<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Sounds like an air leak somewhere. Perhaps it gets overcome at full throttle or is worsened at those specific RPMs because of harmonics in the vibration of the carb. Might be a crack or flaw in the carb, but more likely it’s in the mounting, either O rings or some other flaw. They can be hard to detect and locate. You could use the carb cleaner method—spray a little at each joint or suspect area and listen for changes in engine sound. I’ve used the ultrasonic detector I use for finding leaks in surfboards to some effect, a leak sounds like a calliope, but there’s a lot of other noise to sort it from. <div class=""><br class=""><div><blockquote type="cite" class=""><div class="">On May 3, 2015, at 8:40 AM, Jim Gray via Fot <<a href="mailto:fot@autox.team.net" class="">fot@autox.team.net</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class="Section1" style="page: Section1; font-family: Helvetica; font-size: 18px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman';" class=""><font size="2" face="Arial" class=""><span style="font-size: 10pt; font-family: Arial;" class="">I just installed my webers and I’m running into something not covered in anything I’ve read so far.<o:p class=""></o:p></span></font></div><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman';" class=""><font size="2" face="Arial" class=""><span style="font-size: 10pt; font-family: Arial;" class="">At cruise speed which I do on the street, 2500 -3000 RPM my exhaust gas temps on # 4 are 100 plus degrees<o:p class=""></o:p></span></font></div><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman';" class=""><font size="2" face="Arial" class=""><span style="font-size: 10pt; font-family: Arial;" class="">over # 1and will climb to 1400 if I stay at that throttle setting. Under wide open throttle they equalize and seem<o:p class=""></o:p></span></font></div><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman';" class=""><font size="2" face="Arial" class=""><span style="font-size: 10pt; font-family: Arial;" class="">to settle in at about 1300.<o:p class=""></o:p></span></font></div><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman';" class=""><font size="2" face="Arial" class=""><span style="font-size: 10pt; font-family: Arial;" class="">However, I think this may be symptomatic of my other issue. When I’m tuning the idle air screws, open them up until<o:p class=""></o:p></span></font></div><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman';" class=""><font size="2" face="Arial" class=""><span style="font-size: 10pt; font-family: Arial;" class="">it starts to miss & so on, I can get a predictable stumble from three out of the four screws.<o:p class=""></o:p></span></font></div><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman';" class=""><font size="2" face="Arial" class=""><span style="font-size: 10pt; font-family: Arial;" class="">The screw on # 3 has no effect on the idle no matter how far I run it in or out.<o:p class=""></o:p></span></font></div><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman';" class=""><font size="2" face="Arial" class=""><span style="font-size: 10pt; font-family: Arial;" class="">Also , when I put my syncrometers on #’s 3 and 4 they are significantly different.<o:p class=""></o:p></span></font></div><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman';" class=""><font size="2" face="Arial" class=""><span style="font-size: 10pt; font-family: Arial;" class="">I’m not going to get my dyno tune before the first race in two weeks so I’m left to figure it out on my own for now.<o:p class=""></o:p></span></font></div><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman';" class=""><font size="2" face="Arial" class=""><span style="font-size: 10pt; font-family: Arial;" class="">Any help would be greatly appreciated,<o:p class=""></o:p></span></font></div><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman';" class=""><font size="2" face="Arial" class=""><span style="font-size: 10pt; font-family: Arial;" class="">Jim g<o:p class=""></o:p></span></font></div><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman';" class=""><font size="2" face="Arial" class=""><span style="font-size: 10pt; font-family: Arial;" class=""> </span></font></div><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman';" class=""><font size="2" face="Arial" class=""><span style="font-size: 10pt; font-family: Arial;" class=""><span id="cid:image002.jpg@01D0859E.4E6C1EE0"><image002.jpg></span><o:p class=""></o:p></span></font></div></div><span style="font-family: Helvetica; font-size: 18px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: inline !important;" class="">_______________________________________________</span><br style="font-family: Helvetica; font-size: 18px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=""><a href="mailto:fot@autox.team.net" style="color: purple; text-decoration: underline; font-family: Helvetica; font-size: 18px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class="">fot@autox.team.net</a><br style="font-family: Helvetica; font-size: 18px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=""><br style="font-family: Helvetica; font-size: 18px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=""><a href="http://www.fot-racing.com/" style="color: purple; text-decoration: underline; font-family: Helvetica; font-size: 18px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class="">http://www.fot-racing.com</a><br style="font-family: Helvetica; font-size: 18px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=""><br style="font-family: Helvetica; font-size: 18px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=""><span style="font-family: Helvetica; font-size: 18px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: inline !important;" class="">Donate:<span class="Apple-converted-space"> </span></span><a href="http://www.team.net/donate.html" style="color: purple; text-decoration: underline; font-family: Helvetica; font-size: 18px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class="">http://www.team.net/donate.html</a><br style="font-family: Helvetica; font-size: 18px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=""><span style="font-family: Helvetica; font-size: 18px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: inline !important;" class="">Archive:<span class="Apple-converted-space"> </span></span><a href="http://www.team.net/archive" style="color: purple; text-decoration: underline; font-family: Helvetica; font-size: 18px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class="">http://www.team.net/archive</a><br style="font-family: Helvetica; font-size: 18px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=""><span style="font-family: Helvetica; font-size: 18px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: inline !important;" class="">Forums:<span class="Apple-converted-space"> </span></span><a href="http://www.team.net/forums" style="color: purple; text-decoration: underline; font-family: Helvetica; font-size: 18px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class="">http://www.team.net/forums</a><br style="font-family: Helvetica; font-size: 18px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=""><span style="font-family: Helvetica; font-size: 18px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: inline !important;" class="">Unsubscribe/Manage:<span class="Apple-converted-space"> </span></span><a href="http://autox.team.net/mailman/options/fot/bill@ponostyle.com" style="color: purple; text-decoration: underline; font-family: Helvetica; font-size: 18px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class="">http://autox.team.net/mailman/options/fot/bill@ponostyle.com</a></div></blockquote></div><br class=""><div apple-content-edited="true" class="">
<div style="color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; " class=""><div style="color: rgb(0, 0, 0); font-variant: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; " class=""><div style="color: rgb(0, 0, 0); font-variant: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; " class=""><div style="color: rgb(0, 0, 0); font-variant: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; " class=""><div class=""><font face="Comic Sans MS" class=""><span style="font-size: 14px; " class="">Bill Babcock</span></font></div><div class=""><font face="Comic Sans MS" class=""><span style="font-size: 14px; " class=""><a href="mailto:Bill@ponostyle.com" class="">Bill@ponostyle.com</a></span></font></div><div style="font-weight: normal; font-style: normal; " class=""><font face="Georgia" class=""><span style="font-size: 14px; " class="">Editor: Ponostyle</span></font></div><div class=""><font face="Georgia" class=""><span style="font-size: 14px; " class=""><i class="">Celebrating Water</i></span></font></div><div style="font-weight: normal; font-style: normal; " class=""><font face="Georgia" class=""><span style="font-size: 14px; " class=""><br class=""></span></font></div><div style="font-weight: normal; font-style: normal; " class=""><font face="Georgia" class=""><span style="font-size: 14px; " class="">Editor: Xtreme Geezer</span></font></div><div style="font-weight: normal; font-style: normal; " class=""><i style="font-size: 14px; " class=""><font face="Georgia" class="">Fitness and Fun After Forty</font></i></div><div style="font-weight: normal; font-style: normal; " class=""><font face="Georgia" class=""><span style="font-size: 14px; " class="">503.936.7660</span></font></div><div style="font-weight: normal; font-style: normal; " class=""><font face="Georgia" class=""><span style="font-size: 14px; " class=""><a href="http://www.PonoStyle.com" class="">http://www.PonoStyle.com</a></span></font></div><div style="font-weight: normal; font-style: normal; " class=""><font face="Georgia" class=""><span style="font-size: 14px; " class=""><a href="http://www.Xgeez.com" class="">http://www.Xgeez.com</a></span></font></div></div></div></div></div>
</div>
<br class=""></div></body></html>