cylon
Scoot Junior
Posts: 13
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Post by cylon on Jan 23, 2013 12:57:47 GMT -5
Hello everyone here at 49ccScoot, I'm new to this forum and I have a few questions for all the scooter experts out there. I picked up a new 2012 TaoTao CY50-A 50cc scooter with 1 mile (handsome boy style)  I plan on adding a few performance parts to it, to increase power and reliability. The first part I have in question in the CDI, I plan on installing a Red hot high energy GY6 ignition coil as well as the everlasting CR7 Iridium Spark Plug, I'm not 100% sure if the stock CDI is limited or not but I want a better quality part in there anyways, has anyone compared the GY6 Racing CDI (Blue w/heatsink) vs PERFORMANCE CDI (Orange Plastic) I've heard mixed things about the Racing CDI not firing, not much on the performance CDI. Next, the carburetor, I plan on getting a quality replacement 18mm (stock) carb since I assume mine is sealed and it wasn't running that smooth when I put that 1 mile on it, lot's of hesitation and bogging not to mention it was 5°F outside. I do plan on keeping the stock air box and filter to avoid having to re-vent the crank case and just for overall reliability. However I will be installing the performance exhaust system that has the golden alloy anodized finish for improved airflow. I believe a #80 main jet will allow the proper fuel ratio for the increase in air flow? but I'm not totally sure on this and would appreciate some advise. I'll also be replacing all the stock fuel and vacuum lines with scrappy's heavy duty yellow line's to rule out any vacuum issues. Last, sliders, clutch springs and torque springs. This is where I'm fairly clueless. I'm 210 lbs so I assume that 5g sliders will do? I not going to bother with a high performance variator since I'm not really increasing much torque at all just a small bit of horsepower. As for the clutch and torque springs I'm guessing 2k on each or is 1.5k better? I will be getting the high performance clutch. This is the area I need the most help with because I know nothing about CVT's. Thanks in advance guys, also wanted to note that I'll be ordering all my parts through scrappydogscooters. If I can get this all figured out I should be able to post pictures and my opinions on this build setup for everyone. |
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davidns17
Scoot Member
scooter crazy
Posts: 45
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Post by davidns17 on Jan 23, 2013 15:34:18 GMT -5
Hey man welcome to the forum!  Nice scooter To start off the stock cdi is limited I believe around 8000rpm. the difference with the orange cdi and the blue racing cdi is, the orange one will remove the rev limiter, but the blue one removes the rev limiter and advances the timing. I would go with the blue cdi you'll get better performance all around. I've had no problem with mine in 1000+ miles. As far as the coils go the red hot coil just makes the spark bigger and hotter and will increase power and fuel milage and the iridium plug will withstand the bigger spark and is made of higher quality materials. The best way to find out if your carb is sealed is to remove it and look at the float bowl at the bottom and see if there are 3 rivits that dont allow you to remove it then its sealed, but if it has screws and allows you to remove the float bowl it's not. These carbs that come from the factory are pourly made and I would advise to replace it with a quality carb like Keihin. As for the performance exhaust I have used the stainless steal one on scrappys website wich is the same brand as the golden one and it is a good pipe but there are better quality pipes that cost less on ebay for around 80$ plus free shipping. www.ebay.com/itm/Scooter-Performance-Exhaust-Muffler-50cc-GY6-Chrome-Moped-with-Pipe-/120841320736?pt=Other_Vehicle_Parts&hash=item1c22b43920&vxp=mtrThe vacum lines are not a bad idea as they are better than then the cheap stock ones and they wont fall apart over time and clog up the carburetor jets. I would suggest getting a jet tuning kit (like from Enviromoto) so you can find the right jet for your setup, because not all jets work for everybody and it really depends on your climate and elvation. You can fid out more about carb tuning in the jet section. enviromoto.ecrater.com/c/708829/50cc-gy6For the cvt I would go with the yellow 1.5 torque and clutch springs. you wont see a big inprovement with the performace clutch as your stock one should be able to withstand the power your bike has with the stock cylinder kit and you shouldn't see any slippage. But if your decide for a bigger bore kit the performance clutch would do better in that scenario. with the weights you want to stay in your powerband as to light weights will increase rpm and lower top speeds as with to heavy weights will decrease speed up hills and cause your bike to bog down and decrease rpm out of your power band and decrease top speed. the best way would be to get a roller tuning kit like prima from Enviromoto and try those out before you buy the more expensive sliders. I believe you should try 5-8 grams for a starting point. There is also more info on cvt tuning in the tech section. hope that helps. |
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Post by 90GTVert on Jan 23, 2013 17:10:30 GMT -5
:welcome2: The iridium plug is a good idea, especially in cold climates since it can ease starting. I usually pick up my plugs on eBay. Usually the cheapest spot for NGKs. www.ebay.com/sch/i.html?LH_BIN=1&_from=R40&_sacat=0&_nkw=cr7hix&_sop=15Enviromoto is right there as well, with free shipping... enviromoto.ecrater.com/p/3547361/ngk-cr7hix-iridium-ix-sparkThe ignition coil, I could take it or leave it. I do have them on my scoots, but I really can't swear that they do anything. I've heard some say the cheaper aftermarket coils are stock quality or sometimes worse. I really don't know, but if budget is and issue, I think I'd skip it for now. The CDI is an upgrade that sometime does and sometime doesn't work. To begin with, if your stock CDI is not rev limited, then the only advantage you may see is from the timing curve (ignition advance). Some CDIs really do advance the timing, others only claim to. I'd say listen to davidns17 on that one, because I have no clue what Scrappy's do. You can actually advance your timing a bit by modifying the pickup's mounting tabs. Basically you just elongate the mount holes so the pickup can be moved a few mm. That's a free mod, assuming you have the tools. If your scoot is indeed rev limited, I'd suggest just getting a replacement CDI. If not, I personally would just mod the pickup coil and save myself $20-$25 plus S&H. Depends what you're comfortable with. If you do use a CDI that advances timing or if you mod the mount to DIY, listen for detonation/spark knock. It will often sound like a rattle. You should be fine if you are using premium pump gas and your engine's compression is stock. May be OK on a stock motor with 87 octane? Never tried it. If you aren't sure if your current CDI is rev limited, I would consider spending the money on a cheap tachometer like the Trail Tech TTO before the CDI. Not only will knowing your RPM tell you that, but it can be a great tool for tuning the CVT and carburetor as well. It's one of those things that I never knew how much I needed on my scooters until getting used to having one. I agree with the previous opinion as well, that tuning should be done as opposed to selecting a jet based on others and counting on that to be correct. What works for others is a great starting point, but I would never just assume that my jetting is right. If you're too lean you can damage the engine from overheating and if you are too rich it just won't run as well as it should... but always err on the side of rich. Here's a direct link to the jet kit mentioned... enviromoto.ecrater.com/p/4129835/naraku-main-jet-set-gy6-50I'd probably pass on the torque/contra spring for now, and instead tune with rollers/sliders. The rollers/sliders counteract the contra spring. Unless you need to make a big change and can't get (or in some cases, don't have handy) light or heavy enough weights, it's not necessary to change the contra. The exception would be if you are having trouble with the drive belt slipping and everything else is functioning properly. The contra spring is much harder, or at least more time consuming, to swap in and out than the rollers/sliders are. Another reason I would avoid it for now is that I do suggest sliders, so just put the money there instead IMO. If for no other reason, sliders will outlast rollers in my experience. They have worked well for me with performance gains in many setups also. For the clutch springs, I'd say consider how the scooter performs at launch now. The clutch springs have the biggest role in the initial hit, just as you hit the gas and start to go. I recall being pretty pleased with the stock clutch springs, until I modified the engine to make power at higher RPM with a different camshaft and other mods. If you feel like it's sluggish right off the line, I don't think I'd bother with the clutch springs ATM. If it seems to struggle to get the revs up when you first hit the gas, then try some stiffer springs. I have to go cook dinner right now, so I didn't spend the extra time to add links, but if you need help finding more info on something I can link you to a lot of it or others can help. |
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Post by 90GTVert on Jan 23, 2013 17:14:23 GMT -5
Also, do you plan to keep updating this thread as you go along or are you just asking these questions? I prefer to leave the builds section for more long term things, so I'll move it to the most appropriate area if need be.
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cylon
Scoot Junior
Posts: 13
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Post by cylon on Jan 23, 2013 17:14:28 GMT -5
Thank you for your reply, and the information. Did help me a lot and is going to save me some money know that I don't need to waste money on the clutch and springs. Do you think the carb at scrappy is decent? I've never ordered from ebay before and it kind of sketches me out lol... (I don't know if I can trust it sometimes.) www.scrappydogscooters.com/Replacement_Parts.htmlAlso if you don't mind me asking what mods do you have on your scooter and what do you like the most? |
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cylon
Scoot Junior
Posts: 13
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Post by cylon on Jan 23, 2013 17:21:23 GMT -5
It will be awhile before I update because its very cold here right now, when I get the parts we could always move it back, just consider it questions for now, thank you for you information!
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Post by scoottrash1990 on Jan 23, 2013 17:51:09 GMT -5
ebay is one of of the better places to buy from IMO....just pay attention to sellers feedback and ask questions if your unsure about something.....i order off ebay all the time and have never had a issue...
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davidns17
Scoot Member
scooter crazy
Posts: 45
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Post by davidns17 on Jan 23, 2013 18:30:22 GMT -5
The link I made for the ebay exhaust I've bought from that exact seller and I believe it took 3 to 4 days and was packaged very well. I always try to look for top rated sellers and the good seller feedbacks. I've ordered over 20 items from ebay with no problems. You just have to know what your looking for. Scrappydogscooters has an ebay page as well. myworld.ebay.com/scrappydogscooters |
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Post by 90GTVert on Jan 23, 2013 18:45:04 GMT -5
The carb from Scrappy should be good.
I don't have a 4T anymore, but my favorite mod for small displacement scoots like these is a big bore kit. Improves power throughout the rev range so the scoot is quicker and faster. You can get them as cheap or cheaper than the avg pipe for your GY6, and they'll make a lot bigger difference. The real downside is that they're harder to install.
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davidns17
Scoot Member
scooter crazy
Posts: 45
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Post by davidns17 on Jan 23, 2013 19:04:48 GMT -5
90GTVert is right out of all the parts on my scooter I think the most substantial performance gain for the price was my big bore kit. I'm not sure the exact price I paid for my kit because it had 50mm cylinder bigger head A9 camshaft and some other small bits for 100 bucks. But I would guess for the 50mm big bore cylinder kit in the 60$ range.
After the big bore kit is when the small things like cdi's, coils and exhaust I could tell started to make a noticeable difference.
With my other scoot the cdi coil and exhaust didn't make much of a difference with the stock engine so I dont think its worth the money for those parts unless it had a big bore kit.
So I would start with that first if that is something you can do.
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millsc
Scoot Enthusiast
Posts: 103
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Post by millsc on Jan 23, 2013 19:07:41 GMT -5
a performance pipe without a big bore kit will hinder performance not enough back pressure with the 39mm piston and it bottlenecks been there done this
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cylon
Scoot Junior
Posts: 13
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Post by cylon on Jan 23, 2013 19:11:41 GMT -5
Ya I was interested in a BBK for awhile but not so much interested in putting one in lol, I work 65 hours a week don't have the time for it, I don't really mind if I don't get huge power gains. I plan on getting a 250 once I get more saved up I'm just looking to simply tinker on something for a hobby That exhaust you ordered, did it have the mounting bracket when you got it shipped? Did you have to mod anything? |
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millsc
Scoot Enthusiast
Posts: 103
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Post by millsc on Jan 23, 2013 19:14:00 GMT -5
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millsc
Scoot Enthusiast
Posts: 103
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Post by millsc on Jan 23, 2013 19:18:12 GMT -5
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davidns17
Scoot Member
scooter crazy
Posts: 45
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Post by davidns17 on Jan 23, 2013 19:28:13 GMT -5
The exhaust did come with the header pipe with the bracket on it that mounts to the engine and muffler came with the clamp but not the bracket that mounts the clamp to the engine that you see on more expensive pipes. I just used the clamp and a strip of metal with holes in it to mount the can for extra support. You can see in the builds section (my scooter) in my picture how I mounted my muffler.
Also you will need an exhaust gasket because it is not included in the kit, or reuse your stock one. I just used some high temp gasket maker on mine.
Overall I think the biggest gain you get with the performance exhaust is the sound. It makes a huge difference and it makes it sound like a beast!! Some people say its not worth it, but the sound it makes is hard to pass up.
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I plan on adding a few performance parts to it, to increase power and reliability. The first part I have in question in the CDI, I plan on installing a Red hot high energy GY6 ignition coil as well as the everlasting CR7 Iridium Spark Plug, I'm not 100% sure if the stock CDI is limited or not but I want a better quality part in there anyways, has anyone compared the GY6 Racing CDI (Blue w/heatsink) vs PERFORMANCE CDI (Orange Plastic) I've heard mixed things about the Racing CDI not firing, not much on the performance CDI. 
