Author Topic: 1975 CB750 K5 SPYDER (Read 61369 times)

Stev-o · « **Reply #200 on:** January 01, 2014, 12:44:38 pm »

Ordered it, thx. It ships from PS very close to my house...

goldarrow · « **Reply #201 on:** January 01, 2014, 02:19:09 pm »

Spent half a day stripping down the bike, most of time really was cleaning up oil in the floor. Must have spilled at least a qt. of oil while draining.

goldarrow · « **Reply #202 on:** January 01, 2014, 03:34:33 pm »

I swear first time doing it was much easier. But engine is out finally. Now what?

goldarrow · « **Reply #203 on:** January 01, 2014, 06:05:14 pm »

Got the cases split

Looking for the obvious, but where?

goldarrow · « **Reply #204 on:** January 01, 2014, 07:11:06 pm »

Is this what causes my 2nd jerks a lot?

Stev-o · « **Reply #205 on:** January 01, 2014, 07:32:15 pm »

That certainly is an issue. Doesnt seemed to be spaced properly?

MoMo · « **Reply #206 on:** January 02, 2014, 06:32:16 am »

Quote from: goldarrow on January 01, 2014, 07:11:06 pm

Is this what causes my 2nd jerks a lot?

That and the gears it slides into definitely. Problem usually caused by rider abuse-as has been mentioned earlier the bottom end is practically bullet proof unless abused...Larry

iron_worker · « **Reply #207 on:** January 02, 2014, 06:45:49 am »

I would not expect to see any where there at all? Usually all the wear is on the end of the "forks". Makes me wonder if your shift forks were installed backwards or some such thing...

IW

KrautKoffin · « **Reply #208 on:** January 02, 2014, 11:33:40 am »

Awesome build! What did you end up doing with those wheels and body kit?

goldarrow · « **Reply #209 on:** January 02, 2014, 06:01:51 pm »

Found left shift fork in parts bin, wonderful condition, got it cleaned up and oiled. Looked into the gear drum more closely, there is a good amount of wear on the slot where that damaged fork pin sits. Will have to dig in my parts bin again. If not found, I might have to hit Stevo up for the drum

goldarrow · « **Reply #210 on:** January 02, 2014, 06:02:39 pm »

Quote from: KrautKoffin on January 02, 2014, 11:33:40 am

Awesome build! What did you end up doing with those wheels and body kit?

They have been sitting on the shelves. No idea what I'm gonna do with them.

goldarrow · « **Reply #211 on:** January 02, 2014, 06:04:08 pm »

Quote from: Stev-o on January 01, 2014, 07:32:15 pm

That certainly is an issue. Doesnt seemed to be spaced properly?

Worn shift drum, caused the shift fork slipping??? At least that what I see in it at the moment

Stev-o · « **Reply #212 on:** January 02, 2014, 06:05:44 pm »

Quote from: goldarrow on January 02, 2014, 06:04:08 pm

Quote from: Stev-o on January 01, 2014, 07:32:15 pm
That certainly is an issue. Doesnt seemed to be spaced properly?

Worn shift drum, caused the shift fork slipping??? At least that what I see in it at the moment

Pic? I should have one.....

goldarrow · « **Reply #213 on:** January 03, 2014, 04:40:10 pm »

Not sure how we'll you could see from the pic, but there is a worn area with my screwdriver pointing at it

Now my question is, how do you remove the drum, before I damage the case

goldarrow · « **Reply #214 on:** January 03, 2014, 05:16:27 pm »

Got the shift drum out, that was too easy, just had to remove the neutral switch at the bottom

And here's a better shot of the worn drum

Found a shift drum in my parts bin, just have to clean it up and oil it

MoMo · « **Reply #215 on:** January 03, 2014, 06:13:41 pm »

What is the condition of the gears that that shift fork actuates? I can visualize the dogs being rounded off...Larry

goldarrow · « **Reply #216 on:** January 03, 2014, 08:10:55 pm »

Quote from: MoMo on January 03, 2014, 06:13:41 pm

What is the condition of the gears that that shift fork actuates? I can visualize the dogs being rounded off...Larry

Here's the gear the bad L fork sits on

dogs on different gear

2 shiny wear marks on another gear?

Thoughts, recommendations, suggestions, anything helps.

Stev-o · « **Reply #217 on:** January 03, 2014, 09:03:19 pm »

Sorry, Gold, I just am having a hard time seeing the issue in the pics [and yes, my eyes are good!]
Can you put the trans back in with a good shift drum and fork and try to shift it and see how it looks?

MoMo · « **Reply #218 on:** January 03, 2014, 09:39:59 pm »

Gotta agree with Steve, though the inner part of the lower dog in the first photo does appear to be a tad rounded but that could be either a refection or something close to normal wear and tear. I am surprised there isn't damage...Larry

goldarrow · « **Reply #219 on:** January 04, 2014, 05:45:41 pm »

Case half is back on now, just needed few small hit with rubber mallet. All is too easy, too good to be true? Used small amount of hondabond around the mating surface, then tight up the bolts.

My concerns are two things as I couldn't see how the center fork went on to the gear slot, and chain roller. Any pointer?

MoMo · « **Reply #220 on:** January 04, 2014, 05:53:46 pm »

You should be able to shift through the gears to ascertain it is together correctly, and it is hard to put the cases together wrong...larry

goldarrow · « **Reply #221 on:** January 08, 2014, 11:25:02 am »

Quote from: MoMo on January 04, 2014, 05:53:46 pm

You should be able to shift through the gears to ascertain it is together correctly, and it is hard to put the cases together wrong...larry

That's a relief.

Got the engine all buttoned up, cleaned, and degreased, will need some touch up paint before going back in the frame

Stev-o · « **Reply #222 on:** January 08, 2014, 03:28:30 pm »

Quote from: goldarrow on January 08, 2014, 11:25:02 am

Quote from: MoMo on January 04, 2014, 05:53:46 pm
You should be able to shift through the gears to ascertain it is together correctly, and it is hard to put the cases together wrong...larry

That's a relief.

Got the engine all buttoned up, cleaned, and degreased, will need some touch up paint before going back in the frame

Good news. And the test shifting seems fine?

goldarrow · « **Reply #223 on:** January 08, 2014, 11:05:30 pm »

Test shifting by hand seems fine, shifts and locks into gears while turning the front sprocket. May be few times felt like false neutral but that could be because using my weak hand to turn sprocket???

Or may be I should have my mind set for a 3rd tear down...hmm....

MoMo · « **Reply #224 on:** January 09, 2014, 02:03:34 am »

Quote from: goldarrow on January 08, 2014, 11:05:30 pm

Test shifting by hand seems fine, shifts and locks into gears while turning the front sprocket. May be few times felt like false neutral but that could be because using my weak hand to turn sprocket???

Or may be I should have my mind set for a 3rd tear down...hmm....

That does seem normal. Good luck with it...Larry

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Author Topic: 1975 CB750 K5 SPYDER (Read 61369 times)