139qmb big bore kit instructions -

Step 2 -
Installation
Detailed installation of 139qmb big bore kit.
I'm going to show you in detail how to install a 139qmb big bore kit.
If you want to maximize the power and speed of your gy6 50cc 139qmb scooter this big bore kit has the largest displacement, largest valves and ports and is the highest quality kit available for the money.
- #SA88 -
52mm Domed Piston
52mm Bore
23mm Intake Valve
20mm Exhaust Valve
64mm Valves
Useful for the installation of any 139qmb big bore kit

[@thecoolkid1208]

I dig the UA-cam cover pic on the background 🤙🏽

[@scooterarmy]

Glad you like it!

[@seanmayo206]

I want the 51mm piston. Let's go

[@scooterarmy]

There is no 51mm

[@scooterrehab6295]

I really need to get my SA88 build going I've been swamped with side gigs lately.

[@scooterarmy]

Make that money man

[@KikoBach94]

Nice video!!!

[@scooterarmy]

Appreciate that!

[@staceythorpe9419]

Dam that kit looks amazing…and dnt look cheap and cruddy compared to others on the market..

[@scooterarmy]

Appreciate that.

[@scooterarmy]

Get one here, www.scooterarmymostlyofficial.com/product/sa88 , also available on ebay.

[@KevinHernandez-hz6kj]

Chrome bore or steel bore?

[@user-gd5lb9de9w]

Good video, are you sending this set to Russia?

[@scooterarmy]

Unfortunately the shipping cost is nearly the same as the kit cost to send to russia

[@user-lc4bc2jx1o]

Is that 52 mm a drop in bbk or did it require modification?

[@scooterarmy]

Drop in kit.. no case boring required.

[@dantickle5562]

What's the valve gaps

[@scooterarmy]

Spec is .003 to .005 inches, I run .003.

[@loserkid9973]

How many cc is the bbk?

[@scooterarmy]

52mm = 88cc , usually falsely listed as 105 or 120 cc.. biggest topend you can get for 139qmb.

[@scooterarmy]

Www.scooterarmymostlyofficial.com for more information