Author Topic: 650 cam alignment issue (Read 3720 times)

Tews19 · « **on:** June 10, 2014, 05:08:26 PM »

Simple yet very vital..... Is this set up correctly?

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goldarrow · « **Reply #1 on:** June 10, 2014, 05:37:46 PM »

The mark should be at T. Then check the cam shaft again to make sure the notch is on the surface.

calj737 · « **Reply #2 on:** June 10, 2014, 05:52:41 PM »

Tews - did you use a dial caliper to verify TDC on #1? The only way to be sure your plate is correct is to do so, then set your cam with confidence. If you know the plate is right, the rest comes easier.

my79650 · « **Reply #3 on:** June 10, 2014, 11:50:39 PM »

The cam is supposed to have the notch facing forward to the front of the bike from the right hand side at TDC, put the pulsar plate back on then check, cause that looks wrong, i have a 79 and had mine out a few times. Just pop the chain off the cam and turn it to the front if you already have #4 at tdc mark. 4 is easier to check since timing it is done on the right side of engine.

dave500 · « **Reply #4 on:** June 11, 2014, 12:02:24 AM »

you have it on the "f" for fire mark,turn it to the next one (t),then be sure the notch is flush with the surface to the front or rear.

trueblue · « **Reply #5 on:** June 11, 2014, 03:26:10 AM »

Quote from: my79650 on June 10, 2014, 11:50:39 PM

The cam is supposed to have the notch facing forward to the front of the bike from the right hand side at TDC, put the pulsar plate back on then check, cause that looks wrong, i have a 79 and had mine out a few times. Just pop the chain off the cam and turn it to the front if you already have #4 at tdc mark. 4 is easier to check since timing it is done on the right side of engine.

If you turn the crank through one revolution the cam will turn through half a turn and point to the front. Forwards or back makes 5/8th sweet #$%* all difference. The only ones who think a cam can be 180 out know #$%* all about the basic functioning of an engine.

To the OP it looks to be about right, but it is a little hard to tell from a photo, where you can't look from different angles and move things around a little.

Tews19 · « **Reply #6 on:** June 11, 2014, 04:36:59 AM »

Thanks everyone for the insight. My buddy who helped me put the engine together was able to set it properly.

Tews19 · « **Reply #7 on:** June 11, 2014, 07:29:26 PM »

After doing more research I really want to make sure I did this correctly. The pic has the line facing to the rear of the engine. We had to move the came one link. My buddy who is a retired mechanic of 30 plus yrs states it is correct. I will take a pic of it tomorrow again. I want to do this correct and not jack up MRiecks head work he did

goldarrow · « **Reply #8 on:** June 11, 2014, 07:46:24 PM »

Don't matter if the notch faces 9 or 3 o'clock positions

Tews19 · « **Reply #9 on:** June 11, 2014, 07:58:55 PM »

So I'm good Gold?

goldarrow · « **Reply #10 on:** June 11, 2014, 08:01:43 PM »

Quote from: Tews19 on June 11, 2014, 07:58:55 PM

So I'm good Gold?

Should be good to go on. Good thing you caught that one tooth was off...otherwise....

Tews19 · « **Reply #11 on:** June 11, 2014, 08:03:30 PM »

Shoot I didn't. My buddy did. He helped me put the engine back together. He helped me tear down the bottom end a month plus ago. He remembered how it all went apart and reassembled off memory.

rb550four · « **Reply #12 on:** June 11, 2014, 08:29:53 PM »

Dave 500 is right ,n rotate your crankshaft to 1.4 T timing marks with the stationary pointer.
On the right hand side of the engine, align the index mark on end of the camshaft with the FRONT surface of the cylinder head.
As viewed from the left hand side, position the sprocket with the 2 punch marks level with the top surface of the head.
Put the chain on the sprocket.
Pull the chain and sprocket onto the cam shoulder. the cam and sprocket bolt holes should align.
If it doesn't align , reposition the cam chain on the sprocket until it does align.
Finger tight the bolt when aligned , then rotate the crank clockwise until you can get the other bolt in, Loctite 242 the threads install bolt 16-19 ft lbs
Rotate crank clockwise to get to the 1.4Tmark and the finger tightened bolt. Check the alignment at the stationary mark (T not F) , then recheck the cam mark is in line with the head , and the punch marks on the left hand side of the cam sprocket is in line with the head (one punch on the front , the other punch mark to the rear).
Loosen and Loctite 242 the finger tightened bolt, tighten it up to 16-19 ft lbs.
Engine oil everything and button the top end up.
Just like the Clymer manual says.

dave500 · « **Reply #13 on:** June 12, 2014, 12:40:49 AM »

then for a giggle rotate the crank 360 back to the 1/4 t mark,where is the notch facing now?

Tews19 · « **Reply #14 on:** June 12, 2014, 07:20:18 AM »

I pulled the valve cover to check the alignment once again. Cylinder 4 is at TDC. The notch in the cam is facing forward and the timing indicator is right near the F.... I take it this is incorrect?

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Tews19 · « **Reply #15 on:** June 12, 2014, 07:36:05 AM »

I rotated the crank. I believe 1 is at TDC now. I am using the straw and it is at the top... However cylinder 4 is also in the same position. This is the current state of the plate.

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Tews19 · « **Reply #16 on:** June 12, 2014, 07:39:15 AM »

Here is the current state

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goldarrow · « **Reply #17 on:** June 12, 2014, 07:41:51 AM »

Tews that looks is off. Advancer plate should be at T of 1-4, then check the notch to be parallel to the head

Tews19 · « **Reply #18 on:** June 12, 2014, 07:55:06 AM »

Ok. I now have the mark on T. Current state below.

The cam looks like this. The notch is facing the rear.... using my straw cylinder 1 is definitely at the top...

Do I undue the cam sprocket and spin the cam until the notch is forward now?

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goldarrow · « **Reply #19 on:** June 12, 2014, 07:58:21 AM »

That looks better, if the notch parallel to the head, doesn't matter if it faces forward or backward

Tews19 · « **Reply #20 on:** June 12, 2014, 08:04:45 AM »

See that's where I am confused. I didn't change anything. I simply removed the alternator cover to spin it more accurately to get the plat to T....

RB states I need it to the front, the notch that is.

goldarrow · « **Reply #21 on:** June 12, 2014, 08:08:32 AM »

Quote from: Tews19 on June 12, 2014, 08:04:45 AM

See that's where I am confused. I didn't change anything. I simply removed the alternator cover to spin it more accurately to get the plat to T....

RB states I need it to the front, the notch that is.

By the book, notch is to the front, but it could be either front or rear

Tews19 · « **Reply #22 on:** June 12, 2014, 08:21:05 AM »

Thanks Gold. Not to keep questioning you but wouldn't I have the lobes facing up if I rotated the cam to allow the notch facing forward?

calj737 · « **Reply #23 on:** June 12, 2014, 08:24:55 AM »

Sorry, Tews, but I agree with you. With the timing mark as you have it, and #1 TDC, cam mark should be forward, not rearward. To confirm this adjustment change, once you've made it, rotate the crank 360 and then confirm the position of #4.

Apologies, Gold, but I think you are incorrect in that it does matter.

Tews19 · « **Reply #24 on:** June 12, 2014, 10:39:14 AM »

So I fixed it... notch facing forward.... before I loctite can someone please confirm this is correct?

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Author Topic: 650 cam alignment issue (Read 3720 times)