Topic: Not sure of which forks I have/how much fork oil to use

[tmac]

OK So I find out the P.O. installed an 81 air assisted front end on the 78 750K that I own. I am currently rebuilding the forks and just measured the upper tube. It measured 23 5/8. My question is I guess : Which front end do I have & how much oil goes in each tube? I put 6 oz. atf in each leg.I think they need some more fluid but I dont wanna make the new seals leak by over filling!! Also gonna hafta return the new springs I got because they are only around 19 inches long, wish I measured em before ordering. Dohhhh 

[HondaMan]

Maybe a picture of the forks would help? There's many that will fit these bikes.

[tmac]

I cant get any pics to post. it keeps reading " request entity too large"? Hondaman sir, Thank you for the reply. I was told that the bike had a frozen front caliper when it was nearly new & the PO threw the whole front end away(yes sir, I said threw away, as in tossed in dumpster someplace. What a maroon !) and swapped an air assisted front end from a 1981 CB750K. Gonna keep trying to post pics.
 

[Xnavylfr]

I know that some Magnas, Sabers ,CB900c (37mm), 75-77 wings (37mm)used airassist forks.



Xnavylfr(CHUCK)

[onepieceatatime]

The 1981 CB650 has air assist forks. They are 35mm. I have a set in need of seals that I will be taking apart (probably tomorrow) that I can measure the tube length for you. If they are for the '81 650, here is the oil capacity chart from my clymer manual.

[ekpent]

Lower the pixel setting on your camera to make a 'smaller' picture or use a free online photo service to reduce the size and then you can post up some pics 

[onepieceatatime]

I cant get any pics to post. it keeps reading " request entity too large"? Hondaman sir, Thank you for the reply. I was told that the bike had a frozen front caliper when it was nearly new & the PO threw the whole front end away(yes sir, I said threw away, as in tossed in dumpster someplace. What a maroon !) and swapped an air assisted front end from a 1981 CB750K. Gonna keep trying to post pics.

I missed this part and was going off the title on my previous post. The service manual for 79-83 CB750K says drain and refill capacity is 155cc (5.2oz) and rebuild capacity is 172.5-177.5cc (5.8 to 6.0oz)

[lucky]

Why don't you buy a workshop manual for your motorcycle?

[tmac]

I have 2 workshop manuals thank u sir. They are for a 1978 CB750K. The front end is an 81. Should I buy a manual to see how much oil they take or just ask u friendly helpful chaps on here? Thanks so much and have a great day.

[tmac]

The tubes are 35mm sorry,

[Roach Carver]

I cant help you but if you get a pic up or set up a free photobucket account and post that way you will have your answer shortly I imagine.

[tmac]

Thanks Bro !

[tmac]

lowered pixels hope this works

[Roach Carver]

Those look a lot like my 77 cb750f forks.

[tmac]

it only has 1 caliper mount on the left side. didnt Fs have dual fronts?

[Roach Carver]

Yes. Fork volume would likely be the same. Not sure if thats the same fork though.

[754]

 Try 5 -6 oz should be fine...

[tmac]

Thanks 754 !