Front & Rear general questions

Fastwater · Post by **Fastwater** » Sat Apr 25, 2009 6:20 pm

1964 Superhawk CP77
I am 5'10" and 135lbs (this will make sense later)

I beautiful day today gave me a chance to change the fork oil and do a minor tune up. As I took her for a quick run I realized that the bouncy suspension wasn't do to insufficient fork oil as I originally suspected. I put 200cc (7.1 oz) as I always do, but still the front forks leave me bottoming out on big bumps and slightly rocking as I come to a stop. The rear aren't much better. The seals don't leak and I emptied out the correct amount. I wonder if it is just the nature of forty year old technology? I'm a bit of a purest so I would like to avoid after-market. I'm not a "big guy" and would have expected something a little better. They don't seem to be damaged but just sub par.

Has anyone else experienced this? Is there anything I can do to the existing parts to help on these bumpy New York streets.

Cheers!

LOUD MOUSE · Post by **LOUD MOUSE** » Sat Apr 25, 2009 7:10 pm

What weight oik?. .............emo

Fastwater wrote:1964 Superhawk CP77
I am 5'10" and 135lbs (this will make sense later)

I beautiful day today gave me a chance to change the fork oil and do a minor tune up. As I took her for a quick run I realized that the bouncy suspension wasn't do to insufficient fork oil as I originally suspected. I put 200cc (7.1 oz) as I always do, but still the front forks leave me bottoming out on big bumps and slightly rocking as I come to a stop. The rear aren't much better. The seals don't leak and I emptied out the correct amount. I wonder if it is just the nature of forty year old technology? I'm a bit of a purest so I would like to avoid after-market. I'm not a "big guy" and would have expected something a little better. They don't seem to be damaged but just sub par.

Has anyone else experienced this? Is there anything I can do to the existing parts to help on these bumpy New York streets.

Cheers!

Fastwater · Post by **Fastwater** » Sat Apr 25, 2009 7:18 pm

SAE 30

You thinking I should go with something less viscous?

davomoto · Post by **davomoto** » Sat Apr 25, 2009 7:26 pm

You can try a heavier weight oil in forks, and or add a spacer to stiffen fork springs. Start with a 1/2 inch long spacer in each side, and go longer untill it feels right. This will make the forks rebound faster, so you will need a heavier oil. For the rear, I've had excellent luck with redwing rear shocks. They're on ebay often, and really affordable. The handling difference is impressive, and the won't bottom out over a matchbook. Here's a link to a set on ebay now.

davomoto

http://cgi.ebay.com/ebaymotors/REDWING- ... 240%3A1318

Fastwater · Post by **Fastwater** » Sat Apr 25, 2009 7:31 pm

Brilliant! I'll give it a try in the morning.

Lemme now if you're ever on the East Coast!
I may owe you a beer.

Cheers.

LOUD MOUSE · Post by **LOUD MOUSE** » Sat Apr 25, 2009 7:38 pm

That's what I use with no problems. (weigh 230 pounds). ...........lm

Fastwater wrote:SAE 30

You thinking I should go with something less viscous?

deez · Post by **deez** » Tue Sep 08, 2009 2:51 am

a fastwater did that trick help the front forks from bottoming out? i have had the same problem occur a couple of times today.
-cheers
-deez

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