Swing Arm Reinforcement; Front And Alignment-Steel Ski; Steel Ski Modification - BOMBARDIER 1996 Ski-doo MX Z440 Handbook

Section 07 COMPETITION PREPARATION
SWING ARM REINFORCEMENT - When high speed lake racing using full race carbides you may
want to add additional strength to the production swingarms. Strap the swingarms as per attached
sketch. Note 4130 chrome moly is used in the 1994/96 MX Z swingarm.
For extra strength you may want to weld a solid washer over each of the radius rod attachment
holes located on the front swingarm and strap the swing arm to the ski spindle tube.
3
, A01F24S
1. Reinforce weld on swingarmto spindle tube to radius rod bracket
2. Strap here
3. Add 1/8" thick washers over holes
FRONT END ALIGNMENT-STEEL SKI — The OEM steel skis are all tapered from front to back
and will therefore give you an incorrect measurement when checking alignment using the outside
edges as reference points. Measure your skis to determine the variance and compensate accordingly.
Of course any carbide runner must be checked from the underside position across the sharpened
edges for true alignment first.
STEEL SKI MODIFICATION — In some racing applications you may want to increase the
strength of the OEM ski to withstand frontal impacts. Weld steel rod (1/4 inch) to the topside of
both skis as per attached sketch. This should be done to the left and right side of both skis and start
inches behind the ski spindle and go forward and into front upward curve. Top section of ski
4
should be welded to bottom section. This is especially important for ice racing.
A06G17S
1. Weld 1" every 1"
2. 1/4"@ reinforcing rod
07-14
2