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Can't get the front forks straight

sam000lee

sam000lee

Forum Mentor
I'm building up my parts GS450. It had been in what was described as a `minor crash' where the mechanic, after changing the PO's tires, took the bike out for a spin around the block (???), and dumped it to avoid hitting a truck.

One of the front forks was bent so I bought some ebay ones but can't seem to get the front wheel to be perpendicular to the handlebars.

Here's some pictures, sorry for the messy garage I have the bike pushed into the junk area. The front of the front wheel is bending towards slightly towards the left of the bike. The fender isn't on in the pictures but putting it on I can get it to be a little straighter.

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Likely causes?
I don't really have anything invested in this yet so would would rather deal with a possible buggered steering tube/frame before moving on.
 
There will be allot of people that know more about this im sure... but did you try loosening the tree and seeing if it straightens out? Also is there any chance the front axle is bent?
 
I just saw a video recently where some guy that posts on you tube from across the pond, search Delboy's Garage. He did a process to straighten the front end by loosening the axle pinch bolts followed by loosening the lower triple in order to bring things into alignment.

Hope this helps you. Just go to youtube and search Delboy's Garage.
 
I found it by searching Delboy's Garage front wheel alignment.
 
Found it, thanks for the video link Larry.
It's very possible that I didn't loosen the front axle/axle caps when I was trying to set them straight so I'll give that a go this weekend when I get a chance.
I like the `pushing down' method. Obviously havn't tried it yet but it makes sense.
 
hmm.NOT an expert and there's videos like the above to help ....but old second hand Handlebars are often slightly bent so it's difficult to judge misalignment using them. Take the handle bars off and use a broomstick or similar. Overlong helps.
Try to simplify the lineups if you see my drift.

also Cameras can distort things but the forks don't look right from the front view. (apart from the top view "twist" )They seem to pinch together towards the wheel? If my eyes are not mistaken, remove the wheel and see if you can get everything parallel...see if the holes line up easily. surfaces of holes should be parallel even though the tubes can go up and down on the stanchions.
Might be spacers at the axle. double check from parts fich ande manual.... Might be tripletrees are not "parallel.
put a long dowel/broomstick through axle holes- Just the axle is ok but the long dowel helps to eyeball "perpendicularity". Likewise, at the triple trees.

You likely will redo forkseals anyways so having them apart to check springs, parts, will help fiddle/check alignments.
 
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Handlebars are new so I can rule that out but I see your point with checking all the pieces are aligned vs. just the overall assembly.

Gorminrider said:
also Cameras can distort things but the forks don't look right from the front view. (apart from the top view "twist" )They seem to pinch together towards the wheel? If my eyes are not mistaken, remove the wheel and see if you can get everything parallel...see if the holes line up easily. surfaces of holes should be parallel even though the tubes can go up and down on the stanchions.
Might be spacers at the axle. double check from parts fich ande manual.... Might be tripletrees are not "parallel.
Click to expand...

Now that I look at it more carefully it does look like the spacing at the wheel is narrower than at the top. I'll definitely double check that I have the spacers correct. Luckily I have an intact 450 to compare with as well as the fiches.

Thanks for all the input so far - I'll get to this tomorrow.
 
Look at the forks from the side and see if they are parallel. My bike had a similar symptom and I found that the the steering stem was bent, causing the forks to be misaligned and therefore the wheel not in line with the bars.
 
This issue is not unusual. Loosen everything on the front end and tighten from the bottom up.
 
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