83 Suzuki GS750ES won't start after carb cleaning! Please help.

[Ranger]

Just out of curiosity .........when you cleaned the carbs out did you by chance open up the diaphram/needle portion of the carburators? You would access the diaphram of each carb by removing 4 screws found at the top of each carburator. Rubber diaphram and needle come out as a unit.
If you pulled these out and proceeded to disassemble the needle from the diaphram make sure you reassembled them with the tiny c-clip in the right groove on the needle!!

Heads up - some CV carbs from that era provide the option of several slots on the needle where the c-clip can be installed.............while some of these same CV carbs have only one slot. It had to do with emissions and the EPA.
The carbs off my 84 GS 750E came with the needles providing several slots (4 I think) on the needle......I'm also in Canada so the carb set up on Cda versus US models may differ.
Hope my ramble makes some sense.

If you're talking about to raise or lower the needle height then, no they dont.

 

[alke46]

But now the bike won't start. It doesn't even start to catch. The engine turns over but there is no combustion.

When I read this, my 1st thought was "did he inadvertantly hit the kill switch?" Always thinking of the kiss rule of thumb. You know the one,
Keep
It
Simple
Stupid
Good luck finding the cause to your troubles.

 

[jetta90]

Yes Ranger - that's what I'm talking about. Wasn't sure if the US models came with the adjustment option due to EPA regulations of the time.

 

[stephendotexe]

Hello again, everyone. I wanted to do a quick update. The bike is running and working SO MUCH BETTER! Before the carb clean I could barely idle at 2.5k rpms, and would get surging of about 300 rpms up and down. Now it runs nicely at its spec 1.3-1.5. The gas mileage has greatly improved, and I no longer get random and constant backfiring. Those jets were clogged.

Here's what went wrong. Apparently I just didn't put it back on snug enough. When I took it off the second time I replaced the fuel line but the line ended up leaking. It also started turning over really strangely because I someone burned out the solenoid somewhere in that process.

The mechanic took off the carbs, replaced and fixed the fuel line, checked out the carbs, did some random tune-up/tweaking, and replaced the solenoid for about $160. I consider it money well spent, and I feel pretty confident I can do it all myself in the future.

Thanks all who helped me out before. Now it's time to go cruising. :dancing: