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Author Topic: Splitting the cases on my CB750...first of many ?'s  (Read 82197 times)

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Offline ekpent

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Re: Splitting the cases on my CB750...first of many ?'s
« Reply #275 on: June 25, 2010, 08:00:25 PM »
Your kid still over here at WMU Ron?? Git in there and lets see what you may need.   Eric in the Zoo
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Offline ron.cieri.313

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Re: Splitting the cases on my CB750...first of many ?'s
« Reply #276 on: June 25, 2010, 08:11:57 PM »
yep...thanks Eric...will shall see shortly...stay tuned!
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Offline ron.cieri.313

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Re: Splitting the cases on my CB750...first of many ?'s
« Reply #277 on: June 29, 2010, 07:39:22 PM »
Okay, here's the dealio...don't know if i installed a bad drum or I broke it (maybe testing it without enough lubrication) but here's what a broken looked like.  I had to take it to a very knowledgable Honda guy who saw it right away and then handed my magnification lenses as he corrected noted..."ah see your just about the age where your eyes start go"...so sadly true. :-[...its the little shining spot that indicates part of the point which pushes the gear into second, it worn or broken off...consequently, the gear was not being pushed in all the way.



Which apparently then caused this wear on the gear and the shift fork...both have been replaced...with an NOS gear (forget its name...furthest to the left of the bike) and all gear on the countershaft with good used ones from same Honda guy (so, Eric, I think I'm set...for now ;)



So good news is that we were able to quickly identify the problem and ready to sew this patient back up for a second time...not so much gasket goo this time as somebody correctly warned me about previously.

I'm on vacation next week...trail riding on my '79 XL250S ;D...well, at least a good portion of the week if things go as planned.

will keep you all posted...thx.
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Offline mystic_1

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Re: Splitting the cases on my CB750...first of many ?'s
« Reply #278 on: June 30, 2010, 05:18:53 AM »
Whew!  Glad you found a readily identifiable cause for your problem.  I will burn some synthetic oil on the alter of the gods of speed to bring the rest of your project good fortune.

Since you're in there again I'd go over the rest of the parts carefully, mic the shafts, etc, just to be prudent.  Best wishes, keep us posted.

mystic_1
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Offline ekpent

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Re: Splitting the cases on my CB750...first of many ?'s
« Reply #279 on: June 30, 2010, 05:55:16 AM »
Hey Ron,thats good news on your tranny,glad you found a good Guru.Your not going to be up around the Traverse City area by chance next week are you?? I will be camping at Green Lake in Interlochen for some fishing etc.,will have a couple of 750's with me if you want to do a ride??Grab one and lets Go  :D   Eric
« Last Edit: June 30, 2010, 06:07:41 AM by ekpent »
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Offline ron.cieri.313

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Re: Splitting the cases on my CB750...first of many ?'s
« Reply #280 on: June 30, 2010, 12:05:22 PM »
Yes, please burn much oil to the Gods of speed...

...i'll be in Cheboygan, a good 2+ hours from Traverse although, the offer is generous and very tempting, I'll prolly pass...but, hmmm, let's see actually riding a 750 that works...that would be like seeing the holy land for the first time.



Question for all, the 3 bearings on the main shaft...there is a crease in the top half of the crankcase for half of a metal retaining ring for each bearing but none in the bottom half.  So, did I lose the other halves of the retainig rings (cuz i can't find them) or do then NOT exist?...I'm assuming the later cuz of the absence of fitting groves....thanks!...ron.
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Offline nobody

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Re: Splitting the cases on my CB750...first of many ?'s
« Reply #281 on: June 30, 2010, 01:25:48 PM »
Wow, that's some pretty substantial damage. You're on a roll here Ron, though your first gear destruction was a little better. I expect you to step it up and have plenty of shrapnel next time...

I'm glad to hear that you're making progress. I can't wait to see it back together and functional again.
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Offline ron.cieri.313

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Re: Splitting the cases on my CB750...first of many ?'s
« Reply #282 on: June 30, 2010, 01:27:11 PM »
Lol...yes, i expect to just start exploding part like in a cartoon soon
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Offline ron.cieri.313

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Re: Splitting the cases on my CB750...first of many ?'s
« Reply #283 on: June 30, 2010, 06:33:37 PM »
hi all...i know my description of my question sucked...so here's a reference pic


see the groves circled in red?...is there a half retaining ring thats suppose to go in there?...there is one underneath the main shaft in the spots but don't know if I'm missing the possible ones on top...I don't think so cuz I think this remains empty as there is no matching groove on the mated surface on the other half of the crankcase....thx
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Offline ekpent

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Re: Splitting the cases on my CB750...first of many ?'s
« Reply #284 on: June 30, 2010, 06:55:15 PM »
I sent one of those clips to Oldin836 in Australia recently,located by the primary chain sprocket and remember that there is just one clip that fit into the top half of the case with its groove.  Have fun on those trails up north,thought maybe you and the family might have been heading to the National Cherry Festival in Traffic, er, I mean Traverse City  :D
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Offline ron.cieri.313

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Re: Splitting the cases on my CB750...first of many ?'s
« Reply #285 on: June 30, 2010, 08:34:01 PM »
ah, excellent...about the clip i mean...yes, another reason I don't want to go near traverse city...the trails are mostly empty!...except for the occasional atv or motorx young blood...thx eric.
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Offline HondaMan

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Re: Splitting the cases on my CB750...first of many ?'s
« Reply #286 on: June 30, 2010, 09:26:11 PM »
There is only a half-round retainer in there, Ron, not all the way around. ;)
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Offline ron.cieri.313

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Re: Splitting the cases on my CB750...first of many ?'s
« Reply #287 on: July 01, 2010, 05:44:51 AM »
thx Hman!...I'm ready to put this suckker back together
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Offline ron.cieri.313

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Re: Splitting the cases on my CB750...first of many ?'s
« Reply #288 on: July 04, 2010, 02:59:31 PM »
Cases are back together...using the torque wrench setting (thx marc) really helped taked some of the angst out of the process...also, used a hobby brush to apply the gasket goo which helped me achieve a nice thin, even coverage layer...sometimes its the simple things that work so well.

...I'm on vacation so I won't be putting her back in the bike anytime soon but I feel really good about where she's at...fingers x'd!!!
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Offline ron.cieri.313

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Re: Splitting the cases on my CB750...first of many ?'s
« Reply #289 on: July 19, 2010, 08:24:38 AM »
Okay, Engine is back in the frame and putting things back in place, another free weekend and we should be ready for a trial run...I will be soooooooooo nervous...fingers x'd.
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Offline ekpent

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Re: Splitting the cases on my CB750...first of many ?'s
« Reply #290 on: July 19, 2010, 08:45:49 AM »
Good luck Ron,we will all have our fingers crossed for you. Hope your trip was fun up north. Son and I were up there at the same time on a couple of 750's and on a ride around the Traverse City - Leland area we were stopped by 3 English guys,one of which was Rick Brett,one of the biggest Kawasaki Triple dealers in the world. Invited us to his warehouse and home to see what was probably over 50-60 triples stashed away. In one bedroom were some with less than one mile.  ::)    http://www.classickawasaki.com/
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Offline ron.cieri.313

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Re: Splitting the cases on my CB750...first of many ?'s
« Reply #291 on: July 19, 2010, 08:48:07 AM »
oh lord...color my jealous fer sure!
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Offline gnarlycharlie4u

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Re: Splitting the cases on my CB750...first of many ?'s
« Reply #292 on: July 21, 2010, 12:59:25 PM »
wow what an epic read.
I was totally not expecting something so massive or informative when I clicked on this thread.

Thanks for all the awesome information and wonderful pics. Best of luck to you!

I feel inspired to split my case as well. I know I have a lot of cleaning to do on it so I might as well crack it and check on everything since I was going to seafoam it anyway.
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Offline ron.cieri.313

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Re: Splitting the cases on my CB750...first of many ?'s
« Reply #293 on: July 22, 2010, 12:32:01 PM »
inspiring others to madness...hmmm, sounds about right?...no really, thanks and go for it...with help for the great pool of experts on this site, they can get you through just about anything.

...current status...carbs and drive chain still need to go on...tonight, I hope to check the timing (statically)
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Offline ekpent

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Re: Splitting the cases on my CB750...first of many ?'s
« Reply #294 on: July 22, 2010, 05:50:51 PM »
OOOOH - We are getting close to the moment of truth. Sounds like a little putt putt is going to be happening this week-end.I really hope for the best Ron, with all the work you have put in you deserve a few good months of enjoying your ride.Will be looking for the good news soon.
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Offline ron.cieri.313

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Re: Splitting the cases on my CB750...first of many ?'s
« Reply #295 on: July 24, 2010, 03:38:49 PM »
Putting only in place right now but she is running with a new used stock air box installed...she sounding pretty good....waiting on the drive chain in the mail and still have to sync the carbs...but trial run should happen next week...of course will keep you all posted.

I used a synthetic oil blend this time...stuff is expensive!...but at this point, I want every little edge i can get.

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Offline ekpent

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Re: Splitting the cases on my CB750...first of many ?'s
« Reply #296 on: July 25, 2010, 06:17:00 AM »
Put a bicycle chain on it  :) The suspense is killing us  ;D
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Offline ron.cieri.313

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Re: Splitting the cases on my CB750...first of many ?'s
« Reply #297 on: July 25, 2010, 03:51:45 PM »
Lol...yes, I'm tempted but waiting, waiting by the mailbox..c'mon mr. postperson!

She is now sync'd.
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Offline ron.cieri.313

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Re: Splitting the cases on my CB750...first of many ?'s
« Reply #298 on: July 28, 2010, 05:56:12 PM »
What will madness drive a man to do...how about push his bike almost 1/2 a mile to the dealership so someone could actually put this damn o-ring chain on with the rivet master link.

...but you know how this story ends...it has a hollywood ending...getting dropped off at the dealership...eagerly paying whatever takes to get his bike back...of course the dealer service dept. wants to keep it over night to repair the brittle speedo cable they snapped will fixing the slow leak on my front tire..forget it...i'll pick up the cable tomorrow, give me the bike.

so I'm at the dealership, start her up, pull in the clutch and am ready to put her in gear...man i hope this clutch works...kick down and she slides into first nicely...ah...the service guy is like "didn't u drive her here"..."nope maiden voyage, wish me luck"...and release the clutch and she riding nice...here's the moment, pull out of the drive, time to kick her up into second, sounds good, release the clutch, she's in second, give her gas and she holds nicely...holy #$%* could she really be fixed...drive her around for another taking little breaks to adjust the air pilot screw and no probs!..ah the long sometimes tiresome road to minor success...


...wait, the damn neutral is staying on..wtf...well, so it continues but at least with a second gear!...thanks all for your support, help and aid!...ron.
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Offline ekpent

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Re: Splitting the cases on my CB750...first of many ?'s
« Reply #299 on: July 28, 2010, 08:24:08 PM »
Nice story Ron-you had me on the edge of my seat for that first up shift.Glad you are back in business,you deserve some good rides for the rest of the summer.Problem is probably just in the little neutral switch on the bottom of the case.Get out there and giver' hell.
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