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Maddog 50cc is Fast as a Stock 150cc with these Mods for Under $500. See description:

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All the “performance” mods and parts are starting to finally come together for the Gen 1 50cc Maddog 139QMB. A lot of these GY6 mods tend to build on each other and this is a good example. The Polini 95mm Variator that had slowed me down before is now increasing my top speed and my acceleration. All the engine parts on it right now to get this speed total $481.66. I still have the rear end gear up mod and the 21mm PWK left to do as I try and get 55mph. I don’t have links as they constantly go dead, but search these below in the list of parts to find them on Amazon and EBay:
• Naraku 100.52 Big Bore Kit
• 64mm Rocker Arms
• Nibbi PE19
• Nibbi Flange Adapter
• Polini Variator #241.647
• NCY High Performance Cam
• GY6 150cc Aluminum Intake Manifold
• 50mm Cone Air Filter
How to install the 50cc Big Bore Kit: • The Complete and Defin...
How to install the Nibbi Carb: • Nibbi 19mm PE19 Carbur...

Опубликовано:

22 авг 2024

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Комментарии : 62

@ericmorgan1256 Месяц назад

I have a built tao tao 50 with a cheap glixal setup. I also just recently bought a Maddog and am waiting on my naruku bbk to show up after seeing your videos on that. I really enjoy your content, humor, and scientific but fun approach. Keep the videos coming, man 👍🏻👍🏻

@GhettoWrench Месяц назад

@ericmorgan1256 thanks a bunch

@Slane583 2 месяца назад

It's coming along nicely. I like the clean look of everything being powder coated white. Mine is painted a deep metallic red but because it just says "red" on the title there's no fancy name to it. So I can paint it any shade of red under the sun and not have to worry about legal bs because I decided to change the color. I have many plans for mine but they're going to have to wait for when I can make them happen. :)

@GhettoWrench 2 месяца назад

Yep, you either have time or money, but never both.

@Slane583 2 месяца назад

@@GhettoWrench Indeed. I couldn't agree more.

@bbcarp1020 Месяц назад

Glad I found your video, I have a maddog trike with 171cc big bore kit for the 150cc, you are helping me understand gearing, rollers and jets better

@GhettoWrench Месяц назад

@billbritton6081 thanks so much

@scooterarmy 2 месяца назад

Your really killing it on these videos. Bravo

@GhettoWrench 2 месяца назад

Thanks man. I'm just watching yours to learn this stuff and repeating it😆

@scooterarmy 2 месяца назад

@@GhettoWrench your style and production quality is top notch

@GhettoWrench 2 месяца назад

@scooterarmy thanks bud 😊

@DustySteel 2 месяца назад

Awesome video!!

@GhettoWrench 2 месяца назад

Thanks!

@frednetherlands887 2 месяца назад

Thank you again. Very useful to see your analysis.

@ThePitProductions 2 месяца назад

one step at a time,one step.

@GhettoWrench 2 месяца назад

Baby steps. LOL

@edwinmendija8087 2 месяца назад

I'm glad I found your channel. My mods/upgrades are almost identical. Will be on Maui for the coming week so starting my new engine will have to wait. I stagger the variator weights until I arrive at an rpm or speed that I like but go by seat of the pants feel and gps speed runs. Where can I get the app that you are using for testing? Thanks again for a great informational/educational video!

@GhettoWrench 2 месяца назад

It is called "Drag Racer" in the app store. icon is just the letters DR. Ya after I do the tops speed stuff for gee wiz factor, I usually tune it back to heavier weights so I like the feel and sacrifice some top speed.

@MrQ_Cruz Месяц назад

Great video! Im working on the same project with the exact same results. I think we must change the cdi from a 150 scooter to let the bike go significantly faster. but its a very risky swap. Ive heard the timing can be way off and wrecking the engine.

@GhettoWrench Месяц назад

The 150 CDI and the 50 CDI are identical I think. Just my suspicion. I have a new blue racing CDI and a NCY "150" CDI and the Glixel orange 150/50 CDI. I am going to do a test on all these. I wanted to make sure the bike was running top speed before that test. I did actually calibrate the timing on that pickup for another project and the mechanical timing is onlt 30 degrees advanced so that gives zero room for an advance map. Prob why aftermarket CDIs always go slower in all my 150cc tests.

@MrQ_Cruz Месяц назад

@@GhettoWrench thanks for your response. Im looking forward for the test results. my next upgrade will be a better carb. I want to have a little quicker throttle response.

@GhettoWrench Месяц назад

@MrQ_Cruz I ended up going back to the PWK cause it matched the bike better. LOL. It is identical to the Nibbi 19 as far as performance goes. The PWK was harder to dial in though.

@isaiah6541 2 месяца назад

Throw sum heavier valve springs in it. And maybe bump up the compression to help out on that top end

@GhettoWrench 2 месяца назад

I have a whole video on that. Also the 20/23 mm head has heavier springs than both the NCY and Taida. I would have to use 150cc springs. But they would actually slow me down. Too much drag. I am only turning 8000 rpm. Until you get above 10k rpm the heavy valve springs will work against you. If I bump compression with no head gasket or shaving head it will roll the cam back as the chain becomes "longer" and retard cam timing. It will feel faster because of the dip in the power curve, but will actually get slower with that mod.

@seanmayo206 2 дня назад

When speaking about valves does length like the 64 or 69 mean something about compression? I've got a 50mm piston kit with a9 an valves are 69. Which is what came on it an can any of it affect crankshaft as far as the stroke? Knowledge is power

@GhettoWrench 2 дня назад

@seanmayo206 not at all. It is simply because the head is made up in the valve train and some heads need the 5mm shorter valve stem. It seems the Taiwan performance heads have the shorter valves. Not sure why though.

@thereal-stl_slim 2 месяца назад

Love the content so hard to find videos on mad dogs. I used to be a builder back when the Gen ones came out. Have you tried the ncy final drive gear set yet?

@GhettoWrench 2 месяца назад

That's my next video. 😆 waiting to get it.

@seanmayo206 2 дня назад

Folks ncy isn't nothing but the same parts but look different. Ask ncy did they machine um.

@SpAcEcruizer203 2 месяца назад

On my 125cc I got more top end when I went up on the needle actually with the clip on the bottom slot it had more torque but bogged out a lil in 3rd gear gotta fight thru it then I put the clip on the 2nd slot it cleared it all up nibbi 24mm 115/ 48 jets

@GhettoWrench 2 месяца назад

Ya I need to mess around with that some more. Still ain't smooth. Thanks

@markdavis29 16 дней назад

What are your thoughts on long term reliability with that big bore kit? I keep hearing you have to upgrade the crank or you will wipe out the bottom end.

@seanmayo206 2 дня назад

Ifs it 50 stock . It's not gonna wear as quick . Keep oil changed. Be cautious of what carb is sucking in . Depending carb the carb an setup. Grit will go thru intake an guess what happens

@tttam96 2 месяца назад

I'm a bit new to the whole modification scene or making mopeds and scooters better but I'm going to some to keep up and I'd like to know what app you are using to track the data and speed?

@GhettoWrench 2 месяца назад

Called Drag Racer and icon is a DR

@tttam96 2 месяца назад

Thank you

@dantheflyinman1576 2 месяца назад

Put that 21 flat slide on it

@GhettoWrench 2 месяца назад

You are getting ahead of me. LOL. Im gonna do that after I watch the gear up kit fail. Gear up kit gets here today, but working nights so maybe I will put it in tomorrow.

@seanmayo206 2 дня назад

I did. Pwk. Good luck figuring it out. The problem is the scooter transmission. That carb is instant response . Can the transmission be the same. Think

@seanmayo206 2 дня назад

It will work but there will be a delay in response so it could wear the trans quicker but all the mechanical parts are cheap but the plastics for maddog for battery cover shit is over 100$. Crazy right

@GhettoWrench 20 часов назад

@seanmayo206 you nailed it! These flat slide and D slide carbs do not work good with CVT transmissions. I an just discovering this. I just got the best speed yet running a junk drawer 150 24mm CVK witehd no tune.

@LBJ3423 Месяц назад

What speedometer app is that you’re using? Thanks.

@GhettoWrench Месяц назад

@LBJ3423 the speedo on the screen is from the gopro GPS. The phone app is called "Drag Racer"

@LBJ3423 Месяц назад

@@GhettoWrench thank you. Great videos btw using your channel to get my 50 good until im ready for the 150 swap next summer.

@GhettoWrench 28 дней назад

@LBJ3423 that would be a good video. You don't live in Florida do you?

@djilu9916 2 месяца назад

I'm runnin a 72cc, just put in a new 727mm belt and front variator (same size as stock), and an unrestriccted variator bushing, now i'm hitting 6mph slower on hills. Any idea why?

@GhettoWrench Месяц назад

When did slow down? After the belt change? Or after doing all that stuff? Ate you sure the belt you took out was a 727? This was not a maddog was it?

@djilu9916 Месяц назад

@@GhettoWrench nope, a kymco super 8 so a long qmb139. I changed them all at once, old belt was a 732. new belt is 737, theres a typo on my comment lol. I was wondering if the new variator front end is a bit heavier? so the old rollers are now a tad too heavy. not sure though

@GhettoWrench Месяц назад

@djilu9916 that longer belt probably geared you up so you are lugging down up those hills. See if you like the shorter belt better.

@djilu9916 Месяц назад

@@GhettoWrench Thanks! i gotta try that

@djilu9916 Месяц назад

@@GhettoWrench are there any other meta for mountain areas than lighter rollers? the hills here in the Alps are insane lol