Sag?

ReaperAZ · 03-24-2006, 11:04 AM

Any of you 600RR guys set your sag? If so what do you have it at? What's an average amount of sag?

HondaGalToo · 03-24-2006, 12:16 PM

Good question! I know what it should be for 929/954, but are those numbers the same for all bikes? Always wondered about that...

ReaperAZ · 03-24-2006, 12:21 PM

I want to say I heard someone say between 25-35mm but that seems like a big margin. We set mine last night to about 29 front and rear. Certainly isn't the most comfortable street ride but it rails in the corners.

ReaperAZ · 03-24-2006, 12:22 PM

Quote:

Originally Posted by HondaGalToo

Good question! I know what it should be for 929/954, but are those numbers the same for all bikes? Always wondered about that...

By the way, what should it be for the 29' and 54's? We wanted to set SPY's last night and didn't know the number. TIA HGT.

BDA116 · 03-24-2006, 12:23 PM

I haven't really messed with it as I'll be getting the forks done and a new shock anyway.

sheepofblue · 03-24-2006, 1:27 PM

At the Ohlins seminar they specified sag as a function of total travel. This makes sense as it is to put the fork into the middle of it's operating area so it's works on topout also. Can't remember the % though (video is at the sheepfold)

abtech · 03-24-2006, 1:30 PM

Quote:

Originally Posted by sheepofblue

At the Ohlins seminar they specified sag as a function of total travel. This makes sense as it is to put the fork into the middle of it's operating area so it's works on topout also. Can't remember the % though (video is at the sheepfold)

It's usually 25% of total travel for street, 22% for track.

ReaperAZ · 03-24-2006, 1:48 PM

SPY's biggest problem is that he's overpowering his front. Needs some new springs as he is a big boy. Anyone know the stock spring weight in the 954's?

abtech · 03-24-2006, 1:55 PM

Quote:

Originally Posted by ReaperAZ

SPY's biggest problem is that he's overpowering his front. Needs some new springs as he is a big boy. Anyone know the stock spring weight in the 954's?

.72 KG progressive if I remember correctly . . .

ReaperAZ · 03-24-2006, 1:56 PM

Quote:

Originally Posted by abtech

.72 KG progressive if I remember correctly . . .

Thanks abtech.

HondaGalToo · 03-24-2006, 2:02 PM

For the front on 929/954, Dan Kyle recommends 36-38mm street, 34-36mm track. For the rear, it's 28mm street, 25mm track. The front you'll never get with the stock springs.

HondaGalToo · 03-24-2006, 2:04 PM

Quote:

Originally Posted by abtech

It's usually 25% of total travel for street, 22% for track.

How do you determine total travel? Is that the length measured with the forks fully extended? (the first measurement taken for sag)

gt702 · 03-24-2006, 2:15 PM

Quote:

Originally Posted by HondaGalToo

How do you determine total travel? Is that the length measured with the forks fully extended? (the first measurement taken for sag)

Best bet is probably to check the service manual. You got the fully extended part, but getting the compressed length, without removing the springs might require a few large friends

clutchslip · 03-24-2006, 2:23 PM

Quote:

Originally Posted by gt702

Best bet is probably to check the service manual. You got the fully extended part, but getting the compressed length, without removing the springs might require a few large friends

I was writing this long explanation and thought, "too long". You got to the same place quicker. Add one thing. Full extension you need to PULL down on the front wheel. More use for those few large friends.

abtech · 03-24-2006, 2:24 PM

At KSS they say they use the manufacturers specs for suspension travel. Many trackside suspension people just use 4" to 4.5" front and 4.5" to 5" rear as a loose standard.

HRC NICK 11 · 03-25-2006, 12:15 PM

Setting sag was so much easier before top-out springs.

HRC NICK 11 · 03-25-2006, 12:17 PM

This site has a lot of info on the 600rr front suspension.

http://www.peterverdonedesigns.com/damping.htm

abtech · 03-25-2006, 2:30 PM

Quote:

Originally Posted by HRC NICK 11

Setting sag was so much easier before top-out springs.

That's one reason why a lot of racers are taking them out and using a conventional spring/spacer stack. The method described in your link are a good start if you're going to stay with the top out springs.