Chain Trouble GS1000

[freshaire67]

Hey all, I need some advice, brain power, and expertise ASAP
I have a 79 GS1000 that I bought and brought back to life this summer...now she is having a big problem.
I let my drive chain get too lose after a long road trip about 2 weeks ago and I just jumped the chain doing about 85mph...fun fun fun

Thing is except for smashing the guard and damaging the font cover, It doesn't LOOK like I did much damage....BUT after putting the chain back I have a major issue... she stalls at the drop of a hat and dies on even the slightest incline.

Starts up no problem with choke
but will either sit at 1k rpm and then die in a few seconds
or will rev right up to 4k-4.5k for no apparent reason and crack and snap in the pipe something fierce.

When she warms up she will idle ok for a little bit and then suddenly die like someone cut the gas... sometimes I can hold a light rev... sometimes it is like I never touched the throttle and hit the kill switch instead.

She shifts in idle smoothly through all the gears

She seems to shift ok while moving (at least in 1st and 2nd but if I hit any type of incline at all (or sometimes no incline or even down hill) she dies... again throttle play doesn't even sputter and slow the stall.

Carbs were cleaned and syncd in June (2k ago) and new points were installed then also. All rubber was replaced (except the carb boots which seem to be the holy grail to find)

If you have any thoughts or clues for me that would rock... She is my daily runner (60-100 miles a day) AND I am moving to TX from WA in about 2 weeks and really want to ride her down.... if I can't get this figured out I will have to fly and sell her.... and that would be a waste

[Clint]

Welcome to M-J. That is a tough problem.

I don't think the chain and engine trouble are related (unless you actually crashed when the chain jumped). I wonder if you didn't get into one of the safety switches - like the sidestand switch or a transmission sensor.

[Easy Rider]

Originally Posted by freshaire67

Hey all, I need some advice, brain power, and expertise ASAP

Check the oil ??
Thrown chains sometimes damage the case.

Like Clint said, what actually happened when the chain jumped the track??
Did it then also come apart and fly off ??

If the bike fell over, you may have stirred up some "stuff" in the tank that is now plugging the fuel flow. Your symptoms sound more like a vacume leak.

[freshaire67]

Originally Posted by Clint

Welcome to M-J. That is a tough problem.

I don't think the chain and engine trouble are related (unless you actually crashed when the chain jumped). I wonder if you didn't get into one of the safety switches - like the sidestand switch or a transmission sensor.

Thanks, I am starting to worry less about her and will buckle down to working it out this long weekend. You just said what I have been thinking, That is why I am really scratching my head... it just doesn't seem like the chain could cause it, but she was running perfect until this. I will have to recheck my manual but I am fairly sure there is no sidestand switch on her. I will need to see about a tranny sensor.

[freshaire67]

Originally Posted by Easy Rider

Check the oil ??
Thrown chains sometimes damage the case.

Like Clint said, what actually happened when the chain jumped the track??
Did it then also come apart and fly off ??

If the bike fell over, you may have stirred up some "stuff" in the tank that is now plugging the fuel flow. Your symptoms sound more like a vacume leak.

Bike didn't go down at all. Back wheel skided a split second never good at that speed ( I was surprised my pants were still clean) but not bad at all considering... then simple stall coast off to the berm and then about 1/8 of a mile to a nice wide spot.

Vacuum leak is now first check on my list tomorrow... pretty easy check and I have 2 cracked up carb boots (you can't find replacements for em) so that is a real good possibility... I may have to get creative with some high heat silicon
I think fuses and any lower wiring is next along with seeing if and where to find the tranny sensor if it has one (what the hell is a tranny sensor btw)

Is there any way it could have thrown my carb syncing out of wack?

[Easy Rider]

Originally Posted by freshaire67

Is there any way it could have thrown my carb syncing out of wack?

Do you know Mr. Murphy?

He says that anything can happen.......but I doubt it.

Locking the back wheel puts a lot of stress on "things". Could have opened one of those boot cracks. Also caused a BIG sloshing of fuel in the tank; could have displaced some "crud" similar to dropping the bike.

Good luck!