Rear isolastics

A

Anonymous

Guest

• Aug 5, 2004

• #1

Could anyone tell me the correct lenght of the rear tube that houses
the isolastic mountings, as the one i have seems to have 35mm
to the engine plate one side and 40mm on the other.this would offset the
swingarm and engine plates by 5mm from centre of frame , or is this correct.

Thanks Roy

 

ILLF8ED

Joined

Dec 30, 2003

Messages

3,689

• Aug 6, 2004

• #2

rear isolatic position

Hi Roy,

I can't understand your reference point origin, but I just measured my '72 roughly from the outside of the alloy "Z" plate to the engine plate. It's about 4 1/8" on the timing side (right side) and 3 3/4" on the drive side (left side). Looks like Norton offset the whole thing to the left assuming the frame wasn't made offset.

 

A

Anonymous

Guest

• Aug 6, 2004

• #3

Isolastics

With the swinging-arm and engine plates removed from the frame (in one piece) We now have access to the isolastic mounting . The tube that houses this , is the one i need to know the lenght of , with the isolastics
removed and end plates removed . then measure from the end of the tube to the engine plate (both sides) , rest as in first posting.

Thanks david , Roy.

 

ILLF8ED

Joined

Dec 30, 2003

Messages

3,689

• Aug 6, 2004

• #4

rear isolastic

I can't help you with this measurement as my Commando is assembled and running. However from the measurement I posted it appears normal that the left side is shorter than the right for the dimension you have in question. The measurement I did would be a function of tube end to engine plate.

 

ILLF8ED

Joined

Dec 30, 2003

Messages

3,689

• Aug 6, 2004

• #5

rear isolastic

I can't help you with this measurement as my Commando is assembled and running. However from the measurement I posted it appears normal that the left side is shorter than the right for the dimension you have in question. The measurement I did would be a function of tube end to engine plate.

 

A

Anonymous

Guest

• Aug 11, 2004

• #6

Roy,

I can confirm - that on my collection of 1970 Commando bits - that the tubes extend 38mm (right side) and 33mm from tube to the outside of the cradle.

I hope that lets you rest easy.

Phil