Camshaft locks up

[seasicksid]

Hi. I've just replaced the head gasket on my 2000 GS500e. Now when I tighten the cam shaft holders the cams lock up. I have them in their correct positions. A and B front left and right, C and D Inlet. Any suggestions please?

Sid
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I can resist anything, except temptation

[virus]

sure youve got the cam timing right?
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own: 81 xs1100g...
owned: 85 rat CG (sold), 91 GS500e (stolen), 84 gsx400f (scrapped), 81 z250 (siezed, siezed, scrapped), 83 cb250rs (sold), 84 gpz750r ratfighter (killed) 84gpz400 (sold), '80 cb650 ratfighter (wrote off) 95gsx6/12f ratfighter (killed) 91 xj900 (sold)
stinkwheel Well I just had my hands up a pigs fanny. Which makes your concerns pale into insignificance.

[BanditsHigh]

[seasicksid]

My thoughts also, at first so I re checked and timing is spot on. I even tried it without the cam followers and chain connected. When I tighten the cam clamps they actually grip the cams. It's doing my head in because I laid everything out in the order and the position it came off.
I must be missing something, or the cam clamps have shrunk!
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I can resist anything, except temptation

[A100man]

Is it possible to have the inlet and exhaust cams swapped over?
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Now: A100, GT250A, XJ598, FZ750

Then: Fizz, RS200, KL250, XJ550, Laverda Alpina, XJ600, FZS600

[stinkwheel]

Have you put the cam caps back on the exact place and orientation they came from? Not mixed them up at all.

Pretty sure older suzukis had line-bored cam caps. So they machined them in-situ with them bolted to the head. You have to put them back where they came from. I remember it being a thing with the old GS1000 that you could crack them if you put them in the wrong place and tightened them down and if you cracked them, the head was scrap.
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“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[seasicksid]

[seasicksid]

[WD Forte]

I don't know that particular engine but know on all the ones I have done there was always a process which must be followed
OR ELSE!
These processes usually start by checking/locking the crank in a certain position before even thinking about fitting the camshaft/s setting up timing
OR ELSE!

Have you RTFM?
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bikers smell of wee

[seasicksid]

Yes, I did that. Marked everything. Engine has not moved
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I can resist anything, except temptation

[BanditsHigh]

[WD Forte]

As before I dont know the engine but do know the cams will have to be fitted in a particular attitude in respect to the position of the crank/pistons.
It appears you've got this wrong somewhere.

My advice, whip em off, RTFM and fit again carefully following the
procedure in the manual.
Which manual do you have to refer to?
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bikers smell of wee

[Pete.]

What do you mean by lock up? They won't turn or the engine won't turn or what?

When you install a camshaft on a multi-cylinder bike there will always be a valve that is not shut so there will always be a load on a cam lobe.
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a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good

[jeffyjeff]

Also, it is important to draw the camshafts down as evenly as possible, by tightening the cam cap bolts in a criss-cross pattern, and in several stages, a little at a time. You can't just tighten the caps down one at a time (first A, then B...). If you do that, you risk binding the camshaft, which is what appears may be happening.
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History shows again and again how nature points out the folly of men - BOC

[A100man]

Did you check for bent (even slightly) valves when you had teh head off?
____________________
Now: A100, GT250A, XJ598, FZ750

Then: Fizz, RS200, KL250, XJ550, Laverda Alpina, XJ600, FZS600

[seasicksid]

[virus]

were these the cams that came out of this head and youve heard it run before?

Sounds like some plastiguage might be in order to measure the clearance.
____________________
own: 81 xs1100g...
owned: 85 rat CG (sold), 91 GS500e (stolen), 84 gsx400f (scrapped), 81 z250 (siezed, siezed, scrapped), 83 cb250rs (sold), 84 gpz750r ratfighter (killed) 84gpz400 (sold), '80 cb650 ratfighter (wrote off) 95gsx6/12f ratfighter (killed) 91 xj900 (sold)
stinkwheel Well I just had my hands up a pigs fanny. Which makes your concerns pale into insignificance.

[Pete.]

[A100man]

Seen this..?

https://www.youtube.com/watch?v=KmfkhLE0Cog
____________________
Now: A100, GT250A, XJ598, FZ750

Then: Fizz, RS200, KL250, XJ550, Laverda Alpina, XJ600, FZS600