Honda Silver Wing Scooter Forum

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Cosmic_Jumper
Site Admin
Cosmic_Jumper

Number of posts : 3747
Age : 78
Location : damn near Philadelphia, PA
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PostSubject: Re: MPG Transmission Mods   MPG Transmission Mods - Page 2 I_icon_minitimeSun Jul 27, 2014 10:32 am

Those RPM@MPH figures are lower than the traditional figures I've seen mentioned.

Given your Engineering background it's a real shame that you can't get hold of a set of Dr Pulley sliding weights. They do effectively alter the angle of the roller ramps. It would be nice to get your take on them.

Notwithstanding dyno testing and engineering equations, ultimately scooter riding is a seat of the pants experience.

Tim


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Chris Olson
Super Scooter Rider
Super Scooter Rider
Chris Olson

Number of posts : 220
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Location : Barron, Wisconsin
Points : 2768
Registration date : 2014-06-22

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PostSubject: Re: MPG Transmission Mods   MPG Transmission Mods - Page 2 I_icon_minitimeSun Jul 27, 2014 10:45 am

Cosmic_Jumper wrote:
Given your Engineering background it's a real shame that you can't get hold of a set of Dr Pulley sliding weights. They do effectively alter the angle of the roller ramps. It would be nice to get your take on them.

I'll have to compare with my wife's bike when I get a chance because I never did anything to hers.

I got a set of sliders in the variator on my Chinese scooter. If your original ramps and rollers are worn, then sliders are probably good idea because they renew performance without having to replace worn ramp or pulley half. I don't remember what the specs were on my Chinese scooter. The local scooter shop has a big tray with all kinds of rollers and sliders in it because people are changing them all the time in those Chinese rides. But he don't have any for Silver Wings.
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LDB
Maxi-Scooter Rider
Maxi-Scooter Rider
LDB

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PostSubject: Re: MPG Transmission Mods   MPG Transmission Mods - Page 2 I_icon_minitimeSun Jul 27, 2014 11:09 am

You get 5mph more speed for only 200rpm more engine speed? That's 25mph per 1000 rpm. At 8500 rpm redline that would put you north of 150mph starting at 65mph and 4600rpm.  confused 
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Chris Olson
Super Scooter Rider
Super Scooter Rider
Chris Olson

Number of posts : 220
Age : 61
Location : Barron, Wisconsin
Points : 2768
Registration date : 2014-06-22

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PostSubject: Re: MPG Transmission Mods   MPG Transmission Mods - Page 2 I_icon_minitimeSun Jul 27, 2014 11:17 am

LDB wrote:
You get 5mph more speed for only 200rpm more engine speed? That's 25mph per 1000 rpm. At 8500 rpm redline that would put you north of 150mph starting at 65mph and 4600rpm.  confused 

That's assuming the engine would make redline on a balls-out run (it probably won't).

I took the torque sensor pulley off this morning to lubricate the bearings in there (should've done this the other day, and have to do my wife's too). The needle bearing was fine, but that little ball bearing on the outboard end had spun all the grease out of it with time and needed repacked.

MPG Transmission Mods - Page 2 6EupjrUKuYeqDEhV32UOerejeBZIm6Dc1JtB4ix_LG4=w640-h480-no

It's too bad somebody doesn't make a full transmission "reprogramming kit" to change these things. It would be incredibly simple to do - either change the weight or springs in the clutch to make that engage when you want, and stay engaged at lower rpm. I managed to get some improvement in that with heavier rollers. But the place to do it is in the clutch.

And offer a kit with a different torque spring and roller weights to change the gearing profile to what the rider prefers. The rollers (or sliders) only accomplish half of what it takes to completely reprogram the gear ratio curve to either lower or higher ratios at a given engine rpm and road speed.
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bigbird
Silver Wing Guru
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PostSubject: Re: MPG Transmission Mods   MPG Transmission Mods - Page 2 I_icon_minitimeSun Jul 27, 2014 1:16 pm

I believe Dr. Pulley makes all that stuff with their HIT modifiable clutch and their different slider weights.
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Cosmic_Jumper
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Cosmic_Jumper

Number of posts : 3747
Age : 78
Location : damn near Philadelphia, PA
Points : 8703
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PostSubject: Re: MPG Transmission Mods   MPG Transmission Mods - Page 2 I_icon_minitimeSun Jul 27, 2014 5:45 pm

Malossi makes an upgraded Driven Pulley torque spring, as well as an assortment of "heavier" clutch springs for the OEM clutch and different roller weights for the variator.
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Chris Olson
Super Scooter Rider
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Chris Olson

Number of posts : 220
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PostSubject: Re: MPG Transmission Mods   MPG Transmission Mods - Page 2 I_icon_minitimeSun Jul 27, 2014 6:01 pm

My wife and I went for a 64 mile ride this afternoon. We checked fuel mileage just for the heck of it. Her bike turns 300 more rpm's at highway speeds than mine does and she STILL gets better fuel mileage with her bike that I get with mine. Mine figured out to 52.7 and hers figured out to 53.5.

I think I may have figured out the key to getting better fuel mileage - lose about 65 lbs. LOL!
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model28a
Silver Wing Guru
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model28a

Number of posts : 2090
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PostSubject: Re: MPG Transmission Mods   MPG Transmission Mods - Page 2 I_icon_minitimeMon Jul 28, 2014 2:09 am

Chris go do the same 64 mile run with you on her bike and her on your bike. See if you get better milage or equal after the switch.
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Chris Olson
Super Scooter Rider
Super Scooter Rider
Chris Olson

Number of posts : 220
Age : 61
Location : Barron, Wisconsin
Points : 2768
Registration date : 2014-06-22

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PostSubject: Re: MPG Transmission Mods   MPG Transmission Mods - Page 2 I_icon_minitimeSun Sep 21, 2014 11:30 am

Long term, and Sturgis/Yellowstone in August and a run to Alaska in early Sept, plus all my other riding gives me 12,200 miles on those heavier rollers.

My conclusion in the long term is that they did absolutely nothing to enhance fuel mileage or highway performance. They make the engine run at lower rpm before the transmission shifts to high ratio, which for me makes the bike more enjoyable to ride. I never rode my other bikes around town in 1st and 2nd gear and I don't like an automatic transmission that does either. So that part I like.

But for those searching for that elusive fuel mileage - it didn't do it. The Silver Wing is a heavy bike for a 600. But that weight, despite hurting fuel mileage some, is well balanced and part of what makes it one of the best long distance touring machines I have ever ridden. Breakfast on the opposite coast? No problem. Let's roll. The fuel tank could stand to be a bit bigger, but even that is not a big problem because I don't mind getting off to stretch my legs a bit every 2-3 hours anyway.

So that's my long term report on adding weight to my variator rollers. The one and only thing it did was lower the engine rpm's a bit for normal city riding, and more positively lock the transmission into high ratio for highway riding, which for me is a desirable thing.
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