Fork Swap

Several forks can be used with minor efforts to replace the OEM Paioli forks Original fork length is approximately 82cm

Yamaha R6 2004 fork swap

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Parts needed

R6 Oem Parts

The complete R6 front-end including

  • Complete fork
  • Front wheel
  • Front fender
  • Brake caliper
  • Wheel axle and shims
  • R6 disc ID 132mm

Modifications and machining

  • Machine and weld fork stop
  • Stem shim ID 30mm height 5mm OD 40mm
  • Machine lock post down 5mm

Rear Shock

YSS Nitron TFX 600FZR and CBR F3 shock are usable Stock bilstein spring 9 3/4 coils 12.5mm wire 21cm length Penske spring 6 1/2 coils Wire 12.5mm 15.4 length ID 57mm

Performance

Carburetors Get Raptor carbs with OEM Raptor intake. Straight forward $300

FACT: The Dyno does not lie. At sustained high revs the stock Skorpion carbs cannot supply enough fuel to the bigger carb. I hesitate to use the word sustained because the bike runs lean off the chart in just seconds. Most of the people on this forum understand that running this lean leads to burnt valves and burnt valves don't form a proper seal in the valve seats and now you are losing precious horse power. I'm no superstar mechanic but I get the concept.

OPINION: For street use only, stock carbs are okay. The only mods to my Skorpion Sport Cup are the removal of that micro screen filter, a clip moved on one of the needles and an in line filter. For street use and the occasional track day. I feel you have to make the fuel delivery mod that I have pictured. The extra transfer tube has proven itself on three different Skorpions on the long front straight at P.I.R. I'm not even sure this is an original idea. I think if you ask some of the guys who used to run the Yamaha SRX600 at the track they'd say that they have done the same type of mod. For the track, you know the answer. Flatslides are great for creating top speed when jetted correctly. Having said that I'll admit that I don't use them. I like my Keihin 33mm smooth bores. They are beautifully made. They are a big jump in performance over and stock carb, modified or not. And I wouldn't be surprised if they work better than Flatslides on a tighter track with shorter straightaways. I have no experience on that type of course.

BANG FOR THE BUCK: If my Skorpion was going to do double duty as street bike and track day bike I'd go with the modified stock carb. I just can't justify the extra expense of an after market carb for track days. Even if you did go high dollar on your street bike and put Flatslides on it would they work very good at low revs? I don't think so.

PARTS FOR MOD: (1) 1/4 by 28 Tap (1) 7/32d rill bit for tap hole. Opinions vary, make your own call on bit size. (1) Drill bit for opening up the unused spigot on the carb bowl. I'm sorry I have no notes on the size I used. Make your own call. (1) Tube of two part epoxy suitable to exposure to race gas. (1) Napa Auto part #1410 brass elbow fitting. I hope they still have these listed under this number. (1) Short length of appropriately-sized fuel line. (2) Small hose clamps. In my experience this modification goes a lot smoother with beer, a good friend and the optional bike race playing on the DVD. Time required is directly related to beer consumption. Private message me if you prefer to have me do the work. You can send me your carbs for mod but I'd rather sell you a modified carb complete. That way you don't have to go without your bike while you wait for me.

Fairly straightforward: 1999-02 front r6 forks DRZ400 all balls tapered steering stem bearing kit

WHEELS

R6 2003 uses bearing 60/22, part # 93306-00420-00 22mm ID, 44mm ED, 12mm width

DR400 uses 08130-69047 wheel bearing NOS 20x37x9. Same on the SM Rear part 08133-60047 20mm ID, 42mm OD, 12mm Lower stem bearing BEARING (30X52X16) 09265-30014 Upper stem bearing BEARING (30X52X16) 09265-30014 2003 R6 upper stem bearing 93399-99955-00 Lower 93399-99932-00 Year 2000: 93399-99932-00 2005 R6: /93399-99955-00 Size upper - 30x55x17 Size lower - 30x55x17 MZ Steering bearing 25x52x15 Front wheels bearing 6004 20x42x12 https://www.ricambiweiss.com/en/verkleidungsteile/mz/mz-skorpion-sport-skorpion-replica/

WIRING Position light wire from right switch can tap anywhere into the gray wire that powers both dashboard and position light Gray wire from lock switch need to connect upstream from the dashboard and use the one way diode

Aprilia RS250 Mk1 and Mk2 fork swap

278332833_389393586366674_3030764473538126577_n The front end of both the Aprilia RS250 first gen (Mk1) and second gen (Mk2) can be installed on the MZ Skorpion frame. The only part needed are new steering head bearings dimensions: 30 x 52 x 16mm that equip several suzuki bikes including the Drz400. Both head and bottom bearings are the same, the Suzuki part ref. is 09265-30014

RS250 Mk1 Fork details

The original Mk1 Aprilia RS250 came fitted with a 40mm USD Marzocchi fork.

Oil Oil quantity is 420cc of 7.5w fork oil in the left leg (with spring). The right leg (with damper) has to be filled up to 6cm from the edge, fully compressed with cartridge fitted.

Spring 35mm OD x 255mm, length. 1.2kg/mm is OEM.

Oil seal: ref. 528053; 40 x 52 x 10/10.5

Dust Seal: ref. 533281; 40 x 52

Bushing: ref. 538032/B; 40mm guide - 40ID x 25 x 2

Paint codes

  • 190 dark black RAL 9005
  • 200 mint green RAL 6029
  • 220 traffic white RAL 9016
  • 240 signal yellow RAL 1003
  • 270 aquablue, pearly C5U
  • 280 brilliant black metallic A9V
  • 290 classic green pearly C6V
  • 350 bordeaux, pearly C3Y
  • 360 tornado red Y3D
  • 370 turquoise metallic B6T
  • 380 blue pearly LZ5M
  • 390 green classical C6U
  • 400 orange RAL 2008
  • A10 avant garde blue KI2NM6B
  • A20 cobre natural ICI ELT2B
  • A30 flintback metallic NH526M-4
  • A40 ferrari red 304
  • A50 light red mica ICI7KW6B
  • A60 Iceland metallic ICI8MT1B
  • B10 cup green/white p

Battery:

Yuasa. YB9L-A2

Consumables

Oil filter: 4X7-13440-90-00 Oil cover gasket: 93210-64297-00 Oil line o-ring: 93210-10197-00 Engine breather tube: 3TB-11166-00-00 MZ crankcase breather tube: 3433040000 Battery: 9014537000

Seal for shifter rod: 931021232100 Seal, oil line to engine: 932101019700

1989 fzr400 swingarm: 3FH-22110-00-00 1990 fzr400 swingarm: 3EN-22110-50-00