Hey howdy hey!
Hey howdy hey!
Mr. raphy2,
Let it be known that on this day you are cordially and formally welcomed to the GSR Forum as a Junior Member in good standing with all the rights and privileges thereof. Further let it be known that good standing can be improved with pictures! :-D
Just to get you familiar with the procedure, you can see the site's carb rebuild series by
clicking here. Mr. bwringer shows us a bit about replacing carb boots and o-rings
here. I you're not doing them yourself then you probably don't need to see Mr. robertbarr and his
O-ring selection. For other 850-specific maintenance tasks you can check out my little
BikeCliff website.
I'll admit, carbs scare me a bit and I have yet to rebuild a set. I bought an extra set to practice on. But there are others here who can do it blindfolded. I've been quoted $250-$300 for a carb rebuild by a local guy who specializes in these classic bikes. Of course, one mechanic's idea of carb rebuild may be different from another's. If someone else is doing it, be sure they have a good reputation. I've read horror stories in this forum about bad carb rebuilds.
I'd like to quote the wisdom of one of my favorite GSR members, Mr. bwringer:
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>From Mr. bwringer:
Every GS850 has (or had) a set of well-known issues that MUST be addressed before you have a solid baseline for further troubleshooting.
It's a vintage bike, and it's quite common (as in, every single GS850 I have had contact with) that there are multiple problems that have crept up and slowly gotten worse over the years.
It's not like a newer vehicle, where there's generally one problem at a time.
These common issues are:
Intake O-rings (install NEW OEM or Viton only - common nitrile o-rings will quickly deteriorate from heat)
Intake Boots (install NEW -- these cannot be repaired)
Valve clearances (more important than most people think)
Carb/airbox boots
Airbox sealing
Air filter sealing
Petcock (install a NEW one)
On '79 models, install new points or Dyna electronic ignition (or at least verify that the old points are working correctly)
On all models, it's fairly common to have problems with the spark plug caps. These are $3 or $4 each, and often worth replacing if you're keeping the stock coils/wires.
Stock exhaust with NO leaks or holes -- good seals at the head and at the junctions underneath.
None of these things can be neglected, worked around, or half-assed in any way. Once they are squared away, you most likely have a bike that runs like a dream -- these issues account for a very large portion of running problems.
If not, then you can pursue more exotic problems. For example, I have found incorrect float heights a couple of times due to a common misunderstanding in how these are best measured. But you can't uncover other problems without making sure the intake/exhaust paths are leak-free, the valves are adjusted correctly, and you're getting good spark.
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And then, there's always Sea Foam. Sometimes it can help, but a rebuild is always the best thing to do.
Thanks for joining us. Please keep us informed and if you can't find the information you need by using the
search feature, feel free to ask.
Thank you for your indulgence,
BassCliff,
(the unofficial FSR greeter)