- May 17, 2003
Shortenened version jetting notes for '95 KDX200H1, PWK35 (stock), ram valve, FMF-30 rev, TC-1 spark arrestor, mx2t @ 40:1, FRP torque ring (no jetting significance), 91 octane, Wiseco piston, 2600' elevation, humidity around 30%. Bike likes 42 pilot, Air Screw 1 turn out for most applications, 162 main jet. Any leaner on main makes for hesitation or flat spot on "snap to WOT" (snap to WOT means cruising just off idle and snapping the throttle to Wide Open Throttle). 162 main makes good plug color on 1/2 mile WOT run at max RPM with BEN/4 @86 degrees F. Modifying the Throttle Valve (slide) #5 to approx #6 (cut leading edge up 1 to 1.5 mm---exactly 1.5mm lower than #7 TV) improved mainly 1/8 to 1/4 throttle (leaned it out, not blubbering now) and slightly improved idle to 1/8 throttle(but not enough, still blubbers). A high clip position on needle (like #2) leans out needle straight section and really helps blubbering on BQx, BEx, CEx, and R1174K (stock needle), but introduces a hesitation on snap to WOT. A low clip position (like #5 or maybe #4 on some of the above needles) really reduces the hesitation and hit and makes for a more linear power curve, but increases blubbering on straight section (off idle to around 1/8 throttle). My best needle for over 90 degrees at 2600'(or cooler at higher elevations), 42-162, AS-1, TV#6(modified #5) is BEN/4. It only blubbers to 1/8 throttle, has linear pull on snap to WOT, plug - dark tan, great top end power, some hit when KIPS opens. It starts to have a flat spot on snap to WOT when below 90 degrees. My best needle from upper 70s to 90 degrees at 2600' (or cool high elevations) with same settings is BEN/5. It has more blubbering on straight section, but more linear power - less hit - stronger bottom, has great lower mid range to top end power. Plug - dark tan to light brown. Best all around needle. My best cool weather needle (below 80, or low elevations) same settings, is CCN/3. It has the strongest bottom - most linear power, virtually no hit, slightly less blubbering than BEN/5, strong top - barely softer than BEN/5 (power barely less crisp mid to top than BEN/5. Plug - dark tan to brown, sometimes darker if riding around at 1/8 throttle. Can feel richness when chopping throttle through bumps or landing from jumps. Backing AS out to 1.5 brings back a flat spot. C needles seem to be more sensitive to AS adjustment than B needles. Needles tested: R1174K/1/4/5, CEL/2/4/5, BGQ/5, DCQ/2/4, CEP/4/5, CCN/2/3/4, BEN/4/5, BEQ/5. Pilot jets tested: 38, 42, 45, 48. Main jets tested: 155, 160, 162. Throttle valves tested: #5, #6 (#5 modified to approx. #6), #7(which was so lean it tried to idle near red line - even with my richest possible jetting). My #7 TV doesn't have the cut out relieved area around the bottom of it like my stock slide does. It just has filled in tapered area all the way to the bottom edge. BTW, This is my 1st internet post of any kind.