1980 GS jetting

[Guest]

Doing some research for my neighbor who owns a couple GS motorcycles.

He picked up a good deal on a 1980 GS 1000.

Bike has a 4 into 1 exhaust, airbox removed K&N POD filters, bike is running very rich. We do have the stock airbox from the PO. I don't really want to put that back on the bike. I'd like to get the PODS to work.

I need to get into the carbs and find out what jetting is in there, if it has shims installed and what not. I can start the bike without the choke and it burns my eyes.

What I need is a good ball park figure for a good place to start for a carb set up on this bike. Because whatever the PO did is not working.

You should see this bike, showroom condition. YIKES!!!

I'm sure the carbs are stock they look like they are 30 or 32 mm.

[eil]

With pods and a pipe, the most common problem is running too lean. Too rich is quite unusual. You have to crack into the carbs to see what's in there. (Perhaps there are no main jets installed? That would be kinda funny.) And rebuild them while you're at it.

Do your neighbor a favor and point him to this website. In particular, read this post, which has pointers to everything you ever wanted to know about these bikes including links to factory service manuals: http://www.thegsresources.com/_forum...d.php?t=196338

If you want the bike to run right, you have to rebuild the carbs, adjust the valves, make sure there are no air leaks, the whole nine yards. All maintenance caught up on. Never believe previous owner's claims of this done and that done without the paperwork to prove it.

[gustovh]

Speaking just to the carbs, I run pods/4/1 on my 80 850, The main jet is a 225 and the pilot screws out 2 1/4 turns. That is with adjusted valves and cleaned carbs, and proper sync.

V

[hjfisk]

Speaking just to the carbs, I run pods/4/1 on my 80 850, The main jet is a 225 and the pilot screws out 2 1/4 turns. That is with adjusted valves and cleaned carbs, and proper sync.

V

225?? you mean 125 correct? 225 is huge , I don't even run that big on a heavily modded 1100

[gustovh]

Yes Yes, 125.

V

[sonicboom2]

What size are the stock primary jets or would you recommend for this set up.

[tom203]

Here's a chart that shows stock jetting

http://members.dslextreme.com/users/bikecliff/images/carbspec_float_height.html#A01

You need to open up carbs and see what's there.