Page 1 of 1
advanced timing
Posted: Sun Feb 20, 2005 10:33 pm
by vette76
does a spree have a key that holds the flywheel to the shaft? i found a special key for a pocket bike that advances the timing. is this a good idea?
check it out. here it is.
http://cgi.ebay.com/ws/eBayISAPI.dll?Vi ... eName=WDVW
Posted: Sun Feb 20, 2005 10:55 pm
by vette76
what is the purpose of the reed valve, and how does it work?
Posted: Mon Feb 21, 2005 9:08 am
by noiseguy
1) You could probably machine something to advance the timing on the Spree, but you would need to watch/listen for predetonation. You could blow a rod if it's not set up right. A dyno would be a good way to tune this.
2) Reed valves open when outside pressure exceeds inside pressure. This lets fuel in at the right time, just like intake valves on 4-strokes. Go to the MacDizzy site and look for info there.
Posted: Mon Feb 21, 2005 12:49 pm
by vette76
noiseguy wrote:1) You could probably machine something to advance the timing on the Spree, but you would need to watch/listen for predetonation. You could blow a rod if it's not set up right. A dyno would be a good way to tune this.
2) Reed valves open when outside pressure exceeds inside pressure. This lets fuel in at the right time, just like intake valves on 4-strokes. Go to the MacDizzy site and look for info there.
does a spree have a key like this and would it fit?
Posted: Mon Feb 21, 2005 1:32 pm
by noiseguy
Not likely.
Posted: Sun Feb 27, 2005 12:21 am
by Tippmann98
That is a good idea for a mod. I may look into this