Maddog 150 Mod #9 (KEIHIN PWK 28MM) GY6 Smooth Bore Flat Slide

GY6 icebear maddog 50 150, chuckus, ruckus
I will test each mod individually. Mod to-do list:

FREE Mods
x Air Filter
x PAIR delete
x 842 Belt
x Muffler insert
x Cat delete
Adjust Valves
x Tune Carb

MONEY MODS
x NCY CDI
NCY direct coil
x 28mm smooth bore carb
A9 Cam
x Electric Fuel Pump
171 BBK with 28.5mm Head

CVT MODS
Performance clutch
NCY 115mm variator
Roller weights
Final Drive Gear

Gy6 139QMB KYMCO agility k-pipe super 8 noodoe people x-town xciting Wolf islander ex-150 striker Taotao atm-50 gy50 thunder vip 150 Genuine Scooter sym mio Lance cabo pch Havana cali 50 150 Roughhouse Buddy Hooligan Brio Rattler

[jluis]

Thank y ou for sharing the tuning jets you used. 🤙

[jod]

Okay I thank you very much for you know the input. Yeah I have you know that $150 ice bear Challenger and I'm already doing 65 if not 70 on just what I'm running you know stock 1:50 I had a pwk on it I was trying to put on it but I think I need to order some jets for it because it wasn't you know tuning correctly so I took it off and I put you know the stock carburetor back on and that's what I'm getting out of it now is about 65 you know if not 70 miles an hour it's fast. I do want to try to put a 842 belt on but the boss is not long enough so got to get shims

[Mark_Cabe_]

I've been trying to fine tune a keihin pwk 28 on a 171 for now for WEEKS. I'm using a wideband AFR and my target is 13:1 from 3/4 to wot. My issue is any way I jet it or what clip position I use there's always either a bog when I punch it from idle to wot OR a "flat" spot above cruise position. Watching the AFR gauge going down the road is lulz af 🤣. And it seems to fluctuate a little so I'm reading a baseline average. Something I just learned is it can actually draw air in through the fitting the cable goes through on the top and using thread sealant helps a little. But the biggest challenge I'm messing with is experimenting with different needle taper profiles to try to iron out that transition overlap between circuits. I've figured out jetting the pilot a little rich helps with the off idle bog if I use a jjj needle. Completely understanding how these carbs work and all the needle profile changes, and how settings can effect the AFR at a DIFFERENT throttle position makes me wish I had conserved a few more of those brain cells I burned off in my 20's. 😂😂

[bobbydisco]

Typically your carb should be 80% the size of your valve

[johnnygonzales]

What are your thoughs or opinion on putting a slide carb on a 90cc Chuckus? It was suggested that I install a 22mm Nibbi carb on my Gen IV maddag.

[airframer]

Great that means I can use my pro-build slide 28mm carb when I swap to stock 150cc motor…

[shorejiggingreunion]

Which is your pilot jet and main jet for better performance ?
Im using actually 32/110 and runs good

[removeableskull]

I have a clone 28 mm pwk and I’m having a weird bog at full or near full throttle I got the 38 pilot and 120 main jet in right now As I’m driving it’s like I can creep up on the threshold of the bog and when it happens I have to blip the throttle to keep the engine going but it forces me to lose some speed any insight would be appreciated thank you

[Kevin.Owens]

Did you have to use a different twist throttle assembly or were you able to make the stock one work with pwk cable ? Thanks

[ZCRAIZED]

@GhettoWrench
Im trying to find the top oiece for the carburetor that causes the cable to be ar an angle. I found a metal 90 that is treaded but it is just a tube, not a cap to fit on the carburetor. I don't know what that angled top cap is called. I am not finding it probably because i dont know the name of it. Rolling wrench doesn't seem to have it anymore.

[jluis]

So talks down on the carb as an upgrade 1:09, then ends video without admitting it improves performance on stock chuckus... so did it increase performance? 4:40

[seanmayo]

U have a link to the fuel pump u have?

[headwaystudio]

Purchased this carb when I first bought my bike and just started putting it on my icebear tonight. Im not getting any fuel. I have the port attached directly to the manifold connected to my vacuum for my fuel pump. and the fuel is in the correct place as well. Im a little stumped atm

did you keep your crank case vents connected and venting back towards the rear wheel? and the fuel tank vent open as well? I plan on doing more trouble shooting tomorrow.

[dillondygert]

Did it require a new intake manifold? Can you provide link?

Same question applies to throttle cable (I have Gen4 150cc maddog)

[wnotwhp]

Dude, What are you using to record your times, is it an app ? or a tool linked through an app ?

[hugger]

Did you end up sticking with the 115 and 35 jets for that build?

[seanmayo]

I would like for there to be some fucking mechanics in this state instead of a bunch