Quote from: intergalactic on June 05, 2009, 07:11:45 PM
doesn't dgyver have a RGV swingarm for sale? Shipping to Israel is probably $3. 

What's the RGV swingarm bring to the table over the stock unit?

Quote from: Kurlon on June 05, 2009, 08:31:05 PM

Quote from: intergalactic on June 05, 2009, 07:11:45 PM
doesn't dgyver have a RGV swingarm for sale? Shipping to Israel is probably $3. 

What's the RGV swingarm bring to the table over the stock unit?

The most important is the coolness factor. 

Side benefits include being lighter & stiffer. Accepts wider tires, depending on wheel used. The VJ-23 I have has better chain adjusters, like a GSXR.

dual front discs, inverted forks
Bike is lighter
I think some adjustments. The website I am reading off of has some confusing language. "5-way adjustable"
what it SHOULD mean is that it does preload, hi/lo speed bound/rebound. But I think it really means is that its got 5 positions that adjusts bound/rebound together. Or it adjusts ride height. I'm not sure.
spring rate is probably higher, but should be set up for the rider anyways.

The bike is about 100 lbs lighter. What I know about suspension which is pretty much nothing in the world of motorcycles, I'd say the bike is going to be under damped.

import a CBR250RR and call it a day... more HP higher redline 250CC engine and a better platform, or a EX500 would be fine but meh... 19000 rpm 250cc 4 cylinder is sexy...

Seems like a lot of overkill. Save some money, plus when you crash, (and you will) your parts wont be so hard to replace.
I raced mine for 4 years, and only had:
> stock forks, with progressive springs and a preload spacer (1.25 inches)
My race partner had the gs500 with 1989 GSXR 750 ( non-inverted) forks and wheel it had dual disks.
> Airtech sold some cheap clip on bars, that I used.
> Katana Rear shock
> 36mm GSXR carbs
> gsxr shift linkage and I moved my rearsets back and up with a spacer at first, then I cut out my own rearsets. (for clearance, a must)
> V&H supesport pipe ( for ground clearance this was a must)
> eventually went with the 4.5in gsxr rr wheel ( upgrade is on pablos gs500 page, it may be here somewhere, too)
> degreed the cams ( can't remember the numbers)
One of our gs guys weighed the inverted, compared to the stock front end, and found the inverted heavier, and his lap times were no better.

Getting crazy:
I added a an airtech upper from a 91 gsxr
I removed the flywheel, counterbalancer, and starter for less internal rotational mass/drag. The crank oil journals that fed these items had to be soldered shut.

This bike was as fast as the unmodified ex's, but not the modified ones. and it handled WAY better.

I learned to ride better. Still have the stock pipe and pegs on my race bike, though I admit I'd do a little better with aftermarket parts.

Quote from: omrimon on June 19, 2008, 12:42:03 PM
I will be racing in a class where all suspension mods are permitted, but all engine and intake system mods are forbidden.

Mufflers can be changed but stock exhaust system has to be retained.

Full race fairing is required.

The calls is dubbed GP500, where all bike up to 500cc are permitted. So far, five out of six competitors are using GS500's, some stock, some modified. The other guy is using a heavily modified Supermono DRZ400 .
I was planning on racing my Hyosung GT250R but got into an accident on the highway and decided to ditch it for a GS.

Some pics:



03 ZX6R front end, RGV swing arm and wheel, GSXR750 race fairings.

I don't understand this.
hundreds of dollars on useless stuff, ( an upper fairing with no windscreen that offers nothing to tuck behind, it is basically weight, and drag, for a bike that tops out at about 115mph at best)
inverted forks, and a swing arm that is no more beneficial then stock.  $$$
plus if you  wreck, finding parts to replace on short notice.... is, well, tough
Yet, there is a stock pipe( compromised clearance, restricted exhaust flow, weight) and stock pegs( restricted clearence, plus small amount of weight)
plus the passanger pegs are still on....

i think if you must go GS500 get a old one before the f model, can you rebuild the engine to stock specs? can you put the new carbs on? how much of the frame can be removed for weight? I wouldn't have anything on the bike that wasn't totally necessary, hell i would grind down on the stock exhaust to take as much of that off as i could afford, chop the seat down and remove as much plastic and metal as you can light weight battery is a must, can you do gears? a 14 or a 15T would help a lot, lightest chain you can find, if you cant change the gears but can change the tires try to get a 16 inch wheel for the back at least to bump up the gear ratio, lightest rotors you can find and then start working out with cardio instead of strength so you loose weight and not gain muscle... but the biggest thing is ride better than the dude with no windshield on his fairing...

Nothing like bringing up a 2 year old thread...

hahaaa from the depths!

Quote from: ratz on June 16, 2011, 12:44:32 PM
I don't understand this.
hundreds of dollars on useless stuff, ( an upper fairing with no windscreen that offers nothing to tuck behind, it is basically weight, and drag, for a bike that tops out at about 115mph at best)
inverted forks, and a swing arm that is no more beneficial then stock.  $$$
plus if you  wreck, finding parts to replace on short notice.... is, well, tough
Yet, there is a stock pipe( compromised clearance, restricted exhaust flow, weight) and stock pegs( restricted clearence, plus small amount of weight)
plus the passanger pegs are still on....

Stock swing-arm is heavy as hell. The RGV conversion drops a huge amount of un-sprung weight, and comes with a 4.5 inch rear tire (also lighter than stock, for less rotational inertia - faster turn in, more HP.) Swingarm *is* a lot of money to throw at the GS - I have one, but in retrospect, I wouldn't recommend the project.

The inverted forks are a huge upgrade over stock - cartages provide much better damping characteristics than emulators, never-mind compared to the stock damping rods. Also, much stiffer than stock, front wheel is much lighter, brakes are much better, and wider range of tires available. IMO, it's one of the best upgrades for a race bike.

Forks and rear swingarm tend to survive a wreak fairly well, so no real worries about crash replacement.

Stock exhaust and pegs aren't as much of a limiting factor as you think, especially since the RGV swing-arm and 160 profile rear tire probably lifted the rear end, improving turn-in and cornering clearance somewhat. FWIW, while I used to drag pegs everywhere, improvements in my body position have increased my pace, and significantly reduced the incidence of dragging. I'm running sub 2:00 laps around sears (A pace for a 600 trackday rider) and still haven't found the limits of cornering clearance.

Exercise caution if critiquing those that do.

o god i didnt know it was so old... 

Quote from: dgyver on June 16, 2011, 01:04:39 PM
Nothing like bringing up a 2 year old thread...

I agree.

Are you back on the bikes.I been plugging away at getting mine in tune.