Jetting question - Slow jet ?

[Ricky]

CR80 with FMF pipe spooges real bad. Stock main jet = 125 slow jet=52. FMF recommends #122 main and #55 slow jet. I know the 122 main jet has a smaller orifice and leans it out to reduce spooge, but I have questions about the slow jet. Does the higher number mean bigger orifice and richer jetting hence more spooge? This is my wifes bike and she tends to cruise it in the bottom of the power band, lugging it at times. Should I just change the main and leave the slow jet alone? Any help would be appreciated.

 

[Studboy]

You need to lean out the slow jet (pilot jet) as you say. There is a good tuning guide at www.ericgorr.com under the Technical Articles look for jetting. This really should be in the Mini or Maintainence Q&A forum however, this forum is for modifications and questions of the sort.