Banshee porting 101 simple start

The simple first step to making power on the Yamaha Banshee. Surprise, its not the intake that makes the real power. If you are going to port one tunnel on the jug make it the exhaust. It yields the most power of any part of the cylinder.

[@chaneybruton2912]

Love watching your videos, been following you on FB & IG for a while now and now on here. Would love to see more videos of bikes after you’ve worked your magic on them. Running, riding, racing... that type of thing. Keep it coming!

[@boostedtdis]

Just got my first banshee love it wish i would've found this video 2 months ago just put a whole new top end in. Now i can do it and see the difference. You ever run any banshees with the chariot 2-1 carb setup that's what this is paid 700$ for the quad just had broken reeds lol

[@herrjugsracing7816]

I do not like the single carb setups. If you want that top end power you have to run 2 carbs.

[@cncnmore4505]

I recently received my HJR 4 mill kit with the Mx hardcore port on my stock cylinders domes and all..very well packaged and everything looks amazing !!I can’t wait to build it and rip up the trails here in Michigan...gonna be a long winter lol

[@rpcraighead]

Worked with Kev when he got started... Using flap wheels and such. Rode the first bike (his) and it was alarmingly fast!

[@Dostiempos.Canarias]

Thank you so much,máster!

[@chanceshort8160]

Great videos ,I really appreciate it

[@herrjugsracing7816]

Thanks for watching!

[@bikelifewiz8144]

I personally tried this out and oh boy let me tell you, this did a major change on my 4mill stock cylinder stock bore no intake porting stock carbs , just with exhaust porting it woke up like it never did , I rode my buddy’s 4mill same setup and it was no where the same , this is really good when it comes to making power , and keep in mind this was my first time picking up a cylinder and triying to do some port work, my bike rides solid no issues at all and it’s true you don’t have to be specific with it.

[@herrjugsracing7816]

Glad you tried it. I try and tell people what works but the internet is hard to battle with. Everybody is a keyboard expert.

[@rideordie2736]

@@herrjugsracing7816 where are you located

[@lbproductions8354]

Thank you I’ll be trying this on a spare blaster cylinder and a Rt100 cylinder

[@timothykelley656]

Wow,, rt100 was my first bike,, 1992,,, I just went back in time

[@Ohiohomegrown420]

Great videos you make! alot of knowledge iv watched them all. I just built my first not stock motor. Picked the assassin 4 mil. Haven't ran it yet but wish I seen this before I put it together I need to port them. Good job Keep posting video they are great.

[@herrjugsracing7816]

Glad to help

[@MX-fo2nu]

Good and clear describtion

[@herrjugsracing7816]

Thanks a lot

[@BurritoBoyzz]

Awesome video Kevin can you make a crankshaft repair video?

[@chriscallas9358]

Thank you.

[@herrjugsracing7816]

You're welcome!

[@ElFather024]

Waooo, that easy nice

[@jayrosa9685]

Great Video! If done on a stock Banshee with T5's what would you recommend on jetting?

[@herrjugsracing7816]

It depends but 330 mains it what I use here in Glamis with 30 pilots, air screw 1 turn out.

[@williepelzer384]

In 1999 I had what was called a mild race port. Cost me $350.00.

[@ODamoo]

Would want to see the power curve and torc difference form before and after the port widening/adjustments.

[@a.j.dasilva578]

This may seem like a fun question but do you have to at least hone the cylinder when your done or is it fine left alone?

[@herrjugsracing7816]

You don't have to but its a good time to measure and bore if needed.

[@matthewjohnson2495]

Just to be sure I’m understanding you correctly, you are only doing the top of the port with out getting into the sleeve Right? Don’t do any of the bottom of the port Right?

[@herrjugsracing7816]

Correct, you are raising the roof but not dropping the floor. Watch the video closely. You can see how the work is done.

[@marcomenegazzo5743]

what brand of cylinders is it? thx

[@glenne3868]

I’ve been trying to get a hold of you on STB. Would love if you could answer a couple questions of me.

[@herrjugsracing7816]

I'm sorry. Try [e-mail]

[@jcd0402]

Same type of cylinder as a niche brand one? If yes, how reliable are they?

[@herrjugsracing7816]

They do fine when the quality control is checked before using.

[@LuisGarcia-zc2vv]

I have a question What do you do first the porting and then do the bore?

[@herrjugsracing7816]

It just depends on the work flow. If you are porting yourself and someone else is doing the bore always port after the bore and finish chamfer.

[@2817485160]

Can this cause the main jets to go up a size or 2?

[@herrjugsracing7816]

Yes

[@250race]

Thanks

[@herrjugsracing7816]

No problem

[@ElFather024]

I’ll do it, I have stocks jugs 👍

[@josetellez8772]

Hey I bought a athenas 370 cc kit and it says triple ported cylinders so I’m kind of confused can someone tell me why it says or what’s triple port???? Thanks

[@herrjugsracing7816]

Fancy talk meaning that it has 3 exhaust exits.

[@jgrossaint]

What do your 350's make for power with stock carbs and cpi's?

[@jgrossaint]

Race ported

[@herrjugsracing7816]

70 hp pump gas.

[@chrostopheragius4516]

Will this work on Yamaha RDs too ?

[@herrjugsracing7816]

Yes it will

[@eperformancenews4208]

Best teacher is it💪🏽💪🏽💯🫡

[@xxjsgamer2778]

Can I do this on my stock cylinders with out bore them

[@herrjugsracing7816]

You sure can.

[@250race]

How do I get to see more of your port work

[@herrjugsracing7816]

On IG and FB. If I wasn't so busy I would make more videos.

[@juancastro8684]

Can you port and bore my stock banshee cylinders?

[@herrjugsracing7816]

Yes, herrjugsracing.com

[@russellp1982]

Wouldn't this lower the compression Having the exhaust port higher up in the cylinder?

[@herrjugsracing7816]

The more you raise the less the swept compression is. This lowers it just slightly.

[@lbproductions8354]

I’ve been watching for a while now did you ever beat you PB in the demon?

[@herrjugsracing7816]

Not yet, I keep getting slower : (

[@lbproductions8354]

@@herrjugsracing7816 One day you’ll have to port my Lt250r jug🤘

[@herrjugsracing7816]

@@lbproductions8354 I'm ready, bring it!

[@zacatecano1986]

Kevin whats a good exhaist timing degree when only trying to help your topend without changing the transffers ? 188-194 ?

[@STILLNIGHTPEARL]

I wouldn’t go over 198, 194-196 is plenty.

[@herrjugsracing7816]

Always start low 188 to 190 will increase it a lot.

[@Mohammedbanshee350]

💯👍💯👍💯👍💯👍🤗

[@philliprussell5090]

Why don't you champher the port after you finished machining it will give better ring life ???

[@herrjugsracing7816]

Always, always, always all ports. That is a big rule in 2 stroke life. Why would you think not?