Carb sync and valve adjust-still not too happy

[ssanderson111]

In that case, I'll double check them. : )

[gert du prez]

had the same issue after valve adjustment and carb synch (did it with petcock on PRIME)

2 reasons caused this:

1) replacement vent hose was too wide (and sucked small amount of air apparently) --> replaced with smaller hose
2) petcock is not working properly: 'ON' didn't work before either (but I drove on RES constantly), now ordered replacement petcock as well to really start from scratch

what I learned from Mr. Steve: it is not because you suck on the vacuum line (attached on the petcock) and you feel you can move the diaphragm, that in practice the fuel will flow when everything is installed !

[DrImodium]

I had a similar problem with my 80 GS1000 with the vacuum operated petcock. Pull your #2 plug, what does it look like? Me thinks its the petcock.

[ssanderson111]

UPDATE: I just put another gallon of gas in the tank, turned the petcock to "pri", and started the bike. It started right up with choke half out. It idled fine, but I noticed a small amount of white smoke coming from both exhaust pipes. After the engine was warm I putted around the parking lot a few times (3-4 .25 mile laps). It seemed to be running MUCH better. First gear seemed a little sluggish below 4k rpms. Then I took it out for a quick 5-mile ride. It accelerated nicely and didn't seem to exhibit any of the symptoms previously discussed. Although, it did feel a little funny in 2nd and 3rd gear above 7k rpm. The engine is still louder than it was prior to the valve adjustments as well.

My new petcock should be here in 2 days. The airbox boots should be here by Saturday. I'm guessing the carbs will need to be synced with the new boots on?

[tas850g]

It was very frustrating for me trying to figure out what the heck was going on when my bike acted like this after the carb cleaning. Long story short, I put the petcock on pri and it ran great. I couldnt have been more excited!

Now on to the next task.

[OldVet66]

Funny you should mention that it seemed louder. I have noticed over a period of time ( because it took a long period of time to get mine sorted out) that the better they run, the quieter they get.

[BassCliff]

Hi Steve,

It will be a little noisier because some of the valve clearences are on the loose end of spec, one or two @ .10mm. Does #2 still make the tapping sound? But your news is encouraging. We can sync the carbs again after the new boots. Did you get a new petcock too?

Thank you for your indulgence,

BassCliff

[ssanderson111]

Thanks for your help, guys!

Cliff- The new petcock arrived yesterday! The boots are taking longer than expected to get here...probably had to be ordered from Japan. I'm waiting for the boots to get here so I can put them on at the same time as the petcock.

The good news is I've ridden the bike 15-20 miles over the last couple days and it's still running consistently!

[Suzuki_Don]

Thanks for your help, guys!

Cliff- The new petcock arrived yesterday! The boots are taking longer than expected to get here...probably had to be ordered from Japan. I'm waiting for the boots to get here so I can put them on at the same time as the petcock.

The good news is I've ridden the bike 15-20 miles over the last couple days and it's still running consistently!

Steve be careful you keep plenty of fuel in the tank as running on PRIme you don't have any reserve and you don't want to get stuck miles from home with an empty tank.

Good news about the bike running well. I'd check #2 exhaust shim again and try to get it within spec. for a quieter motor.

[ssanderson111]

Steve be careful you keep plenty of fuel in the tank as running on PRIme you don't have any reserve and you don't want to get stuck miles from home with an empty tank.

Good news about the bike running well. I'd check #2 exhaust shim again and try to get it within spec. for a quieter motor.

I was thinking the same thing! I put another gallon of gas in the tank today...

[Nessism]

I was thinking the same thing! I put another gallon of gas in the tank today...

I have lots of spare valve buckets if you want one. Most likely the engine got hot and galled that bucket so now it's hanging up in the valve pocket. Pretty easy fix assuming this is the issue. Send me a PM if you want to take a ride and pick up a couple of spares.