Fork question

[cougar694u]

According to RaceTech's website, stock spring rate of the busa's fork springs is .850 kg/mm, but the 05-06 GSXR1k are .950 kg/mm.

If the tubes are the same diameter, wouldn't it be a worthwhile upgrade to use 05/06 1k forks on the busa?

Granted, the valving's still stock, but you're rolling with a stiffer spring.

I looked on RaceTech's website and the part numbers for the springs are identical for busa vs 1k, but what about length, travel, and O.D.?

Anyone every done this?

I was looking into rebuilding my own forks with either .95 or 1 kg springs (street calls for .95 and racing calls for 1, so I'm torn), but I'm looking at around $500 before shipping. I figured I could pick up some 05/06 forks cheaper and roll on them until I can afford to rebuild my busa forks.

Discuss...

 

[Don Hardcastle]

Why not just take the springs out of the 1k forks and put 'em in your Busa tubes?

Don

 

[cougar694u]

So you don't have to disassemble the two sets of forks. It would be a direct swap.

 

[GPW]

Sounds like a smart idea as long as eveything else mounts up, fender, brake calipers and such. Might find the dampening in the 1K shocks to be a tad better...towards the aggressive side.

 

[Charlesbusa]

It'd be cool if you could keep the GSXR's radial brakes also.

The problem might be with the triple tree....

 

[gat0r]

i have heard & seen articles that you need a spacer to fit 1k forks into busa trees
something like 1mm smaller OD for 1k's

 

[GoldenChild]

(cougar694u @ May 07 2007,11:57) According to RaceTech's website, stock spring rate of the busa's fork springs is .850 kg/mm, but the 05-06 GSXR1k are .950 kg/mm.

If the tubes are the same diameter, wouldn't it be a worthwhile upgrade to use 05/06 1k forks on the busa?

Granted, the valving's still stock, but you're rolling with a stiffer spring.

I looked on RaceTech's website and the part numbers for the springs are identical for busa vs 1k, but what about length, travel, and O.D.?

Anyone every done this?

I was looking into rebuilding my own forks with either .95 or 1 kg springs (street calls for .95 and racing calls for 1, so I'm torn), but I'm looking at around $500 before shipping.  I figured I could pick up some 05/06 forks cheaper and roll on them until I can afford to rebuild my busa forks.

Discuss...

They can be done for less than that lmk and i'll get ya hooke up...

 

[cougar694u]

The thing is I'm funny about servicing my bike. Only I, or my brother, service my bike, car, computer, etc.

I'll order parts and DIY, I have the skills. How much you talkin about, and with what?

 

[Cykill]

(GoldenChild @ May 07 2007,23:13)

(cougar694u @ May 07 2007,11:57) According to RaceTech's website, stock spring rate of the busa's fork springs is .850 kg/mm, but the 05-06 GSXR1k are .950 kg/mm.

If the tubes are the same diameter, wouldn't it be a worthwhile upgrade to use 05/06 1k forks on the busa?

Granted, the valving's still stock, but you're rolling with a stiffer spring.

I looked on RaceTech's website and the part numbers for the springs are identical for busa vs 1k, but what about length, travel, and O.D.?

Anyone every done this?

I was looking into rebuilding my own forks with either .95 or 1 kg springs (street calls for .95 and racing calls for 1, so I'm torn), but I'm looking at around $500 before shipping.  I figured I could pick up some 05/06 forks cheaper and roll on them until I can afford to rebuild my busa forks.

Discuss...

They can be done for less than that lmk and i'll get ya hooke up...

I was thinking the same. i'm about to replace the seals in my forks, and have been considering re-springing them at the same time. That price just seems high to me...

Future group buy?

 

[cougar694u]

(Cykill @ May 08 2007,12:13) I was thinking the same. i'm about to replace the seals in my forks, and have been considering re-springing them at the same time. That price just seems high to me...

Future group buy?

FRSP S3825100, which is a 1 kg spring = $109.99 - Good price, IMO.
Gold Valve FMGV S2530 = $169.99 - A little high, but still reasonable
US1=3.5-5w fork oil ( 2 qt required) = 59.98 - A little high, I might be able to score some locally cheaper.
Fork seals: FKOS 43 P = $18.38 - cheap enough to only make a marginal difference
Dust Seals: FKDS 43 P = $21.98 - ditto

Total is $380.32, plus shipping. The price I estimated was with purchase of tools, but CAT3 had a good write up on how to build your own, thus saving around $150

I may just buy parts in increments as I can afford them, but the $380 seems very reasonable to me.

The point of the thread was something like a reasonable alternative to rebuilding stock forks. Sometimes you can roach up on a set of forks for a couple hundred bucks, saving almost 2 bills. Then you could take yours apart and rebuild and not be out a bike, understand?

 

[species0113]

just play with your fork oil height and adjustments. you'd be supprised what you can accomplish with tuning.

 

[cougar694u]

I had my suspension tuned by a certified suspension shop while at a track day, and the springs are way too weak. We went with full pre-load and it's not enough. Sure, I could fake it by adding heavier fork oil and dampening, but who likes a faker?