91 1500 left fork exploded view

[Johnf1059]

I need a exploded view of the left (sitting on the bike) fork on a 91 GL1500 Interstate. Does not have a anti dive unit on the left side. I’ve looked online and can’t find one for the left fork they always show the right side. The right is different from the left. Any help? Thanks.

[Erdeniz Umman]

Here is the picture from partzilla, #32 is the left one.
https://www.partzilla.com/catalog/honda ... front-fork

[Johnf1059]

Thanks for the reply Erdeniz my left fork is different than that. Mine has a sleeve in the bottom that has a flange on one end when I took the tube out the sleeve slid out and rolled across the floor and I’m not sure which way the flange goes up or down.

[Erdeniz Umman]

Thanks for the reply Erdeniz my left fork is different than that. Mine has a sleeve in the bottom that has a flange on one end when I took the tube out the sleeve slid out and rolled across the floor and I’m not sure which way the flange goes up or down.

Can it be the #6 piece called oil lock in the picture?

[Johnf1059]

No. The piece Im talking about is in the left fork. I’ve looked at a lot of pictures online but none of them look like mine for some reason.

[Erdeniz Umman]

Maybe it is not an OEM part, would you add a picture of the part for better comment?

Also, the part #6 shown in the picture is found in both forks of later models (I need to check for the exact date).

[Johnf1059]

I will but it will be a couple days

[Erdeniz Umman]

You replied while I was editing. Read the second paragraph in the previous post.

[Johnf1059]

Ok. my problem is after putting the forks back on the bike they bottom out when braking and hitting a bump. I’m also getting conflicting answers on the exact amount of oil in each fork.

[WingAdmin]

You haven't got enough fork oil in your forks. That's what damps (restricts) the movement. You're pushing air instead, which compresses (fork oil does not).

There are many different values for how much fork oil to put in, but you can ignore all of that. All you need is to fill the forks and measure from the top of the fork tube (with the cap removed) and no springs in it. Collapse the forks all the way, and add oil until it reaches this level from the top of the fork tube:

239mm / 9.4" for 88-94
194mm / 7.6" for 95-up

Once you've added the fork oil, it's very important that you pump the fork up and down several times, then measure/adjust the level again.

Many people will of course change fork oil without removing the cap or springs however. This is done by removing the schraeder valve from the fork cap and measuring from the top of the cap:




With the forks fully extended (front wheel dangling) and springs inside the forks:

400mm / 15.75" for 88-94 (Progressive springs installed tight end down)
406mm / ~16" for 88-94 (Progressive springs installed loose end down)
408mm / ~16.1" for 88-94 (OEM springs installed)
355mm / ~14" for '95+ (Progressive springs installed tight end down)
361mm / ~14.2" for '95+ (Progressive springs installed loose end down)
363mm / ~14.3" for '95+ (OEM springs installed)

I use a bent piece of wire as a dipstick to measure the fluid level:



You can read much more on this in How to rebuild your front forks

[Johnf1059]

Thanks wing admin. Do you happen to know about the sleeve I was talking about it’s in the left fork only.

[WingAdmin]

Thanks wing admin. Do you happen to know about the sleeve I was talking about it’s in the left fork only.

Can you post a picture of it, perhaps?

[Johnf1059]

When I get to the left fork and I’ll have to disassemble it to show you what I’m talking about. Should I disassemble it without putting a new seal in it or should the seal be ok sense I just replaced it?

[Johnf1059]

This is the right fork. The black Mark is 9.5” in which I aligned with the top of the fork tube. And at the bottom of the stick there is approximately 1/16” of oil on it. After pumping the fork several times. Don’t know if you can see the oil on the end of the stick or not. Wing admin. Look like the correct level?

[Johnf1059]

How precise does this need to be?

[bellboy40]

How precise does this need to be?

That is not a critical level. You can adjust it up or down to tune how you like the way it rides.