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Valves n Shims...
- Thread starter mvalenti
- Start date
Steve
GS Whisperer
Good thinking. :clap: :clap:
By the time the compression goes down, it's too late, the damage is already done. May as well adjust the valves and prevent the damage.
Not all that bad, did you have the throttle held open?
.
Guest
Guest
It's this guy around here with no name. I think he's some kind of GS wizard or something.
Thanks Eric. Somehow I managed to keep oil away. The bucket tool never slipped.
Ghost, I found the valve check/adjust to be simple and even somewhat enjoyable. :-$ The worst part was cleaning the friggin' gasket surfaces.
I agree Eric, I rather enjoy that as well. I've helped several folks do their valves over the years. These days I don't ride enough to need to check mine often, so helping someone else helps me stay up on the process. Ray
Guest
Guest
I didn't do it when it was running, I pulled all the wires and bumped the starter till the guage maxes out. I predict I did it wrong..
If you don't keep the throttle open when checking compression, you will likely see lower numbers . You may be in good condition ring and piston wise with the numbers you saw, with a closed throttle. Ray
Steve
GS Whisperer
If the throttle is closed, the cylinders can't draw in enough air to compress, giving false low readings.
Just leave the wires off, leave ALL the plugs out, hold the throttle wide open, press the starter button and watch the gauge.
.
I checked my compression the other day. I started at low rpm, low speed in 2nd gear. Then twist the throttle. I determined that this aspect was good because the torque pulled the bike nicely, then at about 5k rpm the engine went bonkers and ripped toward redline. No weak feeling the whole way through the revs. I suppose the sweet, deceiving acceleration from good torque is more pronounced with the larger cc engines. Not fair.
Just kidding, the 550 is a blast.
No seriously, how is the torque pull out of the 850+ cc engines?
It's better than the smaller bikes, but wait until they hit 8,000 or so, that's what they were designed for.
mvalenti
Forum Mentor
These were taken warm and with throttle open. Also, my valve cover gasket came in. Question, what harm is there in measuring the shims, putting the valve cover back on and riding a bit till my shims come in?? Do I need to put gasket cement on the new gasket? If the shims are way off I'd wait to ride...
In my opinion:
1) Don't ride if your clearances are so tight that no feeler gauge fits and the shim bucket won't turn. That is, won't turn when cam is in proper position for clearance check.
2) If the above doesn't apply but there are tight clearances I still wouldn't ride since your wait is likely less than 2 weeks. On the other hand, what would 2 more weeks hurt?
What are your compression specs? Check them after your adjustment. Then ride it and see how the bike feels. If it doesn't feel tired and has good torque push don't worry yet.
