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Post by redryder on Nov 11, 2008 14:30:09 GMT -5
I have an '03 Ruckus. I replaced 3 of the stock rollers with 5g rollers, for 6.25g total. I also had the drive face boss (spacer) machined down to 35mm. The only other performance mod is that I replaced the stock air filter cartridge with a Honda lawn mower filter cart. I cruise about 37-38 mph on flat roads (no hills here) and have a small, but noticeable, acceleration improvement. My question is this: Would a Polini or other aftermarket variator with 6g weights make any significant difference in performance over what I've achieved with my current set-up? Thanks.
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Post by Kami no Chiizu on Nov 11, 2008 21:39:37 GMT -5
I dunno, but with my otherwise stock '04 with a polini and 6g weights, I have no trouble riding 39 on the (windless) flats.
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Post by countzero94609 on Nov 14, 2008 1:56:14 GMT -5
I don't think there are "best" mods. All modifications are trade offs on some level. What do you want to do with your Ruck? Speed, longevity, carrying stuff, style?
It all depends on what you like. Look at a lot of modified Rucks and try the stuff you think you will like. If it doesn't work out, sell it and try something else.
Buying used parts is a good way to save money on some stuff.
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Post by redryder on Nov 15, 2008 13:12:36 GMT -5
I dunno, but with my otherwise stock '04 with a polini and 6g weights, I have no trouble riding 39 on the (windless) flats. Thanks. At least now I know that I won't loose any performance if I install a Polini. I'm just rying to decide if there will be enough improvement over my current set-up to justify the trouble and expense of switching variators.
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Post by smartbomb on Nov 16, 2008 23:34:12 GMT -5
Here is a formula for getting to 50 mph with the stock motor, no internal work, no cam change, real simple. I do it, I am a 200 lb fatty with wide shoulders so I am not too aero either. So if it works for me, it should work for most others unless they are really heavy or big.
1. Posh CDI, your really need this to get the revs to go that fast. 2. Bowls PC 20 carb kit jetted correctly with big K&N filter. 3. Some sort of good exhaust with correct jetting. Some exhausts with small primary tubes might not do it. JDM Yoshimura is pretty big. 4. Polini variator with 6 gram weights. Polini is bigger than stock with a higher gear ratio. 6 grams work for me but you might have to tune for your weight. I like Dr Pulley weights, they have smoother operation, no flat spotting and a little bit better low speed acceleration But regular roller work just fine. 5. Blue clutch springs from battlescooter 6. Light flywheel from JCR 7. 10w30 Synthetic racing oil with the level on the low side of the dipstick. 8. A Daytona Kevelar belt gives a lower first gear ratio if you will because its thin and sits all the way down in the variator. Obviously a worn belt screws up your high gear ratio.
You don't really need 5,6 and 8 to go 50 but you get there faster with them. 1-4 are important as is the no cost 7. Proper tuning is important as well. This is no bullshit and will work without costing megabucks unless you are bigger and fatter than me.
This is what I have done and I ride the fast main streets around here in traffic and am not confined to the right lane. I have the fastest stock long block ruck in my immediate area (although some of the SGV ones are proably faster).
Chanito, I think you could hit 50 and beyond consistantly if you tried a PC20 and a bigger exhaust.
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Camokid
Junior Ruckster
5 - 0
Posts: 70
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Post by Camokid on Nov 19, 2008 21:06:48 GMT -5
Anyone know where i can get an intake pipe that fits the stock carb. looking to spend about $30
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sr50r
Ruckster
Posts: 281
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Post by sr50r on Nov 19, 2008 22:09:07 GMT -5
Hey smartbomb, you seem to know your way around a carburetor and I think I've seen you mention the PC20 possibly wasn't the final solution. (or was that somebody else?)
Anyways, I'm gonna BB the sister's bike and while she wants to keep the stock carb, I'm doing some research on the side for a better solution. Long story short, what do you think of the Dellorto PHVA 17.5? it's a teensy bit smaller than the PC20, meaning faster air velocity meaning better atomisation, and well, ELECTRIC BY-STARTER YEAH!!!!!!
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Post by Dandy Dan on Nov 20, 2008 0:35:21 GMT -5
1. Posh CDI, your really need this to get the revs to go that fast. 2. Bowls PC 20 carb kit jetted correctly with big K&N filter. 3. Some sort of good exhaust with correct jetting. Some exhausts with small primary tubes might not do it. JDM Yoshimura is pretty big. 4. Polini variator with 6 gram weights. Polini is bigger than stock with a higher gear ratio. 6 grams work for me but you might have to tune for your weight. I like Dr Pulley weights, they have smoother operation, no flat spotting and a little bit better low speed acceleration But regular roller work just fine. 5. Blue clutch springs from battlescooter 6. Light flywheel from JCR 7. 10w30 Synthetic racing oil with the level on the low side of the dipstick. 8. A Daytona Kevelar belt gives a lower first gear ratio if you will because its thin and sits all the way down in the variator. Obviously a worn belt screws up your high gear ratio. You don't really need 5,6 and 8 to go 50 but you get there faster with them. 1-4 are important as is the no cost 7. I dunno....a stock new Ruck does 41-42mph normally and with a Polini you can add a couple mph and do 42-44mph normally. Some Ruckus owners report faster but 43-44mph is a good expectation for a new Ruckus with a Polini. Now since CDI's don't add any power, your formula basically requires that the PC20 carb and exhaust add enough power to take you from 43mph up to 50mph. That sounds more like a best case scenario than a realistic expectation to me I think a properly tuned Ruckus with your formula would be good for 45-47mph and you've just got an abnormally good performer. I've never tried a PC20 carb though, so I shouldn't talk too much. If I was going to do this, I would grab myself an imitation Keihin carb off ebay for $50-$70, buy the Ruckus manifold for $85 (pricey, someone should make a cheaper one) and then use the stock throttle cable with some modification and connect that up to the stock airbox with an opened snorkel. Unless you are going for the clean look, I like the idea of keeping the airbox because it offers more protection from the elements than an a K&N style filter. What jetting combo are you running with the PC20? And how's your honest milage?
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Post by Dandy Dan on Nov 20, 2008 0:38:23 GMT -5
Hey smartbomb, you seem to know your way around a carburetor and I think I've seen you mention the PC20 possibly wasn't the final solution. (or was that somebody else?) Anyways, I'm gonna BB the sister's bike and while she wants to keep the stock carb, I'm doing some research on the side for a better solution. Long story short, what do you think of the Dellorto PHVA 17.5? it's a teensy bit smaller than the PC20, meaning faster air velocity meaning better atomisation, and well, ELECTRIC BY-STARTER YEAH!!!!!! The stock carb is an 18mm CV carb, that should flow about as well as a 16mm slide carb. Accordingly, the 17.5mm Dellorto carb might be a bit to close to stock to get a decent improvement. Switching carbs is a fairly big hassle so you gotta make it as worthwhile as you can. I would get something like this, an imitation 21mm Keihin carb for $70. I've used this on a few scooters and they're good. You can also get them in 24mm. I got my 21mm for my last scooter for $65 including a reed cage and intake manifold. You might be able to find just the carb for $50. cgi.ebay.com/ebaymotors/OKO-21mm-RACING-CARB-FLAT-SLIDE-CARBURETTOR_W0QQcmdZViewItemQQcategoryZ43977QQihZ019QQitemZ290276275379QQrdZ1QQsspagenameZWDVW
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Post by smartbomb on Nov 20, 2008 11:16:17 GMT -5
Hey smartbomb, you seem to know your way around a carburetor and I think I've seen you mention the PC20 possibly wasn't the final solution. (or was that somebody else?) Anyways, I'm gonna BB the sister's bike and while she wants to keep the stock carb, I'm doing some research on the side for a better solution. Long story short, what do you think of the Dellorto PHVA 17.5? it's a teensy bit smaller than the PC20, meaning faster air velocity meaning better atomisation, and well, ELECTRIC BY-STARTER YEAH!!!!!! The Delorto would be the same size as the stock carb, perhaps a 19mm PHVB might work pretty good but it is way expensive compared to the Kehin. I would like to try a mikuni, it probably works better at tip in, the PC20 has a hard to tune out bog.
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Post by smartbomb on Nov 20, 2008 11:19:15 GMT -5
1. Posh CDI, your really need this to get the revs to go that fast. 2. Bowls PC 20 carb kit jetted correctly with big K&N filter. 3. Some sort of good exhaust with correct jetting. Some exhausts with small primary tubes might not do it. JDM Yoshimura is pretty big. 4. Polini variator with 6 gram weights. Polini is bigger than stock with a higher gear ratio. 6 grams work for me but you might have to tune for your weight. I like Dr Pulley weights, they have smoother operation, no flat spotting and a little bit better low speed acceleration But regular roller work just fine. 5. Blue clutch springs from battlescooter 6. Light flywheel from JCR 7. 10w30 Synthetic racing oil with the level on the low side of the dipstick. 8. A Daytona Kevelar belt gives a lower first gear ratio if you will because its thin and sits all the way down in the variator. Obviously a worn belt screws up your high gear ratio. You don't really need 5,6 and 8 to go 50 but you get there faster with them. 1-4 are important as is the no cost 7. I dunno....a stock new Ruck does 41-42mph normally and with a Polini you can add a couple mph and do 42-44mph normally. Some Ruckus owners report faster but 43-44mph is a good expectation for a new Ruckus with a Polini. Now since CDI's don't add any power, your formula basically requires that the PC20 carb and exhaust add enough power to take you from 43mph up to 50mph. That sounds more like a best case scenario than a realistic expectation to me I think a properly tuned Ruckus with your formula would be good for 45-47mph and you've just got an abnormally good performer. I've never tried a PC20 carb though, so I shouldn't talk too much. If I was going to do this, I would grab myself an imitation Keihin carb off ebay for $50-$70, buy the Ruckus manifold for $85 (pricey, someone should make a cheaper one) and then use the stock throttle cable with some modification and connect that up to the stock airbox with an opened snorkel. Unless you are going for the clean look, I like the idea of keeping the airbox because it offers more protection from the elements than an a K&N style filter. What jetting combo are you running with the PC20? And how's your honest milage? The CDI is needed because you run into the rev limiter trying to hit 50. I run a 80 main, a 50 pilot and put the needle in the highest richest position. My mileage runs between 95-105 mpg and most of my riding is horrible for mileage shot hop rides as I use the ruck for all of my in town, non-freeway errands. My SR50 Aprilia is more consistant, it seems to get a steady, 105-110 mpg no matter what. The thing flat bones out too. The mileage was the same stock or heavily modded.
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Post by jusjimbo on Nov 21, 2008 20:30:40 GMT -5
06 ruck here JCR flywheel polini with 6gram sliders cdi stock exhaust B&S filter daytona belt 43-45 on flats 38 against a strong wind and any decline it goes past 45 easy,had it to the warning light a few times on slight declines,I am in Florida so we don't have the bombing hills like other places.I am tossed between the quickness of my KN and the top end of my polini,wish I could combine the two
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Post by Dandy Dan on Nov 23, 2008 13:01:51 GMT -5
The SR50 is a really impressive scooter. I like how they didn't just go for cheap like a lot of companies these days. They created an awesome scooter. I wish there were most scooters like this. I'd love to pay $4g or $5g for a 50cc (or maybe 80cc) scooter with disc brakes, hydraulic forks, fuel injection, supercharged, inline 2 engine, tach, stereo, aluminum rims yadda yadda. Just because I want a small scooter doesn't mean I want a cheapo bike.
redryder, shaving the drive face boss essentially gears you a bit taller across the board. The advantage of that is that you can go 1-2 mph faster on the top end but the disadvantage is that you're also geared taller on the low end which means slightly worse acceleration. You've tossed in lighter rollers to combat that but if you had the polini but lighter rollers you'd have slightly faster acceleration still. The design of the Polini means that you're only geared taller on the top end when you need it. The polini might be a bit taller on the top end too, so you might gain another 1-2mph. Essentially, the polini will make you a little faster accelerating and maybe up top.
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Post by redryder on Nov 25, 2008 17:16:30 GMT -5
redryder, shaving the drive face boss essentially gears you a bit taller across the board. The advantage of that is that you can go 1-2 mph faster on the top end but the disadvantage is that you're also geared taller on the low end which means slightly worse acceleration. You've tossed in lighter rollers to combat that but if you had the polini but lighter rollers you'd have slightly faster acceleration still. The design of the Polini means that you're only geared taller on the top end when you need it. The polini might be a bit taller on the top end too, so you might gain another 1-2mph. Essentially, the polini will make you a little faster accelerating and maybe up top. Thanks Dan. That's the answer I was hoping for. I've got a new Polini variator on the way now. ;D
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Post by Dandy Dan on Nov 25, 2008 22:14:15 GMT -5
Good stuff! Don't expect a world of difference....if you keep your hopes low then you should be happy. It's still going to feel like the same slow scooter but it should be a bit faster.
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Post by redryder on Nov 25, 2008 22:48:24 GMT -5
Good stuff! Don't expect a world of difference....if you keep your hopes low then you should be happy. It's still going to feel like the same slow scooter but it should be a bit faster. I know what the performance increase was when I did the original variator mods so I'm not looking to win races. Another small but noticeable improvement will be fine. I'm thinking of mixing the weights (3x5.6g & 3x6.0) for about 5.8g total. I weigh about 145 lbs so that should improve the acceleration without hurting the top end. Thanks Again.
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Post by Kami no Chiizu on Nov 26, 2008 3:44:02 GMT -5
Experiment with weights. Since you're light, all 5.5's should, in theory, work good for you. And it works for a lot of people, like me, that wigh 25-30 lbs more than you, but they didn't for me.
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Post by Dandy Dan on Nov 29, 2008 12:36:26 GMT -5
Mixing weights isn't ideal because the heavier weights are doing most of the work and thus wear out faster. It's okay as a temporary setup but I wouldn't run like this long term. You can actually get weights that are 5.7g from Leo Vince. Check out this chart of roller weight availability: importationsthibault.com/2008/scooter08_page.php?langue=en&page=39Realistically though, 0.2g is a pretty tiny increment (6g vs. 5.8g). I would keep your increments to around 0.5g. If you wanna try lighter than 6g, just go all 5.6g.
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Post by redryder on Nov 29, 2008 13:01:35 GMT -5
Mixing weights isn't ideal because the heavier weights are doing most of the work and thus wear out faster. It's okay as a temporary setup but I wouldn't run like this long term. You can actually get weights that are 5.7g from Leo Vince. Check out this chart of roller weight availability: importationsthibault.com/2008/scooter08_page.php?langue=en&page=39Realistically though, 0.2g is a pretty tiny increment (6g vs. 5.8g). I would keep your increments to around 0.5g. If you wanna try lighter than 6g, just go all 5.6g. Thanks Dan and Kami I'll take your advice and try all 5.6g rollers to start and see what happens. This isn't a performance question but are any of you familiar with the LED replacement bulbs that fit in standard sockets? I want to keep the stock tail light on my Ruck, but I was thinking that one of the LED 1157 bulb replacements might give me a brighter brake/running light. Has anyone tried them?
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Post by smartbomb on Nov 29, 2008 16:29:25 GMT -5
I like the Dr Pulley rollers because no flat spots and nearly indefinate life.
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