"1982 GS 550 Cam Timing "No Start"

[curtie94]

Funny you say that. I just checked compression using my thumb and its good.

I just pulled my carbs again, I'll go through them one more time, make sure the choke passages are clean.

With the carbs out should I be able to stay starting fluid directly into the intake and get it to start or not?

When I pulled my carbs one of the throttle slides was stuck wide open. Could that have been a factor?

[tom203]

" I just turned the sprockets on the cam then bolted them back. "

Huh? You mean as in remove the sprocket bolts and rotate sprocket 180 degrees and rebolt?? I hope that I'm misunderstanding you!

[curtie94]

That's what I meant.

I took the sprockets off before and want sure what the correct way to bolt them on was.

[curtie94]

I just checked the manual and I have the sprockets on correctly now. the notches face eachother. Could I be a tooth off on the crank? I only ask because everything is timed correctly until I install the chain tensioner and then the crank moves a little and im not 100% perfect like I was before. It seems like the crank moves but the cams dont.

If I rotate the crank so that the notches are exactly pointing each other, then my cam timing mark is flush with the case, BUT my crank timing mark is halfway between the T and the F on the advancer.

[curtie94]

Ok how about this.

If my cam timing is off by lets say a tooth, would the bike still run?

Like I said it turns over fine and every once in awhile it pops like it is trying to start buts thats it. Could I put rags over the carb intakes just to see if it is a air box leak?

[Nessism]

How about posting some photos showing the timing, including the 1-4 T mark alignment? Load them on photobucket than link the IMG code here.

[curtie94]

Will do tomorrow. Ill get some pics of the timing marks.

[tom203]

See this pic- note exhaust cam marks, etc. see how cam lobe on #4 exhaust is pointing forward.Also note #4 intake lobe is facing rear wards. Are yours close to this ?image.jpg

[Nessism]

Make sure the crank is aligned like this too...

[curtie94]

Yes my marks are exactly like that. So it seem that my cam timing is perfect.

But the thing still does the same thing. Turns over fine but only pops, it doesn't start.

I checked the plugs and only one of them was actually wet the others are dry, so it seems that I'm not getting fuel to all of my cylinders.

I guess I'll go through the carbs and check the pilot circuits.

[curtie94]

It seems like I am 180* off. It backfires once in a while as well. It still pops like its trying to start too

The thing that gets me is on the cam sprockets there are wear marks where it looks like it was bolted but it is spun 180* from there in order to be by the book.

My engine looks just like the pictures that where posted.

Cam lobes by cyl 4 are opposite from each other, the notches point each other. And the 1 arrow is flat with the case with 1-4 T lined up with Mark.

[curtie94]

Ok so how many links are there supposed to be between the intake and exhaust cams.

In the picture of the cams from tom203 there is 19 links. It's it supposed to be 19 or 20?

[tom203]

It seems like I am 180* off. It backfires once in a while as well. It still pops like its trying to......
My engine looks just like the pictures that where posted.

Cam lobes by cyl 4 are opposite from each other, the notches point each other. And the 1 arrow is flat with the case with 1-4 T lined up with Mark.

Good, but are plug wires on right? Left coil fires 1 and 4, etc. easy to,mix up, so double check.

[tom203]

Ok so how many links are there supposed to be between the intake and exhaust cams.

In the picture of the cams from tom203 there is 19 links. It's it supposed to be 19 or 20?

My shaft 650 is 20 but I thought your 550 is 19 but what does manual say? The pic is of a modified 550 with 650 head.

[curtie94]

I just checked and yes the plug wires are on right.

The manual says 20 pins. But my 3 arrow is pointing straight up should it be slightly to the right? Would 1 pin stop it from running? The manual I am using shows from 77-82 but it doesn't seem to deal with electronic ignition at all like my bike.