OzVMX Forum

Clubroom => Tech Talk => Topic started by: jimg1au on December 18, 2010, 10:49:45 am

Title: how do you check your steering dead angle with only a bare frame
Post by: jimg1au on December 18, 2010, 10:49:45 am

hi
after much dissucion i have come to the conclusion that my flact track frame is a redline or a copy of a redline.now redline made 2 types of frame mx and flattrack
mx frame has 29 deg steering angle
flattrack frame has 26 deg
i would like to know how you tell the difference
thanks
jim

Title: Re: how do you check your steering dead angle with only a bare frame
Post by: vandy010 on December 18, 2010, 12:46:04 pm

for the sake of accuracy Jim,
i'd be wanting to be a little patient and do a mock up with suspension/wheels etc as this'll give the true reading of steering angle.
patience grasshopper ;)

Title: Re: how do you check your steering dead angle with only a bare frame
Post by: jimg1au on December 18, 2010, 12:50:38 pm

thats what i thought.
firkos mate yamamaico might be able to help as he changed the head angle on his it/yz dirttracker
jim

Title: Re: how do you check your steering dead angle with only a bare frame
Post by: mick25 on December 27, 2010, 06:52:16 pm

I have done two steering head changes 30 deg to 27 on a couple of bikes for better cornering speed.
This is the way i worked it out ,on my own throughts may be theres a better way..
To check your frame angle
I just get the bike complete wheels forks shocks and level it out on the ground useing a long straight edge and sprit level
Then i get a builders sliding bevel and put it agaist the forks you will have to put a sprit level on top of the bevel and level the bevel,
this will give you your deg angle........ then drop the bevel in a builders drop  saw and rotate the blade to suit the bevel angle, the saw has degs numbers on it, 
this will give you a deg angle within two degs on my sums,to your frame.
Im in the building trade so may sound funny to some but worked for me..................................

Title: Re: how do you check your steering dead angle with only a bare frame
Post by: David Lahey on December 27, 2010, 08:23:06 pm

Thats a good technique if you:
Have triple clamps with no angular offset to the steering head or
Want to change the steering angle by X degrees

Title: Re: how do you check your steering dead angle with only a bare frame
Post by: PEZBerq on December 30, 2010, 09:13:19 pm

Surely you can measure the steering head direct also - instead of on the forks  ??? ??? May need a short spacer with parallel sides to get away from the obstruction of triple clamps,welds, bearing housings etc when measuring using a builders sliding bevel and spirit level. Probably a 2 or 3 person job ;D.