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What did I do wrong

Hi guys,
Before I received the newer posts I removed everything and put the cam caps back on the cylinder hdad. I used the brake cylinder home method suggested and now all rotates. I don't know how much torque there should be on the crank. My manual says nothing but to check and make sure all moved freely. It does move freel, even checked it by turning it over with the starter, I also checked the torque and it takes 15 foot pounds to rotate the engine. Is that acceptable should it move more freely?
 
Bob Shaw said:
Hi guys,
Before I received the newer posts I removed everything and put the cam caps back on the cylinder hdad. I used the brake cylinder home method suggested and now all rotates. I don't know how much torque there should be on the crank. My manual says nothing but to check and make sure all moved freely. It does move freel, even checked it by turning it over with the starter, I also checked the torque and it takes 15 foot pounds to rotate the engine. Is that acceptable should it move more freely?
Click to expand...
The only way you can be sufficiently sure, is to mic it up.
Get a cheap set of bore gauges and see what the new internal size of the cam caps are when they're bolted down. Also mic the cam journals. Consult the Book of Lies and see what the clearances should be.
As far as I recall, I think the Haynes manual has camshaft journal clearances listed, but I might be wrong on that specific.

The magic happens when you stop at just the right amount - too tight, obviously disaster looms, but too slack and they'll rattle around and self-destruct eventually, just like a worn-out set. Be sure - as Nessism says, "To Measure is To Know".
 
Last edited:
Bob Shaw said:
I am using the original cams from the old head as well as the caps. I have not had the head milled. I had the bike running and then I lost a cylinder so I took everything apart again and started over. I did not remove the head. That will be my next step. Thanks for your input... PS: If the cam caps are not in line with the cams how do I rectify that??
Click to expand...

Buy another head, with the caps. Cheaper than the required machine work.
 
I have looked into another head. I found one that's complete. However, the valve cover has 16 holes whereas mine, on a 1982 gs850g, has 19 holes. I have checked part numbers for the cylinder head gasket, 11141-49410, and all are the same for 1979-83. I also find that 1979 was the only year for the 16 hole valve cover. Does it make any difference if the valve cover and cylinder head have 16 instead of 19 holes as long as the cylinder head gasket are the same. The seller states this cylinder head fits1982 gs850g??? I hope this makes sense. Thanks in advance for any help.
 
The '79 cylinder head would necessitate the fitting of the '79 slide-throttle carbs too (plus carb boots). It's one of the changes they made from the first year of the 850 to the subsequent years. Most of the changes are minor, but that one is a bit awkward and involves extra expense.
What the seller says is true, but he's being a touch disingenuous in not mentioning the extra work and expense needed.
 
Thank you. I have emailed the seller and have yet received an answer to my questions. You may very well have answered them. Again, many thanks.
 
Grimly,
The last time I contacted you, you spoke of a 79 cylinder head. Would that include an 82 gs850gl cylinder head as well concerning the carbs. I'm searching eBay and all I find are models with 16 bolt valve covers. As I stated before, I have a cylinder head with19 bolts.
Thanks for your assistance in advance.
 
The 850 heads came in three basic "flavors":
1. 1979 had 16 cover bolts and smaller inlet ports for the VM carbs
2. 1980, 1981 and some of the early 1982 had 16 cover bolts and larger ports for the BS32 carbs.
3. Mid-year 1982 and on had 19 cover bolts and kept the larger ports for the BS32 carbs.

1982 was unique with the silver head, 1983 and newer were all painted black. Yes, I said "and newer". :-k
We did not get any past 1983 in the US, but others around the world got them through 1988.

.
 
So, in answer to my question, can I use a 1982 cylinder head with 16 bolts and a matching 16 bolt cover from a GL on my G. When I read the I info from the sellers, the head is supposed to fit on the jug. I'm concerned with the switching to a 16 bolt valve cover. Thanks.
 
Last edited:
Only the EARLY '82 heads had 16 bolts. Not sure how far into the production they switched over, but yeah, if the head has 16 bolts for the cover, just install a cover that has 16 holes, too.

.
 
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