Need jetting help please for GS1000 1979

[hampshirehog]

Ok, it appears that Suzuki stuffed up their drilling and tapping of your shaft if that happened. If drilled accurately, you should be able to assemble the slides 180 deg apart without affecting the slide syncro.

That's my guess to - but if they did it once.......?

[49er]

That's my guess to - but if they did it once.......?

Reminds me of my brother-in-laws 350 bullet single. His model, 2003 from memory, was made in India. It wouldn't idle properly, so we checked it out. The machining quality was pathetic. The rocker bearings for camshaft had been drilled on a bench press, with deep spiral grooves and ample clearance. The push rods were eccentric and spun wildly when the engine was running. We didn't have a "snowballs show in hell" of setting the tappet clearances accurately.

You get what you pay for, usually!

[nitrogs]

Hi Keith, 49er , hampshirehog

It looks like I may have made a fundamental mistake, I used an auxillary fuel tank to which I connected the fuel pipe and I forgot about the vacuum (suction) pipe which was left open. I have blanked the vacuum pipe and tried the synch gauges again and the levels are much more similar, I have adjusted the slightly higher readings to the lower and all four cylinders match up at 3000rpm now. I have run out of time for the moment as we are due to fly to Spain in 4 hours for 10 days. I will be in touch on my arrival back and it is straight into road testing the circuits, hopefully everything will be fine this time. Look forward to speaking shortly until then I would like to thank you for your continual help.

Dave

[KEITH KRAUSE]

Dave, you sure threw me a curve. Here I sat trying to figure out what could be going wrong. Based on your posts and the fact you had synched several times before, I never thought you could forget to plug the vacuum port. Actually, this has happened many times over the years so maybe I should have thought of it.
It is however very easy to over-adjust and before you know it the bike is idling too high and the throttle pulley is no longer making contact. No vacuum leak needed to make it happen. That's why I emphasize a good bench synch and then adjusting the higher level(s) down to the lower ones.
I think the bike should run fine. Maybe a little fine tuning of the pilot circuit at the most. Jet needle position 4 was too rich. 3 was lean. Nowhere to go but 3 1/2.
Have a good trip. Looks like you'll be back about August 6th? If so, I'll try to see how things are but I'll be going up to Yellowstone on August 9th and I'll be gone until August 20th. So I may not be able to help if you need it. I'm sure others here will help.
I want to hear how happy you are with the bike so please let us know.