Re: cam timing

« Reply #13 on: February 05, 2007, 02:35:35 pm »
Hello, here's som pics and parts of manuals for the chain & shaft
driven classic V4's.
I will try to explain as good as poosible,
my english writing is not excellent but ok to understand I hope.


I do have a VF1000F engine here for repair
but I have not started the work yet.
The engine needs new cams, rockers, tensioners,
and at the same time I will plane the heads and fit new
head gaskets. + an oilmod. So I have taken some pictures.

Click the links and you will find the camshaft install info from the
VF1000F & F-II manual, VF750F manual and VF750 & 1100 manual (shaft)
+ my pictures from today with text.


------------------------------------------------
About the workshop manuals :
Yep, the first editions had errors, books from Honda,
Clymer but also Haynes.
It's different versions of these workshop manuals ...

It's always smart to record all small differences
before stripping down the engine, because all 8 of the punced marks
on the sprockets are not often 100% aligned with the head egde.
Sometimes it looks like the sprocket are 1/2 teeth wrong one way or another.
so it's easy to use some extra time on this..
It's also very important to not mix up the parts - of course....


Left rear - No 1 cyl
Left front - No 2 cyl
Right rear - No 3 cyl
Right front - No 4 cyl
Firing ordrer :
1-2-3-4 Shaft / 1-4-3-2 Chain


Cam ID :
ER = Exhaust rear.
IR = Intake rear.
IF = Intake front.
EF = Exhaust front.
You will find the ID on the camshaft
where the sprocket are placed.
All of these ID's should face UP at the same time
at T 1-3  !!!  
If you cant see the marks, turn the engine one full turn.
On the other side of the cam theres often another
mark like "R2" "R3" means release numbers...
The cams on the pictures are R2, I don't know
if the other releases has the same details/notches
like R2 for VF1000F.
Install the cam closest to the camchain guide mounted
in the engine first, not the guide fitted on the tensioner -side
(which side depends on shaft or chain drive model)

The difference between the 750 models are
just that everything is opposite from shaft to chain,
because of the opposite engine rotation.

( Btw: In the Haynes book for VF750/1100 Shaft drive models,
there's also an mistake,
because after the installation of the rear cams
the engine must be turned clockwise (shaft drive)
from T 1-3 (directly) to T 2-4. But the engine must be turned
to T 2-4, then to T 1-3 and at last to T 2-4 again
to get the front camshaft installation correct. )

The front cam installation at T 2-4 is described in the
small pdf manuals here, in details, but ...
It's also some small marks/warts at the sprocket 6 teeths from
the T 1-3 line mark on the VF1000F engine cam sprocket, to help you.

These extra marks must be aligned with the
head edge at T 2-4 front.
At this point the camshaft lobes should point
straight away from each other on front cyl 2 (left)
and straight against each other at front cyl 4 (right)
It's also a good idea to use a little locktite on the
sprocket screws..

Double & triple check everyting after the installation
at the T 1-3 mark.

I'll hope this will help you.

 

------------

Right click on link,
and select "Save as" to save the file on your computer.


-------------- Chain drive ------------



http://www.honda-v4.com/sabmag/download/vf1000f-camtiming.pdf

http://www.honda-v4.com/sabmag/download/vf750f-camtiming.pdf

T 1-3 pictures VF1000F

http://www.honda-v4.com/sabmag/download/t1-3-01.jpg

http://www.honda-v4.com/sabmag/download/t1-3-02.jpg

http://www.honda-v4.com/sabmag/download/t1-3-03.jpg

http://www.honda-v4.com/sabmag/download/t1-3-04.jpg

http://www.honda-v4.com/sabmag/download/t1-3-05.jpg

http://www.honda-v4.com/sabmag/download/t1-3-06.jpg

http://www.honda-v4.com/sabmag/download/t1-3-07.jpg

T 2-4 pictures VF1000F

http://www.honda-v4.com/sabmag/download/t2-4-01.jpg

http://www.honda-v4.com/sabmag/download/t2-4-02.jpg

http://www.honda-v4.com/sabmag/download/t2-4-03.jpg


------  Shaft drive ----------

http://www.honda-v4.com/sabmag/download/timing1.jpg

http://www.honda-v4.com/sabmag/download/timing2.jpg

http://www.honda-v4.com/sabmag/download/timing3.jpg

http://www.honda-v4.com/sabmag/download/timing4.jpg

http://www.honda-v4.com/sabmag/download/cam_tensioner_poke.jpg

Regards Svein T., Skien, Norway.
V45 Sabre -83, V65 Sabre -84
www.honda-v4.com
« Last Edit: February 17, 2007, 03:34:05 pm by SveinT »