Joyner 250SV Performance Upgrades

*Modifications interact with each other, consult with Joyner owners for combinations fitting your needs*

CONTRIBUTORS
pghruby
Glade

RELATED THREADS
topic-t15217.html
topic-t15071.html

CVT
15/16/17/18/19/21 Gram Sliders (Dr. Pulley)
2500 RPM Torque Springs -Blue (Polini)
RED Torque spring (MRP)
RED Torque spring (Malossi)
Variator (Dr. Pulley)
Hit Clutch (Dr. Pulley)

Note: Slider weights will change with sprocket mod.

Electrical
35Ah Battery
Performance coil
Performance CDI(adjustable)
Performance CDI (rev delimited)

Engine
NGK Iridium spark plug

Transmission
10/11/12 Tooth sprocket (Buggy Junkies)

Intake/Carb
2" 2-stage UNI filter with K&N cover
Main jet (size depends on elevation)
3/8" fuel line
K&N filter
Outerwear
30 mm slider carb
30 mm pumper carb
32 mm pumper carb

Exhaust
Silencer
Note: Intake mods are fine without changing stock exhaust.

Suspension
Fox 2.0 Non Coil Over Air Shock

Body
Sport Roof Rack

Tire/Rim options
12x7 2+5 black steel rims on all four corners
25x8-12 Dunlap KT122 front tires
23x10.5-12 Kenda 8-paddle rear tires

See this thread: http://www.buggynews.com/topic-t15217.html

pghruby, thanks for the Great Start!!!!

Darren at Buggy Junkies has 10, 11 and 12-tooth transmission sprockets for the CFMoto engine.

http://www.buggynews.com/topic15071.html

This is a list of every mod that I have done on a Joyner 250

Intake

K&N
Outerwear
rejet stock carb
30 mm Pumper carb
32 mm pumper carb

Electrical

Performance coil
Performance CDI(adjustable)
Performance CDI (rev delimited)
Iridium plug

CVT

15,17,18,19, 21 gram sliders
Blue Polini Torque spring
RED Torque spring(shorter/stiffer)
DR. Pulley Variator
DR. Pulley Hit Clutch

You would be p pleasantly please by the amount of performance gained by these mods. There is more in these engines than allowed at factory settings.

Glade

Thanks Glade.

What brand are these? or who from?
Performance coil
Performance CDI(adjustable)
Performance CDI (rev delimited)
What is the RPM of the red spring

I'm trying to be as detailed as possible, if you have time.

Anyone else with additions or can we move on to Blade?

2007 model

Adjustible CDI
HP coil
32mm MRP pumper carb
K&N filter mounted directly to carb
15 gr. sliders
Blue torque spring
3/8" fuel lines, new shut off valve, high volume fuel filter
Rotated and raised gas tank(eliminated about 1 ft. of fuel line)
Removed all EPA gunk
Interco Swamp Lite tires slimed

Thanks rockrunner!

06 model
17 gram sliders
blue torque spring