remember the gaps on piston rings have to be in a certain position as the ring gaps shouldnt line up with other ring gaps

As an aviation mechanic, the best way to find TDC is just hold your finger on the spark plug hole and rotate until you feel compression, by using an aluminum welding rod or coat hanger laying on top of the piston continue the rotation until the rod start by down, that TDC.

Top speed and performance review will be VERY soon. Waiting for the piston to break-in just a little. 😁👍

I was your 600th subscriber 😫. Getting my hawk 250 pretty soon and I’m getting more and more excited finding such good videos like these! Keep up man I’ll be along for the ride

I really enjoyed seeing your work and can't wait to see your next video on the gains made .

Nice video you made here I never had a chance to cover installation of the big bore so I’m happy someone took the time to do so!!

Your cam operator is great she needs a raise 😆

Haven't watched yet but man I've been waiting for this one, literally just now got the notification

I really learned something you have a gift of teaching .

Thanks for the video, really appreciated. You make doing my bore upgrade a whole lot easier 👍🏽👍🏽👍🏽

Very good thorough instructional video. Great watch and great job

Really looking forward to the performance test on this. Thanks man!

nice tutorial wasn't planing on watching it all but you've made it so good and so interesting to watch . you're a good sensei I must say . good job

Great tutorial, looking forward to the next video.

Worth mentioning when you installed the rocker box you did get the torque correct at 20ft lbs for 3 12mm bolts that hold it in place!! As well the head torque spec was also correct at 24/25ft lbs so again good job on the install video!!

Thanks, for sharing all that knowledge.

When installing rings on any four stroke piston install the oil ring first then the two control rings that go above and below the oil ring. It's a lot easier that way because the oil ring has a lip on the top and bottom inside edge of it that sits behind the control rings. It's hard to explain but if you look closely at all three oil rings you immediately see what I'm talking about. Now let's see how many keyboard mechanics disagree with me on that lol. I'm just saying that method has ALWAYS worked for me and I've built my fair share in the last 30 years!

Nice Tutorial, im looking forward to doing this im just waiting for my kit to come in

Nice video can't wait to see what the Top Speed will end up being

I enjoyed that so much, excellent outstanding video you worded everything simple, add professionally, I definitely give you five stars rating for that ...

Awesome work👍🏻

Excellent instructions.

one of those sleeves is called a wrist pin 😁and should double check ring end gap too 😉 good vid bud 👍

You make great videos Moto ♥

Been debating going to the 300cc jug, and want to thank you for this video. Real help.

Awesome! I'm going to do this to a brozz. Thanks for the great video and all of your vids. Geaux Saints

Sweet Hawk!

Enjoyed your video. I am a mechanic by trade, you did a pretty good job. (And I'm going to use some of your nomenclature with my co-workers because they work and they're unique (Pushrod Actuators = Rocker Arms for instance) -- good stuff, thank you for taking the time to show all the ins and out of swapping a piston and jug).

Aliexpress is Great ! I ordered my 300cc jug kit on Jan 5, it arrived on Jan 12 ! 1 week, WOW !

Thank You ! Purchased the jug and piston kit from Aliexpress. Coming late jan. My Hawk does 72mph. Shooting for 80+! made a wind fairing from a grinder visor. Works !

I’d love to see a video on your carb tune and setup with this

Great tutorial! Ty

I always put a towel on engine crank case hole when messing with wrist pin clips so nothing can fall in crankcase, cause I never want split case to get something that fell in the crankcase hole out. Lol But awesome tutorial on rest.

Sweet vid...

Great video. I'm planning on getting a hawk and start playing with it. Can you please recommend the big bore kit you used, there's a lot of them at different price ranges and I'm not really sure which one to use...thank you so much, again great content

Link to the BIG BORE KIT motocultparts.com/products/true-70mm-250cc-power-cylinder-and-piston

I feel like I missed something here, this kit brings the engine to a 70mm bore and still 65 stroke leaving the displacement at 250.15cc. I'm not seeing how the cylinder wall would be thick enough to be bored out to an actually 300cc.

So, I'm in California where HAWK is not allowed to be delivered from Amazon probably due to smog, but I'm starting to realize why Harley Davidson is so loved. HAWK was made to be tinkered with, and in doing so you get to learn EVERYTHING about motorcycles and I think that is a huge appeal. There is a relationship between you and your bike and this makes it stronger.

Stuff rags around the rod and over the crank case before pulling the piston pin clips just in case you do drop it, you don't want to pull the cases apart!

Cool video

Dude thank you. Not many good videos on these china bikes. My TBR7 had 6k on it and is still pushing. All a stock besides gearing and cosmetics like the bars wheels and stuff like that. I’m ready to beef the engine up a bit.

a tiny scewdriver works great for removal of piston pin circlips

So first thing nice job bud,so I just picked up this hawk bike darn thing runs good but the intake carb boot is bad ,so I got a couple questions, to install a new on do I have to take my tank and breather box or cam I just wezell the carb outta ther and install the new one . Thanks and keep up the info it's vary helpful..Thanks agin

not sure if i missed it but the rings especially top and middle the gap should be 180 degrees apart.. oil ring same thing.. also its called wrist pin through piston and connecting rod from crank. :) also good to put a bit more oil on the rings for insuraction of piston in the bore. just helps with first start to prevent scoring of the cylinder walls. good job.. :) enjoyed it.

Great video! I’m gonna be picking up one of these bikes shortly, but I’ll wait on doing this. How’s the bike doing today?

KOOL, NOW MORE PEOPLE CAN IMPROVE THE PERFORMANCE OF THEIR'S.

FYI GUYS. "D" is a manufacturer mark for the company "DONGYA", DY means top ring and D means bottom, other companies like ATG for example will have "ATG" as top ring and "A" as second ring. Orientation doesnt matter as long as you can tell which is which by rubbing your fingers against the ring like he said which is corect. So in this case D will be the Scraper ring NOT THE COMPRESSION RING like hes showing (according to the manufacturer) and also "IN" on the top of the piston DOES NOT MEAN Inside the frame or whatever he stated.. IT MEANS "INTAKE" VALVE! so the "IN" means the piston needs to be orientated facing the INTAKE valve side of this engine and not the EX or EXHAUST!. has nothing whatsoever to do with the inside of the bike frame. just my .02.

I took off the odometer but I'm pretty sure I've got over 150 hours on my Hawk 250 real off-road riding and wheelies because I stripped it but lately it's been making a bunch of noise from the top end of the engine I bet I'm going to have to replace valves and The Jug including the piston

Bro, you didn't gap the rings? Pretty ballsy move considering the source of your parts. Appreciate the video, always enjoy watching horsepower mods on these Chinese bikes.

Hey man. Great video. Could you provide a link to the bore kit? I can only find a water cooled modle

Did you check the gap on your rings? I want to watch an update of this guy to see what the 300cc can do compared to the factory 230

We wanted to see it run! …..and a 0-60 run.

I am in Ecuador and this is a great video for me and my Daytona adventure 250. But can you tell me where to get the big bore kit here.

Please tell us the brand of kit you received. I got the DVNOP brand with the coated flattop piston. Had Austin Auto Machine turn the sleeve down to 74mm. Put the pin in the piston and connecting rod. Slid the piston carefully over the rings. OMG, the piston top was a full 3mm below the deck of the cylinder jug !!!! put it together anyway and managed to get it to run. put compression gauge on 50PSI of compression.

this tutorial is so simply stated,with exquisite videography,i think i can change mine out,what hp increase are you expecting? top end?

Great video. Could you please let me know where I can order the 300 kit.

are you gonna do a video on a test drive after the big bore kit install

Been interested in doing something similar on my 125 it doesnt add much tho its still all the same gearing as stock

has anyone done a dyno before and after this upgrade? I am curious about how many HP that superhawk has.

I could be wrong but I believe this kit increases your bore size from ~67mm to 70mm and leaves the stroke the same (~65mm). If this is the case it increases the displacement from 229cc to 250cc. That being said, for the price it still seems worth it and kind of awesome.

Was the piston pin 16 or 18mm? Thank you

I have a question all these Chondas that are being built so they all use the same motors? I wonder if the Bashan 250, Xpro250 and the XMoto 250 or the Apollo 250 are clones of the CRF 230?

Please provide the manufacture of the bug bore kit, and/ or part number.

Great tutorial! I am curious what kind of gains you will get. I just might try the DLX out if you can gain 25% more power. I am also curious if you could buy a water cooled cg300 and fit it on a Hawk without too much custom work.

Какие ваши впечатления от нового поршня, как изменились характеристики двигателя?

Did you have to machine the cylinder sleeve at all? and the piston pin was 18mm?

IN doesn't mean it points in, the engine is in the middle of the bike so any direction you point is out; IN means Intake Side of the head.

How is your piston rod going to like that big bore kit? As I understand that Rod is for a 67mm piston and the crank shaft is designed for a 67mm piston and the bearings too, so it will be fun to see how it goes for you in the future.

Great video! How is it running with the 300cc top end? Did you do any port and polishing to your head?

where did you get the big bore kit from, and will it work with the dlx fuel injected hawk?

I've got a BD50-7 ( AKA xpro 250).....I was wondering if this kit would work for mine even though it's fuel injected?.....by the way, awesome tutorial, always love anything I can find about these Chinese bikes....I think the quality coming out now from companies like cfmoto,and the affordability of these bikes are going to really take over within the next five years.....we should start seeing a lot more china bikes out here in the near future

Please, Moto Taco show a picture of a compression gauge psi reading with the gauge still hooked up. Please tell us the brand/manufacturer of the kit as you showed the parts on a styrofoam packing thing. Thank You ! P.S. Enjoy the Daytona 500. It is coming on soon on FOX.

Nice first time seeing this video I been thinking of buying one to go cruising does this upgrade work in all 250cc hawks or in some models only

When is the 300cc review coming I can’t wait 💪🏿

So did it give you more power and more top end speed?

You ever looked into swapping a 2 stroke motor into one of these china frame? Anybody you can point me towards? I been looking at a kx80 kdx80 cr80 cr125 2 stroke type of deal. The kdx 80 2 stroke looks like it will bolt right up with 15hp and great torque.

Where did you purchase parts from? this might be in my future.

Do they make appropriate-sized heads for the 300cc bore kit ?

I was wondering if your were going to post the top speed

Wrist pin, not a sleeve Piston rings should be gauge in the cylinder before installing on piston. Most rings will have a dot or number that faces up. If you have a arrow on top of piston means arrow faces towards exhaust . If you have new gaskets, use them

What jet are you going to use on your carb?

Hey I have a 2021 Chonda Hawk 250cc aka 230cc I’m trying to put the 300 bore kit on it myself is there a link or website that you ordered yours from ? That would be great if so I’m interested in doing it to mine

Shouldn’t you run a aftermarket head of your going with a bigger cylinder for best performance?

So will the aliexpress big bore kit be a direct bolt on to the tbr7?

Would this kit work on the DLX fuel injected hawk?

Did the stock jug have 250cm3 stamped on it?

Assuming the Magician 250 and Hawk 250 are basically the same motors, would you believe this would be the same process? I'm looking to order a Magician here soon just to have fun with and modify.

Can I be done to the fuel injection 2 or no?

how would it work, if i have v-twin 125xl honda varadero engine.

How much more speed or power did you get from the big bore kit

Did I go past the ring positions? Make sure all the ring openings are not lined up.

Will this big bore kit work on the Lifan KPX250?

Is the hawk 250 engine the same as the loncin re 250?

Can you put a pinned comment parts list for the aftermarket, I'm having a hard time finding the right exhaust

How much engine life should I expect to lose on average when installing a BBK?

Base on the bore and stroke of a stock Hawk 250, engine displacement is 229cc, after installing this bore kit the displacement will be 250cc

Are the vibrations even worse then stock with the new bigger piston or did it stay about the same?! My bike at 60 will make my hands go numb after about 15 mins lol

If you’d stuff a clean rag into the case beneath the piston, you wouldn’t have to worry about dropping something into the crankcase!!!

hello, this engine which is a jongshen 250 cc. is not delivered with an oil radiator. I see that in the video your bike has an oil radiator... will you ride it?... or is it already like that?... can you tell me where to connect the return and return of this oil radiator?... THANKS

What parts are needed I want to do a bore install on mine but what is needed