The Power Modification thread

[RustyRodder]

We have a the big bore thread, and a bunch of other threads for exhaust, getting a bit more out of these, etc. Figure maybe we can try a thread similar to the tire thread.

Below is a chart with some of the common things included. It may help newbies, or track what works/does work better than all the threads. Should be easy to compare and search different setups too. Comments on reliability, top speed, etc would be welcome.

Chart could be added to posts by quoting this or copying. So thoughts?

Part​	Part Installed​	Notes ​
Exhaust
Intake
Camshaft
Head/Big Bore Kit
Spark Plug/Fuel Controller
Gearing
Tires
Other
Comments/effects of modifications

 

[kelvinhoss]

Part	Part Installed	Notes
Exhaust	De-cat and remove spark arrest
Intake	NK Racing	Stock air box
Camshaft	Yuminashi SS241	CJR sprocket advanced 4 deg
Head/Big Bore Kit	Stock	Pcx150 injector
Spark Plug/Fuel Controller	EFIE at 250mv	Ngk plug 9 heat range
Gearing	13t front 38t rear	X ring chain
Tires	Shinko 244s 3.00
Other	kitaco oil pump	motul 300v 10w40 90oct ethanol free
Comments/effects of modifications	Gps’d 54 on flat, able to climb hills in 4th gear	I’m 260lbs in

Very nice chart sir!

 

[JPMcGraw]

Part	Part Installed	Notes
Exhaust	Yoshimura GP-Magnum
Intake	NK Racing\Takegawa foam panel filter	No Snorkel
Camshaft	Takegawa N-15
Head/Big Bore Kit	Finbro Super Head 3.0/Yuminashi 143	Everything clears
Spark Plug/Fuel Controller	CPR7E9/EFIE@250	170cc Injector
Gearing	14/40
Tires	k262 2.75/3.00
Other	Milk Crate, Takegawa Oil pump
Comments/effects of modifications	The 170cc injector makes it smell like a go-kart at idle	93 E10

the KOSO Mini AFR shows around 13:1 at cruise, 12.2:1 at slow speed 5-10% throttle, and around 12.5:1 at WOT that creeps up to 13 the closer to 55 i get.