head kit ..wat the

[barnsey]

hey guys
i bought this so called "5 port high compression it head kit" (which i some how dont think ita 5 port) a while ago for my first pb how ever it never went on and today i doung it up in a box un a pile of junk..
when i took a good close look at it.. well its ebay quaility as thats where i got it from how ever just above the exhaust port ther is a tiny little thing that looks like a boost port only real tiny is this a bad barrel or is it ment to be there..
also i herd matty c, say "hc cranks are better for heavily modded bikes" in another post so i was thinking is it better to use a stock barral and crank and get rd to put boost ports in it set squish and lighten piston if he does that would that be better than the ebay thing i have ??? thanks guys
here is a link

[1968falconxt]

that port above the exhaust is for pollution or something. it is on every 49cc cag barrel made.

you will get much more power out of a 2 piece head kit with a half crank/or full crank, then you will with a ported stock head

[barnsey]

also what would have less problems ported stock or ebay one and yes it is a 5 port =0 ??

[1968falconxt]

the other head wont be any better quality. just use the ebay one, port it or use it stock. it will be just as reliable so long as you tune it right and set the squish correctly

[mac90]

ment to be there its to do with cylinder scavenging & infact the oppisite of a polloution device

[RD RACING]

your both wrong, sorry but that little cut out above the exhaust port is there for compression release. remember these engines are really whippersnipper engines and having this cut out helps releive some over compression when the whippersnipper is being started, compression release.

[1968falconxt]

does it affect performance when running?