I have a 2008 with Diablo's and 17,000 miles on it with an over size windshield and a drilled out air box and leg deflectors.

Before installing a new belt Dr. Sliders, 26g, Ride On tire balance and a bottle of fuel system cleaner I was getting only 45.5 mpg on a flat road going no more than 65 mph. Now after the changes I am getting a true 55.5 mpg. That is a 10 mpg increase in gas millage.

While checking my mpg I also checked the rpm difference before and after installing the sliders.

At 60 mph I was running 4900 rpms and at 50 mph. 4000 rpm.

With the sliders installed I ran 4500 rms and at 60 mph and 5000 rpm. at 70 mph.


It runs smoother from 40 mph. accelerating all the way the power band than before and I am back up to 105 mph on the flat ground.

I don't care if you think ridding that fast is stupid or not. I ride like I stole the bike, and for what I paid for it, I did.

The nice thing about any weight of Dr. Pulley sliders is their lowering of highway cruising rpm. The Swing engine really drinks down gasoline once you run it over 5k rpm.
I'm running the 24gr sliders. Their cruising rpm is the same as yours. The difference is in the acceleration at around town speeds. I've tried the 28gr, 26gr, and 24gr.

I am running the 22 g sliders and I average around 55 mpg in summer, but in the winter when they make us use the 10% ethanol fuel it drops to 51mpg or so. The accelleration is very strong, but I think I dropped a couple of mph off the top end. The highest indicated speed I have been able to observe is 111mph. Before the sliders I could hit 115mph.

Bill:
The "drilled out air box" refers to drilling several 1" diameter holes in the plastic cover to the air box. This allows more air to enter the engine. The idea is to allow the engine to breath more easily. It really only makes sense to drill the air box if you also put a free flow exhaust on your bike and a high flow air filter. If your bike has the O2 sensor on the exhaust (2008 or later), make sure the replacement exhaust also has a place to attach the sensor. It seems to help the engine run more efficiently. Your mpgs seem pretty low. I would look at replacing the air filter with a high flow filter (K&N). The air intake is under the right side tupperware panel towards the front of the seat. Someone has posted photos of how to access it. I have the K&N air filter, a driller air box, and the Leo Vince exhaust. I also have a power commander that was dyno tuned for my altitude. I like the mpgs I get and I do not drive like a guy who is trying to get good mpgs...

Thanks Scootist,
By the tupperware panel near the front of the seat I take it you mean the middle's textured black plastic and not the colored body panels. I have been unable to find the procedure in the pictorials section...Okay, scratch that--I've just found it.
And which fuel additive were you using again?

Bill:
I just add a little STP gas treatment every other tank or so in the winter. It seems to help keep things running smooth and crisp. Without it the engine seems to fire a little bit "mushy" after a few tanks of that ethanol crap.

I bought the most expensive fuel system product I could find. Only used a 1/4 of the bottle and the rest went into my truck. I also have the K&N air filter. Expensive but you only have to buy one

For those of you who have drilled holes in the airbox: did you notice any diff in sound of the engine? I ask, because on some machines, you get feedback noise from the motor. I think thats part of the reason mfg's build such large covered air boxes.

I still don't think you would have an intake air limitation requiring drilling the air box, even with a low restriction exhaust system. The intake and exhaust porting would still be your limiting restriction. If you were turbo or supercharging, that would be a different scenario. Unless someone has done an airflow or dyno test with a stock and then drilled air box, this is one of those hypothetical situations.
Drilling the air box would just result in more intake moan IMHO, not necessarily more power.

I have replaced my drive belt at 18000 miles and now at 24000 smiles. So, in view of that I do know how it all works but, when you talk about the different weight "sliders" which do you recommend and are they referred as that in the maintenance manual? I do need to improve my gas mileage somehow. We are at 3965 altitude but do go to Wyoming and Colorado on rides with altitudes of 12000 feet. Also where can you purchase this "package"? I do not want to drill holes or replace the exhaust system. I like to keep it as stock as possible but would replace the needed drive components. Thanks in advance for the info.
Old Dave in Western Nebraska

Ulflyer:
I would say drilling the air box did cause a slight change in the sound of the engine and personnally, I like the change. It seems to have a bit more of a raspy note to it along with a little more cowling howl at certain rpms.

Dave:
I started with the 26g sliders and liked the improvement in accelleration as well as the fact that I was getting as much as 59 mpg (my average was more like 55 mpg). Then I switched to the 22 g sliders and got even better accelleration (which is useful climbing hills here in Colorado) and it didn't seem to hurt my mpgs. I still average about 55 mpg in summer and in winter it drops to about 51 mpgs. (I think it is due to the 10% ethanol gas)

Thanks for your reply. Where did you order them from and what was the $ factor? My daughter and her husband live in Littleton. Would like to ride with you sometime. Come on over.....

Dave:
I ordered them from Monster Scooter Parts. They cost around $60 or so. Let me know when you are in town and maybe we can go for a ride. That would be fun.
D

The Scootist: Any interest in selling the 26g sliders? Sounds like something I might be tempted to try on the Wing. If so, shoot me an email.

Scootist,
How can I contact you?
Dave R

Why did you go from the 26 . . . sounds like you had good performance.
Dave R

Dave:
The 26 g sliders were better than the stock Honda rollers, but the accelleration wasn't quite as good as I had with the J Costa Variator. Using the 22 g sliders the accelleration is really close to what I had with the J Costa. When you consider that with the 22 g sliders my mpgs are still in the 51 to 55 mpg range, the sliders are a far better option than the J Costa.

I received my 26g Dr Pully sliders and installed them yesterday afternoon. We rode today 225 Smiles weather was nice very little wind. I really liked the performance but could not say I noticed any fuel improvement. I did notice at 65 on the GPS it was running 5000RPM. Is this about what it should be? Seemed like I was turning about 500RPM less in the cruise range but when I filled with gas it used just as much as always. What do I need to check? I really could not give it a true check as I had intended because the fellows I was riding with were going 'fast'. Top speed on the GPS was 99.8 MPH. Think we passed everything on the road. I was also using 85 octane Gas no Ethanol.
Dave

I did go for a run of 124 miles with the 26g Dr Pully Sliders installed. Was satisfied with the performance but did not realize a change in mpg. "We" rode pretty agressively though. I did notice a 500rpm drop though so that should mean better mpg. Will check it again. Sounds like I may need to go to the 22g sliders. What do you think?
Old Dave

Thank you very much for answering my question Bigbird. That is what I needed to know. I like how my Silverwing performs now and I think when it warms up I will notice an increase in mpg. Right now we are operating in cold weather and I am pretty agressive.
Old Dave

I've always gotten only from 40-45 mpg here. My ride to work is 12 mi round trip with about four stop lights and speed limits between 35 & 55 mph. Mileage improves in the summer, now I'm in between at 42.5 mpg. I'm hoping that DP Sliders will help. Of course, it'll take time for the gas savings to off-set the cost, particularly if someone else does them. Still I'm committed to getting them, for the gas savings and improved acceleration.
Tell me though, which seems like a better option for my situation? 24 or 26 gram? I lean toward 24, but would I get enough of a gas savings to keep me happy (53-55mpg) or would I have to go with 26 grams and only get a slight acceleration over stock?

OK I am going to get the 22 sliders,... My swing is for fun and the sun, so losing a few mpg will not hurt me... BUT i am a BIG boy... 300lbs in my b-day suite LOL.

Will the 22 be good for me or 24... I want faster acceleration, but i dont want it to lurch (like poping a clutch) feeling when i am in rush hour traffic or while carving a canyon and in full lean in a corner.....

I keep reading about HyperPro springs...will this help me? in what way? I have my factory spring set to 5, firmest i believe because even solo, my weight is like 2 up riding.

Advice? Thanks.

got 24 and not even close to jcosta, anyone still looking for pins?Not too many places have them.

Just my 2¢, you can also try mixing slider weights. The 22g's offer fantastic accelleration but limit the top end. The 28gs offer stock weight and stock performance but smoother operation. A friend did some experimenting on his SW and suggested I mix the weights. I run 4 22gs and 4 28g sliders (every other slot). This combo results in quicker (not head snapping) take offs, a smooth transition thru the power band.

I know this thread is about MPG's so my comment is this. Before sliders it was horrible. During this series of mods I changed spark plugs and air filter also. Science tell us to only change one variable and measure the results. No numbers crunched or recorded but some general conclusions are the bike runs smoother and the performance is not sluggish at all. My MPG's went from 45-47 to a wopping 55-58 mpg. Like most I do not ride to squeeze mpgs but the scooter (and I) certainly enjoyed the changes!

Masscoot,

Great thinking.

I was thinking the same for some time now. 50/50 weight change. I was thinking 26g and 22g as a combo.

Would you like to sell your other (4) 22g silders?

I had the 22g sliders and it gave a bit more acceleration than the j costa, IMO. And then I think I sold them to Paul and bought the 28gr sliders. I kind of like the easy going ride now with the 28 gr but if you want more acceleration than mixing the 2 weights would be good or getting the 26gr would do it to.

I still need to clean out my K&N and also change/clean my plugs for general maintenance. It has been awhile. My mileage generally averages at 50 mpg. For those getting in the low 40's..you may want to take it to the shop and have them adjust the 2 air/fuel mixture screws. I mistakenly turned one of them and my mpgs' did go down a bit so I'm thinking of taking it to the shop to have them adjust it properly. I know I could buy the tool but for this I would rather have them do it.