Valve cover gasket - Yamaha YFZ450 Forum : YFZ450, YFZ450R, YFZ450X Forums
 
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post #1 of 8 (permalink) Old 06-12-2019, 08:43 AM Thread Starter
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Valve cover gasket

Hey guys , I'm needing to replace my valve cover gasket/seal on my 07 yfz due to leakage, just wondering if I need any sealant for the gasket or does it go straight on? Also are the gaskets all the same size on every year? Thx
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post #2 of 8 (permalink) Old 06-12-2019, 11:41 AM
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Yes, you need some sealant. I think Yamabond of some kind but not sure which one. Every year of carb model should be the same. Not sure if the EFI models interchange or not.

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post #3 of 8 (permalink) Old 06-12-2019, 03:33 PM
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Service manual says yamabond or equal. I donít remember if I used 1211 or anything at all.whoops lol. I know ther wasnít much on there too clean off when I took the cover off.
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post #4 of 8 (permalink) Old 06-19-2019, 08:21 AM Thread Starter
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Yeah I ended up using yamabond, now I have an issue , when I go to put the the cover back on there's a gap which causes a leak , no matter how tight I I do the 2 top screws it seems to not press together enough!! It's like the gasket is too thin (obviously not)
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post #5 of 8 (permalink) Old 06-20-2019, 09:30 AM
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Quote:
Originally Posted by fabbyfz View Post
Yeah I ended up using yamabond, now I have an issue , when I go to put the the cover back on there's a gap which causes a leak , no matter how tight I I do the 2 top screws it seems to not press together enough!! It's like the gasket is too thin (obviously not)
Take it off and do another application of a gasket maker?

2019 YFZ450R SE
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post #6 of 8 (permalink) Old 06-20-2019, 09:50 AM
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Did you let the gasket maker dry before starting it up?

2017 YFZ450R XC Setup - OíNeal Racing, Leatt, 4Arm Strong, Engine Ice, ASV Inventions, Ryno Power, ODI Grips, AMSOIL, Sunstar Engineering, Braking, Acerbis Plastics, Kenda Tires, SCOTT, Peak Racing Products, RadicalX

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post #7 of 8 (permalink) Old 06-20-2019, 11:43 AM
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Quote:
Originally Posted by fabbyfz View Post
Yeah I ended up using yamabond, now I have an issue , when I go to put the the cover back on there's a gap which causes a leak , no matter how tight I I do the 2 top screws it seems to not press together enough!! It's like the gasket is too thin (obviously not)


No you donít need sealant. Although a small bit in each corner will help keep the gasket in place while you put the cover on. The two bolts on top are not supposed to exceed 7.2 ft/lb. You either tightened them to far and warped the shaped of the cover. Or at one point your engine got so hot that it warped the shape of the cover.


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post #8 of 8 (permalink) Old 06-20-2019, 11:54 PM Thread Starter
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Cheers for the input guys, I retried the whole process and all went well this time..
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