Tracer 900 Throttle Bodies and Spark Plugs

2019 Yamaha Tracer 900 (Base Model) 

I just completed the second check of my throttle bodies sync, using my Digi Sync Vacuum Manometer (See July 2020 Original Post), and spark plug replacement. I'm performing this maintenance at 6,000 miles, which is 2,000 miles short of the intervals, because I'm launching on a trip that will extend well beyond the interval threshold. 

I have some video on this maintenance that Tracer owners may find useful.

Not to spoil it, but the throttle bodies were in reasonable sync at this 6,000 milestone as was the case during the first synch check.

Super Sherpa Fork Spring Rates

Details and dimensions on the front suspension components on my North American Model Year 2002 Kawasaki KL250 (Super Sherpa).

Fork Details and Dimensions:

• Front Travel - 9.1" (230 mm)
• Fork Type - Dampening Rod
• Inner Fork Tube Diameter - 1.42" (36 mm)
• Fork Air Pressure - Atmospheric +/- 0 psi
• Fork Oil - 10w, 10.14 oz each per change, 11.93 oz each per disassembly
• Fork Preload Adjustment - None
• Fork Compression Dampening - None
• Fork Rebound Dampening - None
• Spring Length - 573 mm (Service Limit 566 mm)
• Spring Length, My 2002 Model Year, 7,000 miles - 22.5" (571 mm)
• Spring Outer Diameter - 28 mm
• Spring Inner Diameter - 24 mm
• Spring Thickness/Gauge - 4 mm
• Spring Number of Coils- 43
• Spring Rate - Unknown

I am currently running 1 inch spacers on the front forks to compensate for the lack of preload adjustment. 

I recently replaced the seals and wipers with an All Balls Kit P/N No. 56-120. At that time, and after several hundred miles, I replaced the fork oil with Maxima 20w Fork Oil. I had been running a 10w mineral oil.