True 20mm Carburetor, PrePressed 49/17 Gears, A9 Cam Performance Scooter 139QMB

Description

STG Scooter Performance Kit
for
50cc to 100cc 4-stroke engines -
139QMB and GY6
Includes: STG A9 Performance Cam,
20mm Performance Carburetor, & Pre-Pressed STG 49/17 Performance Final Drive Gears
***United States supplier. Shipping from Grand Rapids, Michigan. Ships via USPS Priority Mail. ***
***Most orders have same day shipping, and arrive within 2-3 business days!***
This
Scooter Performance Kit
by
Scooters To Go
is a quick, easy, and inexpensive upgrade for your stock 50cc or already modified scooter. These kits consist of the first parts recommended to upgrade by
Scooters To Go
, and they are the same parts used on their 87cc Racing Engines. These kits also consist of the parts that allow your big bore'd engine to be used at it fullest potential. Customers can expect a
top speed gain of 3 to 7 MPH
, and a noticeable
increase in acceleration
.
What's Included & Specifications
A9 Camshaft
-High Quality Steel Production
-Long Life Ball Bearings (2)
20mm Carburetor
- CVK style carburetor
- 20mm intake-side outlet
- 38mm filter-side inlet
- #82 Main Jet
- #34 Idle Jet
- Accelerator pump
- Automatic electric choke (2-wire)
- Unsealed and rebuildable
49/17 Performance Final Drive Gears
-Pre-pressed for quick installation
-2.88:1 Final Drive Gear Ratio (usually 3.41-3.71 stock)
-High Quality Steel Construction
-Angled Teeth to Reduce Noise
What benefits does A9 Camshaft offer?
The A9 camshaft is the most highly recommended performance camshaft for the 139QMB and GY6 engines. These camshafts feature a
longer valve opening duration, and higher lobes
for further opening. Customer's can expect to see a
noticeable gain in performance, greater top speed, and more power at higher RPM's
.
What is better about this 20mm Performance Carburetor than the other "performance" carburetors available?
There are a a lot of carburetors out there claiming to be 20mm, but instead they are only drilled out, and do not have a
true 20mm butterfly valve
. These carburetors are the real deal, and they are exactly what you need if you are looking for more power from your modified scooter engine, or even your stock 50cc scooter.
Why would you want to consider changing your final drive gear ratio?
Often times, these engines are only geared to maintain speeds up to 45 MPH, and speeds beyond that result in an engine over-revving. Scooters with 12" wheels typically see over 11,000 RPM's at speeds around 50 MPH, and it is only a matter of time before you burn out crank bearings or drop a valve into the cylinder. These engines remain stable below 9,000 RPM's, which is why
Scooters To Go
highly recommends this final drive gear ratio. These gears allow your engine's RPM's to stay lower, and keep your engine in its optimum power range.
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We sometimes offer special prices on parts and accessories, only available to Facebook fans.
www.facebook.com/scooterstogo
*30-day (unlimited mile) warranty does not cover product failures that result from improper customer installation, improper air/fuel ratio tuning, failures that result from other engine component failures, engines exceeding 8500 rpm's, improper oil servicing, fuel contamination, or foreign object ingestion. If a customer experiences a product failure, the component must be shipped to Scooters To Go, at the customer's expense, for quality assurance and verification purposes.
If you have any questions, comments, or concerns about this product, our warranty information, or our returns policy, feel free to message us via eBay, reach us through Facebook, or call us @ 877-569-5691.