Need inner fork tubes. Will 1989 fit on a 1984?

[ChurchBuilder]

I took my forks apart today to find out why the seals go bad so often. Found scratches on the inner tubes that I don't think I can sand out. Does anyone know what range of years will fit a 1984 Venture?

[Squidley]

I just looked that the parts breakdown for the inner tubes, the part #'s have a couple different prefixes.

The '83 is 26H-23110-00-00, the '84 and '85 are 41R-23110-00-00, I checked the '86 which was the 1st year of the 1300cc MKII and it's part # and the '89 were the same at 3JJ-23110-00-00

I'm not sure what differences the prefixes make in the part, but I dont think they are different, I'll bet they are all the same part. I'll let some others chime in that might have a little better insight about the prefix numbers. I do have 2 sets of MKI '83 to '85 forks that I believe are in reasonable shape. If you'd like I could take a look and see what the tubes look like if you would need them.

[MiCarl]

They are different. The 23110 indicates it's a fork tube. 23H or 41R indicate the first model that used the tube.

 

For instance, the fork tube from a 1982 XJ650 is 4H7-23110-00-00 which is quite a bit different from a Venture tube.

 

What you cannot determine from the part number is whether the difference is significant. If Yamaha intended a substitution the fiche for the 84 would probably show it superseded by the 3JJ part.

[frankd]

Light scratches won't tear up seals, but nicks from rocks hitting the tube will. You can use a piece of a woman's panty-hose, and rub it on the fork tube. If you have a nick, it'll tear the piece of panty-hose. You can also get somebody with good eyes inspect the tube for nicks. On my 83, I was going through fork seals on the right fork every few months. I looked and couldn't see anything. I was told to inspect it closer because there was something that was tearing the seals. I finally found the nick, cleaned it with 600 emery paper and the same seals have been on there for at least 10 years now, and still dry. Remember that you only have to inspect the portion that passes through the fork seals.

 

Frank D

[Pegasus1300]

If you can find an old line mechanic or machinist and ask him for some crocus (sp) cloth.Dip it in solvent or kerosene and wrap a strip around the fork tube and pull it back and forth unti the nick/scratch is gone. I polished up a set of tubes this way that have kept their seals for 5 years now.

[skydoc_17]

Hey Pete,

Don't even bother worrying weather or not the fork tubes from the other years will fit! Swap out the entire front forks/triple tree from an MKII VR. (1986 to 1993) This will allow you to go to the 4 piston front calipers and larger front rotors, increasing your braking performance greatly. The steering head bearings/goose neck on the MKI and MKII bikes are the same. I have several MKII front ends with calipers and rotors. It would be my pleasure to help you with this project!

Earl

[ChurchBuilder]

EarlI may just do that upgrade. The scratches are below the seal bet fairly deep. I don't think they'll sand out. I will be needing new inner tubes at least.

[bongobobny]

What Earl said!! It does make a significant difference!! To keep the antidive function, just add a relay and use the brake wire (yellow) on the primary of the relay and ground. The secondary is just 12 volts on one contact and both white wires on the other. Ground the black wires and you are good to go!

[Condor]

Hey Pete,

Don't even bother worrying weather or not the fork tubes from the other years will fit! Swap out the entire front forks/triple tree from an MKII VR. (1986 to 1993) This will allow you to go to the 4 piston front calipers and larger front rotors, increasing your braking performance greatly. The steering head bearings/goose neck on the MKI and MKII bikes are the same. I have several MKII front ends with calipers and rotors. It would be my pleasure to help you with this project!

Earl

 

 

My thoughts exactly....