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Post by gabito503 on May 7, 2018 21:23:16 GMT -5
Can I put a 150 carb on my 47mm bbk?🙏🏼🙏🏼🤯🤯
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shortman1166
Scoot Member
Posts: 52 
Location: Lafayette, Indiana
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Post by shortman1166 on May 12, 2018 17:50:29 GMT -5
I just installed a 47mm bbk and its running on the same pilot jet as 49cc #32 and only went to an #80 main jet from a #78. Does that seem normal or am I missing something? It is still running the stock airbox and stock exhaust. I took the plug out and it looks like it may be a bit rich but I am going to run it for a day and check again before I change anything cause it seems to be running fine.
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Post by GrumpyUnk on May 14, 2018 11:27:55 GMT -5
If you are satisfied, the quit fussing with it. Check the spark plug after a week or so of use. That should cover all situations, or more time if needed. As long as it accelerates without sag or hesitation, and will cruise and accelerate as desired, and idles without stalling, what more do you want?
If you are out to exact the last tidbit of performance, you need to buy some tools and invest time in learning about carburetor operation, theory and tuning. You will also need to be able to 'judge' or deduce/infer tuning from spark plug appearance. Don't forget to include listening in the mix of tuning input, as a pinging or knocking engine can tell you it is running too hot or too lean for prolonged operation without damage.
tom
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Post by Sir Scoots-A-Lot on Sept 30, 2018 17:47:23 GMT -5
I know I'm jumping the gun a little becaue it isn't installed just yet....but this thread has been touched in 4.5 months so... I just ordered a 47mm Glixal BBK off Amazon frommy bro's Prime account. Free 2 day shipping. About $27 for the kit which is just cylinder, piston, wrist pin, circlips, intake/exhaust studs, base/head gaskets & a pair of valve oil seals. Link to Glixal 47mm Cylinder kit(no head): www.amazon.com/gp/product/B01303YPEU/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1Does anyone know should I bother using the new oil seals if I am using my stock head and have no current problems with my head running my stock cylinder/piston? I heard good reviews for the Glixal kit on Amazon, on this forum and in this thread here so all that coupled with one of the lowest prices I could find delivered to my door and very fast is why I chose it. I hope me getting this "bare minimum" kit will be enough for some great results. I have recently heard bad reviews for a9 cam on here so I decided to skip that and I think my stock head will be good enough since it is running ok currently, I am just a little worried about the compression increase so I may run an extra gasket or two and make sure tomuse 93 octane gas, I also ordered #88, #91 and #94 main jets from partsforscooters.com (#95 was out of stock) to put in my pd19j CVK carb. Jets should arrive in 7-10 days if I read correctly, were under $3 each I believe and under $4 shipping so very good prices there. To wrap it up I ordered 6.5g sliders off e-bay fro $10.25 from seller PartsGalore which should arrive in about a week. If anyone has any pointers for me I will gladly take some advice! Thanks! I am excited to find out if I can make this run and if so how much power I will make on the roads I run  |
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Post by scooterpimp on Sept 30, 2018 20:15:24 GMT -5
Just clocked 50+ miles on bbk on zummer...not even a burp or hiccup since completed... going to change oil soon & get to cvt tuning.
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Post by Sir Scoots-A-Lot on Oct 4, 2018 23:03:27 GMT -5
I just installed a 47mm bbk and its running on the same pilot jet as 49cc #32 and only went to an #80 main jet from a #78. Does that seem normal or am I missing something? It is still running the stock airbox and stock exhaust. I took the plug out and it looks like it may be a bit rich but I am going to run it for a day and check again before I change anything cause it seems to be running fine. Have you been sticking with the #32 pilot and #80 main or did you end up changing it? Still running well? How is your top speed with those jets? Most people I hear of with a 47mm kit main jet between #88-#95 just from maybe the 12 or so people I have seen post their sizes on forums. I think most also don't use stock airbox anymore |
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Post by nancy49cc on Oct 27, 2018 20:29:49 GMT -5
TaoTao Texas sold me a 49cc and it was hard to start all the time. End result is low compression due to large gaps in top piston rings. Bought 47mm (75cc?) BBK from Amazon. Just finished today. Everything from the crankcase up. ALSO bought a nice $20 carb. Holy Crap ! Great acceleration up to 50mph+ Came with 6.5g rollers, but don't think i need em. Drilled 3/8 inch hole under exhaust outlet pulled a restrictor out of air filter cover. I'll keep ya posted  |
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Post by scootypuff on Jun 13, 2019 9:52:47 GMT -5
Installed one last week, will keep updated on it but as of now I love it!
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Post by colemanscoot on Oct 17, 2019 8:35:48 GMT -5
I just installed the Glixal 47mm Piston/Cylinder kit from Amazon which is cylinder and piston/rings only, I did also install an "upgraded" carburetor that is adjustable since mine had 0 adjustments on it at all (couldn't even adjust the idle). I will say it made a huge difference on bottom end and mid range. I only bought these 2 scooters to ride around campgrounds and needed a little more power for the hills and now I have it. I do have one issue though and I'm hoping someone can help. Since the install, when accelerating the engine sounds like it is running with no air filter at all on it. I am using the stock airbox/filter and tubing so I'm not sure what is going on. I have triple checked that everything is hooked up and nothing came apart, but for the life of me I cannot figure out why it sounds like it does. Anyone experience anything like this after an install? Could it sound different because I'm re-using the stock head or because the PAIR system is still in use? Is it a jetting problem (I don't really think that it is). Seems like it should be simple to figure out, but I just don't know what is going on. Any help is appreciated.
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mikeh
Scoot Member
Posts: 59
Location: Bradenton, FL
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Post by mikeh on Oct 26, 2019 20:15:36 GMT -5
I just installed the Glixal 47mm Piston/Cylinder kit from Amazon which is cylinder and piston/rings only, I did also install an "upgraded" carburetor that is adjustable since mine had 0 adjustments on it at all (couldn't even adjust the idle). I will say it made a huge difference on bottom end and mid range. I only bought these 2 scooters to ride around campgrounds and needed a little more power for the hills and now I have it. I do have one issue though and I'm hoping someone can help. Since the install, when accelerating the engine sounds like it is running with no air filter at all on it. I am using the stock airbox/filter and tubing so I'm not sure what is going on. I have triple checked that everything is hooked up and nothing came apart, but for the life of me I cannot figure out why it sounds like it does. Anyone experience anything like this after an install? Could it sound different because I'm re-using the stock head or because the PAIR system is still in use? Is it a jetting problem (I don't really think that it is). Seems like it should be simple to figure out, but I just don't know what is going on. Any help is appreciated. Hey bro. Just put on the glaxil 47mm kit today, went pretty well except for the chain tensioner bolt cracked off on me after I tightened it down. It's only under that small spring tension now, as I wait on my replacement from Amazon on Monday I just glued it back on. Crazy fix but it will work until Monday. I'm having some jetting/fuel issues as well, I got to figure out if I'm running too rich or what. I got a air filter pod instead of the junk air box filter, the scoot didn't like the airbox at all. I might try down jetting to 85-87 and then up some from 90. The piston ring clips sucked and getting the cam back on was a pain but it started right up. Rode it around a bit. I'll keep you in the loop but as far as the PAIR system you can toss it. Take it completely out, we are done with emissions and its no longer connected to anything, or it shouldn't be. EDIT: finally got my bike running correctly with the 47mm bbk. I ran into several problems post install, improperly set valve lash and a cylinder head bolt that sheared off due to poor metal quality (under 14 ft pound of torque!). got it running but ran into top end issues where the bike would hit a brick wall around 35 mph and would start to studder. originally thought it was a restricted cdi issue but ended up actually being a air starvation issue under load and high rpms (7400+ rpms). I deleted the entire airbox system and went with a pod filter which completely solved the problems. Final carb settings were a 33 pilot, 94 main, needle 2nd from the top. CVT and rollers are all stock. Upgraded to a adjustable unrestricted CDI. will post final top speeds later. I will wait to vote until I either get to a milestone or I have a failure. -Mike |
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donaldsonta
Scoot Member
Posts: 30
Location: Columbus, Ohio
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Post by donaldsonta on Nov 25, 2019 15:53:23 GMT -5
Ran a Goofit 47mm BBK from for more than 5k miles. I want to say it was on there from 2000km to 15000 maybe?
Ran very hard, lost my air filter a few times and had to ride home without one. Didn't know I was probably cruising everywhere at 9000rpms. I normally run WalMart 10w30 and replace every 1500-2000km.
Was leaking oil and ran low on oil a bunch of times. Eventually it caught up with me and damaged the rings. The upper oiling ring pushed down diagonal into the compression ring groove. Pretty nasty groove in the cyclinder.
Still ran, but only about 25 mph, and hard to start. Replaced, drained the oil a couple times to try and clean all the metal out.
I replaced with a new 47mm BBK around 15k or so. Replaced the crank around 20k. It had a little noise to it, not like a failure situation. Defineitly a lot of play in it when I removed it though. Re-used the piston and cyclinder after. So that second piston/barrel has been on for about 5000 miles or so? No problemo!
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mikeh
Scoot Member
Posts: 59
Location: Bradenton, FL
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Post by mikeh on Nov 25, 2019 16:16:59 GMT -5
Ran a Goofit 47mm BBK from for more than 5k miles. I want to say it was on there from 2000km to 15000 maybe? Ran very hard, lost my air filter a few times and had to ride home without one. Didn't know I was probably cruising everywhere at 9000rpms. I normally run WalMart 10w30 and replace every 1500-2000km.
Was leaking oil and ran low on oil a bunch of times. Eventually it caught up with me and damaged the rings. The upper oiling ring pushed down diagonal into the compression ring groove. Pretty nasty groove in the cyclinder.
Still ran, but only about 25 mph, and hard to start. Replaced, drained the oil a couple times to try and clean all the metal out.
I replaced with a new 47mm BBK around 15k or so. Replaced the crank around 20k. It had a little noise to it, not like a failure situation. Defineitly a lot of play in it when I removed it though. Re-used the piston and cyclinder after. So that second piston/barrel has been on for about 5000 miles or so? No problemo!
Thats hella impressive bro. I just put Glaxil 47mm kit on my scoot recently, I only have around 1100 KM stock on the bike as its brand new, got it in August. it seems like the 47mm kit is the way to go. Of course your increasing wear and tear but I think we all know this. how was your crank replacement experience? I WOT the bike pretty much the entire time, I just try and keep the RPMS from going over 9k. usual time is spent in the high 7000's. |
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donaldsonta
Scoot Member
Posts: 30
Location: Columbus, Ohio
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Post by donaldsonta on Nov 25, 2019 16:29:01 GMT -5
I do pretty similar with RPM range. Ideally not in the 8 or 9k range, but every once in a while you get a nice tailwind and you gotta top out for a bit.
I figure most people would get this sort of mileage out of a set if they ride them long enough. I had to do a lot of other goofing around in between with loose wires, crappy variators etc. It can be frustrating.
Honestly the crank change wasn't bad at all. 90GT Vert posted a good tutorial on doing it. Old bearings banged out pretty easily, combination of a torch and a can of duster provided the heat and cooling like he said. They fit together pretty easily. $50 on Amazon.
The single biggest piece of info I've found was the variator bushing replacement article that 90T Vert wrote. I was going through variators every thousand miles and and flattening rollers like crazy. Right now I have a nicer NYC variator on it that i swapped the center bushing in, but a regular Amazon $20 Glixal with a good bushing works just as well. Everything I bought had an aluminum bushing painted copper.
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mikeh
Scoot Member
Posts: 59
Location: Bradenton, FL
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Post by mikeh on Nov 25, 2019 20:18:30 GMT -5
I do pretty similar with RPM range. Ideally not in the 8 or 9k range, but every once in a while you get a nice tailwind and you gotta top out for a bit.
I figure most people would get this sort of mileage out of a set if they ride them long enough. I had to do a lot of other goofing around in between with loose wires, crappy variators etc. It can be frustrating.
Honestly the crank change wasn't bad at all. 90GT Vert posted a good tutorial on doing it. Old bearings banged out pretty easily, combination of a torch and a can of duster provided the heat and cooling like he said. They fit together pretty easily. $50 on Amazon.
The single biggest piece of info I've found was the variator bushing replacement article that 90T Vert wrote. I was going through variators every thousand miles and and flattening rollers like crazy. Right now I have a nicer NYC variator on it that i swapped the center bushing in, but a regular Amazon $20 Glixal with a good bushing works just as well. Everything I bought had an aluminum bushing painted copper.
how much of a change have you seen since tuning your variator? I would like to tackle that next to lower the rpm's a tad, I'd iminge id get a few more mphs out of the scoot. Honestly I find that going 38-40 mph is pretty fast. I think doing more then that is asking alot out of this 50cc frame set up. I'm just glad I'm not stuck doing 30 mph wot as a stock 50, I feel a tad safer and had way less annoyed motorists today. |
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donaldsonta
Scoot Member
Posts: 30
Location: Columbus, Ohio
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Post by donaldsonta on Nov 26, 2019 7:22:19 GMT -5
It was probably the biggest Jump I made performance wise. Mine had terrible rollers, and even after an airbox delete, muffler drill, and rejet I was still in th 30mph range because my RPMs were so low.
I started cheapest first, and the cost of rollers as well as confusion made it my second mod. A lot of sites made CVT tuning harder than it is. Probably to sell contra springs,honestly.
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