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Post by sloagm on Nov 11, 2004 14:49:56 GMT -5
I just ordered my carb jet kit. Have bored out the airbox and it is presently taped to keep the mix in check. However, after reading the posts in some of the tuning sections I am now terrified that I will NEVER get my tuning to the point where I will have strong smooth acceleration throughout with a higher top end speed. I am not worried about the delimiter right now. I simply want better off the line and the ability to reach top end quicker. Once I have that, I'll worry about improving top end. I have not been able to really get smooth acceleration with any air intake taping combination since I bored out the AirBox. I am at 4700 feet and I know that the Ruckus is designed for Oxygen levels from Sealevel to 5000 feet. Is there any advice on this "Needle shimming" activity that everyone is talking about? Basically, I am now lost and not sure if any of this is going to be worth it. AAAAHHHHH!!!!
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Post by Ruckass on Nov 11, 2004 16:42:13 GMT -5
I would say get lighter roller weights for faster off the line speed. 5.5 or 6 or....a combination of the two sizes. As for jetting and shimming I wouldn't go too high with the jet yet as you havent done much else to your scoot. I'd try an 85 maybe an 80. As for shimming, look on this site and the battlescooter site for better intructions on how to do it. I thought it would be hard but it aint. Once you've got it apart its pretty obvious if you refer to the pics on the battlescooter site or if you have the service manual. Look for small washers at an electronics shop, (they seem to have the smallest ones). bring the vacuum chamber with you to help find the size.
Ruckass
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Post by abe on Mar 8, 2005 6:41:57 GMT -5
Dandy can always help you. He was new to jetting and now he's a pro(I'll still keep my eye on him for you)
I'm not trying to sell a CDI but if you do get one the jetting will be a lot easier.
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Post by Dandy Dan on Mar 9, 2005 18:08:40 GMT -5
Yeah if anyone has questions just ask! I've spent SO much time pissing with the carb but I've finally got it dialed. I think I'm a good person to ask cuz every stupid question you may have I've probably wondered myself. I had to ask my brother to point out where the carb was intially.
Now my Ruckus runs great right through the RPM range. I'm running a 90 main jet in the winter (temps below 0C or 32F) and an 85 in the summer along with some fancy shimming for my wide open stock airbox.
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Post by Ruckass on Mar 9, 2005 22:31:30 GMT -5
What did you use to shim with? I found some TINY washers at an electronics shop that fit in the space almost perfectly but arent thick enough. Mine are probably .5mm
I know I could use a thicker one (at least a 1mm maybe a 1.5mm
Ruckass
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Post by Dandy Dan on Mar 10, 2005 11:26:09 GMT -5
I took a beer cap. Scraped off the rubber coating on the bottom, leaving me with a thin layer of metal. I think took an awl and slowly made a hole the exact width of the needle. Then I cut out the hole so I had a tiny perfect fit washer. I ended up using two of these. But I had to cut the white/clear plastic piece down a bit so I could fit em in.
Using more than 1 washer isn't a problem to get the thickness you need so as long as the ones at the store fit nice you should be in luck.
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Post by Dandy Dan on Mar 10, 2005 11:37:59 GMT -5
I think I settled on a total shim width of about 2.1mm. With out cutting down the plastic piece (I used a jackknife) you could maybe fit 1.5mm of shims in.
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Post by abe on Mar 11, 2005 6:00:20 GMT -5
The thing to remember is that this is for Dan's scoot. You could need different jetting. It's a great place to start, but it's only a start if you want your scoot as fast as possible ;D
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Post by Ruckass on Mar 11, 2005 10:03:33 GMT -5
I think I settled on a total shim width of about 2.1mm. With out cutting down the plastic piece (I used a jackknife) you could maybe fit 1.5mm of shims in. What plastic piece do you speak of? Ruckass |
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Post by Dandy Dan on Mar 11, 2005 16:47:23 GMT -5
ADD VERSION:
Go to battlescooter.com -> tech -> intake/ignition -> find "NEEDLEJET" heading (Jetting section) -> the piece is in the first pic along with the needle and a shim
LONG VERSION:
You want to take off the top of the carb by removing 2 philips screws. Then you can lift out the black rubber diaphram along with a grey sleeve and the needle inside that (needle is sticking out the bottom) (for a pic go to battlescooter.com -> tech -> intake/ignition -> scroll down under jetting to 'NEEDLEJET' heading) the picture right above the heading is what you are lifting out of the carb.
You don't want the needle to stick as far out of the bottom of this so you need to add shims to lift the needle up. The picture right below the heading shows the white plastic piece in question, the spring sticking out the bottom and the needle. If you look down the grey tube (as seen in the first picture) you'll see the white plastic piece. To remove it just take a star (philips??) screwdriver, PUSH DOWN and turn counter clockwise.
The plastic piece has fins kinda on the bottom and there are ledges kinda in the grey piece that you slide the fins under to hold the piece there. The spring provides tension so the friction keeps everything in place. It's really not that difficult. You just need to push down and turn and it pops out. (make sure your screwdriver fits good cuz it's soft plastic and easy to strip, you need a pretty small screwdriver). The problem is that if you add a bunch of shims on the needle you can't push the white plastic piece down far enough so that the fins slide under the ledges. The solution is to shave the fins a bit thinner. The fins are only maybe 2mm thick and you could maybe shave them down as low as 1mm.
It's not hard to put back together...I suggest just taking it apart and having a look. I'd take the white plastic piece out and practice putting it back in once or twice before I'd try it with the shims in there just to get the feel of it. The hardest part of the whole operation is getting the black rubber diaphram seated properly while you screw the top cap back on. (A tip is to leave it up, get it seated, then push it down and put the screws in.
I know I made it sound really confusing but there's really nothing that can go wrong....except losing the spring. I dropped mine on some carpet and spent over and hour finding it. Just take it apart and it'll all make sense.
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Post by CTRukus on Mar 15, 2005 21:38:08 GMT -5
So, I'm starting my research now....
What do I need to do, first, to increase power at higher RPMs? I guess I mean to ask, create some sort of "passing-other-cars range".
Or should I just go through the whole mod list and get everything done? BTW, this will be happening next winter when I can't bear the -10F temperatures....
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Post by Ruckass on Mar 17, 2005 1:23:10 GMT -5
Hmmm, I didnt carve the plastic piece when I put mine in, perhaps I should. Then again, I'm thinking of just swapping the carb for a bigger one.
Ruckass
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