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cb 550 3rd gear
gary123:
--- Quote from: Johnny4428 on October 05, 2023, 09:07:13 PM ---Just a thought Gary, the selector drum that positions these forks when the gears are selected could also be worn and make a difference. Also the levers that rotate the drum.
--- End quote ---
There's no "slop" in the drums channel and the peg fits well but I have a spare so Ill try a swop. I discounted the levers as all other gears select well.
gary123:
--- Quote from: K2-K6 on October 05, 2023, 09:45:01 PM ---Fork looks bent sideways, only supposed to touch on either side of the two pads out at end of fork.
Looks like a half moon witness mark at base of semi circle that's been rubbing where it shouldn't. That will probably account for the error you're seeing in travel.
--- End quote ---
I thought the fork might be bent, but if it is I cant discern it. Def worn at base which makes me think the pads are shot.
Bryanj:
I like to see pics of the gear dogs concerned, also does the gear dogs move more into the mating gear with selectors out.
2 does it look like its been apart before?
K2-K6:
--- Quote from: gary123 on October 05, 2023, 10:38:45 PM ---
--- Quote from: K2-K6 on October 05, 2023, 09:45:01 PM ---Fork looks bent sideways, only supposed to touch on either side of the two pads out at end of fork.
Looks like a half moon witness mark at base of semi circle that's been rubbing where it shouldn't. That will probably account for the error you're seeing in travel.
--- End quote ---
I thought the fork might be bent, but if it is I cant discern it. Def worn at base which makes me think the pads are shot.
--- End quote ---
I can't see complete detail from photo as slight blurr on fork of second one, but the pad looks more worn nearer the inner edge. If the other side (not in photos) of the pad has the tips more worn, giving a "diagonal" opposed wear pattern to the pads ? Then the alignment of them is contrary to the gear slot such that it siits touching both sides from that fault.
Slightly difficult to explain, but hope that makes sense.
Also usually shows with some heat blueing from running in contact continuously on some examples. That burr around the half moon cut shows quite a bit of running contact has taken place, when it shouldn't touch there at all.
gary123:
--- Quote from: Bryanj on October 06, 2023, 12:09:55 AM ---I like to see pics of the gear dogs concerned, also does the gear dogs move more into the mating gear with selectors out.
2 does it look like its been apart before?
--- End quote ---
Yes, has def been apart before. I did it. I replaced countershaft 4th at that time cos a dog had sheared off. It looked all good then and ran great for about 200 miles.
Yes the dogs move into a better mating position with the selectors out.
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