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Wheels, Suspension and Brakes
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Thread: Tell me about fork oil / very soft front suspension Reply to Thread
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  Topic Review (Newest First)
03-16-2009 07:36 PM
lance328
Quote:
Originally Posted by robardin View Post
The tires are stock Exedras so I assume the manual and sticker on the bike would give the right figure... However I wasn't aware the front shocks had air assist also! I did get a special pump to handle the rear shocks, I'll look for the same thing on the front. Makes sense if any fork seals were broken that the air for the shocks would also be let out!

ETA: Hmm, was true only up until 1988 year models? I have a 1994. Darn!
They stopped using it because too many people would over pressurize and blow the seals.
03-16-2009 06:22 PM
Knifemaker
Quote:
Originally Posted by niterider View Post
The spacer is underlined in blue ink. It is about 2 t0 3 in. long.


Actualy it is 9 inches long...(the spacer)


If they forgot it the front end would sag.



KM
03-16-2009 06:21 PM
robardin
Quote:
Originally Posted by lance328 View Post
Check the tire pressure rating on the tire, different tires have different ratings. That's another thing i like about the older models, they have air assist front and rear suspension. If it feels a little soft just add some air.
The tires are stock Exedras so I assume the manual and sticker on the bike would give the right figure... However I wasn't aware the front shocks had air assist also! I did get a special pump to handle the rear shocks, I'll look for the same thing on the front. Makes sense if any fork seals were broken that the air for the shocks would also be let out!

ETA: Hmm, was true only up until 1988 year models? I have a 1994. Darn!
03-16-2009 06:12 PM
lance328
Quote:
Originally Posted by robardin View Post
Well this gets interesting, not in a good way though, especially in light of Knifemaker's comment about how the stock front springs "are kind of soft to begin with".

I didn't have the time to go over to the shop in person today with my bike, but here's some more to my story. Thanks for putting up with the newbie.

First, I re-double-checked the air pressure in the front tire. It had been a little bit low when I checked it after riding it home on Saturday, just under 26 PSI where the sticker on the bike says the front should be at 28 PSI. That's for a cold tire though, and the tire may have been warmed up enough when I checked it at 25.5 PSI that it could indicate a pressure problem, so I let it cool overnight and topped the air off to about 29 PSI.

Now this morning, riding in to work, it was definitely better. I did bottom out a bit on the front end once or twice, but only when hitting an actual bump up in the road (like a metal street plate), and not as badly as before where I really thought I was going to blow out my front tire. Ordinary potholes and dips felt a little bit soft, but not like I was bottoming out.

I called the shop after they opened today and they were adamant that they filled the fork oil properly -- insulted even. Like I said, I couldn't find the time to take off from work to bring it back to them, but given my experience riding in the morning, I agreed to re-evaluate my position.

I have had my bike for 7 months, and I'm like the 5th owner of the bike (it's a 1994 model I got with over 23,700 miles on it). I hadn't changed the fork oil yet. They said it was leaking as a result of getting knocked over, which I could believe, and showed me the oil covered seals they swapped out.

Is it possible that the former owner had put in some non-stock fork oil or put in more than the factory specified amount, to get a different feel to the front end than a truly stock bike would feel like?

Maybe it is all in the front tire pressure? I'll check it again before riding home and see if the cold pressure's still at 28 PSI. If it's back down to 25 or so then I guess I have a hole/leak somewhere as a result of getting hit, which would account for everything, though I wouldn't have thought 3-4 PSI meant so much to the feel of the front end.
Check the tire pressure rating on the tire, different tires have different ratings. That's another thing i like about the older models, they have air assist front and rear suspension. If it feels a little soft just add some air.
03-16-2009 05:38 PM
robardin Well this gets interesting, not in a good way though, especially in light of Knifemaker's comment about how the stock front springs "are kind of soft to begin with".

I didn't have the time to go over to the shop in person today with my bike, but here's some more to my story. Thanks for putting up with the newbie.

First, I re-double-checked the air pressure in the front tire. It had been a little bit low when I checked it after riding it home on Saturday, just under 26 PSI where the sticker on the bike says the front should be at 28 PSI. That's for a cold tire though, and the tire may have been warmed up enough when I checked it at 25.5 PSI that it could indicate a pressure problem, so I let it cool overnight and topped the air off to about 29 PSI.

Now this morning, riding in to work, it was definitely better. I did bottom out a bit on the front end once or twice, but only when hitting an actual bump up in the road (like a metal street plate), and not as badly as before where I really thought I was going to blow out my front tire. Ordinary potholes and dips felt a little bit soft, but not like I was bottoming out.

I called the shop after they opened today and they were adamant that they filled the fork oil properly -- insulted even. Like I said, I couldn't find the time to take off from work to bring it back to them, but given my experience riding in the morning, I agreed to re-evaluate my position.

I have had my bike for 7 months, and I'm like the 5th owner of the bike (it's a 1994 model I got with over 23,700 miles on it). I hadn't changed the fork oil yet. They said it was leaking as a result of getting knocked over, which I could believe, and showed me the oil covered seals they swapped out.

Is it possible that the former owner had put in some non-stock fork oil or put in more than the factory specified amount, to get a different feel to the front end than a truly stock bike would feel like?

Maybe it is all in the front tire pressure? I'll check it again before riding home and see if the cold pressure's still at 28 PSI. If it's back down to 25 or so then I guess I have a hole/leak somewhere as a result of getting hit, which would account for everything, though I wouldn't have thought 3-4 PSI meant so much to the feel of the front end.
03-15-2009 10:28 PM
niterider The spacer is underlined in blue ink. It is about 2 t0 3 in. long.
03-15-2009 09:44 PM
robardin
Quote:
Originally Posted by niterider View Post
Could it be that they left the top spacer out??
I find your ideas intriguing, and would like to subscribe to your newsletter.
03-15-2009 08:48 PM
niterider Could it be that they left the top spacer out??
03-15-2009 07:03 PM
prew I put automatic transmission fluid in my honda cb400,the manual called for it..I liked it better than fork oil...I plan to use the same in the vn750....
03-15-2009 06:02 PM
niterider I used hydralic jack oil. It states on the use for section that is is good for motorcycle fork oil.
The manuel specifies the amount of oil to use and how to massure it.
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