Or try the 45 pilot with current clip position.
Jetting question, again...
Started by GoonSquadCRFx, Feb 12 2012 02:52 PM
35 replies to this topic
Posted 17 February 2012 - 08:22 PM
Thanks bud. The 48 is the right one. I took everything apart today and found the mistake. It was a mistake I made not checking myself 3x. I'm gonna stay w/ the 152, 48 and 4th for now because that was the spot on jetting I was at before I tried to go back down in the pilot bc of the JD kit I got. It just needed to be barley tweaked w/ the fuel screw @ 1/4 throttle. I fouled the plug w/ the 165 main i think and the bike burned up alot of oil for some reason. Its always real clean and full when I change it every 100 miles. It was in bad shape this time.
Posted 17 February 2012 - 08:24 PM
ramz, on 15 February 2012 - 10:50 PM, said:
The top of the needle is blunt and the clip position is number 1 and lean.
The bottom of the needle is the point and the clip position is number 7 and rich.
The bottom of the needle is the point and the clip position is number 7 and rich.
Ramz, while I have my sub frame up and looking into my carb, the linkage is missing the slide, but them hitting the side of the carb past it. Does it need to be adjusted, and if so how and where is the adjustment screw?
Posted 18 February 2012 - 07:50 AM
Note that the JD needles require much larger main jets than those for the NCVS needle due to the fact that the NCVS needle has much more taper (richer) from about 1/4 throttle to full throttle.
Also, I'm assuming that in the 1st post that the 1st needle change to lean the jetting was to move the clip from the 4th position to the 3rd position (counting from the top of the 7 clip position needle).
Also, I'm assuming that in the 1st post that the 1st needle change to lean the jetting was to move the clip from the 4th position to the 3rd position (counting from the top of the 7 clip position needle).
Posted 18 February 2012 - 08:46 PM
Yes, I started w/ the 4th from the top and went to the 3rd from the top. I'm gonna see what the 2nd does tommrow. I pulled it tonight after I rode all day and its actually a NCVT needle? I thought it was the NCVS, but I guess not. How much of a difference does that make now? I think this is a stock 06 250x needle...
Posted 19 February 2012 - 07:47 AM
The NCVT needle has a one step leaner base diameter than the NCVS needle, i.e. a little leaner from 0 to 1/8+ throttle.
Posted 19 February 2012 - 09:34 AM
This needle has given me nothing but grief since Ive had it. I'll try all 7 positions before I count it out. I'll see what happenes. Its pouring all day today, so I'll be able to change it, but not go test it.
Posted 20 February 2012 - 08:14 AM
Using the JD recommended jetting, we've had very good results. If there are some other issues, such as the AP squirt hitting the slide, that can't very well be blamed on jetting. Mixing JD settings and internet jetting advice is asking for a long lasting headache. JD has very good tech support if you call them on the phone.
The nice thing about the FCR carb is its so adjustable. The bad thing about the FCR carb is its so adjustable. It isn't rocket science but the basics have to be in good condition before any jetting/adjustments can be expected to work.
The nice thing about the FCR carb is its so adjustable. The bad thing about the FCR carb is its so adjustable. It isn't rocket science but the basics have to be in good condition before any jetting/adjustments can be expected to work.
Posted 20 February 2012 - 12:35 PM
I understand. I've learned that to. Today I adjusted the NCVT needle to the 2nd position since my bike seems to be running rich on the needle @ 3 and 4, and its perfect now. I adjusted the fuel screw again to max idle (1/3/4 out) and the bike is running flawless now. I hope it runs just as good if it gets cold again. I seem to have the extreme richness on the pilot and leanness on the needle for the bike to be where it needs to be, why is that? Is it just this needle? Its been tough to dial this thing in since I got it. The stock needle didn't give me any trouble. The main and pilot where easy to dial in. Then when I added the needle, its been a real challenge to jet.
Posted 20 February 2012 - 06:31 PM
You may need to try a smaller pilot with your richer needle setting. Glad you got it sorted Goonsquad!
Posted 21 February 2012 - 07:27 AM
Yea, well I wanted to use my 45. When I was trying to put it back in, it feel down in the abyss of the bike. And of course it just disappeared like everything else. Just last week I lost that jet, the alan bolt that holds the top of the carb on and the alan key I use to remove the carb alan bolts. I don't get it, how the bike just eats parts. I laid it over, stood it up, gave it shaken baby syndrome, everything and i didn't even hear a rattle or nothing!!! So pissed!! 
Posted 21 February 2012 - 07:58 AM
I'd get a 45 pilot and go from there. #6 clip position is richer than #4 and #5 position. What makes you say its running rich?
Posted 21 February 2012 - 08:26 AM
I just fouled a plug (super black and oily) and it had the gargle, not the bog... Is that correct or no?
PS: Sorry, I was counting the wrong way. I had it on 3 & 4 and was running rich, then I put it on 2, and that cleaned it up. Snappy and crisp, no bog, no gargle, nothing. Just super quick throttle response everywhere in the range.
PS: Sorry, I was counting the wrong way. I had it on 3 & 4 and was running rich, then I put it on 2, and that cleaned it up. Snappy and crisp, no bog, no gargle, nothing. Just super quick throttle response everywhere in the range.
Posted 21 February 2012 - 06:39 PM
Your lost jet likely is in the stock skid plate , just a few screws away, man! Try a 45 pilot with a 3 or 4 clip position on the needle(and proper fuel screw adjust).
Posted 21 February 2012 - 06:52 PM
I got an after market one!! lol. I cant get it off either. That thing is on there now. I figured thats where all my parts and tools are ha!
