R&r exhaust valves and new exhaust cam

[Illinois750]

Can anyone help me out here?? I have a 1981 gs750 and 2 rockers on my exhaust side are snapped. I unfortunately just bought the bike like this. I have replacement exhaust cam and rockers from an 82. Only problem is they don't have the slot in the rocker like the 81 does. Is this still compatible?? And how do I remove and replace all this stuff?? Time the bike?? Valve adjustment?? Sorry I did a search an nothing of this nature came up. Thank you!!

[Illinois750]

Anyone?? I really wanna get my bike on the road..

[Nessism]

Suzuki service manual download, and tons of info like how to adjust the valves here...http://members.dslextreme.com/users/bikecliff/

As far as the camshafts goes, the one you have should interchange.

Lastly, that model GS engine is known for it's oiling system issues. I suggest you drop the oil pan and shim the pressure relief spring .060".

Good luck

[Illinois750]

Thanks for the reply unfortunately I can't find anything that says how to make sure the timing is in spec after I install new cam and rockers. Any ideas ??

[Illinois750]

Sorry for my ignorance also I'm a total noob. What are the oiling issues I unfortunately just replaced the oil pan. Is shimming necessary ??

[Nessism]

Sorry for my ignorance also I'm a total noob. What are the oiling issues I unfortunately just replaced the oil pan. Is shimming necessary ??

Your engine ate the cam and rockers. You decide on the oiling mod but I'd do it.

[platinum2]

read the manual, its easy enough to do , but read the manual, there are timing marks on the cams, sprockets,and crank real easy
check out parts pictures on cycle parts nation- make sure you loosen up valve adjusters all the way "11,12"-- b4 putting in cams this way you will not have any issues with tightening them down, the book shows vice grips,and isnt a perfect way of doing it, aftermarket gaskets are fine as long as there good set, vesrah, or iso, and you should get new valve seals in it
i would use a new oil filter as well, quick deglaze on the cylinders,use a torq wrench, get one from harbor freight if you have to this is a must! do not over tighten the valve holders, tighten the head as per manual!, i would suggest locktite on the valve adjusters when you have them tight it will keep them from vibrating loose, engines fly apart because of that
kids build these , im sure you can just read, and read it again,good luck, and put a video on when its done!

[Illinois750]

Thanks for the reply I ended up figuring it out and I'm going to adjust the valves now timing was totally off I had 12 pins or something like that between the marks. Once again thank you!! After I adjust valves I'll post a vid

[BassCliff]

Greetings and Salutations!!

Hi Mr. Illinois750,

Let me dump a TON of information on you and share some GS lovin'.

I just stopped by to welcome you to the forum in my own, special way.

If there's anything you'd like to know about the Suzuki GS model bikes, and most others actually, you've come to the right place. There's a lot of knowledge and experience here in the community. Come on in and let me say "HOoooowwwDY!"....

Here is your very own magical, mystical, mythical, mind-expanding "mega-welcome". Please take notice of the "Top 10 Common Issues", "Top 15 Tips For GS Happiness", the Carb Cleanup Series, and the Stator Papers. All of these tasks must be addressed in order to have a safe, reliable machine. This is what NOT to do: Top 10 Newbie Mistakes. Now let me roll out the welcome mat for you...



Please click here for your mega-welcome, chock full of tips, suggestions, links to vendors, and other information. Then feel free to visit my little BikeCliff website where I've been collecting the wisdom of this generous community. Don't forget, we like pictures! Not you, your bike!

Thanks for joining us. Keep us informed.

Thank you for your indulgence,

BassCliff

[Illinois750]

Dropped the pan, what do I use to shine the relief valve? Is there a write up anywhere?