Carb/revving issues

[Nessism]

Thanks Ed, I may try that next (winding out 3-ish turns) but probably not until I replace plugs (cheap insurance) and get the air filter in place....

And I would have changed those o-rings were I able to get the airbox out of the frame, allowing access to the screws (not bolts, mind you) holding the intake boots on. Maybe I'll regret it but for now, seeing as how every other piece of rubber on the bike is soft and pliable, I'll take my chances.

Lord knows I don't want to pull those carbs again[-o<....

If you grab the outer screw sideways with vice grips you can usually crack it loose. After that, it's about a 50% chance that you can turn the entire boot to crack loose the inner screw. Worked great on my 550E but not on the 850. At any rate, good luck with those old o-rings. They leak on just about 90% of the old GS bikes that have the originals in place. Hope you are in the 10%.

[Smokinapankake]

So I took Nessism's thoughts to heart about his 550 not running with any less than 3-3.5 turns out on the air screws. I turned mine 3 out from bottom and it made a world of difference. Idles, responds to throttle input, actually runs really well. I haven't had a chance to get it on the road and do a plug chop but am looking forward to the results! What I don't understand is why it ran well, then didn't. Only thing I can come up with - and this may sound absurd to those who know much more than me - is that when I added some Seafoam to the tank it might have loosened up some goo inside that allowed it to run on an extremely rich setting (air screws too far in). Once those passageways were "cleared out" everything started working as it should, i.e., like crap at those settings?
Total shot in the dark here.

At any rate, its much better!

[twistedwankel]

.

My compression tester doesn't fit the plug holes. The tapered rubber end is worthless as I can't hold it in tight enough to get an accurate reading.

Heaven knows I sure don't want to pull those carbs again to check the diaphragms...

http://www.compperformancegroupstore...&Category_Code=

Here is the adapter you need in 12mm for your standard compression tester It will cost you as much to ship it as buy it but worth every penny and fedex quick. $5.95 + shipping