Replaced main jets with 115s... STILL LEAN

[Anonymous]

i feel your pain

i have a 1980 gs 850 L, also straight piped with pod filters. bike starts and runs well but when i ride it the damn thing is obviously not getting enough fuel, as it hits wall aroudn 4,ooo RPM's also spits and backfires allot. I'm thinking of trying a dynojet kit and seeing what happens there. Stage 3 maybe? with pods and straight pipes i think this might be the route. anybody agree?

[pasteurized]

I really hope I can find an answer in the form of jets that will work. I am searching to find a set of stock carbs so I at least know I have what came as original equipment on the bike. After that I know I will need to mess with jets all over again. loghomeartist if you find anything will you please share it with the group or send me a message, I just want to get this thing running right.

[pasteurized]

I really hope I can find an answer in the form of jets that will work. I am searching to find a set of stock carbs so I at least know I have what came as original equipment on the bike. After that I know I will need to mess with jets all over again. loghomeartist if you find anything will you please share it with the group or send me a message, I just want to get this thing running right.

[duaneage]

I had a CB 550 years ago with ignition points. After setting the gap on new points according to the manual I manually timed the bike without a timing light, and here is how I did it.

I used a circuit tester, basically a 12 volt lightbulb with two wires on it, connected to the + wire of the coil and ground. I brought the #1 piston up on the compression stroke and positioned it right where the engine should fire, there was a little timing mark that lined up.

I then carefully moved the point plate until the light bulb just came on. This is where the engine would fire. Tightened the point plate, and checked it again to be sure. THis also timed the rest of the engine so I only had to do it for #1

BTW,, this is how every engine on earth was timed before someone invented the strobe light so if our grandfathers could do it this way so can we.

[earlfor]

Duane, for a GS your proceedure only works to time the 1,4 cylinders. timing of the 2,3 cylinders is accomplished by moving the half breaker plate independently of the full breaker plate and setting the 2,3 pointset to break at |F2 which is 180 deg from the |F1 that you used to set up the timing for the 1,2 side.


Earl

I had a CB 550 years ago with ignition points. After setting the gap on new points according to the manual I manually timed the bike without a timing light, and here is how I did it.

I used a circuit tester, basically a 12 volt lightbulb with two wires on it, connected to the + wire of the coil and ground. I brought the #1 piston up on the compression stroke and positioned it right where the engine should fire, there was a little timing mark that lined up.

I then carefully moved the point plate until the light bulb just came on. This is where the engine would fire. Tightened the point plate, and checked it again to be sure. THis also timed the rest of the engine so I only had to do it for #1

BTW,, this is how every engine on earth was timed before someone invented the strobe light so if our grandfathers could do it this way so can we.

[duaneage]

My current mount is blessed with transistors doing the work, didn't know Suzuki had two plates. Maybe honda had a better idea? Well that method will still work with the 2,3 pipes.

I timed a Cub cadet Tractor last fall this wey, my friend was shocked it worked. Easier than driving home to get my timing light

[jonr]

Pastuerized and Earl!

I have the SAME carbs on my 78 GS750. I compared your picture with my carbs and my "towers" have nothing on the bottom either. You may indeed have factory carbs!



Want to know the kicker? Right now, I have 100 mains and it's running rich!

-Jon

[SqDancerLynn1]

IF you turn them over and look at the hole at the top that is where the fuel screw goes!!!!!!!!!!!!!
[img]http://groups.msn.com/_Secure/0QwAPA9wTHJriVBevY7YOgn9FfED57yLaQx5iJ0aas3T8GE2X9 xvQdtOFa2twBtFA4KiUl37QZLuzrjXQIrj*2nbon0BAGv565Hm vDMfqrGc/VMcarb.JPG[/img]

[jonr]

Lynn,

You're right. Mine have deeply recessed screws at the top.

-Jon