Originally Posted by rogergendron1
the grubee gt5 on the last pic has the mods listed. high comp head, port and polish with extra 3rd transfer port ground, tunned x chamber exhaust from arrow, arrows reed valve intake, delorto 16.16mm sha carb, and a modified piston ie .. ramps cut to modify transfer port timing and exhaust duration, and better bearings.
sells for like 600$ but can be built for less than half that if you have the mechanical know how
The Arrow Motorized Cycles Street Racer sells for only $499
$85 CR Machine billet head.
$55 Torquer II pipe
$85 reed block
$65 Pro reed ported cylinder
$90 PRO assembled
GT 5 SkyHawk motor
The lower end bearings are not changed because there is nothing wrong with the stock ones which I think are Japanese in the Skyhawk.
I don't think there are any piston ramps on the Arrow Street Motor.
It does have good port timing though. I will ask Dave.
The best mod bang for the buck is an expansion chamber.
What do you mean by a straight pipe for a 2 stroke?
Straight pipes sort of work on 4 strokes.
The Rock Solid reed valve is a joke as it is sized for a 30 cc motor not these 66cc to 69cc motors