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Post by scooterstudent on Oct 2, 2007 14:52:40 GMT -5
My sig. other has a '07 Kymco People S 50 4T. It has about 900km on it, but its slower than she expected, and I'm trying to find out if this is normal and how to improve the speed. Bike info:'07 Kymco People S 50 4T (4-Stroke). It has a mini-windshield (see picture), which I believe should help reduce drag.  Rider Info: 5'8, 147lb. With clothes, motorcycle jacket & helmet, closer to 155lb. Acceleration: Accelerates quickly to 50kph (~31mph), slowly works its way up to 60kph max (37mph). Top speed: ~ 59kph (36.66 mph) on flat. ~ 61kph (37.90 mph) on slight downhill. ~ 50kph (31.07 mph) on steep uphill. This model has the 16" wheels, so I thought it should be able to hit near 50mph? The goal is to get it to accelerate quickly to 40mph (+10 mph boost) and top speed of 50mph (+13mph boost). So here are my questions: 1) Is this the normal stock speed for the bike? (Or is there something wrong?). 2) If this is normal speed, what modifications can be made to improve the speed? 3) Is this bike "rev limited?" If so, how can this restriction be removed? Can the dealership do this? 4) Do I need to buy a "no-rev-limit CDI" box? Like this: cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=200157468397How do I know which one to buy? 5) Would a new sport exhaust make it that much faster? If so, what is a good exhaust? 6) Any other tips? THANKS SO MUCH FOR YOUR HELP! |
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Post by earlwb on Oct 2, 2007 16:27:10 GMT -5
Yes that is about right for a 50cc 4 stroke engine powered scooter. better than others like that too.
A 2 cycle engined scooter might go about 40 or so, so that is really pretty good.
it is possible that there may be some speed restrictions, one doesn't know unless they check into it. There could be many ways to restrict it.
But it doesn't sound like it is restricted to me, if you can get almost 40mph out of it.
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Post by rerun2 on Oct 2, 2007 23:22:19 GMT -5
The scoot sounds like it is performing as it should, speed included. There are quite a few threads on the forum that address 'mods' or modifications for the 50cc GY6 engine, which I am pretty sure is the type you have. There seem to be some things that can be done pretty economically to enhance the performance, but I don't see those getting the increase in speeds you want. Probably the kits that increase the actual engine displacement would do what you wish, but these cost a bit, and installation will be another factor, either your efforts, of the cost to have the dealer do it. Keep in mind that a lot of folks feel that the trade off in performance to longevity with the 'big bore kits' is no bargain. Personally, I don't think I would mess with the engine on a scoot of the quality you have. I would probably trade it in for a more capable machine, a 125cc or 150cc. I ride a 50cc scooter that is fitted with just about all the performance 'enhancements' you can do, except high pref. exhaust system. I get slightly better performance than you say you want, but my total outlay is considerably less than the retail cost of your KYMCO. Just my thoughts... happy scootin'...  |
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Post by scooterstudent on Oct 3, 2007 1:07:40 GMT -5
Thanks for the tips. Upgrading the engine to higher CC is not an option right now.
What are the best mods that can be under for $200 by the dealer?
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Post by earlwb on Oct 3, 2007 9:19:01 GMT -5
The dealer won't likely do them and they will lvery ikely void your warranty.
A high performance ignition coil, irridium spark plug, a racing CDI without speed limiter, a high flow racing air cleaner, drill out or partially gut the muffler, rejet the carb.
Check the variator to ensure they didn't put in a thin spacer on it to limit top end speed.
Some scooters had a metal washer spot welded into the exhasut pipe, you can check and remove it if it is in there.
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Post by rerun2 on Oct 3, 2007 14:33:48 GMT -5
I am not all that knowledgeable on the topic of modifications, that is why I had my scoot 'juiced' at the dealership BEFORE I got it, I got more than I paid for in my opinion, Scootertronics did a wonderful job for me. However, I knew precisely what I was doing and could have purchased a larger machine for less $ than I put into my 50cc bike. I have a ChiCom scoot, and never considered the warranty aspects of the manufacturer, only the integrity of the dealer. All that being said, I THINK you could add a little performance by experimenting with the roller weights in your variator, and using an iridium plug. I don't think either of those would void your warranty at all, and you could certainly do them yourself. In all honesty, I don't think you can accomplish what you want without voiding your warranty, and even if you do that, I really believe the only way you are going to get there is expanding the capacity of the engine. An option might be to 'trade down' in quality t o get a more powerful scooter... but I am in now way suggesting you do that. If you were willing to settle for lower quality, I would suggest SELLING the KYMCO rather than trading it in. I believe you could make out that way, and still not have to get into the real garbage bin of scooters. Just my rambling thoughts scooterstudent... I hope something said might be of help... ;D
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Post by mike65072 on Oct 3, 2007 15:20:12 GMT -5
Nice looking scoot! As other have said, your top speed sounds about right. Most stock 50cc 4 strokes top out in the 35 - 40mph range. Your scooter weighs 225lbs, which is fairly heavy for a 50cc scoot. You may be able to squeeze a few more mph out for $200, but that's about it. It'll take some serious $$$ to see 50mph. Good luck, Mike
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Post by poohbear on Oct 3, 2007 21:22:47 GMT -5
Previous poster may have a reasonable idea. Up grade to a bigger scooter, and MAYBE not sacrifice any quality at all! I read that post, and just out of pure curiosity went to CBXman site to check out some prices, They list the People 50 at $2,299 maybe the S in your designation might mean an added goodie or something, but just using the figure of $2,300 retail. Your scooter has about 480 miles or so on it, no real milage on your bike at all... on the used market I think $1,800 would be a steal for a buyer. CBXman also has UM scooters. UM (United Motors) has an affilitation with HYOSUNG out of Korea. On the site they offer a UM Powermax 150 for $1,799. Now, IF that particualr scooter is a Hyosung machine, I will tell you it is every bit the quality as your KYMCO. When stationed in Korea, I learned that Hyosung is one of he most desired and well respected machines they can get. i do not know if UM has bikes from other manufacturers or not, so if this is of interest, do check out the maker!
Oh well, guess my day has gone to hell because I actually paid attention to something rerun2 posted!
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Post by hillbilly on Oct 4, 2007 2:37:37 GMT -5
Sorry scooterstudent but it is running the speeds it should. Wheel size has nothing to do with the speeds achieved on a scooter since they can compensate with different gearing. If they didn't then the initial acceleration would be poor. Larger wheels generally provide better handling if higher speeds can be achieved but do not produce the speed. Power does. Noticeable power increases in 4-stroke 50cc scoots cost more than you want to spend.
Since it is running well I recommend that you enjoy it as is and keep up the maintenance until you are ready to get something that can produce more power without having to kill itself. The Kymco will have more resale value if it is left stock also.
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