Basic kit for improving the performance of
GX390s, 420 Predators, 13/15 hp Chinese OHVs. Simple to install, you can expect
significant performance increases.
Stage 1 Kit includes
·
Race/Open Air Filter
& Adapter,
·
HD Valve Springs
·
Offset Timing Key,
·
Main Jet for application (see Notes)
·
Pilot Jet
·
Choke Hold Down
Bracket
·
Optional
Header/Exhaust
·
Optional Carbs
(includes insulators)
Picture for reference
only and may show optional parts. See above description for actual content.
Header not included unless specified.
Filter should be sprayed with K&N type oil,
especially in dirt applications. Oil not included click here
Billet Aluminum flywheel recommended. Stock flywheels, esp
"Clone" are prone to failure and very DANGEROUS
Note: UT2s series Hondas (2012 & up) have Rev Limited coils
and will require a new coil to exceed 4000 rpm. The UT2 coils (4 wire) can only
be used with stock flywheels or 6693 ARC flywheels. If using any other
Flywheels, you must run a UT1 style coil (single wire). Most 390 “clone”, 420s,
and 460s have UT1 style coils already (However some Lifans and 420s have a
rev-limited digital ignition)
The difference in the Kits is the main jet. We recommend you check
the check your STOCK main . If stock main is a :
·
#92 thru 97, use a UT1
kit,
·
#98 thru #102 use a Hemi
Kit’
·
>102, Use a UT2 kit
Manufacturers have been know to use different jets on the
same models. So it is important to know the stock jet size
