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 RUclips cover pic on the background 🤙🏽

[@scooterarmy]

Glad you like it!

[@scooterrehab6295]

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

[@scooterarmy]

Make that money man

[@Scooter-q2s]

Those 52 mm kits rip when dialed in right 👍

[@seanmayo206]

Them dam cir clips done got 2 of my cylinders. Question? Can the a9 cam work on 64mm valves as long as bridge is for 64mm

[@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.

[@KikoBach94]

Nice video!!!

[@scooterarmy]

Appreciate that!

[@ScooterMods]

Quick question,
my valve adjustment nuts and 1 stem recently backed off the rocker assembly ... it fell down into the bottom of crankcase..
What should I do? And would it cause harm down there if I leave it in the oil?
I tried draining it and fishing it out. I can find anything there
I didn't see it come out in pan when I did the oil..
Can you give me some advice on what to do here?
And the severity of the outcomes? If it can make it's way back up?

[@scooterarmy]

@@ScooterMods well. If it went down with the chain and just made it's way to the case bottom it may be ok. Hard to say. 5heres a potential of damage. What was it, the nut?

[@ScooterMods]

It was I ended up turning the bike completely upright and getting it with a magnet..
I'm looking for one of your kits?
Any chance you have any in stock soon?

[@seanmayo206]

I want the 51mm piston. Let's go

[@scooterarmy]

There is no 51mm

[@КитайГуд-ц3ш]

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

[@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

[@KevinHernandez-hz6kj]

Chrome bore or steel bore?

[@JeffreyDjRTBEdwards]

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.