Carb sync / valve adjustment / service manual **** 1982 gs850gl

[mikerophone]

Basscliffs pdf that I linked has good pictures and instructions, the manual is good too so do as Steve and Ed suggest (look at their post count, these guys are experts!) and don't follow the Clymer manual.

The 80 and 82 850 engines are the same - there are only minor ignition differences and the bolt hole pattern on the valve cover changed ~mid 82 so the gasket is different. The manual that I linked also has the specific model year, L and G differences listed near the end. It's all there...

[hannibal]

You said it drew more vacuum and I interpreted that as meaning the cylinder was running leaner. More vacuum means more air and therefore leaner?

[chanceafrica]

You said it drew more vacuum and I interpreted that as meaning the cylinder was running leaner. More vacuum means more air and therefore leaner?

drawing more vaccuum means its getting less fuel/air mixture making it run colder than the other cylinders. but doesnt matter now, valves first!

[chanceafrica]

drawing more vaccuum means its getting less fuel/air mixture making it run colder than the other cylinders. but doesnt matter now, valves first!

well i meant a higher reading in the gauge. the vaccuum has more resistance because the throttle slide is in a lower position. so thats less vaccuum but higher reading in the gauge. haha im getting confused

[chanceafrica]

if you roatate the cam lobe on ex1 (first cylinder on left) to the forward position, parralel to the case half and check the clearence for ex1 & ex2 , is that insinuating that both lobes are in the same position? both lobes are facing forward? that would mean that both cylinders open and close at the same time? my lobes do not lineup that way. no lobes line up in the same orientaion on the exhaust side at any point of rotation. and it doesnt really make sense to me that they would. obviously im mossing something. also i find it hard to believe this manual is telling me the wrong way to do something even though its a clymers. obviously i am considering other suggestions that why i am here. and thank you for your help.

[chanceafrica]

i called 3 reputable shops and one being a dealer, all suggested to take my reading with the lobe opposite of the shim bucket(perpendicular). when i tried to orientate my exhaust valve came lobe on cylinder 4 perpendicular (lobe away from bucket)to the case half i get a clearance of .06mm with the lobe parralel to the case half. i cannot get any clearance (smallest feeler i have is .02mm). when ex4 is parralel ex3 is perpendicular. what gives? im not trying to say one thing is right or one thing is wrong im just trying to be careful and do whats right

[hannibal]

The lobes on the cam for adjacent valves will not be parallel. They'll be off by 90 degrees but neither lobe will be acting on the shim/bucket. Will send a photo in a few.

[hannibal]

Cylinders 1 and 2: When the lobe of cyl 1 intake cam is pointing straight up, cyl 2's lobe will be point to the rear of the bike and you can check both clearances. Hard to imagine in this pic, but when the lobe of cyl 1 exhaust cam is pointing forward, cyl 2's lobe will be pointing straight up and you can check both clearances.
cams 2.jpg

[hannibal]

Cylinders 3 and 4: When the lobe of cyl 4 intake cam is pointing straight up, cyl 3's lobe will be point to the rear of the bike and you can check both clearances. When the lobe of cyl 4 exhaust cam is pointing forward, cyl 3's lobe will be pointing straight up and you can check both clearances.
cams 1.jpg

[jsandidge]

Listen to what these forum guys are telling you. It is exactly as stated in the Suzuki factory manual. The shop guys are telling you what is in the Clymer manual. It is wrong.

[chanceafrica]

so i remeasured. i tried first on exhaust side on the fourth(right) cylinder. with the lobe parralel to the mating surface(facing the front) i could not get a clearance reading. with the lobe up and down (perpendicular) with the mating surface the clearance is .03. i also have been trying a measurement at a 45degree angle so the lobe is exactly opposite of the bucket and shim and only on two did i get different readings. note: my feelers only read down to .02 thats why 2 of the reading say -.02

[chanceafrica]

i tried posting a picture but its not working on my phone

[chanceafrica]

image.jpg sorry its side ways. this was the last measurement i took according to what you said. next photo will be the measurement before this one with all lobes up (see note on pic)

[chanceafrica]

image.jpgwhats weird is even when the lobes up and down on both readings, i get different measurements. also sorry the orientation is backwards of the top end position on the two photos , that makes it confusing

[jsandidge]

[ATTACH=CONFIG]41728[/ATTACH]whats weird is even when the lobes up and down on both readings, i get different measurements. also sorry the orientation is backwards of the top end position on the two photos , that makes it confusing

That is exactly why it should be done the Suzuki factory way. The other way will give you different (false) readings.