• Required reading for all forum users!!!

    Welcome!
    Register to access the full functionality of the GSResources forum. Until you register and activate your account you will not have full forum access, nor will you be able to post or reply to messages.

    A note to new registrants...
    All new forum registrations must be activated via email before you have full access to the forum.

    A Special Note about Email accounts!
    DO NOT SIGN UP USING hotmail, outlook, gmx, sbcglobal, att, bellsouth or email.com. They delete our forum signup emails.

    A note to old forum members...
    I receive numerous requests from people who can no longer log in because their accounts were deleted. As mentioned in the forum FAQ, user accounts are deleted if you haven't logged in for the past 6 months. If you can't log in, then create a new forum account. If you don't get an error message, then check your email account for an activation message. If you get a message stating that the email address is already in use, then your account still exists so follow the instructions in the forum FAQ for resetting your password.

    Have you forgotten your password or have a new email address? Then read the forum FAQ for details on how to reset it.

    Any email requests for "can't log in anymore" problems or "lost my password" problems will be deleted. Read the forum FAQ and follow the instructions there - that's what we have one for...

  • Returning Visitors

    If you are a returning visitor who never received your confirmation email, then odds are your email provider is blockinig emails from our server. The only thing that can be done to get around this is you will have to try creating another forum account using an email address from another domain.

    If you are a returning visitor to the forum and can't log in using your old forum name and password but used to be able to then chances are your account is deleted. Purges of the databases are done regularly. You will have to create a new forum account and you should be all set.

1981 GS850G camshaft questions.

  • Thread starter Thread starter Colt45
  • Start date Start date
C

Colt45

Guest
Alright everyone I'm new to the forum and I've been searching for 1-2 hours on camshafts that are usable on my 81 850 and I haven't found much info. My big question is I've seen performance cams for the 750's but nothing for my 850. Are their cam available for my bike? Can you use 750 cams on a 850?

Thanks in advance.
 
Would 1000 cams make more power? Or should I just go With a set of performance cams?
 
The OEM cams are similar to each other. The 750 cams have a little more duration and the 850 cams are timed for torque. You can get the specs from the factory service manuals if you want to look them up. Find Basscliff's website and download some manuals.
 
Colt45 said:
Would 1000 cams make more power? Or should I just go With a set of performance cams?
Click to expand...
For what a set of aftermarket cams would cost you will get WAY more bang for the buck by swapping in a GS1100G motor. No replacement for displacement....
 
The larger 1100 carbs would be needed and (I think) the driveshaft. Not sure if the airbox boots will fit to the 1100 carbs either. And the exhaust.

There have been guys that put a 1000/1100 engine in their 850 so it's definitely doable, but there will be a little more involved than simply bolting in a different engine.
 
My 1000g air box has "850 1000 1100" stamped on it
Even a 1000 g would be a great option. As for cams 750 cams will be a pretty good low buck swap not much hp to gain but a little more smile per throttle for sure
 
Nessism said:
The larger 1100 carbs would be needed and (I think) the driveshaft. Not sure if the airbox boots will fit to the 1100 carbs either. And the exhaust.

There have been guys that put a 1000/1100 engine in their 850 so it's definitely doable, but there will be a little more involved than simply bolting in a different engine.
Click to expand...
Nessism hit most of the high points there.
The '80/'81 850G and 1000G used the same frame, so there is no problem with fit.
The '82/'83 850G and 1100G used the same frame, but it was different than the earlier frame.
The bolt holes in the collars on the exhaust flanges have different spacing between the 850 and the 1000/1100, so you will need the exhaust, as well.
I think most of the motor mounts will work, but there might be ONE that needs to go with the engine, I can't remember which one.
The driveshaft needs to follow the engine. The bolt spacing on the u-joint is a bit different. It is also different from the '80/'81 and '82/'83 850s. The newer 850 shaft might fit the 1000 shaft, but I'm not sure.
The airbox is the same, but you will need the proper boots to go to the carbs, as the 850 uses smaller carbs.
Some time during the '82 model year, the ignition system was changed. The centrifugal advance mechanism was replaced with electronic advance in the ignitor, so you might need to change the ignitor, too.

Or, you can just save a lot of time and money. Just put the money in the gas tank, one fill at a time, and go enjoy your 850 as-is. :encouragement:

.
 
I'm thinking I'm just gonna jump up on camshafts. I like my 850 just want a little power. I already have a aftermarket exhaust and I made a custom air box with going threw and rejecting the carbs. I don't want to give all that up. Plus the motor has been pulled a couple years back and re gasketed.
 
Steve said:
Nessism hit most of the high points there.
The '80/'81 850G and 1000G used the same frame, so there is no problem with fit.
The '82/'83 850G and 1100G used the same frame, but it was different than the earlier frame.
The bolt holes in the collars on the exhaust flanges have different spacing between the 850 and the 1000/1100, so you will need the exhaust, as well.
I think most of the motor mounts will work, but there might be ONE that needs to go with the engine, I can't remember which one.
The driveshaft needs to follow the engine. The bolt spacing on the u-joint is a bit different. It is also different from the '80/'81 and '82/'83 850s. The newer 850 shaft might fit the 1000 shaft, but I'm not sure.
The airbox is the same, but you will need the proper boots to go to the carbs, as the 850 uses smaller carbs.
Some time during the '82 model year, the ignition system was changed. The centrifugal advance mechanism was replaced with electronic advance in the ignitor, so you might need to change the ignitor, too.

Or, you can just save a lot of time and money. Just put the money in the gas tank, one fill at a time, and go enjoy your 850 as-is. :encouragement:

.
Click to expand...

The 82+ GS850 used the same driveshaft as the 1100G. 81 will need a new driveshaft to match an 1100G engine flange.
 
Why would I reject the carbs? For the custom made air box and the custom exhaust. I don't like the factory air box or the factory exhaust that comes on the Suzuki gs.
 
You must log in or register to reply here.
Back
Top