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Hello all VfR 800 1999 5th gen For the past weeks I’ve delved into fixing all the small and complex issues from my vfr, but it seems that I’m completely stuck with some topic in particular. Chronological Order of Events: 1. Initial Symptom: - The engine began to exhibit hesitation and jerky movements while maintaining a steady throttle position. 2. Diagnostic Code: - I’ve got a long blink indicating an error code 10, pointing to an issue with the barometric sensor. 3. Sensor Replacement: - After conducting some tests, I’ve bought a barometric sensor from a 6th generation model and installed it. 4. Resolution of Error Code: - The replacement of the sensor eliminated the error code, and normal operation seemed to resume, so I’ve continued with the repairs. 5. Throttle Valve Synchronization: - During the synchronization of the throttle valves/starter valves, I’ve encountered an issue with cylinder number 2. Detailed Issues and Questions: 1. Cylinder 2 Synchronization Issue: - Cylinder number 2 could not be synchronized; adjusting the screw only decreased the vacuum, and completely unscrewing it did not increase the vacuum beyond 1.8 cmHg. - Question: Could the mechanism be broken, or is there another issue I'm overlooking? Is it possible for a vacuum leak to affect only one cylinder's adjustment, despite all four cylinders sharing the same intake from the airbox? The hose from cylinder #2 does not appear to be cracked. 2. Power Delivery Delay: - After reassembling and testing the bike, a delay in power delivery was experienced during rapid and forceful acceleration, nearly causing a loss of control. - Subsequent testing revealed an error code 8, indicating a potential issue with the TPS (throttle position sensor). - Question: Can a vacuum leak be related to the issues I'm experiencing, including the inability to adjust cylinder number 2 and problems with the TPS sensor? 3. TPS Grounding Concern: - Research on various forums suggested that the TPS could be grounded, although the contacts appeared to be correctly in place. - A resistance measurement between the negative pole of the battery and the engine block showed approximately 200 milliohms. - Question: Is this resistance value normal? I'm not an expert, but having resistance on the engine block itself seems unusual. Please let me know if you need further assistance or clarification on any of these points. And thanks for your help!