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« on: March 24, 2021, 09:29:01 AM »
I would say if you're just replacing that shaft because of the splines being worn, just get the correct shaft.
After 30 years many motors have different year variations of parts in them.
To answer your question, if you want to use the shaft on the right that you just bought, you would need to change the clutch cover, gears, collars, and thrust washers to complete the 85-87 parts package.
A few areas off the top of my head that this can happen is the transmission gearing 5-6, kicker assemblies, shaft,gear, and cover, cranks/pistons,
water pump shaft/impellers, and clutch rods/ bearings/and pressure plates.
They will interchange through the years, only if you use all the matching parts that coincide with that group of parts. This would make a great post to the tech section if there isn't one already.
I cant say if the Honda manual shows these differences or not.
You can year class those kicker shafts visually by the length of the area that the gear rides on them= Just below the snap ring in your pictures.
Left in your pic with the longer bearing surface below the snap ring 87-88
Right side in your pic with the shorter bearing surface below the snap ring 85-87