New main jet with cone filters for a 1971 Suzuki Titan

Discussion in '2 smokers' started by elioporky, Jul 5, 2012.

  1. elioporky

    elioporky Adventurer

    Oct 10, 2011
    Baltimore, MD
    Does anyone have any experience upgrading the main jets on a 1971 Titan after installing aftermarket air filters? I got a pair of those $9 Emco cone filters and I'm finding that my engine has become starved for gas. At the default float needle setting, the bike has very little power when accelerating from a standstill. As I raise the needle the power delivery improves, but it is pretty clear to me that it needs a larger jet. What size should I jump to? I'm on holiday right now and don't have the info about the current jets in front of me but I assume that it's whatever was in it when it left the factory. I'm also planning on installing a couple inline fuel filters which I hope will improve fuel delivery (or at least keep the jets a little bit cleaner!).

  2. stainlesscycle

    stainlesscycle Long timer

    Jun 6, 2008
    morgantown, wv
    what throttle position are you jetting? i assume you're not wacking it open and dumping the clutch so if it's flat at the bottom richen air screw and/or bigger pilot jet to fix lean at 0-1/4 throttle. if it's lean at full throttle than go to a bigger main jet. if it's lean in the 1/4-3/4 range raise needle.
  3. JeffS77

    JeffS77 cheap bastard

    Apr 23, 2006
    Riverside , CA
    you will probably be chaning all jets.pilots and mains ...maybe even needles and needle valves