Kawasaki KX112 part 2: Porting and Head Mods

Рет қаралды 19,636

Күн бұрын

Part 2 of our kx112 modification series
Porting, head cutting, ignition changes and dyno testing all the changes
Check back for part 3
www.hpracedevelopment.com

Пікірлер: 101

@TheSlim93gt Жыл бұрын

I skip all your 4 stroke videos, but are glued to any 2 stroke content. Keep them coming!

@andrewshipp2739 11 ай бұрын

Hi from Australia. This was fascinating for me. I'm a motorcycle mechanic, but i don't get the chance to faff about with performance, just servicing and repairs. Thanks for providing av great education. I'm going need with some of this stuff on personal bikes in future and see where i can get to with it 😂

@bermbuster6 5 ай бұрын

Thank you for the education! It’s nice to have someone of such knowledge and worth to take the time to explain the reasons behind why they do what they do! To see the gains after is priceless. Thank you!

@ktmvmx7477 11 ай бұрын

I was pleasantly surprised to see you use the clutch pull and blip technique after pull runs. More important as the capacity of the bike increases. Well done

@mikie758 5 ай бұрын

What’s the reason for the blip?

@2strokepipes471 Жыл бұрын

I can honestly say I agree with 99% of what you said. You have a good modern view on two strokes.

@Randy_Cox Жыл бұрын

Great stuff dude. Love learning all this stuff.

@Benjamin8019 11 ай бұрын

Amazing video - thanks for shedding some light of the process to refine an mx engine… fascinating!

@cnosigamer Жыл бұрын

I have to seriously thank you for making such videos!!

@reh9999 Жыл бұрын

Great content Derek, learning alot.

@PGG909 Жыл бұрын

THIS is a great video. I just tore down a 87 lt250r. Cut head .025”, raised the exhaust ports about 1mm and adding a 38mm carb. I had not thought about adding timing but I will now do that!

@AutoBeta2T 10 ай бұрын

Just found your channel Derek. Great video - thanks for sharing 😊

@chrispayne1029 Жыл бұрын

Great Video Great job 👍

@COWASOGGY 19 күн бұрын

dude...amazing stuff

@ivanracing27 Жыл бұрын

I already wanted to send you my kx 112 2023 engine so that you can return it to me with a lot of power haha wow you left me crazy greetings from Puerto Rico 🙋‍♂️

@tcrooks25 9 ай бұрын

That bike sounds real sweet

@leandrogarra 11 ай бұрын

I dont undertand your lenguaje very well but i love this videos! Thanks

@D.Technical.S 11 ай бұрын

Nice man , learned A LOT watching you're vid's ... that's insane !!!! thx for that . Using and tuning myself with HPI complete ignitions , but with the stock curves , youre video on that topic was great . Thinking on getting a reprogrammable CDI from HPI . Tuning myself 70cc and 80cc racebikes for 20 years, entering a new level just from you're videos . Looking for that next video on the phatheads and if you could have fixed the overrev problems ... cause that's where i'm stuck on my bike . Was thinking of buying another exhaust to get it hotter like you mentioned ... or maybe learning some cheaper technics from you 😄. Love to see that next video , can't find on the ytbchannel ....

@rochellestanley9532 11 ай бұрын

Very informative 👍🇺🇸

@tcrooks25 9 ай бұрын

Would love to see you doing this on a CR500. Great video

@ehess8845 Жыл бұрын

Great stuff, new sub...at what point of adding compression would it be beneficial to cut in some race fuel?...even 30/70 or 50/50?

@HPRaceDevelopment Жыл бұрын

Anything past stock becomes extremely risky. The OEM has already tested it to the limit. How much octane is needed then varies on both power generated and compression ratio etc.

@EarthSurferUSA 3 ай бұрын

If you are using Foredom porting tools, (CC specialty), Try the small #28 handle with the 1/8th collet, using a 3" long solid carbide burr cutter with a sphere end. (cutting length is like .5-.75"), for the tight work like that transfer port tunnel work. It is small, (can still grab edges though), and long enough to reach, and see what you are doing. :) I have pored a lot of engines by hand. I use a small Tormac CNC mill now, (last 17 years), and just hand finish them. Your probably right on the tunnel texture,---but I do it anyway.

@HPRaceDevelopment 3 ай бұрын

I have yet to see a cnc be able to do 2t transfers properly.

@craighills2382 Жыл бұрын

You do need to know your craft, it is well obvious you do know. It is by no means a back yard thing . I can bolt on a couple things change piston and rings .But to venture for horsepower not my thing Those Championships don't come easy and these bikes must stay together on race day ,they get a lot of punishment . Thank you enjoyable on any kind of bike mods to watch It is never enough watching time.Thank you

@mustknowinfo2001 Жыл бұрын

How much does the added compression porting cost

@1000draggsxr Жыл бұрын

So what’s your thoughts on just adding the timing to a stock motor . Or does it require the head work?

@HPRaceDevelopment Жыл бұрын

it will loose power and rpm

@mikebrown41182 Жыл бұрын

How much will racegas add to to the peak, and could you push it even further with ignition, and last question STIC is not available for superminis yet if i am correct? Cool video again Derek, these are stuff everyone wants to see. 👍🏼

@HPRaceDevelopment Жыл бұрын

generally fuel doesnt add power - but it can allow changes to the engine that can add power. adding igntion past optimum point will just loose power and rpm no stic - sorry

@mikebrown41182 Жыл бұрын

@@HPRaceDevelopment Apreciate the input Derek.

@HorsepowerHouse 3 ай бұрын

There are many videos testing different fuels on a million different engines (cars, boats, bikes, etc). Stick with what OEM recommends as far as octane. But what you often get from buying race fuel is better consistency and overall quality of fuel, or specific fuel that is legal for particular racing orgnizations. But as far as expecting crazy increases in power - not so much. Been there done that. People who make crazy claims that "race fuel" (which is a very broad term considering there are tons of different "Race fuel" types) making far more power are dilusional. Or the jetting is better which a particular fuel - and that is that.

@dan64654 4 ай бұрын

have you worked on husqvarna wr300 ? i would really like some more power on the top end. tried raising the power valve, and the helped a lot with onset of power. best regards

@HPRaceDevelopment 4 ай бұрын

No sorry

@willemdeysel1766 Жыл бұрын

nice work like always,,,,can you help me to show me what i can do to my kx125 1999 pls,,,i use it on street drive

@devynsummerall8009 7 ай бұрын

I have a kx112 how much do you charge for this exact work to be done on my bike please lmk cause I need this for the next step in my racing journey

@Chuck_84 8 ай бұрын

Hey man this is absolutely amazing I was just wondering how much to get a kx100 turned by you

@HPRaceDevelopment 8 ай бұрын

depends on the build - 100 mods up to 104 strokers etc

@alerusso5356 10 ай бұрын

Hi, i really appreciate your videos, very helpful and technical. I just wanted to ask you if is there any book or text, that you may know, which i can rely on to obtain more advanced information about 2 stroke engines

@HPRaceDevelopment 10 ай бұрын

Not really. Modern info is no in any books I know of. There are lots of forums around the world that have some good bits...but it's hard to sort through and find.

@Framlife351 11 ай бұрын

Is it safe to assume that the top of the transfer ports are the limiting factor in raising the boost port?

@HPRaceDevelopment 11 ай бұрын

not sure what you mean but no? The boost port - has nothing above it to prevent raising it - to the point of the water jackets.

@martinparent145 Жыл бұрын

Great video ! Have you dynoed a 2014+ stock KX100 ? Does these mods also apply to the KX100 (2014+) ?

@HPRaceDevelopment Жыл бұрын

All of our mods apply to any bike. Just have to do the right things. We have dyno lot’s of kx100s. They haven’t changed much since 08

@martinparent145 Жыл бұрын

@@HPRaceDevelopment what is the stock HP of the KX100cc ?

@HPRaceDevelopment Жыл бұрын

@@martinparent145 less than the 112

@scottashton6533 Жыл бұрын

Yeah he does a Dino video on the KX100 it's really good he does all the best mods

@travistaylor7666 Жыл бұрын

Great video. How much would all of this work cost?

@HPRaceDevelopment Жыл бұрын

Depends but in this instance around 650 labor

@crupty8707 Ай бұрын

@hp race development my kx85 2017 with a 100 cylinder and fresh crank seals is running scorching hot on the exhaust and cylinder after quick 3 min ride or just idling?

@HPRaceDevelopment Ай бұрын

Thanks for the info, sounds like you got some troubleshooting to do

@1176hambone Жыл бұрын

This is great television!

@troylambert5140 Жыл бұрын

This guy is badass!

@craighills2382 Жыл бұрын

Major Gains hey

@TepcoCycleRepair Жыл бұрын

Because you have a Dyno, have you done a video on mix ratios compared to power? Say on a 250 maybe?

@HPRaceDevelopment Жыл бұрын

yes. What do you think is best if you had to guess

@TepcoCycleRepair Жыл бұрын

@@HPRaceDevelopment With older air cooled bikes with larger clearances I would say more oil for sealing but with water cooled modern engines I would think it's not as noticeable if at all by mixing more oil than say 40:1. So my number guess would be, air cooled older bikes 20:1 and modern water cooled bikes 40:1. I'm aware of the 1978 test on the PE250 but times have changed which peaks my curiosity. Please link me to a video of a modern bike test related to this. Your before and after comparison videos are gems!

@TepcoCycleRepair Жыл бұрын

But I would say at any ratio proper jetting is more important for power gain.

@HPRaceDevelopment Жыл бұрын

@@TepcoCycleRepair It's been our experience with synthetics around 32:1 is best, especially on 85cc and 125 cc for power. Longevity wise 28:1 does wonders for 85ccs and superminis. On castor down to 20:1 usually most hp by a tiny bit over 32:1 but both by a good margin over 50:1. Having said all that - on track, I feel the on off nature of the throttle and rpm, means we have an accumulation of oil in the crankcases off throttle that clears out to whatever mix ratio is under long load. but the short loads it's "over oiled" briefly. So - on track Im slowly convincing myself about 40:1 is right. That said parts will last longer at 32:1 for sure.

@garethcrothers7989 3 ай бұрын

If I was to advance the timing on a standard kx65 what would it do to the motor performance?

@HPRaceDevelopment 3 ай бұрын

Stock bikes are set up well for their configuration

@danielfouardlibertarianono8017 11 ай бұрын

The first thing I noticed after you ported the cylinder was way way less smoke. I interpret that as more fuel burned = more efficient = more power! I'm correct am I?

@HPRaceDevelopment 11 ай бұрын

probably was just warmed up better at time of video

@SB-fe4gt Жыл бұрын

Please tell us the rpm where the peaks occur...Thanks. I need the rpm so I can gear my bike to achieve the absolute highest top speed possible...I want the horsepower peak to occur at the same time my top speed is occurring :).

@rickkilhoffer5693 Ай бұрын

What kind of hp do you think the Pro Circuit 112 have?

@HPRaceDevelopment Ай бұрын

last one tested was 25

@Taylor.741 Жыл бұрын

If I wanna be a client and have work done on my bike by you guys can I have that done I wanna get more power out of my bike and do some real racing

@Thankyou123-h3m Жыл бұрын

What state are you in.

@HPRaceDevelopment Жыл бұрын

@thefirstskratch7740 11 ай бұрын

where should i go to learn how to port 2strokes. Im just an old timer who wants to do work for the locals. 1st 2stroke i had was a 1982 yz80j. favorite 2 stroke was lamsons 1991 peak 125 bike. (wish i never sold it) stopped racing in 2000 after i broke my femur. motox is the best sport, if you dont know do it once! its like crack. lol

@christerandersson5556 Жыл бұрын

Part 3 soon?😊

@HPRaceDevelopment Жыл бұрын

sooner or later. Shops busy!

@CraigHenry-zq8jz Жыл бұрын

Why put it in third gear during the dinno?. please reply.

@HPRaceDevelopment Жыл бұрын

what gear should I select in your opinion and why

@CraigHenry-zq8jz Жыл бұрын

@@HPRaceDevelopment I wouldn't know,I'm just wondering why.i took notice of the same gear choice on another vid would it matter if you choose first gear ECT.

@HPRaceDevelopment Жыл бұрын

@@CraigHenry-zq8jz power doesn't change with gear selection, on an inertia dyno LOAD time changes.

@CraigHenry-zq8jz Жыл бұрын

@@HPRaceDevelopment thanks for your help.

@scottashton6533 Жыл бұрын

Are you running 40 to 1?

@HPRaceDevelopment Жыл бұрын

Nope

@1176hambone Жыл бұрын

I heard that "sizzly" harmonics sound at spots...

@HPRaceDevelopment Жыл бұрын

yeah not sure yet if deto or misfires. when cyl pressure goes up these ig systems are weak. will have a part 3 and touch on that and solutions and such

@jonphotos8631 Жыл бұрын

U didn’t show the porting being done????

@HPRaceDevelopment Жыл бұрын

? we showed quite a bit of what was done…i cant film and port ….

@jonphotos8631 Жыл бұрын

@@HPRaceDevelopment if ur smart enough to do this work than ur probably smart enough to use a tri pod

@HPRaceDevelopment Жыл бұрын

@@jonphotos8631 so you want me to show a video of the back of my head? we have that video up - check my ktm112 video or ktm450 porting video

@adamhollins Жыл бұрын

@@HPRaceDevelopment you could use a gopro and chest mount whilst porting to get a good angle of your work, I appreciate you sharing knowledge of motor building with us i learned a lot so far so thank you and god bless you 🙏

@HPRaceDevelopment Жыл бұрын

@@adamhollins good idea to see what i see youd need a glasses view but maybe we can work that out that said our goal is to drop knowledge without putting myself out of business :)

@RonHei 7 ай бұрын

Looks like you’re sucking in a lot of fumes there buddy. Maybe you should invent a hose that can be attached to the silencer and vent it outside? Good idea? I think so.

@HPRaceDevelopment 7 ай бұрын

Come build it....

@nuthintoprove 11 ай бұрын

Leave the bling porting to Pro Circus, where they only make HP for their bikes and not customers. 2x I've been burned where stock was better.

@jpmorgen5726 11 ай бұрын

Almost unbelievable in this day and age that a factory would machine a stock head so badly!

@ncopp4358 11 ай бұрын

Not just the head. The Whole motor. A Fully modded kx112 has have the horsepower of a rm85 with a FMF fatty. They are SLOW compared to the new gen 85's

@bobbyblenio4571 Ай бұрын

Watching Gomer Balls Unbolt that Head made me Cringe…I would Never have him do Any work on my Bike after Watching That🤦‍♂️

@HPRaceDevelopment Ай бұрын

you couldnt afford it

@bobbyblenio4571 Ай бұрын

@@HPRaceDevelopment 🤣I take my stuff to Mitch Payton

@HPRaceDevelopment Ай бұрын

@@bobbyblenio4571 too bad for you

@bobbyblenio4571 Ай бұрын

@@HPRaceDevelopment 🤣🤣🤣…never had Any Problems ….don’t be ButtHurt

@HPRaceDevelopment Ай бұрын

@@bobbyblenio4571 why would i be but hurt? We kicked his kx112s ass to tune of 2 loretta’s supermini titles in 2017. You can be proud of your cheap slow build.