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Prob a good idea. I half way want to see what this 50 will take before it fails so I can rebuild it. So far it's strong.

Nothing really. Just keeping it mild and mixing it heavy with fuel to keep things cool. It does not even have a forged piston or rod. LOL.

My 50cc x18 blew so I basically tried to convert to a 150cc so I did custom motor mount a whole shabang. So I have all sorts of parts.

If you have a welder or someone that can weld the mounts then the 150 conversion is easy enough. The CDI, coil etc... all fits either bike so it will plug into the 50 harness. The 150 has mounts on top of engine where 50s are on bottom so that is the only issue and why you need to weld on mounts.

I have an NCY Cam and 19mm PE Nibbi on it. Thinking about putting that 21mm PWK back on. It made more RPM on top. But ran worse down low.

Yes. Stock regulator back on and I had a spare stock CDI from a 50 I put on it.

Ikr. Why don't they name them what they are equivalent to in roller language?

Excellent explanations.. I've always been told to go up 1 g when switching to sliders. Never tried it.

Most of these guys are just slapping parts on and not tuning for powerband, so I think your correct about a poorly tuned cvt responding well to sliders.

Wire what back? The entire bike? You can make any harness. Check out my "chuck-it" videos. I am pretty much making that harness. Even tho I am using the originals wires so i don't have to buy more wire. All the connections I am doing from scratch.

Over my paygrade...LOL! I don't know those words mean. 🤪🤘

So is the 65mm preferred over the 69 then? My new BBK 52.4mm came with the 64mm valve head and the valves are bigger. 20/23 I think.

That was always my complaint. No before and after results. Im sure an engine swap could have already happened. LOL. I'm running outta ideas to try and get this faster in 49cc mode. NCY performance variator is 89mm vs the 95mm one. I may have one of those. I think that big ass wheel and tire are what kills these things. But that is also the cool look. 😎

Well in theory when you get into stuff like porting and cams you also get into higher RPM which can exceed your OEM valve springs. It was not the case for me. LOL. They kind of all go together in making a performance head.

When i ported my big valve head for my 90cc i think i did more harm than good it pulls like hell at low rpm but higher rpm it looses allot of power so top speed is 70kmh 43mph So i probaly made them a bit too big i do have a 24mm carb with it tho

@@DiyNuke ahhh.... that almost describes what mine felt like. Quicker, but struggled on top.

Thank you

Good point. Everything adds up. And on these 50s the gains are tiny since we start so low in HP.

The fact that you actually used a spacer as a guide is a great way to get consistent port matches. By eye is how you get wonky ports so great job with that. Only thing I would have suggested was under the valve on the short radius of the port, the tight turn can usually use just a touch of smother and the casting rings are usually there, be careful of nicking the seat. Also there is a actual difference in the heads. 64 Mm valve length because of the short valve stem have the valve seat lower than the 69mm valve stem with the taller valve seat. Easy way to tell the difference is top of valve springs will be flush with the valve cover gasket, 69mm valve are just above the sealing surface. 69mm valve stem heads because of the taller valve seat can take more porting to the floor than the shorter 64mm valve heads. 64mm valve stem heads have a lot less material and are easily blown through. There are videos of people cutting the 64 and 69mm valve stem heads in half. So be mindful of which head you are going to port and for why. Otherwise great video buddy 👍 👏 👌

@@jeremyhope6869 thanks so much. That is great info. My new 52.4mm kit has the 64mm head. I don't think I'm gonna touch that one. LOL.

@@tedowen409 Google 69 vs 64mm valve head should show you the difference so you can see how much you can actually touch up and where you can actually improve the flow. Seeing a cut away actually helps. Another thing I liked to do when I was seriously with the gy6 was use the old cylinder and cut away a pie cut so you can bolt your new head on and check your valve clearance with the cam bolted on and the valve fully opened. Should tell you exactly how much you can shave off the head for max compression. Think old stroke using a wire on the piston to check squish. Same concept except valve clearance and simple way to check the clearance before shaving the head blind. Gasket thickness and since you can bolt cam on and actually get a idea of what cam is actually holding valve open for what and if your high performance cam is actually a performance cam for you. I know it sounds excessive but buddy you are way past simple bolt on and everything now is going to be custom made or modified 😆 🤣

@@jeremyhope6869 my brain just exploded. What a good idea compared to using clay with that cutaway. I do have extra old heads. Thanks.

LOL. No I just put that there for a joke. It's actually a dust seal off a front wheel bearing.

@@tedowen409 aw shit thought so looked like a seal but it also looked a lot like a "vario ring" as we like to call them here on the Netherlands due to some European law a 49cc must not exceed 35kmh and they just shim the rear variator so it never fully opens

@allansnelder3292 I think maddogs are so slow out of the box they don't have to restrict them. LOL

Not so far. I am gonna drop roller weight again and see. I really felt like they taking power. Could be all in my head though. I never got to a high enough RPM to justify them yet.

@@tedowen409 have you thought about using a two wire coil from a car to see if you get a hotter spark

@jeffkrauss5582 I have not. I thought about testing the "NCY" coil/Plug thing but have not bought it yet.

@@tedowen409 I believe the nyc is just a 96 caprice or crown Vic coil

@@jeffkrauss5582 oh... interesting. Thanks

Not sure. I just watched it from my computer at work and it worked fine.

@@tedowen409 I have to watch it on my phone for some reason. Only this one though. Weird.

@headwaystudio I have youtube vanced or cracked or something like that and it won't finish any videos anymore. My kids say I have to update it.

Had to clear my clear cache and cookies for my browser and it fixed it. Sadly that requires signing back into all my accounts now lol.

I just picked up a 5th gen maddog, and I'm torn between installing an electric pump or going this gravity fed route. What are your thoughts between the two?

I've had it on the freeways here

This is florida. We have golf carts on the highways. LOL

Nice. Still 49c ? I'm struggling with a 49cc trying to get it past 40. I'm blaming this florida heat. LOL

Ok... on the Suzuki burgman?

Ya I had someone else asking about me doing a lighter flywheel. I had a light one on mx bike for a few races but noticed I stalled the engine more so got rid of it. I guess with the CVT it would work good. And seems there is plenty of spinning mass in the CVT to compensate

😮

OMG... that is a crazy and great story.

@@tedowen409 hmmm... it was much longer in reality ;)the flat tyre was due to a detour due to a car accident the night before. just a quick duck down a side street... just a few hundred metres. iunno. broken bottle maybe? didnt SEE anything. pushed it out and back onto the main road... AND ITS CLEAR. no sign of road block or cops or diversion... not even five minutes... WTF? so, stress over finding tyre... sorted. the next morning, leave trailers at park, duck across bridge to shops, get coffee, smokes, check tyre pressure... someone stole the KEYS. not the scooters, no. just the keys... (i always leave my keys in my bikes?) got under the seat, tools, opened the dash, got the ignition switch out. vroom vroom cough. CODED KEYS!!!! all day to find a locksmith... next day to hire a van... neither of us had a full license so that was... tricky. long drive to locksmith. about $1200 all up... then a freak storm with 120km winds had us sitting inside watching TV for the rest of the week. got ONE day doing what we were supposed to do :)

@@paradiselost9946 would have been cheaper for the guy to rent you an airplane and banner to show his sigh. Wow

I don't know if they make a 4 valve head. I have "bigger" valve head and a 52.4mm piston and cylinder (89cc) for it. Already has the NCY Cam in it. I will be putting those in soon.

Ikr. Was just looking at old 2 stroke long case engines from some overseas honda. So much more power. The roughhouse is a 2 stroke, but 50cc.

Another great idea. I like your flattening the ramp idea best. I can handle that. Then I could use that NCY variator on the cheap.

Hmm. That's a really good idea. Why not? Cause I didn't even think of it. LOL. I have a huge press at the shop that will flatten nickles. I would not even have to head it. I could just press it a couple of mm. Damn. Thanks!

Thanks a bunch. I have mixed them before. I just ordered some 3 gram weights so I can try for even more RPM. I really wanted this 49cc to go faster than 40 before I give up and install the BKK sitting on the shelf. LOL

The issue is I use mostly aliexpress and ebay parts. Those links go dead when the product sells and resisted on ebay and for some reason the aliexpress links go dead in like a matter of weeks. That's why I'm just showing pics so you can search description, but agree... needs to be a better way.

I have a whole drawer full of wrong size fuel lines. LOL. The one from the gas tank and the one on the fuel pump are bigger than the one on the Carburetor. I just got 5mm line from China so no idea what size it is in inches, but it seem to fit everything good. I think it is between 1/4 and 3/16... but closer to 3/16 (4.7mm)

@@tedowen409 thx for the reply 👍

Ya I have had some pretty scary tank slappers on sport bikes. Somehow always managed to just be scary and not crash. It actually works good though.

Thans so much

Ha... a crashed burgman and blown up maddog are all the parts you need. The rest is whatever you want. Aliexpress links go dead fast so all my videos on this have a screenshot of the part I used. But they are just subject to price and preferences of you would want. Nothing specific is required. And with Ali Express parts. They are a starting point. Expect nothing to fit or work and you won't be disappointed

Have you seen my mini bike? Ghost 212. Street legal. 57mph. This thing is way heavier and a 49cc. So it is actually NOT slow "AF" for what it is. I have a 150 that does 80 so If your minibike is a 212 then....

Ahhh... that makes sense. Looks so weird though.

Me too. LOL

@@tedowen409 on a related note though, I'm glad you posted this. I'm basically just buying the rolling wrench kits to get mine better suited for daily use. They have a CVT kit I wanted to try once I got the 72cc bbk and the PWK carb kit they offer for the 139qmb. What's your opinion on rolling wrench anyway?

@hesperidesbell4643 He is a great guy. He only sells quality stuff. If he sells it then it works good. His prices are actually good also. Did you get his big bore kit? Did you see the video of the 50 I have doing 54mph with the big bore kit, Cam, 95mm variator and 21mm PWK? I will get this one there soon enough.

@@tedowen409 I ordered the BBK just yesterday, I'm super excited! I've been watching through your 139qmb playlist but I've been following the maddog build closest due to it being a fresh from stock build. I currently have a vitacci Ryker 50cc I bought a couple weeks ago.

@@hesperidesbell4643 OH cool. That Ryker looks sweet.

Ya. My youngest. I linked his channel in the description

@@tedowen409 tu