100hp 421 cub seasonal jetting change

showing how to jet for temp changes

[@montev4]

I wish I knew as much you do about all this mechanical stuff.

[@banshee100]

you will it ll comesin time brother

[@montev4]

I'm still kinda young, interested in learning mechanics, I'd like to work on performance engines or just mechanical work period lol

[@banshee100]

You can do it man believe in your self

[@julianlong26]

Hey.. 2 Important things you might want to mention. 1. It depends on what pipes you have and 2. Depends on elevation where you are at. Where I'm located it calls for 280 mains with T5 pipes

[@boostede90bmw23]

Julian Long your going off of stock carbs he clearly says keihin carbs

[@STILLNIGHTPEARL]

Totally different build, for one you’re on stock carbs, these are keihin carburetors, but yes pipes can make a difference as well as elevation, but I say anywhere from sea level to 2000ft you can run the same jetting, no real need for adjustments, also if you’re jetted on the rich side then you don’t need to go fatter when the temperatures drop, you can leave it as is.

[@banshee100]

wrong i have talked to keihn they said its the say there jets are set up

[@keithseiwert2256]

​@@banshee100 what's the same??

[@goldenwheeledbanshee9160]

Good video an thanks 4 the knowledge.

[@banshee100]

Welcome

[@jcproductions89]

I have basically a stock banshee with T5 pipes im at 142/42 at 1.5 turns out at 800’ sea level . 66 degrees outside

[@sergiosanchoranera8190]

Could you make a video showing the Kehin jet tables? 

[@victormonge9237]

You should stuff a yz125 into dat baja

[@EvolATV]

Shit mine has 35mm PWKs and its lean on 160 mains in the summertime. I run 165s in the summer and 170 to 175s in the winter. Your bike is way hotter than mine too. I would be doing a rebuild video if I were running 150s..lol

[@banshee100]

What's your elevation and mods

[@coreypryce]

Crazy to me how my 421 jetting is no where close to others. Had it dyno tune I have keihin pwk33 and they ended up with 135 mains, 48 pilots. Most everyone else is 150-160 mains. Mine seems to run pretty good tho.

[@banshee100]

Put 35mm on

[@anthonyrios1977]

What size pilot jets?

[@d0vvN]

I love your accent😂😂😂

[@banshee100]

Lol thanks

[@dennisfleming2554]

Does the humidity affect your jetting cause i had a ct pipe on my raptor and they recommended a 175 and 170 for 70 degrees low humidity but i dont live in southern cali so i used a 170 and 165... southeastern pa is warm and usually fairly humid in spring and summer

[@banshee100]

Elevation does Humidity will make it run richer for hotter humidity

[@jesseholland1851]

What area are u from I'm from Memphis tn I got a 472 super cub CPI outframe pipes also pwk 35s on gas what jetting would be OK for that set up it pulls fine on launch but sputters mid range to top end I'm guessing needle adjustment an maybe a main adjustment but not sure what to set it at..thanks

[@banshee100]

Never had that motor

[@jesseholland1851]

Ok

[@enginelife8449]

Amazing info

[@melvinriley2060]

i have a 421 cheetah cub, with cool head, shearer sbif, 39 keihin pwks, stock bore stock stroke, im trying to figure out my jetting! im 185 above sea level, i currently have a 168 on the main and a 60 pilot but its not rt

[@banshee100]

Take it out into the pasture on the highway put it in 5th gear about 25 miles an hour and floor it run it to redline tell me what it does

[@melvinriley2060]

when i first put the carbs on it ran great. next day not so much it just bogged every time i wop the throttle

[@banshee100]

Is that alcohol carbs or gas

[@melvinriley2060]

vp 110

[@banshee100]

52pilot

[@enginelife8449]

Do you also have to change your jets on a 4 stroke seasonally ?

[@banshee100]

Yes

[@jalonleslie6512]

Hey man I really like your vids and I'm trying to get into four-wheelers but I really don't know what to look for do you think you could help me with some info

[@banshee100]

Yes sir

[@jalonleslie6512]

@@banshee100 I'm somewhat of an experienced Rider and I was looking at a yfz450 or something like that like a older bike 2006 range just for some country riding in the fields

[@banshee100]

@@jalonleslie6512 get 07 yfz they came with the oil mod 06 didnot

[@jalonleslie6512]

@@banshee100 thanks for the tip I definitely would not have know that little detail thanks man 👍🏽

[@banshee100]

Yea sir owned a 450 yfz for 10 years

[@user-lx7fu6yx5u]

where are you from ? my builder sent my cub back with 162 mains. he told me the cylinders were lean with those mains and i would need to be running 170 mains to "ride around" with. ive left the 162s in for the last few weeks and havent gotten my coolant temp past 160. im in houston tx. what are ur thougthts? i also had ab jets in my carbs. he thought they were fake cause of it and said he couldnt get it ruinning right without using real kehin jets

[@banshee100]

Your builder is an idiot. I am from Tennessee and run 155 mains.

[@user-lx7fu6yx5u]

@@banshee100 who built urs ? i thought i found good builder. you might’ve heard of him. he’s from san diego, kevin herr (herr jugss racing)

[@banshee100]

@user-lx7fu6yx5u he's good but mine will not run on 160 mains way to rich

[@user-lx7fu6yx5u]

@@banshee100 mine hauls ass. i have a ported yz250 and have always wanted a banshee. i bought it a year ago and didn’t know a damn thing about them. kevin told me it was a knock off cub cylinder with an iron sleeve and the durations were all messed up. he ported it and fixed it. i just threw it in last weekend. i feel like it’s almost as fast as urs.

[@aj.r1014]

Bruh we just want to see you ride the banshee pleeeaase

[@banshee100]

you will

[@aj.r1014]

@@banshee100 yessss👌👌👌

[@melvinriley2060]

one other thing do you have stock clutches

[@banshee100]

Watch MY other vid 100hp breakdown

[@waldotorres6413]

When you change the main do you change the pilot too

[@banshee100]

Yes

[@waldotorres6413]

What pilot u use when running 158 main

[@banshee100]

55

[@chrisgriffin3374]

So what air fuel ratio does this keep the engine at ideally?

[@banshee100]

No clue

[@justinwiley9798]

What pipes do ypu use?

[@banshee100]

Shears

[@JoseSandoval-xh9gf]

I have bout the same set up 421 cheetah cub, inframe shears, 35mm keihin carbs, running 152 main what pilot should I be running? I currently have 45 pilots

[@banshee100]

What's you air screw set at?

[@JoseSandoval-xh9gf]

Hellcat channel Three turns out

[@banshee100]

@@JoseSandoval-xh9gf try 1 turn out

[@JoseSandoval-xh9gf]

@Hellcat channel I will that thanks

[@rideordie2736]

What's your bike riding like eith 152 and 45?

[@Hackjobgarage]

What gas do you run?

[@banshee100]

Renegades

[@avrahambrea1919]

what cc is it?

[@chadwems]

421 cheetah cub. i have one myself but with cpi inframe drag pipes

[@giusepperestifo759]

Have you made any money off KZbin yet?

[@banshee100]

Yes alittle not much

[@giusepperestifo759]

How do you get money? Like do u haft to hook up ur credit card or something?