Hi, can someone please confirm that the A65 cam shaft rotates in a clockwise direction, viewed from the timing side?
Many thanks.
While I'm pestering you all, can someone say what compression pressure I ought to be reading on my compression tester please? (I'm getting 105 psi on both cylinders but expect that to improve once the new piston rings bed in)
Many thanks,
Dave.
Hi Dave,
The camshaft rotates clockwise looking from the timing side, same as the crank but the Idler gear with the timing bits on rotates anticlockwise as it is between the other two.
Just to recap on the timing setup. Take the plugs out to make it easier to rotate the engine. Put it in 3rd gear and rotate the engine to get the pointer lined up on the line on the rotor - bring the engine forward to this point take up any slack in the timing gears. On the timing side set the pick up stator plate mid point in the adjusting slots. With the rotor loose turn it until the screw head is visible in the lefthand hole and tighten the centre screw to secure the rotor. This should be good enough to get the engine running. As the electronic ignition has a 'wasted spark' it does not matter which cylinder was on compression. As already mentioned a good battery is essential.
I have run a Boyer on an A65 for well over 100,000 miles and only had to replace the pickup plate as it somehow got wet and only produced a very weak spark.
The compression for a 9:1 compression 650 is listed as 65-70 on the first kick with 140-145 average. It does however say that the engine should have both plugs removed, the throttle be fully open and it should be hot. As you say it should be better after bedding in.
Dave.
Dave, that is an excellent explanation... Thank you very much.
My problem, apart from being Captain Thicko of the 'Plank regiment', is that, having not even removed the drive side cover, I've done all my work from the timing side- apart from pushing the timing stud/ bolt into the crankshaft slot to locate the correct-ish timing position...
Can it be done this way or should I take the driveside cover off and start doing it properly.... (you know by now that I will do whatever is right.... eventually)
Thanks again for clear and concise explanation Dave.
Best regards,
Dave
Hi,
The peg should work just as well but if you want to use a strobe to get the timing as spot on as it can be, you will probably need to use the pin in the case and the line on the rotor. To be honest if you are careful with the static timing you will get it pretty much spot on.
Dave.
Again Dave, thank you.
I'll see how far I get with this and let you know how it goes.
No doubt I'll be taking the drive side cover off and doing it properly later....
Regards,
Dave.
Right then Dave, I did as you suggested and timed it from the rotor (drive side) to 34 degrees (fully advanced)..... I even made up my own timing disc using a CD and protractor.
And still it wouldn't start.... I definitely prefer your method though dave, it's kinda how I always used to time engines up.
So tomorrow I'm borrowing my mate's rolling road race bike starter, getting some Shell V-power unleaded, a pair of new plugs... and see where that gets us.
I'll let you know how it goes....
Thanks again for the help and advice....
Regards,
Dave.
Hi,
Make sure they are not those plugs that have a porous ceramic insulator. I think the 'C' in the number denotes so so avoid those.
Dave.
Right then, having dropped the drive side case off, I have checked timing the old fashioned way... with a proper timing disc.
All looks spot on, unless you can see something awry with the pictures......
I also removed the rocker cover and confirmed that I had set the tappet gaps correctley.... I had.
So it's on to the rolling road on Tuesday (when my mate can help me with the mauling around)
Can't use my strobe until I get the damn thing running.... but it's waiting ready in the wings....
Naturally, when I tightened the last cover screw up (lightly) the thread wasstripped (not me guv, honest) , so I had to remove it again and fit a thread insert...
I'll let you know how it all goes...
Good morning,
The second image showing the timing setup has the rotor magnet lined up in the righthand hole. It should be the lefthand hole. Like this you have the timing set somewhere ATDC and not BTDC. Check what I put a few posts back.
So with the engine as you have it now for the photo, loosen the timing rotor and turn it to get the the magnet lined up with the other hole and it should be spot on.
Dave.
I'd love for you to be right Dave but the Boyer diagram shows it as the hole to the right of the Transformer pickup... (Mind, that's my interpretation....)
On top of which, I originally had it timed to the other hole when I'd misinterpreted the crankshaft rotation....
Let me know what you think mate.... Please.
Mind, the (Green circled (clockwise cam)) diagram shows the rotor/ magnetic thingie (?) direction clockwise- which can't be right.....
The rotor actually goes anticlockwise showing that what you say is correct ie the magnet is past the pickup as the piston starts to go down.
I'll move it back to where you say.
I was so caught up in reading the instructions that I kinda failed to look at the physical information in front of me when I looked at the engine.
Boyer Bransden and their 'camshafts'....
Sorry for doubting you Dave.
And thanks again mate.