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Old 07-28-2009, 09:00 AM   #1
Chubby Racer
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bargain basement suspension upgrades

If you wanted to spend as little money as is possible while still making some kind of positive impact on a bike for use in trackdays/racing, what would you do?

I'm thinking: correct rate springs for rider weight + one "step" heavier fork oil. Looks like this would cost ~$400.


What do ya'll think?
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Old 07-28-2009, 09:02 AM   #2
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Old 07-28-2009, 09:12 AM   #3
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I don't recommend changing the oil weight on a GSXR. It's not like to old damping rod forks so it works differently.

As far as springs, it would depend on how much you weigh and what springs are in it now.

Basic suspension theory is that damping rates of the compression and rebound valving are dictated by the rate fo the spring among other things.
If you change the spring without changing the damping rates to suit it, you can cause issues.

For example; if your forks are set up to damp a stiff spring, and you install a much lighter one, your compression will probably be a bit too light and your rebound too heavy. If you go the other way, the inverse is true.

Give me a call and I can better advise you on some inexpensive means of doing your suspension once I know what you weigh and how you ride.
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Old 07-28-2009, 09:13 AM   #4
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Quote:
Originally Posted by po-po 5.0 View Post
If you wanted to spend as little money as is possible while still making some kind of positive impact on a bike for use in trackdays/racing, what would you do?

I'm thinking: correct rate springs for rider weight + one "step" heavier fork oil. Looks like this would cost ~$400.


What do ya'll think?
Hey Po-Po, I saw you at the motogp event but got caught up in the races and didn't say hello. Have you had a chance to figure out how much suspension travel you are using on the front end by putting a tire wrap around the fork tube? I'm curious if you are already bottoming it out.

How much do you weigh?

-Curt
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Old 07-28-2009, 09:14 AM   #5
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Quote:
Originally Posted by Patrick View Post
I don't recommend changing the oil weight on a GSXR. It's not like to old damping rod forks so it works differently.

As far as springs, it would depend on how much you weigh and what springs are in it now.

Basic suspension theory is that damping rates of the compression and rebound valving are dictated by the rate fo the spring among other things.
If you change the spring without changing the damping rates to suit it, you can cause issues.

For example; if your forks are set up to damp a stiff spring, and you install a much lighter one, your compression will probably be a bit too light and your rebound too heavy. If you go the other way, the inverse is true.

Give me a call and I can better advise you on some inexpensive means of doing your suspension once I know what you weigh and how you ride.
Hey Patrick, could he make use of my stock '08 gsxr springs or the first set of ohlins springs I bought and then had to replace?

-Curt
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Old 07-28-2009, 09:19 AM   #6
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Quote:
Originally Posted by maxgs View Post
Hey Po-Po, I saw you at the motogp event but got caught up in the races and didn't say hello. Have you had a chance to figure out how much suspension travel you are using on the front end by putting a tire wrap around the fork tube? I'm curious if you are already bottoming it out.

How much do you weigh?

-Curt

I'm a pleasantly plump 230 at the moment, and according to racetech.com my bike is setup for a 130-160 lb rider (depending on if you look at the fork or shock rate). I haven't done the zip-tie trick yet, but there are a couple of turns at TWS (Texas World Speedway) where I feel like I'm completely sacking the suspension (besides the obvious turn 7).
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Old 07-28-2009, 09:38 AM   #7
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If I decide to do the zip-tie trick at TWS (Texas World Speedway) at my next trackday.....do I need to p4ssyfoot through turn 7 to get an "accurate" measurement?
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Old 07-28-2009, 09:39 AM   #8
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I'd ride at your normal pace. Have you had Patrick already take a look at get what he could out of the currently suspension?

-Curt
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Old 07-28-2009, 09:50 AM   #9
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Quote:
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I'd ride at your normal pace. Have you had Patrick already take a look at get what he could out of the currently suspension?

-Curt

I had the the guy from R&T cycles thats normally at LSTD days do what he could with it. Even he said "this is as close as I can get it."
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Old 07-28-2009, 11:45 AM   #10
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I think that was at the Elite day at H2r maybe?
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Old 07-28-2009, 11:46 AM   #11
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I think that was at the Elite day at H2r maybe?
Never rode at harris hill. He comes to TWS (Texas World Speedway) for LSTD on a fairly regular basis.
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Old 07-28-2009, 11:52 AM   #12
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Old 07-28-2009, 12:00 PM   #13
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Old 07-28-2009, 12:02 PM   #14
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Popo means Roger with OnRoad OffRoad
yea, him.
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Old 07-28-2009, 03:00 PM   #15
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well ive had gsxr worked by him(Roger) and it worked great.
this last time we went the guy that works with him did something a little odd on my friends bike.
the bike he was on might of being a little too high on the front (04 gsxr600).
when i walked up to it he was un- the preload off out of the forks.
he said the bike was too high on the front so that was "the" way to fix it.
was this right,i dont know.the bike has an adj penskey he could have raised or even drop the forks from tripple,right.?
if OROR was gonna work on my bike id make sure it was Roger.....just my $.02
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