Edelbrock used my bike to make a "Quick Silver" carb for the WR450. We Dyno'ed it with a dirt tire so the numbers are low by somewhere around 12% but max HP was 38.5 with both the stock and Quick Silver carb. Although ridding the WR with the Edelbrock seemed to produce a lot more power! No clutch, 3rd and 4th gear wheelies. The QS is a pretty cool carb, jet less. To change the jetting all you have to do is turn a knob on top of the carb. That "mis" at 1/4-1/2 throttle is gone with the QS. I know a lot of folks are having a hard time jetting the stock carb on the WR and with the Edelbrock it's effortless.
After some trail time I'll do an article on ORC about it. Contact Rob Barnum for more info : http://www.barnumspr...ductweb_014.htm
Edelbrock to make a aftermarket carb for the WR450!
Posted July 14, 2003 - 06:00 PM
Posted July 14, 2003 - 07:02 PM
The WR has always had hopelessly confused jetting. You could probably improve upon it with a Bing.
Try doing that to a YZ, or a WR with proper jetting.
Much easier to just change a few parts to YZ spec. than put the Quiksilver in there.
Just my opinion...
Posted July 15, 2003 - 12:26 PM
Posted July 15, 2003 - 12:40 PM
I had an edelbrock quicksilver carb on my xr650r and honestly it was 1000x better the the stock keihn(sp.?) carb.
The XR doesn't have a FCR, but it is a Keihin. I don't think it has a pump, so that may have been part of it.
But did you ever get the stocker properly jetted? Like the WR, the XR is jetted a bit weird due to the breathing restrictions as delivered.
Posted July 16, 2003 - 01:37 PM