Niatnya nyari cam CBR 250R eh malah dapet ginian, silahkan di pelajari dulu, barangkali ada yang mau aplikasi. Kalau lihat dari potonya sih ini di mesin skutik ya.
Setelah di liat-liat ada juga penjelasannya:
Reeds are one way valve used in 2 stroke engine to stop back flow .4 strokes also suffer from blow back. specialy when radical cams used .
to test we went to camshaft with 360 seat degree duration , engine become impossible to start , not even run below 7000 rpm , fuel spray out of carb , no idle.can REED fix that ?
to gain more & more power , have to go to higher & higher duration + overlap camshaft = more and more charge blow back out of engine at low and mid rpm.because intake stays open longer & longer , charge come out of carb. … not only that , more overlap means intake exposed to exhaust pressure = even more blow back ,yet it gets even worse then that:
when charge blow back out of carb , it pick up more fuel from carb , this fuel sucked again back into engine , cause rich runing and high emissions.,
this called DOUBLE CARBING , carb become impossible to tune , hard to start , not idle .. it get even worse with Megaphone ..
only at high rpms flow go back to correct direction ( and sometimes never depending on everything else..)
Reed proved to cure all of this , it clean up , rich spots gone , fuel consumption & emission down , carb tuning become a breeze , hard starting resolved.
..idle like clock .
Reeds are RZ350 after market unit sold in site , it not restrict power , at least not for 150cc.
intinya mengoptimalkan kerja pengabutan bbm deh gitu ya.. kaya kalau di 2 tak mah ada yeis, riss atau sebangsanya mungkin..