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Cam Timing --- GS1100EZ

  • Thread starter Thread starter Flaming Chainsaws
  • Start date Start date
chef1366 said:
On the ignition at the crank look at the advance. It should say T and you should also see a 1&4. With it at the 1&4 T (top dead center 1&4) the pointer at the end of the crank should be pointed at the left pickup facing the bike.
With the engine at the proper TDC then time the cams with twenty pins between arrows.
If it is still a flame thrower you have bent or stuck valves.
Do you have clearance at your tappets?
Click to expand...
I actually just adjusted the valves an hour ago. They were tight! Now all valves are within spec.
DSCN4206.jpg


Is this wrong?
DSCN4205.jpg
 
I always found it hard to adjust my valve clearances with a full blade like that because you're angle of approach is not straight in. I modified my .004", .005", and .006 inch blades by cutting and bending the tip of it a bit. Much easier now.
 
No that's right!
Now you need to ask yourself a few questions
Is the head good?
Are the carbs good?
Is the ignition good?
I'd do a compression check to rule out the head.
Are the plug wires on the right plugs?
 
chef1366 said:
No that's right!
Now you need to ask yourself a few questions
Is the head good?
Are the carbs good?
Is the ignition good?
I'd do a compression check to rule out the head.
Are the plug wires on the right plugs?
Click to expand...
I can't do a compression check since I don't have the tool to do it :(.

Carbs? Fuel gets to the float bowls and the sparkplugs are wet with gas.

Plug wires.... Coil 1 (left) is plugged into cylinders 1 and 4. Coil 2 (right) is plugged into cylinders 2 and 3. There's a guy on craigslist selling a brand new set of green 3 ohm Dyna DC1-1 coils with the wires and caps. Should I get that?
 
FC, I've been following your other threads and I'm with "chef" - that bike should fire up nicely given all the work that you've done - so as you're still having troubles getting it to idle nicely I think something's NOT right somewhere (and i don't think the problem is something as small as valve clerances but something more serious) :(
 
Dyna coils and leads are a good upgrade anyway but I would want to KNOW what's wrong not just replace parts randomly. Though, on my bike I ended up replacing most parts... lol :p
 
psyguy said:
FC, I've been following your other threads and I'm with "chef" - that bike should fire up nicely given all the work that you've done - so as you're still having troubles getting it to idle nicely I think something's NOT right somewhere (and i don't think the problem is something as small as valve clerances but something more serious) :(
Click to expand...
It doesn't even idle. It doesn't even start! :eek:

Damn... If it's something serious, then I most likely can't fix it and can't afford it. What now? I don't want to give up on this bike but I will have to if there is any serious damage to the engine..... Unless someone has another good engine.
 
There's often members on this friendly forum who are prepared to help out a fellow GSR member if they live in the same area - so that's worth looking into - as it can be pretty hard to diagnose a fault through the forum only and having someone go over it in person is worth a lot. I'm tooo far away though :rolleyes:
 
psyguy said:
There's often members on this friendly forum who are prepared to help out a fellow GSR member if they live in the same area - so that's worth looking into - as it can be pretty hard to diagnose a fault through the forum only and having someone go over it in person is worth a lot. I'm tooo far away though :rolleyes:
Click to expand...
I posted a help thread on pnwriders.com and I got a WMRRA racer coming over to check it out :). However, I feel like he will give me bad news :(.

http://pnwriders.com/westside/155594-who-here-likes-wrench-have-some-free-time.html
 
From the speed that it was turning over with the starter i dont think there is much compression there.
Were the cam sprockets on the cams when you got them? Because the sprockets can be mounted 180 deg out as well.
 
gearhead13 said:
From the speed that it was turning over with the starter i dont think there is much compression there.
Were the cam sprockets on the cams when you got them? Because the sprockets can be mounted 180 deg out as well.
Click to expand...
Huh? I thought that it was turning kinda slow lol. I can't do a compression check without the tools though.

When I got this engine, everything was together. I checked the sprockets and they are mounted correctly.
 
Take out the spark plugs and while turning over the motor put your finger over the spark plug holes. Air should pop your finger off the hole.
If the sprockets were off I don't think the notches in the cams would be facing each other.
 
chef1366 said:
Take out the spark plugs and while turning over the motor put your finger over the spark plug holes. Air should pop your finger off the hole.
If the sprockets were off I don't think the notches in the cams would be facing each other.
Click to expand...
I will try that sparkplug/finger trick in a bit...

So, I think I want to try a 470 intake sprocket. Does anyone have one? Or would that not change anything?
 
I don't think that would matter. The 82 (some list it as 81) came with a 451 intake sprocket and 470 exhaust stock:
 
Last edited:
niclpnut said:
I don't think that would matter. The 81 (some list it as 82) came with a 451 intake sprocket and 470 exhaust stock:
Click to expand...
The pictures didn't show up but I believe you. Except my engine is a 1982 GS1100EZ, not a 1981 GS1100EX. Or are they the same engine?
 
Flaming Chainsaws said:
The pictures didn't show up but I believe you. Except my engine is a 1982 GS1100EZ, not a 1981 GS1100EX. Or are they the same engine?
Click to expand...

some parts sites have their model designations messed up and lump the 82/83 together.


From alpha sports:



1982 GS1100E,ES - CAM SHAFT - VALVE (MODEL Z)
**Qty Required Notes 112700-49810

12741-45111
SPROCKET, INTAKE (NT:30

Nic
​
 
Last edited:
I went to Babbitt's Online and looked up the 1100EZ camshaft fiche.

Here's the part numbers.

Intake sprocket --- 12741-45111
Exhaust sprocket --- 12751-47002
 
So if the sprockets aren't the problem then what? God damn this is frustrating :mad:.

I hope that I didn't waste 2 months working on this bike....
 
Flaming Chainsaws said:
So if the sprockets aren't the problem then what? God damn this is frustrating :mad:.
Click to expand...

I've just been through all of your threads... frustrating it is... you seem to have done all the right things:

... you haven't exactly cleaned the carbs but you're saying all the plugs are wet, right?
... and you're using the choke, right?
... and the float bowls are full of petrol, right?
... and you confirmed a good spark on all four plugs, righ?
... and the cams are now at 20pins apart and just a fraction off from notches facing each other exactly, right?
... the valves are in spec, right?
... the cranking speed is sufficient ...

... so one last thing would be the compression check...
... OR, really bad intake air leak inbetween carbs and the head

That's the two things I'd check next.
 
psyguy said:
I've just been through all of your threads... frustrating it is... you seem to have done all the right things:

... you haven't exactly cleaned the carbs but you're saying all the plugs are wet, right?
... and you're using the choke, right?
... and the float bowls are full of petrol, right?
... and you confirmed a good spark on all four plugs, righ?
... and the cams are now at 20pins apart and just a fraction off from notches facing each other exactly, right?
... the valves are in spec, right?
... the cranking speed is sufficient ...

... so one last thing would be the compression check...
... OR, really bad intake air leak inbetween carbs and the head

That's the two things I'd check next.
Click to expand...
I did not clean and rebuild the carbs but all 4 sparkplugs are wet with fuel.

Float bowls are full of fuel and floats are set correctly.

Good spark on all 4 sparkplugs. Got shocked a few times lol.

20 pins apart but the notches are still slightly off.

I just adjusted the valves today and they are now .005" clearance on all valves.

I don't have a compression tester but I did what chef said and my thumb got sucked down the sparkplugs hard! And then it blew back out.

So the last thing would be a very bad air leak?
 
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