- #MIKUNI TM40 TUNING MANUAL PDF#
- #MIKUNI TM40 TUNING MANUAL INSTALL#
- #MIKUNI TM40 TUNING MANUAL FREE#
If the bike picks up speed or power as you slightly back off the throttle then you are too lean on the main jet. When the bike is pulling cleanly at a good high RPM & wide-open throttle slowly back off on the throttle to about 7/8 throttle. Main jet - To test the main jet selection, run the bike at wide open throttle in 4th gear on a level road. If the bike surges or otherwise does not hold a steady speed easily and smoothly, raise the needle (lower the clip). Needle position - Choose the (leanest) lowest needle (highest clip) position that allows the bike to smoothly hold a steady 45mph in 5th gear. From that point turn the mixture screw outward 1/8 to 1/4 turn. Turn the mixture screw inwards until the idle speed drops slightly. We have also included the Mikuni HS40/TM40 tuning manual.Īdjusting the idle mixture screw - With the motor fully warmed up (after 10-15 minutes of spirited riding) and the mixture screw 3 turns out from lightly seated. We have included a selection of jets to accommodate a wide range of modifications, elevation and conditions. Bikes with stock muffler will likely need a smaller main jet. These settings will work great for most XR650Ls with the snorkel removed from the airbox, an aftermarket air filter andĪftermarket muffler. Loosen the carburetor clamps and rotate the TM40 to the right. Needle and jet changes can be done without removing the carburetor from the bike. Turn the handlebars fully left and right to make sure the cables do not bind or cause the engine to rev. Start the bike and adjust the idle speed with the white plastic knob on the left-hand side.
#MIKUNI TM40 TUNING MANUAL FREE#
The opening cable should have a very small amount of free play. Make sure they work smoothly and do not bind in the housing.
It fits in the top position of the cable bracket.
#MIKUNI TM40 TUNING MANUAL INSTALL#
Install TM40 into the carburetor boots and tighten the clamps.Remove carburetor from right hand side of bike.Remove throttle cables from carburetor.Remove the screw that holds the rear brake reservoir.
#MIKUNI TM40 TUNING MANUAL PDF#
XR650L TM40 Installation Instructions (See available PDF for printable version)īe safe – no smoking or open flame.