« previous next »
Pages: [1]   Go Down

Author Topic: How do I set the valve timing?  (Read 1875 times)

0 Members and 1 Guest are viewing this topic.

Yas001

  • Guest
How do I set the valve timing?
« on: August 24, 2006, 11:34:18 PM »
I have been refreshing my 1978 750FII Super Sport. I supposed to finish up installing new head gasket by June... Now I realized I have no clue how to set up the valve timing. Would some one kindly advise how to set up the valve timing? The engine is all normal.

Thanks in advance,

Yas
Logged

Offline 750goes

  • Master
  • *****
  • Posts: 2,128
  • it will live
Re: How do I set the valve timing?
« Reply #1 on: August 24, 2006, 11:41:45 PM »
If you haven't got a manual you can download one here for free

link

http://www.honda4fun.com/spaccati/spaccati.html

and if you look in the FAQ section , there will be some hints in there as well

have a good read, and come back for stuff you can't work out  :)
Logged

Yas001

  • Guest
Re: How do I set the valve timing?
« Reply #2 on: August 25, 2006, 12:08:29 AM »
750goes,

Thanks for you relpy, however mine is 1978, SOHC. The page had only DOHC Fs...
Logged

Yas001

  • Guest
Re: How do I set the valve timing?
« Reply #3 on: August 25, 2006, 12:12:02 AM »
oops...my bad. F-1 on the page refers SOHC models. Thanks. Is this only parts list? or any other link for manuals on that page?
Logged

Offline 750goes

  • Master
  • *****
  • Posts: 2,128
  • it will live
Re: How do I set the valve timing?
« Reply #4 on: August 25, 2006, 12:23:51 AM »
Have a browse around on that site, it is there somewhere - I think I have a copy on my computer- not sure where I put it though..

 :)
Setting the valve timing is really the same on all SOHC models - just there may be some differences in the clearances between models..
Logged

Yas001

  • Guest
Re: How do I set the valve timing?
« Reply #5 on: August 25, 2006, 12:29:22 AM »
 :o Oh... OK so I can refer "K" model one... Thanks a lot!!!
Logged

Offline MrZxp

  • Hot Shot
  • ***
  • Posts: 368
Re: How do I set the valve timing?
« Reply #6 on: August 26, 2006, 02:55:05 AM »
Just in case you haven't managed to download that online shop manual??

Logged
09 Boulevard M90
SOHC4 Member #3336

Offline jtb

  • An unlikely
  • Expert
  • ****
  • Posts: 1,499
Re: How do I set the valve timing?
« Reply #7 on: August 26, 2006, 06:58:33 AM »
Hi Yas,

"Position the 1 and 4 pistons at TDC by aloigning the No. 1 and 4 'T' mark on the spark advancer with the index mark on the crankcase"
"Rotate the camshaft so the timing index line on the right end is parallel with the top surface of the camshaft holder"
This is from the Honda manual.  The square notch on the right end of the camshaft faces up.  Here is a bad scan of a bad scan.
Logged
1977 CB750F
1985 V65 Sabre
1986 VFR 750 (gone but missed greatly)

Offline jtb

  • An unlikely
  • Expert
  • ****
  • Posts: 1,499
Re: How do I set the valve timing?
« Reply #8 on: August 26, 2006, 06:59:47 AM »
Well... aloigning is spelled correctly in the manual ;D
Logged
1977 CB750F
1985 V65 Sabre
1986 VFR 750 (gone but missed greatly)

Offline DammitDan

  • Prodigal Son
  • Master
  • *****
  • Posts: 2,470
  • It lives!
Re: How do I set the valve timing?
« Reply #9 on: August 26, 2006, 08:31:59 AM »
Wait a minute...  What the hell is going on here?

I've always checked valve clearance by sliding the feeler gague between the cam lobe and the rocker arm.  Here it's being checked between the tappet screw and the valve itself.

Is it different for CB550s/CB650s than CB750s?
Logged
CB750K4

Offline bryanj

  • Really Old Timer ...
  • *******
  • Posts: 14,113
  • CB500 Number 1000036
Re: How do I set the valve timing?
« Reply #10 on: August 26, 2006, 08:35:24 AM »
Hi Dammit, only one checked at lobe is 650
Logged
Semi Geriatric ex-Honda mechanic and MOT tester (UK version of annual inspection). Garage full of "projects" mostly 500/4 from pre 73 (no road tax in UK).

Remember "Its always in the last place you look" COURSE IT IS YOU STOP LOOKIN THEN!

Offline Bob Wessner

  • "Carbs Suck!"
  • Really Old Timer ...
  • *******
  • Posts: 10,079
Re: How do I set the valve timing?
« Reply #11 on: August 26, 2006, 08:37:45 AM »
Is there some confusion here between valve timing and valve clearance? ??? ???
Logged
We'll all be someone else's PO some day.

Offline Bodi

  • Really Old Timer ...
  • *******
  • Posts: 5,701
Re: How do I set the valve timing?
« Reply #12 on: August 26, 2006, 08:50:37 AM »
No confusion here :)
But timing is the cam itself - the chain on the sprocket, or maybe you have the slotted sprocket and need a degree wheel and cam specs to set it...
The notch or line or flat on the cam should be up or down with the crank at 1-4 TDC. Either way, but it has to be one or the other. One turn of the crank, back to 1-4 TDC, will flip the mark over.
Clearance is the tappet adjustment... or changing shims on most DOHC bike engines.
Logged

Yas001

  • Guest
Re: How do I set the valve timing?
« Reply #13 on: August 26, 2006, 09:47:12 PM »
Thanks guys, but I got new problem today. As I almost finished up removing old head gasket and fill with excitement to put new head gasket. I was dreaming taking my F to work in couple days... I realized that the cam chain tensioner upper wheel (pulley) has funny shape. It has been grinded in half. Where do you guys purchase this kind of thing? Honda dealer or do you all have some information for good web site? I am in North Carolina, US. BTW, my original question on this posting was how I can set the cam timing after rebuilt the motor... maybe my way of questioning was bad. Thank you for all info. you guys gave anyway!!

yas
Logged
Pages: [1]   Go Up
« previous next »