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750 engine type question

  • Thread starter Thread starter scamp62
  • Start date Start date
S

scamp62

Guest
I just got a 79’ GS750 in parts, (for the great price of free !) as I'm going thought it I have a question for you in the know, did the 79’ have a TSCC or 16 valve engine ???
The CLYMER manual I have states that the 79’ should have an 8 valve engine.
If not a 79’ is there anyway to tell what year the engine is ???
And what type ???
[FONT=&quot]Any information would be appreciated.. [/FONT]
 
'79 is an eight valve engine. Kickstarter, round cam end caps, clutch mechanism on the left side countershaft cover. Better engines than the '80 - '82 version 750.
 
The first of the '80 models were made in '79, but they would be called '80s, not '79s.

Look at the ends of the cams, at the covers. If they are shiny and round, you have an 8-valve '79 engine.

If you have somewhat rectangular covers, you have an early '80 16-valve TSCC engine.

.
 
With the cylinder head off, it is incredibly obvious which engine that you have. 2 valve reliefs or 4 per piston? Also, if the cam cover is off, you would have rocker arms instead of cam over buckets.
 
Still doesn't know what the rest of the bike is, I think that was his original question.
 
Is the tail piece a duck bill or flat and tapered into the lens?
 
will try to get some pic's up tomorrow
the engine numbers are GS75X-1055 if that helps
 
scamp62 said:
So it is a 1980 bike ??
Click to expand...
Well, the frame, forks and gas tank shown in those pictures are '80/'81, we can only assume that the engine is, as well.
icon_shrug.gif


.
 
Is there any way to tell the exact year and type of engine I have ???, I do want to get a new exhaust system for it , and I don?t want to end up with a big set of paper weights !!!
P.S. Thank you for any information.

P.S.S. the data plate on the frame says its a 79' ???????
 
Steve said:
The first of the '80 models were made in '79, but they would be called '80s, not '79s.

Look at the ends of the cams, at the covers. If they are shiny and round, you have an 8-valve '79 engine.

If you have somewhat rectangular covers, you have an early '80 16-valve TSCC engine.

.
Click to expand...

scamp62 said:
will try to get some pic's up tomorrow
the engine numbers are GS75X-1055 if that helps
Click to expand...

scamp62 said:
Is there any way to tell the exact year and type of engine I have ???, I do want to get a new exhaust system for it , and I don’t want to end up with a big set of paper weights !!!
P.S. Thank you for any information.

P.S.S. the data plate on the frame says its a 79' ???????
Click to expand...
I believe your question was answered by Steve in post #3 highlighted here.I can't think of any vehicle manufacturer that doesn't start a model year's production run in the year before.Your early engine# would say it's an early run 80.
 
To tell the type of engine, it might, just might, be helpful to see a picture of, well, the engine?
 
I got this bike in parts so here are pics of the engine in parts !?!?
cant bitch, for i got the bike for FREE !! "just get it out of here !"
 
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