Author Topic: Grinding stem on valves question 78 750 F3  (Read 607 times)

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Offline andy750

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Re: Grinding stem on valves question 78 750 F3
« Reply #25 on: September 23, 2018, 06:06:09 pm »
Here are Mikes pics:





Current bikes
1. CB750K4: Long distance bike, 17 countries and counting...2001 - Trans-USA-Mexico (CB750K4), 2003 - European Tour (CB750K4), 2004 - SOHC Easy Rider Trip (CB750K4), 2008 - Adirondack Tour 2-up (CB750K4) , 2013 - Tail of the Dragon Tour , 2017: 836 kit install and bottom end rebuild.
2. CB750/810cc K2  - road racer with JMR worked head 71 hp
3. VStrom DL1000 2003
4. XLR650L 2006

Where did you go on your bike today? - http://forums.sohc4.net/index.php?topic=45183.2350

Offline MRieck

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Re: Grinding stem on valves question 78 750 F3
« Reply #26 on: September 23, 2018, 06:27:49 pm »
Pics are worth a thousand. Not BS'ing. The Douche Bag that sent me this back....and I refunded his money because he "knew the material sucked" should run off the road. A jackass out of San Francisco. Rot in hell ahole. Don't prepare the stem tips properly....... this is what you get.
« Last Edit: September 23, 2018, 06:43:58 pm by MRieck »
Owner of the "Million Dollar CB"

Offline seanbarney41

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Re: Grinding stem on valves question 78 750 F3
« Reply #27 on: September 23, 2018, 07:16:12 pm »
It just so happens that I am working on an F2 right now so I got some pics of tappets.  Unfortunately, I could not get pics of the valve stem as I am not taking the head apart right now.  These are from a bike with 16,000 on the odo, which I have no reason to doubt.  I ended up replacing 4 of the 8 tappets with better ones from a scrap K3

The ones I left alone looked like this.
20180923_144833 by Sean Barney, on Flickr
Here is one showing one big pit.  The associated valve stem looked ok peaking through the inspection cover and down through the empty rocker.  The valve clearance was still correct or close.
20180923_150801 by Sean Barney, on Flickr
This one was associated with a pitted valve stem tip and was chewed to hell with over twice the recommended valve clearance showing.
20180923_153945 by Sean Barney, on Flickr
If it works good, it looks good...

Offline gschuld

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Re: Grinding stem on valves question 78 750 F3
« Reply #28 on: September 23, 2018, 07:31:51 pm »
Here are Mikes pics:





Those valve stem caps were clearly tiddly winking around, bigly😳😬😉

George

« Last Edit: September 23, 2018, 07:33:31 pm by gschuld »

 

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