Trueblue,
You can use your automotive compression tester but you probably will
need a 12mm adapter. I bought mine from JCWhitney many years ago after
I got tired of borrowing one from the bike shop. It just screws onto
your compression tester, (which are usually 14mm or a combo ... if you
tester works on a 14mm hole the adapter will fit it as it is 12-14mm).
It helps to have a compression tester with a rubber hose .. makes it a
lot easier to get into the top of those cylinders. The manual states
that you should have a maximum difference of 14 psi .. but I honestly
think if you have that much difference that you have a big problem. I
used to be able to stay 5 lbs apart on hot readings and the cold
readings were wild ... (you could see 10 lbs difference on cold
readings when the engine had very low mileage). At 5038 miles .. all
the cylinders measured either 169, 170 or 171 ... hot or cold ......
so you can really tell when things have settled down.
No need to open the airbox .. just hold the throttle wide open while
you are cranking. Pull all the plugs out before you start testing. To
keep from firing the plugs .... just disconnect the orange/black two
wire connector ... it is in that pile of wiring behind the coils near
the battery ... you will see it ... it is the only 2 wire connector
with an orange and black wire in the whole batch ....(these are your
pickup coil leads).
You need these readings anyhow .. so when you break it later you will
know how it was supposed to be ... and save yourself from trying to
fix something that isn't broke.
As far as the synthetic .. my use of the automobile version - 15w-50
mobil 1 is entirely personal ... Many people will not do this and will
only use the motorcycle version or another motorcycle oriented brand
...... everyone has their own reasons ... as do I ... This usually
does not turn out to be a great topic of discussion on the list as
opinions vary greatly ......
campbell
----- Original Message -----
From: "trueblue 28" <[EMAIL PROTECTED]>
Subject: Re: Rings seated yet?
> Thanx TC (and others) for all the information...guess I'll need to
check the
> compression. A dumb question: can I use my automotive compression
tester?
> Should the cylinders all be within 5 lbs, or...? Do you open the
airbox?
> Any instructions on checking the compression would be greatly
appreciated...
> I seem to have used about a 1/3 quart or more in the last 1000
miles...it's
> Mamalube ...but I really need to put a level on the bars as I'm
having
> trouble finding a flat place to check it.
> So it's OK to use the car stuff (say Mobil-1)? It doesn't contain
any
> friction modifiers, etc that would harm the clutch?
> They seem to hate full synthetic at my dealership---they said ANY
synthetic
> would be bad for the clutch...yet it almost feels like the clutch
slightly
> "hangs" with the Yamalube if anything...
> I can tell its time to order a manual....
> Thanx!
> trueblue
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