Question about 2000 Harley Davidson FLSTF Fat boy

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How to replace umbrella valves 1998 fatboy - 2000 Harley Davidson FLSTF Fat boy

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  • Harley Davidson Master
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This is fairly easy on the Evo engines.

Remove top of rocker box cover.
Ease up old valve (not a good time for gorilla tactics here), being careful not to pull valve off of stem, leaving stem in the hole.
A little spritz of WD-40 down the stem might help.

Position new valve stem into hole, push down on center of valve until stem pops into hole.
If difficult, a dab of oil might help.
After insertion, GENTLY pull up on edges of valve to make sure stem stays in hole.

Replace rocker box top cover, repeat for other rocker box.

Go for a ride!

Posted on Apr 16, 2014

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Posted on Jan 02, 2017

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1 Answer

How do u replace umbrella valve in rocker box cover


Hi Nathan, no pull the old one out and lube the new one with oil then use a pair of needle nose or duck bill pliers to pull the rubber pointed end through the hole, trust me it will stretch skinny. Get back to me if you have any more questions. Do you have a service manual? For $6.50 you can download one at the website below:
http://harley.manuals.cc/
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Welcome to harley ownership, been through this often on my bikes. The air that is displaced in the crankcase during operation builds up pressure and travels through the motor out to your air cleaner. Based on the age of the bike (no disrespect whatsoever), the umbrella seals more than likely could use replacing. What happens is the displaced air is really a mist of oil and air and as this travels up through the engine its last stop is the umbrella seals, which look like a very small umbrella with a short shaft. The bad news is that unless you want dig into the top end of your motor you are probably going to more comfortable having your shop replace these for you. If you decide to do it yourself repost and we will go from there. Also there are some after market parts that work pretty well too to help most are around $200. Hope this helps.

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