O-ring (630) Tw200 Trailway 1991 (m) Usa

If you are removing the cylinder-head for a piston/valve/camshaft inspection, and possibly replacements of some or all of those parts, then why not check the crankshaft bearings for wear and/or scoring at the same time?
Consider replacing the main tightening bolts and nuts as the old ones will have stretched threads and be difficult to torque down correctly, and, of course, a new head gasket.
One last point, also check the oil-pump is in good shape to ensure your hard work does not unravel through lack of oil pressure.
We ship globally; why not join our ever-growing customer-base of garage professionals and private enthusiasts who buy directly from Europe's foremost motorcycle parts specialist?
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Add as many items as you wish to the same shopping cart, gaskets 14B1221300 9043006014 9043006166 seals 9321026658 3P61212900 4TE1211900 and new dowel pins 9180816023 9953010114 for example, and still only pay the same single fixed price shipping cost.

Pro-workshop gasket sealant: 08C70K0234M to complete the job like a professional.

If the part shows no availability add it to your watch list and we will let you know when it is back in stock.

Please be aware that this component may have other applications within the Yamaha model range, so please ensure the part numbers you order are correct for your model?