Full Suspension Mountain Bike Model (Specialized)

 

Specialized Demo 8 Model 1:9 Scale:  

 

Boost Me

This is a 1.9 scale mountain bike model based off a Specialized Demo 8 with rotating wheels, crank and pedals with pivoting frame and with spring loaded front and rear suspension.  

Feedback greatly appreciated! 

Pre-assembly: 

Some parts may need sanding/filing before assembly to ensure a perfect fit. 

**(Make sure to clear all supports from around pivoting joints of frame and rear shock before attempting to free off pivoting joints)** 

Tools needed:  

• Drill bit. (2mm, 4mm, 5mm & 6mm)  
• Glue. 
• Rasp/small file or sandpaper. 
• Springs:  

Fork spring: (Outer diameter 4mm, length 40-50mm)  

Rear shock spring: (Outer diameter 5mm, length 20mm) 

 

**(Drill bits to be used only by hand or pliers to prevent damage to parts)** 

2mm drill bit used for pedals, 4mm drill bit used for wheel hubs (if needed), 5mm drill bit used for fork crown lower and upper, 6mm drill bit used for bottom bracket/rear frame.  

 

Assembly guide: 

Step 1 (Wheel assembly): 

Place the alignment blocks (2 white pieces) into the correct cut outs on one half of the wheel.  

Apply glue all round and then place the second half of the wheel onto the first. (don't forget to align the tread pattern of the wheels)  

(As shown below) 

(Repeat step one for other wheel) 

Step 2 (Cassette and Rotor assembly): 

2.1: Slide cassette onto the right side of the rear hub. 

(As shown below) 

2.2: Next slide the rotor on the left side of the hub. 

(Repeat step 2.2 for other wheel) 

(As shown below)

Step 3 (Fork assembly): 

3.1: Slide the fork stanchions into the fork lower body from the bottom. 

(As shown below) 

3.2: Next slide in the spring. (outer diameter 4mm, length 40-50mm) 

(As shown below) 

3.3: Then push in the caps at the bottom. (glue in place if needed) 

(As shown below) 

3.4:  Next push the stanchions through the fork crown. (lower)  

(As shown below) 

3.5: Slide head tube (frame) onto centre of fork crown lower and place upper fork crown/stem over stanchions and fork crown lower. (glue upper and lower crown to stanchions once in place to prevent sliding on stanchions) 

(As shown below) 

Step 4 (Handlebar, Brakes and Grips assembly):  

4.1: Slide the handlebar through the stem/crown top until centred. 

(As shown below) 

4.2: Next slide on brakes followed by grips. 

(As shown below) 

Step 5 (Seat assembly) 

Glue the 2 halves of the seat together and place into frame. 

(As shown below) 

Step 6: (Crank, Crank arm and Pedal assembly) 

(Use 6mm drill bit by hand or pliers if needed to clear the holes on the frame and subframe) 

 

6.1: Slide the crank through the frame and subframe ensuring both pieces are attached and secured in place on the other side with the crank cap. 

(As shown below) 

(Use a 2mm drill bit by hand to open holes on pedals and use rasp/file or sandpaper to file down any support material on pedal pins of crank arms to ensure pedals move freely) 

6.2: Grab the crank arms and attach them on both sides of the crank via the square holes.  

(As shown below)

6.3: Slide pedals onto pedal pins. (Apply small amount of heat to end of pedal pins and flatten slightly to ensure pedals do not slide off pins. Be sure not to over-press the end of the pedal pins to prevent pedals sticking to pins/melting together) 

(As shown below) 

Step 7: (Rear Shock assembly) 

(Use 2mm drill bit to clear rear shock hole and use rasp/file or sandpaper to remove any existing support on rear shock link) 

Place the rear shock spring: (Outer diameter 5mm, length 20mm) onto the rear shock and secure in place with rear shock link. 

(As shown below) 

Step 8: (Rear Wheel to Frame assembly) 

(Use 4mm drill bit if needed to clear hubs on wheel) 

Centre rear wheel and derailleur with rear of frame and secure in place with rear axle.  

(As shown below) 

Step 9: (Front Wheel to Frame assembly) 

(Use 4mm drill bit if needed to clear hubs on wheel) 

Centre front wheel with fork lower and attach in place with front axle.  

(As shown below) 

Enjoy your 1.9 scale Demo 8!