centred wheels.

[Ed74mnd]

hey guys,

im looking for a way to work out if my wheels (in particular rear wheel) are centred relative to the frame.
I was thinking of plumb bobbing the rim edges on front and back wheels, swingarm pivots, axle and marking the points with chalk on the floor then measuring diagonals etc.

At the moment I have got the wheel positioned where I think it is centred based on distance from shocks.. however this all means nothing if my frame is in a bit of a twist.

I am also not sure if the wheel should be centred in this swingarm (GSX1100 1982) etc.

any other ideas?

I reckon from factory everything would be a few mm out anyway?

Cheers

Ed

On an old GSX line-of-sight would be as good as they came from the factory.

Perhaps try running you're chalk marks along the lower frame rail line and down past the rear wheel, that should give you close enough. Don't forget to check the chain run though, if it's out of line you will destroy chains/sprockets and the output shaft bearings

[Ed74mnd]

ok cool Chalk, will try.

i have eyeballed the wheel and am happy.
My front sprocket despite using an AFAM offset sprocket needs to come out a further 3-4mm. nothing a hardware washer cannot fix.

Stupidly I forgot the stock sprocket was already 5mm back spaced, thus the new one should have been 20mm backspaced.. I currently have 17mm.

All fun and games.

Cheers

Ed

[ozR1127]

[8D]have you ever string lined a bike?, this will check if it's tracking straight, contac me an i will explain the method

a laser level is most handy for this task. you can pick up a cheapy for about $80 or ask your mates in the building industry if they have 1.When i bought my bike Mad and i used fishing line to string between wheels/axles.
you can usually just tell by riding the bike if sumthings not straight,it will lean easy to one side and hard to the other.

[Ed74mnd]

ahh fishing line... never thought of that.. thanks Davo,
i may be able to borrow a laser off a mate too.

have sent u a PM ozR.

Cheers

Ed

[Stocky]

The laser is the go for lining up sprockets.

I borrowed one, wheel aligned my bike and then found the sprockets were out by about 4mm.

Once I fixed it the chain noise reduced heaps.

[Ed74mnd]

sweet will def look into borrowing one, sounds like it makes life real easy.

Cheers

Ed

[KRASH]

http://www.streetfighters.com.au/forum/upload/5399981439614.jpg
This is like the one Stocky was talking about...
It worked brilliant...[^]

[Ed74mnd]

oh nice..

Reckon my local bunnings would have one of these?

Cheers

Ed

[Ed74mnd]

worked out that's a "profi C.A.T"

obviously not from scummings...

Ed