[wills]

I had no success with the search, so here's the question. I want to firm up the front a bit with some progressive springs. Is there anyone who is making springs for the 05 ST?

 

[Stlakid]

RaceTech makes good stuff. Ignore their website as for whatever reason THEY ARE TO LAZY TO UPDATE IT! It was out of date in 2003 when I bought my springs. They didn't even list a Sprint 955 let alone an RS! It is EXACTLY the same today!

Bottom line is the springs are really a CUSTOM fit upon installation so I have no doubt the springs listed for the 900 Sprint (same ones I bought, and was told by THEIR tech support as the correct model as well) will also work in your 1050. Just use their spring calculator for the correct part number and order a set for the 900 Sprint which has basically the same forks. I understand the newer 1050 models have much improved damping but they are still the same basic 43mm forks the sprint has always used. My only tip might be that IMHO Race Tech's calculator tends to select springs on the stiff side. Not badly, but just a bit, so if you prefer a more comfortable ride 'I' would select a spring one notch softer than they recommend. Don't get me wrong, mine are NOT stiff, but if you wanted to keep a plush ride they might be a bit stiff for your taste in that case.

You can (should) just contact them directly and have them give you the part number you need if you prefer.

Spring rate calculator
RaceTech parts (that should work for a 1050)
Contact RaceTech USA

PS. Just an FYI, All RaceTech springs are SINGLE rate springs. They don't agree with the use of progressive springs. They explain it on their website.

[ This message was edited by: Stlakid on 2006-11-16 18:45 ]

 

[wills]

Thanks for the info. I put a call into them, they are researching, when I put the bike in service I will remove a spring and get dimensions.

I measured fork it's 42.9 mm so we might be onto something here.

[ This message was edited by: wills on 2006-11-16 18:11 ]

 

[Stlakid]

NO NEED! I have my stock springs here. They measure 37mm O.D. and 415mm in length and they are a progressive wind. The RaceTech springs are part # FRSP 3732 which are listed as 36.7mm O.D. and 315mm in length. So you see they will be almost 4" shorter than the stock springs with a linear wind to them. You make up the difference in length with the spacers that YOU are going to cut upon installation. CUT THEM STRAIGHT! If you are careful a chop saw for woodworking will do a nice job just go EASY.

RaceTech Available Springs

 

[rodneybrown]

HyperPro makes continuously progressive fork springs for the Sprint ST both pre and post 05 models. I have them in my 02 and love them. HyperPro springs have won at Daytona so they can do the job. Not sure if they still do it, but you used to have 30 days to try them out and if you didn't like them, you could return them.

 

[Suncoast]

I'm just wondering if you know the stock measurements of your springs then is there some sort of crose reference for springs, I see that Progressive doesn't list Triumph Sprints but I'm wondering what other bikes would use the same springs, there are always listings on e-bay for progressive springs if I knew what other bike springs fit then you could get a deal on progressives possibly :???:

 

[amrehm]

Try Wilbers - http://wilbersusa.com/wilbers/index.htm

I have used Racetech in the past & I liked them. I have left several messages & e-mails lately & haven't been able to get a response from them. Wilbers is very friendly & eager to help & sent me a whole list of everything they have to offer me. I'm going to order spring shortly & a new rear shock next year.

Alan

 

[wills]

I am contacting all the suppliers you guys submitted and will let you know the results. Thanks for the imput.

 

[Yimm]

I just added a set of Race Techs to my '06 Sprint. It's a bit late for a ride tonight, but I can't wait to get out and try them out tomorrow. I can already tell they're way stiffer than the stockers. They were way too soft for my liking and dove like mad under heavy braking. I have tried progressives in the past and don't like them much.

It's a simple job. Took about 2 hours. I used a pipe cutter and it cut the spacers dead square. After cutting I deburred to make sure no swarf ends up in the oil.

They came right in where they should with about 15mm free sag, and 30mm static sag. Being on the large side at 215 I bought 1kg/mm which is what they recommended for the Sprint and my weight.

So we'll see in the morning.

Gold valves next, and maybe a set of Penskes?

 

[Stlakid]

They came right in where they should with about 15mm free sag, and 30mm static sag. Being on the large side at 215 I bought 1kg/mm which is what they recommended for the Sprint and my weight.

I feel better, I thought I was the only one who had to get the 1.0 springs! :-D

Gold valves next, and maybe a set of Penskes?

If you do get that set of Penskes, can I have the extra one?

 

[Yimm]

Sure. Why not. We're all friends here.

 

[DaveM]

Hi Stlakid,
No you are NOT the only one!

I havent done it yet, but the local suspension specialist here in Brissy (you might remember he wanted an arm & a leg to do mine), well anyway he told me I needed the 1.0 springs too! :hammer:

When the back end goes to lunch I intend to fit an Ohlins.

One day I will get the front springy bits attended to but for now it still manages to tear up tyres and hold a line ok it just gets more interesting when it's bumpy! :-D

Davem

 

[Yimm]

On 2006-11-17 22:52, Yimm wrote:
I just added a set of Race Techs to my '06 Sprint. It's a bit late for a ride tonight, but I can't wait to get out and try them out tomorrow. I can already tell they're way stiffer than the stockers. They were way too soft for my liking and dove like mad under heavy braking. I have tried progressives in the past and don't like them much.

It's a simple job. Took about 2 hours. I used a pipe cutter and it cut the spacers dead square. After cutting I deburred to make sure no swarf ends up in the oil.

They came right in where they should with about 15mm free sag, and 30mm static sag. Being on the large side at 215 I bought 1kg/mm which is what they recommended for the Sprint and my weight.

So we'll see in the morning.

Gold valves next, and maybe a set of Penskes?

Well, the race techs do the job very well. Much better low speed support and it no longer heads south under heavy braking. But the bike definitely needs a gold valve. It is still extremely harsh on high speed bumps, as it was with the original springs.

Generally, when you stiffen up the springing, the stock valving becomes more compliant at both high and low speed as the greater pressure from the springs moves the same oil faster. This did not happen on the high speed end of things, at least not noticably, in my case.

Overall, a very valuable upgrade. Front end is much more confidence inspiring now.

 

[rodneybrown]

DaveM,
Since you are on an 04 your situation is significantly different than the 05+ boys. They have cartridge forks and use a Gold Valve. Your's has a Gold Valve "EMULATOR" and requires pulling out the damping rod and drilling them. I know you don't do most of your own wrenching, but replacing the springs is much cheaper, easier and can show significant results WITHOUT the emulators. As I mentioned in a previous post, I use HyperPro springs (and have the RT emulators too all of which I installed myself). You can just pull the old springs, top the oil off because you will lose some and you want to add a bit too, then pop in the new springs. All of this can be done in less than an hour and it AIN'T rocket science. If you don't like it, you can put the stocks back in. You can also tweak it by adding emulators and/or changing fork.
Rod

 

[Yimm]

I would like to add that the emulators work very well on damper rod forks. I have installed several sets and they make a significant difference, especially if you push your bike hard.

The downside is they exascerbate any inadequacies in the rear. So adding emulators will elevate your interest in a good shock dramatically. This is a situation for which one needs be financially prepared, so to speak.

 

[Guest]

RodneyBrown and others

Looking for a cure for the brake dive and wallowing on my '02 Sprint. Race Tech comes highly recommended. I am 6'4" 235 pounds. The bike isnt as stable or composed as I think it should be. Would you just get the springs or the emulators too? Thanks for any input. I hear that when I do the front it will make me want to do the rear next as it makes that the weak spot!

 

[DaveM]

On 2006-11-19 09:45, rodneybrown wrote:
DaveM,
Since you are on an 04 your situation is significantly different than the 05+ boys. They have cartridge forks and use a Gold Valve. Your's has a Gold Valve "EMULATOR" and requires pulling out the damping rod and drilling them. I know you don't do most of your own wrenching, but replacing the springs is much cheaper, easier and can show significant results WITHOUT the emulators. As I mentioned in a previous post, I use HyperPro springs (and have the RT emulators too all of which I installed myself). You can just pull the old springs, top the oil off because you will lose some and you want to add a bit too, then pop in the new springs. All of this can be done in less than an hour and it AIN'T rocket science. If you don't like it, you can put the stocks back in. You can also tweak it by adding emulators and/or changing fork.
Rod

Thanks Rodney ole trout

Davem

 

[Yimm]

On 2006-11-20 22:05, gamecock wrote:
RodneyBrown and others

Looking for a cure for the brake dive and wallowing on my '02 Sprint. Race Tech comes highly recommended. I am 6'4" 235 pounds. The bike isnt as stable or composed as I think it should be. Would you just get the springs or the emulators too? Thanks for any input. I hear that when I do the front it will make me want to do the rear next as it makes that the weak spot!

The race tech 1kg/mm may not be enough for your size. But you can try them and see what you think. They may be fine. Everyone is different.

If they are inadequate, you can make them stiffer still by shortening them. Shorter springs are stiffer than longer springs of the same wire and pitch. Just cut off a coil or two, heat the top coil up red hot with an acetylene or mapp gas torch, and squeeze the top coil flat with a pair of pliers. Then grind the top off nice and square with a grinder. It's important that both springs are within a couple of mm in length when you're done. You will have to cut longer spacers. PVC Schedule 40 does the trick nicely. Use the same preload, 15mm, with pre-load adjusters turned all the way out.

I would do the springs first, get them just the way you like, then add the cartridge emulators. It's a bit more work but if there are issues, you won't be wondering which change is causing the problem.

It's a bit of work, but very satisfying when you see how good your new setup works. This will work just as well with progressives as with single rate springs.

 

[rodneybrown]

I'm somewhere between 6'2" and 6'3" and have weighed as much as 245lbs riding my current setup. Just a few things to keep in mind, all bikes have dive, it's how fast and how far they dive. I know that is stating the obvious but you can't dial it all out and you wouldn't want to if you could. There are lots of things you can do to adjust it. Change oil weight. Change oil level. Stiffer springs. Emulators will NOT eliminate dive, they just slow the rate the springs compress. To say that another way, you get the same amount of fork travel but it doesn't feel as bad because you don't get that quick falling feeling. It's the springs that really what determine most of the real suspension items. The damper rod or emulator just control how the impact or rebound affects the springs. What Yimm said is factual but you would have to do that with a straight rate spring which the stock spring is not. I would also go back to the HyperPro spring. It will NOT bottom or bind like a straight rate spring can. When you cut turns off that spring you are shortening it's max travel at the same time. To repeat myself, you have lots of options. Add more oil. Stock is 145 mm and RT recommends 125mm, that almost an inch less spongy air to compress. That could cut down on dive. Put 15wt oil, it will slow things down, but maybe give hydro lock in damper rod as well. Lots of pro's and con's. Bottom line is, pick something and try it. I'd say springs first, then oil and level variations, then emulators, more oil and level variations, then shop for a new bike if the stuff doesn't work. :-D

 

[wills]

Here are a couple of suppliers for 05 fork springs:

http://www.hyperprousa.com/catalog.php?cat=Springs&make=Triumph&model=TRIUMPH%20SPRINT%20ST%201050%2005%3E&model_name=TRIUMPH%20SPRINT%20ST%201050%2005%3E

An e-mail from Wilbers:
Hi Spence,

thank you for your interest in our products.
Yes, we can supply you with a set of progressive springs for the USD fork of
the Sprint ST @ $ 123.00
S&H is $ 10.00
Please call us with your order.
Regards
Klaus Huenecke


I have been busy replacing exhaust on my GTO, so next is the bike.