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Post by eclark5483 on Jul 27, 2017 19:56:12 GMT -5
From my last ATM50 purchase, I learned that the muffler in them is restricted. CDI is not, for real gains, drill the muffler.
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Post by drotedcc on Jul 27, 2017 21:01:11 GMT -5
Hey drotedcc great little build so far!! I too am new to the scoot world and just got an atm50. I was thinking about getting a new carb and cdi box, so I'm wondering if there were any gains in power and top speed with them? Thanks man! Like Eclark said, the muffler seems restricted, so that would give a better boost then getting a new carb and CDI, however, I would still recommend a new carb, and if you want a new CDI get a new CDI. I might have inched the topspeed a little, but that's about it, however, Luna runs much better with the new carb, and the 87 jet, that I tuned perfect. It destroyed my idle problems, and it just runs much better. I just saw your build about a week ago, hopefully you are having a better time then I, haha. |
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Post by dan50 on Jul 27, 2017 23:08:38 GMT -5
Hey drotedcc great little build so far!! I too am new to the scoot world and just got an atm50. I was thinking about getting a new carb and cdi box, so I'm wondering if there were any gains in power and top speed with them? Thanks man! The answer to your question is no. Neither will get you more mph. A new quality unsealed carb is a good thing to get and tuning it right will make the engine last longer (stock carbs are jetted lean, a slightly rich fuel/air mixture helps cool the engine). So many people say that performance CDI's are a waste of money, unless you want to spend a few hundred an a real racing one. Just order a couple of stock CDI's to have spares on hand, also, a couple of spare coils is a good idea. The biggest gain for the buck in performance and top speed is modifying the CVT. I tuned my CVT when the engine was stock and got it to 42mph top speed. Watch video's in the tech section on working on CVT's. Tuning a CVT can be done for $50 or less. |
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Post by eclark5483 on Jul 28, 2017 3:23:50 GMT -5
If it was myself personally, the very bare minimum work I would do on an ATM50-A1, is get rid of the stock carb, and drill out the restriction washer in the muffler. Get the engine running the way it needs to be with proper jetting and exhaust. Then if you want to spend more, ALWAYS start at the CVT. CDI's are not always a gimic, and yes they are super cheap, but why spend money you don't have to when you can just do a simple carb swap and pipe tune, and that should tell you right there what you're rapping out at before you spend another dime. Don't buy it because you think you "might" need it. Confirm it first, save yourself some money for other things.
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Post by eclark5483 on Jul 28, 2017 3:34:18 GMT -5
Oh, and suggested accessory: The Whistler MotoGlo unit. I think it would look good on your bike, and is a great safety feature. I use them on all my scooters/motorcycle and helmets. www.amazon.com/dp/B00I902DUI |
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Post by jhill15 on Jul 30, 2017 7:11:59 GMT -5
Hey drotedcc great little build so far!! I too am new to the scoot world and just got an atm50. I was thinking about getting a new carb and cdi box, so I'm wondering if there were any gains in power and top speed with them? Thanks man! Like Eclark said, the muffler seems restricted, so that would give a better boost then getting a new carb and CDI, however, I would still recommend a new carb, and if you want a new CDI get a new CDI. I might have inched the topspeed a little, but that's about it, however, Luna runs much better with the new carb, and the 87 jet, that I tuned perfect. It destroyed my idle problems, and it just runs much better. I just saw your build about a week ago, hopefully you are having a better time then I, haha. Sorry for the late response. When you guys say drill out the muffler how do you make that happen? I've had a couple run ins with it wanting to die out on me at a red light but other than that she's ran pretty good. I need to balance my tires and swap in the new valve stems...hoping to get that done on Wednesday. |
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Post by eclark5483 on Jul 30, 2017 12:40:50 GMT -5
If you take a flashlight and look in from where the exhaust comes out, you will see a smaller hole then the tip. This is the restriction. You will need a fairly long drill bit to reach it. Once you drill it out, you'll notice a top speed improvement because of the better flow.
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Post by jhill15 on Jul 30, 2017 12:42:33 GMT -5
If you take a flashlight and look in from where the exhaust comes out, you will see a smaller hole then the tip. This is the restriction. You will need a fairly long drill bit to reach it. Once you drill it out, you'll notice a top speed improvement because of the better flow. That doesn't seem to hard to pull off. Thanks man I will check it out. |
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Post by greggkinney on Jul 30, 2017 21:59:21 GMT -5
the pole your talking about on the front of your scooter should be bendable if you put a good pipe over it. i used something along the lines of an old galvanized 1/2" water pipe on mine
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Post by dan50 on Jul 31, 2017 1:07:09 GMT -5
the pole your talking about on the front of your scooter should be bendable if you put a good pipe over it. i used something along the lines of an old galvanized 1/2" water pipe on mine Great idea! Mine is welded on at an angle, not straight. |
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Post by dan50 on Aug 1, 2017 0:00:49 GMT -5
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Post by drotedcc on Aug 5, 2017 16:15:26 GMT -5
Hey yall, lil update before my next big update. I bought aftermarket cvt stuff, and a new pod filter (Need a oilcatch or something for the breather, will figure something out soon, right now it ziptied as high as I can get it.) I wanted to share my sweet overdetailed post with photos, however, the variator nut is a challenger that requires all my strength. I don't have money for an impact, so I will be getting a breaker bar soon. (Don't worry, got a nifty tool that locks the teeth so I can really go at it). I tried for three hours today to remove it with a socket wrench. tipped the bike and might have cracked a panel. So once I get the nut off, I'll post. If I don't, the nut won and I threw the scoot off a cliff.
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Post by dan50 on Aug 6, 2017 1:24:10 GMT -5
Don't vent the oil catch can out of the crankcase where the dipstick goes. This is not a good vent, my scoot blew oil out everywhere but the catch can. The catch can works a whole lot better if you use the stock vent that comes out of the valve cover. You can also use a PCV valve (from Scrappydogs) with a small filter taped to it and zip-tie it as high as you can, mines to the side of the gas tank zip-tied to the frame.
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Post by drotedcc on Aug 7, 2017 17:15:30 GMT -5
I know I know, I been skipping on yall with posts. I don't want to make a big post until its I get the CVT upgrades done. However, I hit a setback. After the install of all the parts (new clutch with 2000rpm springs, new air filter, and a new variator kit with 6.5 gram roller weights), my average at WOT is 29mph, max being 32. The accel looks abit better, and the big jet I already had in there paired with the new filter nicely (I think, haha). Still trying to figure out why top end dipped.
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artman4life
Scoot Member
Posts: 42 
Location: Lewistown Pa
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Post by artman4life on Aug 7, 2017 19:34:04 GMT -5
what variatar kit and clutch did you get? contra spring too stiff maybe?
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