Author Topic: 1980 CB650c Rest-o by a crabby "old-timer" (Read 131051 times)

manjisann · « **Reply #525 on:** May 03, 2009, 04:59:11 AM »

Mystic, thanks for the pics and the links. I'll have to give it a look.

Kit, what kind of JB weld are you using on the pipes? Mine have road rash real bad on the cones but are otherwise in great shape. I was gonna try and fill in the gouges with welding rod, but my welding skills are not that great. Do you think if I remove the chrome and scuff it a bit that I could put the JB weld in, shape it and then paint it with high temp paint and it would stay??

Did you have a chance to hose down the boots with her running to see if you have an air leak? Maybe it's just hopeful thinking on my part (I would have contributed valuable knowledge

) but I'm thinking that is your hard start issue.

Brandon

MickeyX · « **Reply #526 on:** May 03, 2009, 08:04:18 AM »

Kit's at work today so I get to check things out in daylight and make small adjustments if needed. The new pipes did make a difference, in a good way. I really wish the left pipe off of Samson wasn't cracked through and nasty, but at least we have a local place that had a replacement.
Since the last synch, she changed back to the 8's on spark plugs from the hotter 7's, with the warmer weather coming. I'm wondering if, since she isn't the type to go out and wring the living #$%* out of her bike, if she should just stick with the 7's. Anyway, I'm not sure if she gapped them or not so I will pull them and check each one just to make sure. I'd like to see what they look like too.
I'll crank it up and let settle down into a nice warm idle and then I'll spray some brake clean on the boots, front and back, to see if anything changes. On Kit's instructions, I'll also pull the right side cover and air filter, reach in and make sure the back of the airbox is sealed in.
I also have to check the JB weld buttons to see if they are good to go, maybe clean them up a bit and spray some header paint on them so they don't stick out too much to the naked eye. It's just the way it is gents, we are chicks and looks count too, not just performance. As biker chicks, performance does come 1st though.

Then, as long as she's being a good girl, I'll take her out for a nice ride to really get her hot and then I'll shut it down and see if we get a clean restart or not. I'll give it a bump start to see if that goes smoothly too. I'd like to nail down the start issue before her parents come visit in June and also before we go on our 1st cycle camping vacation in July.

Then I hope to have some time left to put the windshield on my Harley. It's spring time which means buckets of rain and tons of bugs. (besides, I wouldn't want the Piglet to think it's being totally neglected.

)

Frankenkit · « **Reply #527 on:** May 03, 2009, 01:17:35 PM »

sounds like there're issues with my boot from carb 2 to the airbox... 'issues' like, the bugger won't go on all the way AND won't stay on. Ugh. So anyone have any pearls of wisdom for those? My previous method was sticking my hand through the airbox from the air filter hole and pushing it on, but it doesn't really work that great anyway. *shrug*

MickeyX · « **Reply #528 on:** May 03, 2009, 07:45:50 PM »

Eh, I got it figured out. It is seating nicely now. #1 was grumpy too. No air or fluid leaks anymore.

I took her for a ride after getting things clamped down and tight and she still seemed to hold back a bit, even when warm. She also hesitated on start up, hot or cold. So after a bit of cool down time, I pulled the plugs and checked the gaps. They were a bit off, so I set them all, reseated them and she cranked right over like she's been waiting all day for a ride. So, I threw on my jacket and helmet again and went for a longer ride. She felt a lot better this time, had really good response and power. I easily hit 55 in 2nd gear. It was a 35 zone or I would have pushed a little harder.

Overall, it was a lot of fun and felt almost as good as when it was freshly synched. I was able to feather the throttle on for take offs at around 1500-2000 rpms with no hiccups or feeling of stalling. It probably still needs a synch but it will be just fine as is until we can get to that.

As for the hot start... well, well, well... I had no such problems today. (after gapping the plugs that is) I shut her down, back up, down, up... she was always right there as soon as the button was touched. It does tell me a little something about changing the starter though. I know, even right after the last carb synch, that she wouldn't start that nice when hot. Much smoother now. One time she gave a slight thought before kicking right over but that's it. I even left the "on" button swithched to off and let it crank and crank and crank to try to draw down the battery a bit. Then I flipped the switch, hit the button and she immediately popped over. I hope it stays that way for a while.
I also tried the bump start when hot and she popped right over, no problem. I barely had to move her in 2nd gear to get a start.

I'd like to think this is solved but I'm not that naive. I'll wait until Kit puts some miles on her to see if it regresses.

For now...

Hush · « **Reply #529 on:** May 03, 2009, 07:59:39 PM »

Well done Mickey.

MickeyX · « **Reply #530 on:** May 03, 2009, 09:23:20 PM »

Thanks. Kit and Delilah worked me hard this weekend.

One thing I did notice, Hush, is the carb boots fit a certain way. It may be just because hers are old and not quite spongy anymore but there seems to be a slight bevel to them so when I spun them, there was definitely a way they fit better. Do you notice that on yours?

I really hope changing the starter will do it for Kit's bike. I wish I had checked the voltage but it didn't occur to me. I was just glad it started smoothly, ya know?

Hush · « **Reply #531 on:** May 04, 2009, 12:22:57 AM »

Not sure about the model Kit has but my old 79 ones def have to go on correctly, my pet mechanic showed me the wee arrows on the tops of the collars, these must go right on top when positioning the collars.

martino1972 · « **Reply #532 on:** May 04, 2009, 12:25:20 AM »

Quote from: Hush on May 04, 2009, 12:22:57 AM

Not sure about the model Kit has but my old 79 ones def have to go on correctly, my pet mechanic showed me the wee arrows on the tops of the collars, these must go right on top when positioning the collars.

I was gonna say something about the arrows....but I figured a ausie should be able to figure out that the arrows go on top....

750goes · « **Reply #533 on:** May 04, 2009, 01:05:16 AM »

Hey Martino, go look at an atlas - we disowned NZ years ago....
chopped it off and let them run amok by themselves...

they like sheep too much for us true aussies

Frankenkit · « **Reply #534 on:** May 04, 2009, 05:53:08 AM »

these aren't the boots with the arrows on them they're the ones from the carb to the airbox, but thanks for stating the obvious.

manjisann · « **Reply #535 on:** May 04, 2009, 09:24:05 AM »

Cut poor Hush some slack Kit, he is upside down spinning backwards after all

Brandon

Hush · « **Reply #536 on:** May 04, 2009, 09:53:57 AM »

Ah we banned Aussies, too many criminals ex Pongolia in the 1800's!
Boots/collars all same to me.

MickeyX · « **Reply #537 on:** May 06, 2009, 08:59:57 PM »

I just posted this in another guy's thread who is having problems getting his oil bolt out so he can change the filter. I realized that I forgot to post a pic here when we did it. Kit's "new" filter cover from when I had to grind the old bolt off... I like it better this way. I lost some DNA on that sucker.

Hush · « **Reply #538 on:** May 07, 2009, 01:02:30 AM »

You'll have to clean the rest of the engine now, that filter is way too clean.

manjisann · « **Reply #539 on:** May 07, 2009, 12:46:06 PM »

As I remember it, the engine was already pretty polished!

Brandon

MickeyX · « **Reply #540 on:** May 07, 2009, 06:23:38 PM »

That's funny, I said the same thing to Kit after I posted the pic.

Actually, that was all done after the oil spewed out of the gasket so the filter cover was the only thing to get cleaned. She does keep that bike pretty spotless usually.

It's supposed to be sunny and decently warm tomorrow. I hope the bike does well for her. It's the first time that Kit will have had a chance to ride it somewhere since the work was done on the filter, helicoil, carbs and plugs. I guess I'll have to ride in to work too so her bike doesn't feel all lonely sitting there in the lot. I know, sacrifice, sacrifice.

manjisann · « **Reply #541 on:** May 07, 2009, 07:18:41 PM »

Mickey, you have it so hard

Brandon

TripleDeuce · « **Reply #542 on:** May 07, 2009, 07:40:44 PM »

Quote from: Hush on May 02, 2009, 09:08:10 PM

I see we have a new forum member with a 79 650 charging problem, I introduced myself with a rundown of some of the things we thought it was..........maybe he will have better luck solving it!
He did mention he replaced the rotor, something I have yet to try so I'll go see my friendly wrecker and see if he will let me borrow one.

When I first got her 1 of the stator screws had come loose and let it fall and rub the rotor, cooking them both. So I bit the bullet and bought the "new" parts from the cycle graveyard. She charged great for about 75 miles and stopped. I really couldnt see these parts dying so quickly, so of course I became very frustrated. After doing some research here I decided to go out and check EVERYTHING again and what do you know, rotor resistance was out of spec. I had 1 more "new" rotor that I found laying in a bin at the scrap yard and it turns out that solved my problem, for now. Thank you to everyone on this forum for giving me ideas and inspiration to not give up.

Thanks, Shawn

Frankenkit · « **Reply #543 on:** May 07, 2009, 07:45:11 PM »

TripleDeuce · « **Reply #544 on:** May 07, 2009, 07:58:40 PM »

nice

Hush · « **Reply #545 on:** May 07, 2009, 09:41:10 PM »

Rotor seems to have solved part of my problem too Kit, not counting my chickens yet though.

Soos · « **Reply #546 on:** May 08, 2009, 07:51:04 AM »

Has anyone looked into what it would take to re-wrap one of these rotors themselves to re-build a bad one, or even make it better?

l8r

Frankenkit · « **Reply #547 on:** May 08, 2009, 08:09:17 AM »

yeah, leekellerking did that with his. I forget how much. Not too bad, as I remember. something-rewinds?

TripleDeuce · « **Reply #548 on:** May 08, 2009, 11:54:40 AM »

www.customrewind.com Seems pretty reasonable, I may have to go that route if my scrap yard rotor fails

$175 for a rotor AND stator with 1 year warranty. Oh hell yeah!!!!

Hush · « **Reply #549 on:** May 08, 2009, 04:08:43 PM »

Hey that's cheap as if it lasts like the last 30 year old one!
Even converted to Kiwi dollars (worth about as much as a Hungarian Zlotie) US $175= Kiwi $320 I'd pay that for reliability.

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Author Topic: 1980 CB650c Rest-o by a crabby "old-timer" (Read 131051 times)

TripleDeuce

TripleDeuce

TripleDeuce