MIKUNI TMX30 carburetor - 30 mm, Powerjet, manual choke for precise tuning
The carburetors from the Japanese manufacturer Mikuni belong to the reference class when it comes to perfect tunability and therefore the highest achievable performance with optimum consumption. Mikuni carburetors and parts are manufactured with tolerances of 5/1000ths. This is one of the reasons why they run so perfectly. However, you should take a little time for tuning, as the Mikuni carburetors do not run with just any carburetor configuration, but only with the right one. In return, however, they run perfectly and you don't expose the engine to the risk of it only running properly in some part-load ranges and then blowing up in one of the other part-load ranges.
The TMX 30 also offers the option of tuning the carburettor leaner in the middle speed and slide range thanks to the Powerjet jet, in order to gain power there and reduce consumption. In order to prevent leaning in the upper slide and speed range, the Powerjet jet is used there, which additionally feeds fuel into the intake flow due to the high vacuum at full throttle and high speeds.
The Mikuni carburetors react quickly to fine fuel contamination by overflowing the float chamber. Ideally, therefore, a good fuel filter should be used here.
The standard configuration of the Mikuni TM30 works quite well in most cases, but on automatic engines the secondary jet should be in the 15-17.5 range.
- Main jet: 195
- Idle jet: 40
- Needle jet: N-9 (622)
- Nozzle needle: 5EL68-3
- Starter jet: fixed
- Idle air screw: 2.5 turns
- Main air jet: 0.8 - fixed
- Power Jet nozzle: 80
- Throttle slide: 4.0
- Needle valve: 2.5
- Float level: 13 mm
- Choke control: left / button
- idle throttle screw: left
- Air screw: left
- Outer diameter front: 36 mm
- Outer diameter rear: 50 mm
- Overall length: 88 mm
- Dimension center venturi upwards: 82 mm
- Dimension center venturi down: 77 mm
- Fuel supply: left
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