Jitsie Needle with Clip PWK 28MM Carburettor

• OEM-quality needles for Keihin PWK 28 mm carburettors
• precision-machined for consistent fuel metering
• includes adjustable clip for fine-tuning throttle response
• available in multiple profiles (JFH, JJF, JJG, JJH, JJJ, JJK)
• JJH is the standard needle for most trials bikes
• direct replacement for the original part

The Jitsie needle with clip for Keihin PWK 28mm carburettors are precision-manufactured to OEM quality standards, ensuring consistent and accurate fuel delivery across the throttle range.

The needle controls the fuel mixture from approximately ¼ to ¾ throttle. It works together with the main and idle jets to fine-tune throttle response, smoothness, and power delivery. Adjusting the clip position changes how early or late fuel flow increases — essential for precise carburettor tuning in varying riding conditions.

• JFH – leaner taper / smoother, softer power delivery
• JJF – slightly richer midrange / improved throttle response
• JJG – medium-rich / balanced performance for most setups
• JJH – standard needle used in most trials bikes / strong, consistent power with smooth throttle response
• JJJ – rich overall taper / ideal for colder conditions or tuned engines
• JJK – richest needle in the range / maximum fueling for high-performance setups