Special tool for 750's valve adjusters

Ernesto

Ernesto

Hero member
Location
Hamburg, Germany
Hello,
if you still have the original adjusters with the square heads,
get yourself a clock key no.5 (3,5mm female square).
Cheap and holds the adjuster well when you tighten it.

Ciao, Ernesto

 

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thanks for that Ernesto, I still have those and was thinking the other day that I should look for something to make it easy. Cheers :)
 
when I had a 750 I had some tools laser cut - I'll have to check how many I have but I recall I have the square and oblong ones cut. PM me if interested. US Based - the cost is shipping.
 
I find the best method is to use a Dial Indicator on the Rocker Tip to measure the Gap. The best, in my opinion, is to insert a whittled down Feeler Gauge between the Cam Lobe and Cam Follower. You can NOT get an accurate measurement using a Feeler Gauge between the Rocker Tip and the Valve - Perhaps if you File the Wear Conical smooth between the Rocker Tip and Valve Top you may get some degree of accuracy.
 
Simplest method of adjustment with screw and locknut rockers is to use the adjusting screw as a micrometer. If for example the required valve clearance is 0.25mm and the pitch of the thread on the adjuster is 1mm then correct clearance is a quarter turn of the adjuster from closed, using this method also compensates for any wear in the top of the valve stem.


   
    Keith
 
Keith: That's a Good One - Never thought of that (Lay her flat on the Heel and Back her OFF as per Thread Pitch). Will have to Practice it and check with a Dial Indicator until I get her down pat and make a Note on the Turn for Intake and Exhaust for future adjustments. After 45 years of mounting this ride you never stop learning ;o)

By the way does any one know what the SF Rocker Arm Ratio is - I had it market down at one time but lost my record. You need this Info if setting Tappet between Cam Lobe and Follower. With a Cam Follower Rocker the Ratio does change somewhat dynamically but if I recall the ratio was considered 1:1 making both measurements between the Heel of the Lobe to Follower and between Tappet to Valve the same - Correct me if I'm Wrong - The Green Book may have the Rocker Ratio Specs - I think I measured it at the time but now I can't rermember.

Another thing I've noted is that you can be out by as much a 001"+ when you Clench the Nut and Set Screw.
 
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