new engine build need so thoughts!

O

obesepolice

Member
Well I finally pulled my bike back out of the shed to finish it like a year later lol, anyway i want to build a new engine for it. I really just want a motor with alot more prep. I also considered getting an Arrow motor. Im just looking for any suggestions you professionals may have.

Here is the planned build so far.

dax IV bottom end
Arrow reed setup
Ported third port jug from Arrow (already have this part)
RT carb (already have)
SBP expansion chamber (already have)
Puch HI HI head (already have)
ramped and cut piston
lightining CDI
40t sprocket.
Getto Bike mounts
 
While I'm not a professional, your build list looks pretty well thought out to me.
I assume the ported cylinder is designed to work with the reed setup since it's also arrow?
Be aware reeds will give very little gain in actual power unless the porting is done to maximize the benefits.
You will also have some tuning to do to get the pipe where you like it. Use the length of tubing between the exhaust port and the start of the cone to move the powerband where you need it. Longer headtube usually moves the power lower in the rpm band while a short headtube usually favors high-end power. You might also find a fatter cone will help if your cylinder breathes really well. I love the KX60 pipe myself for a really good small cc two stroke. The extra volume helps give it a snappy feel and the hit is nice and easy to tune. Takes some custom fabrication to get it nicely packaged on a bicycle though.
 
im still testing but im using an internal reed with over 200mm of area good enough for a 18mm carb and a true trail ported cylinder and piston. offroad is king. ice racing etc.

anything you have purchased so far is gp styled and nutless besides the pipe and massive carb.then when you complain they say " should spend 300 on a shift kit".
 
correction a 500 dollar engine thats worth 120 bucks w a 20 dollar external reed is what your pointing at venice. no carb and is not optimum. 600-1000 dollars later it would be ok for flat road :) more money than brains....
 
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