Honda motorcycle parts
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1970 Honda CB350K2 · Engine Parts Buying guide
The CB350K2 twin has several very different service jobs grouped here. Start with measured wear and the affected assembly, then assemble a parts order without treating every engine product as a complete rebuild kit.
Standard-size piston kitOne piston with rings, pin and clips. Two kits cover both pistons in the twin-cylinder engine.View part
Athena overhaul gasket setEngine overhaul gasket set with an explicit 1970–72 CB350K application.View part
Shift shaft sealJapanese-made 14 × 28 × 7 mm seal, replacing Honda reference 91206-286-013.View part
The standard-size kit includes a piston, rings, pin and clips for one cylinder. Both cylinders require two kits, but order only after the bores and pistons have been measured. A worn or previously rebored cylinder changes the size decision.
A gasket overhaul and centrifugal-filter repair involve different parts. The cover kit includes its guide pieces and O-ring; the Athena set addresses engine gaskets. The shift-shaft seal is a separate, dimensioned choice for a leak at that shaft.
No. It covers one piston and supplies that piston’s rings, pin and clips. Two kits are needed for both cylinders, once standard size has been confirmed by inspection.
The CB350 uses centrifugal filtration. This kit renews the cover and the named internal guide components, rather than supplying a replaceable paper filter. Follow the Honda manual for cleaning and service.
Identify the leaking joint first. A single shaft seal may be the relevant repair; an overhaul set makes more sense when several engine joints will be opened. Confirm the required pieces before buying.
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