Search found 12 matches

by Cb673
Tue Nov 27, 2018 9:27 pm
Forum: General Discussion
Topic: Carb valve things
Replies: 7
Views: 2859

Re: Carb valve things

The tubes we're a "safety" item, meant to keep gas dripping onto a hot motor.


L8r
by Cb673
Tue Nov 27, 2018 9:24 pm
Forum: General Discussion
Topic: Cb750 ignition
Replies: 5
Views: 2116

Re: Cb750 ignition

Me either, but it would be a interesting project though.

L8r
by Cb673
Fri Nov 23, 2018 9:47 pm
Forum: Technical Discussion
Topic: My '79 cb650 62mm overbore project.
Replies: 3
Views: 1470

Re: My '79 cb650 62mm overbore project.

I've been debating whether or not to put my 62mm pistons in the stock motor under my bench, or use the one with the worked over head that has the 61mm overbore in it already. Decided the flow benched head should be paired with the overbore, so I'm tearing into a known recently running motor in hopes...
by Cb673
Mon Oct 29, 2018 10:52 pm
Forum: General Discussion
Topic: Engine displacement vs stated CC's ???
Replies: 3
Views: 4581

Re: Engine displacement vs stated CC's ???

The cb650 displaces 627cc. The 750 displaces 726cc....



And I'm going with the 696. Comes to the displacement plus the 23 head cc's(noticed I said 24 earlier..oops)

L8r
by Cb673
Mon Oct 29, 2018 10:47 pm
Forum: Show it off
Topic: My piston sets and fixtures.
Replies: 3
Views: 13097

Re: My piston sets and fixtures.

Yes I am a machinist. Trained in '98/'99 been in the trade ever since. Lots of repair shops, manual machines, and vtl lathes. I'm CNC functional.... more a fat finger at the console programmer than a mastercam user. (mastercam writes the program for you once you draw the part in 3-d in mastercam) I ...
by Cb673
Tue Oct 16, 2018 12:42 am
Forum: Show it off
Topic: My piston sets and fixtures.
Replies: 3
Views: 13097

My piston sets and fixtures.

I've had a few 650's and someone Once said I can't get overbore pistons..... http://i350.photobucket.com/albums/q429/Purplechickenweasel/IMG_20181015_222648_zpsgrn9daha.jpg So I have 66, 64.75, 62, 61 and 60mm piston sets I have modified for the 650. Most for stock cam, 1 set for turbo, 2 550 sets, ...
by Cb673
Tue Oct 16, 2018 12:17 am
Forum: Technical Discussion
Topic: My '79 cb650 62mm overbore project.
Replies: 3
Views: 1470

Re: My '79 cb650 62mm overbore project.

Here is the cabinet -o- parts for my 650. http://i350.photobucket.com/albums/q429/Purplechickenweasel/IMG_20181015_214902_zpshoktdirx.jpg The bottom area is cb650, and cb550 overbore pistons sets, fixtures, and fabrication prints and notes. 66, 64.74, 62, 61 cb650 overbore sets, and 61mm cb550 pisto...
by Cb673
Mon Oct 15, 2018 11:46 pm
Forum: Technical Discussion
Topic: My '79 cb650 62mm overbore project.
Replies: 3
Views: 1470

My '79 cb650 62mm overbore project.

Here's a pic of my bike, looks sad though. http://i350.photobucket.com/albums/q429/Purplechickenweasel/IMG_20181001_184819_zps8wwvtsja.jpg As it sits, it's running nice. Is is running '85 600cc ninja carbs, 61mm pistons and sadly a 550 stock cam with a slotted cam gear. Yes the thank looks ratty, ha...
by Cb673
Sun Oct 07, 2018 10:29 am
Forum: General Discussion
Topic: Engine displacement vs stated CC's ???
Replies: 3
Views: 4581

Engine displacement vs stated CC's ???

Hello all, So the cb650 is bore x stroke is actually 627cc, with head chamber of (?) 24cc. Making roughly 650 when added together. If a motor were bored out, and one wanted to put cb"XXX" on the side covers, should the head 24cc's be added as well? I'm doing a 62mm overbore soon, and don't...
by Cb673
Sun Oct 07, 2018 10:05 am
Forum: General Discussion
Topic: Hello all
Replies: 3
Views: 1855

Re: Hello all

Yes it's a stock 550 cam using a 5 degree slotted cam gear.
I would have changed it long ago, but if I tear into this motor I know there is at least 1 almost stripped out thread in the head, and have been putting off helicoiling the holes.(thread repair insert)

L8r
by Cb673
Wed Oct 03, 2018 7:53 pm
Forum: General Discussion
Topic: Hello all
Replies: 3
Views: 1855

Hello all

I've lurked a lot, and learned a lot as well. Thanks for all the ideas, fixes, and such.... Anyway, ive been riding my '79 650 for about 14 years now. Wrenching, cursing and smiling along the way. Loving the Estacada,OR area. Haven't gotten the picture resizing to work yet... So... my '79 is.... mod...
by Cb673
Wed Oct 03, 2018 7:22 pm
Forum: General Discussion
Topic: G’day! I’m an Aussie in Canada with a 1979 CB650!
Replies: 4
Views: 2111

Re: G’day! I’m an Aussie in Canada with a 1979 CB650!

Nice '79 there. First red one I've seen, not bad.
Noticed the carbs are not stock.
Are those off a cb750?


L8r

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