My American vender got sold then they jacked up the price. Someone is selling "something like these"??? on Amazon.
Made of silicone, these o-rings are just a bit thicker than the OEM rings, great to replace flattened or broken o-rings to stop leaks, These fit all 4 covers that have the o-ring groove, Yamaha started fitting grooved covers in 1975. Grooved covers can be installed on early engines with no modification.
To install; remove the old o-rings and any traces of sealer from the groove. There are often some drips of clear coat on the flat surface of the valve cover, careful work with a razor blade will remove any drips.
Since these o-rings are nice and thick use a bit of lube to push them lightly into the groove. Install the cover and LIGHTLY and evenly snug the bolts to finish seating the o-ring into the groove. Do NOT overtighten the dome nuts in an attempt to bring the cover all the way to the head, it is likely there will be a small gap between the cover and head. This is fine, later, or at the next valve adjustment as the o-rings conform to the groove you may find the cover will finish drawing up all the way to the head.
USA buyers
PayPal.Me/gggary/10
International buyers
PayPal.Me/gggary/11
New o-ring lightly sitting on cover.
O-ring lightly pushed into groove, push in a bit in several place around the cover, don't start and force it all the way from one point, that will "bunch up" the o-ring making it seem too long.
Typical gap after tightening cover, DO NOT overtighten.
An o-ring in a cover with 100 miles on it.
View attachment 59904
The new o-ring, an old factory o-ring, razor off any clear coat drips, old silicone from the cover and o-ring groove.
Made of silicone, these o-rings are just a bit thicker than the OEM rings, great to replace flattened or broken o-rings to stop leaks, These fit all 4 covers that have the o-ring groove, Yamaha started fitting grooved covers in 1975. Grooved covers can be installed on early engines with no modification.
To install; remove the old o-rings and any traces of sealer from the groove. There are often some drips of clear coat on the flat surface of the valve cover, careful work with a razor blade will remove any drips.
Since these o-rings are nice and thick use a bit of lube to push them lightly into the groove. Install the cover and LIGHTLY and evenly snug the bolts to finish seating the o-ring into the groove. Do NOT overtighten the dome nuts in an attempt to bring the cover all the way to the head, it is likely there will be a small gap between the cover and head. This is fine, later, or at the next valve adjustment as the o-rings conform to the groove you may find the cover will finish drawing up all the way to the head.
USA buyers
PayPal.Me/gggary/10
International buyers
PayPal.Me/gggary/11
New o-ring lightly sitting on cover.
O-ring lightly pushed into groove, push in a bit in several place around the cover, don't start and force it all the way from one point, that will "bunch up" the o-ring making it seem too long.
Typical gap after tightening cover, DO NOT overtighten.
An o-ring in a cover with 100 miles on it.
View attachment 59904
The new o-ring, an old factory o-ring, razor off any clear coat drips, old silicone from the cover and o-ring groove.
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Nice one mate!
