GS 850 idles fine but no go under load?

[Anonymous]

Ive got a good idle and revs in full range but when I put it in gear and release it boggs down and doesent want to rev. What could this be? Doesent seem to be air leaks. Could be condesers? Dirty carbs? Any help would be great

[Anonymous]

I don't know anything about condensors so I can't help you there. I would try cleaning the carbs really well, it's well worth the time. How are your carb boots and o-rings?

Something similar happened to me once... My problem was an incorrectly connected rear brake. Everytime I sat on the bike the brake would go on preventing me from going anywhere. It took me all afternoon to figure that one out. Moral of the story.. when you have a problem start simple, don't make it more complicated than it is. I was ready to tear the clutch apart and all I had to do was adjust the brake linkage.

Good Luck man

[flyingace]

Some simpler things to check before you dig into carbs:
1. Does the bike roll OK in neutral?
2. Do you have adequate compression?
3. Do you know the bike is firing on all cylinders?
4. Do you live on a 20 degree incline?

Ace.

[robinjo]

Is the stock airbox in place and sealing well? Is there a good filter element in there? Is the lid on? Did you do any work on the bike before this started?

[mark]

Does it run better with the choke on?

[KEITH KRAUSE]

A bike that rev's OK in neutral but not under load is usually showing fuel starvation. Check petcock flow first. Also tank condition (rust?). Check vacuum line and fuel line/any filter. If all good, carb cleanup/rebuild time.

[nabrams]

I've had your problem on three different bikes for three different reasons.
Bike 1: Like Robinjo said - make sure all your air-box/filter/boots are proper and sealing well. Also check for exhaust leaks. A "slightly" lean condition (even though there's no backfiring) really shows itself when the bike is under load.
Bike 2: Like Kieth said: Partial fuel starvation due to partially clogged jets and/or partially restricted fuel flow from the petcock leading to a "slightly" lean condition - Once again, the bike may be fine in nuetral, but bog under load.
Bike 3: This one was really puzzling till I finally figured it out. One of my coils was "slowly" degenerating - but I didn't know that at first. When I did the visual verification of spark it was fine. I thought coils are either good or not. I was wrong. There is a gray area where they'll intermittently fail at high RPM. The rate of failure can be such that you don't necessarilly hear any backfiring. I played with all kinds of fuel and air related things for a couple of weeks till one day the coil finally died and the bike was clearly firing on only half its cylinders. That's when I realized it was the coil all along. The same affect can be generated by any "slowly" failing part of the ignition system: like igniter, or plug wires, or signal generator.