GY6 Big Bore Kit Install - LIVE Series [EPISODE 2]

This is episode 2! In this episode we will show you step by step how to install a big bore kit on a gy6, also know as a qmj157. This video will included all the torque settings and specifications to build the gy6 engine. We will cover cam timing, piston ring install, and valve adjustment. Episode 3 is coming! we will get into the transmission :-)

Join our members only section to get access to even more perks:

171cc PERFORMANCE PACKAGE:

REVENO CVT KIT:

GY6 PWK PERFORMANCE CARBURETOR:

171CC DROP IN BIG BORE KIT:

171CC PERFORMANCE HEAD:

PERFORMANCE GY6 CAM SHAFT:

GEAR UP KIT:

GY6 HIGH TORQUE STARTER:

ENGINE CASE BRACE:
OPTION 1:

OPTION 2:

GY6 WIRING HARNESS:

GY6 171 COMPLETE DROP IN PERFORMANCE ENGINE:

GY6 WORK ENGINE STAND:

---------- AD ONS---------

GY6 MAGNETIC DRAIN PLUG KIT:

FUEL & VACUUM LINE:

GY6 CRANK CASE BREATHER:

---------CVT TRANSMISSION---------

GY6 DR.PULLEY SLIDERS:

CVT TRANSMISSION KIT

CVT KIT OPTION 1 (NCY):

GY6 ULTIMATE CVT KIT (REVENO)

[emanuel]

The real guru on gy6 engines the atencion and reminders to every single detail is amazing torque is a plus, #1 gy6 coach on YouTube been building my own scootz for a while thanks to you

[noahhartman]

Thanks so much Bro!! Your videos help a ton! Got the 171cc upgrade from a 150cc. Could not have done it without you!

[adambielinski]

Your explanation of of process is great ive become very good with these little engines because of your videos. Thanks for the knowledge.

[dainiermatosbenitez]

what a good job you do. your videos are spectacular. I have seen many videos of assemblies of different scooter units but none like yours. My respect for you because you do assembly work as if it were a factory, everything explained in detail without forgetting anything. my greetings

[noneshere]

Never forget to use " aviation gasket varnish " on the crankcase gaskets.
Just put a super thin coat on both sides of the gaskets before installing.
When GY6s go to belly leaking : its the death of them.
The gasket varnish glues the gaskets to the case slices on both sides.
You dont need to super torque the little bolts trying to get the belly leaks to quit weaping neither.
Then the only leaks youll get is simple crankseals.

[senlanguna]

I upgraded my GY6 150cc and used a water cooling system. Engine oil 75°c

[dicktolton]

Dude, You rock! I really, really, really, really, really, really, really, really, appreciate all the free wisdom and knowledge you drop on a regular basis. Can't wait till this F'n pandemic is over so this Canuck can get a custom ruckus from you. Bigger the better I say ;-)

[allensnook]

Who doesnt like better head, hell yeah buddy!!!snooky pa.

[chriscalderin]

The gasket you said to not get oil on I cover gaskets like that in oil so they do not stick for later service . unless I feel it is for the long haul then they would be covered in thin coat of sealant

[ninetenscoffee]

I was wondering, since casting iron might be produce imbalance centrifugal force on the stock driving pulley, will it be able to gain more significance improvement if the driving or driven pulley is put into balancing machine? I was looking for an answer but nobody does this research, i hope you see this. Thanks man! From: indonesia

[briannundahl]

What do you do with the new head? Sell it, give to owner or what? I never subscribe to anyone unless I like them so I gave you the finger and you should already know which one it is!
Out of curiosity what do you think about the Honda 150cc engines in scooters? Also I don't ask questions on people I don't like! Instead I point out where they're wrong.

[chriscalderin]

I see a timing plug! I think! is there a adjustable electric part so you can drill and move the pick up advanced and adjust for max power. I have seen cars go from slow to spinning tires with nothing but timing

[chriscalderin]

In another video you called the pair system pcv it is egr is it not? The pcv would be the line from the valve cover but without the valve. You could install a valve for more consistent carb

[mcwilliam]

Love to watch all the video.solute from Borneo(Sarawak).I have problem with my gy6....already bore block and changing piston...still using diagrams caburator...but still hard to start...wiring check all fine..only caburator sometimes leak...need help...

[johnhadley]

hi I've been watching your videos for a long time and I'm currently working on my brothers.Chinese scooter.and have been having nothing but problems with it.I'm almost positive it's the stator so I ordered a new stator and when I got it.I noticed that I ordered a 6 coil stator.and the scooter calls for 8 coil stator.and was wondering if you could answer a question can I put a 6 coil stator on wear a 8 coil stator was please and thank you.

[jeuris]

Please I need the valve cover I have all I need from your site but just missing the valve cover it sold out at your site are they going to be back on stock?

[juliodiaz]

I install today my pwk carburetor and gas started pouring out the breeding hoses and that's supposed to be breathing hoses

[ricoclaassen]

Hi from South Africa im a new subscriber. Is it possible to rebore a stock 150 barrel to 61mm and still use the origenal 150 head

[AxlMetcalf]

Would you be able to help me with some gy6 50cc stuff? I had the plan on going full naraku with a 90cc bb & valve kit but I’m curios as to how much different it will make? What kinda top speed will it see?

[aarok]

bro i siggest you to try the SYM Fiddle3 150Cc its a really cool scooter
i hope you tune it too
it reaches 120km/h i blieve you can make it goes 150km/h