that would run ok till i reved it. when it reved the vibration opened the crack up but at idle it would purr like a kitten. so make sure you inspect them real good as well as the o-rings sealing the boots to the head.

 

[02Raptor660R]

its not the hose. i just didnt see it there until i pulled the plastics off. im pulling the carbs tomorrow morning so well see what story the boots hold ha

 

[1FST690]

Cool let me know what you find.

 

[02Raptor660R]

Cool let me know what you find.

Frank and others,

So heres what i found. I started to take the bike apart and all was going good. Then i found a tube that was dissconnected from between the two carbs. it was a rubber piece that came from the gap between the two carbs but i couldnt get the tube to fit it. maybe im missing a connector? i didnt know if that was my problem or not so i continued to take the carbs out. The boots arent cracked. they look to be in good shape actually. the carbs were seated in the boots good and the gaskets on them looked fine. So we took the carbs apart. there was some jelly like build up, im guessing from the bike sitting for the past 5 months or so. they really werent that bad though (Left side was worse than the right, mainly where the main jet is located). i took the jets out because you said you wanted to know the sizes. Heres how they go.

(Left side is the one where you dissconnect the throttle cable from, thats how i determined left and right)

Right Main: 148 (The last number was really hard to read but i would say it was an 8 but possibly a 5 or 6)
Right Pilot: 22.5

Left Main: 148 (This one was alot easier to read)
Left Pilot: 22.5
Other Jet (dont know the name): R and a square on top of the circle and 95 on the bottom

I know that elevation playes a roll in what the jet sizes need to be so i live in Hillsborough NJ. i found that the elevation is 85 feet. i may be wrong but thats what i found, someone might want to doubble check. i got the bike from a guy who literally lived on the beach. The quad had a white brothers exhaust and the airbox has 4 (1in) circle vents in it. there is also a chrome piece that the air filter slips onto in the airbox that says something on it but for the life of me i cant remember. its a two port airfilter. i hope that makes sense haha. if anone has an idea please let me know

-PJ

 

[Bruces_720]

Usually the jet sizes are two different sizes so ur right side main would be 150 and the left side be 148. When i had a header and pipe and air filter with no airbox i was running 150-152 i beleieve. What i would do is up the jets one set and stagger the numbers and then put a new plug in and run it through the gears and shut down the bike and check the plug to see how its burning if its too lean or too rich. Just sounds like a jetting issue to me. I would also drain the old gas and put in fresh. When u let the bike sit for an extended period of time u should put a fuel stabilizer in the gas so it doesnt turn bad like jelly in your carbs. :thumb:

 

[02Raptor660R]

Usually the jet sizes are two different sizes so ur right side main would be 150 and the left side be 148. When i had a header and pipe and air filter with no airbox i was running 150-152 i beleieve. What i would do is up the jets one set and stagger the numbers and then put a new plug in and run it through the gears and shut down the bike and check the plug to see how its burning if its too lean or too rich. Just sounds like a jetting issue to me. I would also drain the old gas and put in fresh. When u let the bike sit for an extended period of time u should put a fuel stabilizer in the gas so it doesnt turn bad like jelly in your carbs. :thumb:

in that case i think one jet is 148 and the other is 146. i have them labled at home so i will check once i can. the one was hard to read and like i said it could have been a 146 instead of 148. i may have just remembered wrong. i made sure to keep it all organized while i was taking them out though if your saying the bigger jet is always on the right side.

anyone else think think this can be the issue before i go and order new jets?

and what the difinite sizes should be?

Thanks for your help
-PJ:thumb:

 

[02Raptor660R]

im on dynojet now and the bigges jet size they sell is 146 and 148 for my quad and according to the website those are the sizes they say i should have on the quad. heres what they say:

If you are running the stock
exhaust use the DJ142 in the left carb and the DJ144 in the right carb below 3000 feet, DJ140 in the left
carb and DJ142 in the right carb from 3000 to 6000 feet and DJ138 in the left carb and DJ140 in the right
carb above 6000Feet. If you are running an aftermarket slip-on exhaust with a high flow baffle, use the
DJ144 in the left carb and the DJ146 in the right carb below 3000 feet, DJ142 in the left carb and DJ144 in
the right carb from 3000 to 6000 feet and DJ140 in the left carb and DJ142 in the right carb above 6000
feet. If you are running a full aftermarket exhaust with a high flow baffle, use the DJ146 in the left carb
and the DJ148 in the right carb below 3000 feet, DJ144 in the left carb and DJ146 in the right carb from
3000 to 6000 feet and DJ142 in the left carb and DJ144 in the right carb above 6000 feet. Be sure that
the jet you are changing is the main jet. work properly with
these in place.


sorry that copied so weird

-PJ

 

[1FST690]

Here is what I would do. I would leave the jets in it that are in it for now. Clean all of the jelly like junk out. make sure you clean the jets and passages real well. put it back together and see how it runs. And the 3rd jet in the left carb is for the choke circuit. I would also put in 25 pilots. try that and see how she does

 

[02Raptor660R]

Franks,

alright thanks so much. i was waiting to see what you would say because you've been guiding me through all this. do you recommend a site to order the pilots from?

again thank you,
-PJ

 

[1FST690]

I got mine from my local shop. they are just a mikuni jet. I think Jets r us is a good site but I havent ordered anything from them. How many clip positions are on the needles if you happened to look by chance?

 

[02Raptor660R]

I got mine from my local shop. they are just a mikuni jet. I think Jets r us is a good site but I havent ordered anything from them. How many clip positions are on the needles if you happened to look by chance?

I didnt get to the bottom of the carbs yet if thats where the needles are if there not then i'm not sure what your talking about. i got to the point where i could get you the jet sizes and stopped there

 

[1FST690]

the needles are accessed from the top. Take the screws out and remove the plastick top. under it will be a vacuum diaphram. remove it and inspest it for an cracking or tearing. Also take note when you pull the top off if the diaphram looks like it is not swelled ie not bulging out ect... Once you have that out of the way you will see a plastick piece in the center. use some needle nose pliers and pull it out. there is a sping under it. it may or may not come out with the plug. Under that is a shim/needle/another shim. I use the needle nose to pull the neelde and upper shim out. them if the lower shim doent come out. tip the carb over and they will come out. See how many clip positions there are and where the clip is. Also after that take a screw driver and screw the air screw in (bottom front of carb) screw them in until they just come up snug, not tight! counting the turns. unscrew them the same amount of turns and let me know what ya find.

 

[02Raptor660R]

ok yea i have my top and bottom mixed up ha. i took the bottom off to get to the jets but i didnt take the top off. i have it apart on my bar now ha. if you give me like twenty minutes i can probably take it apart and let you know

 

[02Raptor660R]

ok i have it apart. the clip is on the 4th notch down

 

[02Raptor660R]

and both the right and the left air screws were 3.5 turns out from snug. as if the screw head was a clock the right side was at about 4 and 10 and the left side was at about 2 and 8

 

[02Raptor660R]

this is what dynojet has posted on their website about pilot jets. i was looking on there to see if they would tell me what type i needed because jets r us gave me 8 different types of mikuni pilot jets and then the choice of genuine or OEM style (i think two of them look like mine so im still not sure what ones i need), but this is what they say:

This controls 100% of the engine idle and 25% of the transition onto the needle. Dynojet has found that the engine will idle with the standard pilot jet, with or without the air-box and with the slides and needles removed from the carburetors; therefore we never change the pilot jet. Doing so is proof that you are not using the other circuits correctly. Idle and off idle is controlled by the mixture screws and the float level which have the most positive effect below 4000 R.P.M. On some models the pilot air jet is changed to provide optimum fuel economy. Correct balancing of the carburetors also ensures a smooth idle.

 

[1FST690]

true you can use a stock pilot jet, but they generaly seem to start and idle a bit better with a slightly larger pilot. I am not much help on ordering them online as I havent done that. I might bump the mains up a tad. If it had DJ main gets now. try getting 155-160 mikuni jets. I dont really like the needle being on the 4th clip down, and the air screw being out so far. I would like to see it on the 3rd clip down and the air screw out about 2,2.5 turns which in order to do the mains will need to be a tad richer