Doubt in frame

I had an incident a few years ago basicaly I had hit a car from behind at about 30-40 mph I think. And after I have fixed it I'm feeling the bike pulling to a side while I'm driving in a straight line. I almost changed everything excluding the frame which is very expensive it costs half the bloody bike and the swingarm. Could it be that the frame has been bent or it's impossible for it to get bent as it is very strong and robust.

frames can bend, can you get it check'd out on a jig at a local bike dealer?

Unfortunately there's no one here who has a proper jig, as it isn't worth it here to get equiped for such a small amount of bikers, don't forget that we live in a 60 square mile area here which is relatively small.

If you replaced the forks, or you know the ones you've got are straight, I'd suspect that the forks are twisted in the yokes rather than the frame being bent.

[jambo]

Start with the simple stuff and work up, it may just be wheel alignment fo instance.

Check the wheel alignment using a straight edge or taught piece of string. A straight line from the front and rear edges of the rear tyre to the front tyre should leave the same gap to the left and right of the front and rear edge of the front tyre. The Hanes manual explains this process.

You may just be able to use the chain adjusters on either side of the swng arm to get the wheel lined up.

If that fails you can check other components from there.

Originally Posted by jambo

Start with the simple stuff and work up, it may just be wheel alignment fo instance.

Check the wheel alignment using a straight edge or taught piece of string. A straight line from the front and rear edges of the rear tyre to the front tyre should leave the same gap to the left and right of the front and rear edge of the front tyre. The Hanes manual explains this process.

You may just be able to use the chain adjusters on either side of the swng arm to get the wheel lined up.

If that fails you can check other components from there.

I have tried that twice to be sure but I still get the same feedback from the bike, I have also changed the forks with a pair of new ones, I have changed the yokes too and changed the handle bars with the new clip on risers, I am spending a lot of money for nothing, I'm like going mad

[rictus01]

you can do some rudamentry frame checks your self with only some string a straight edge and protractor.

Choose a point on the side of the frame, run a bit of string from that point around the top of the headstock to the same point on the other side of the frame, mark the centre of the headstock on the string and make sure both sides are the same, do the same for the bottom of the headstock (this will show if the head stock is rotated left or right within the frame).

then remove the yokes and run the string threw the headstock, using a protractor set the straight edge at 90 degrees from the centre front(between top and bottom) of the headstock, mark the string at the point of exit (top & bottom) of the headstock and bring both ends to the end of the straight edge, ( this will show if the headstock is twisted up or down, or ovaled).

other basic straight edge mesuring should also show if the frame is out.

Not the idea way to check, but if you don't have access to a jig, it's easy and cheap to do.

Cheers Mark.

Originally Posted by rictus01

you can do some rudamentry frame checks your self with only some string a straight edge and protractor.

Choose a point on the side of the frame, run a bit of string from that point around the top of the headstock to the same point on the other side of the frame, mark the centre of the headstock on the string and make sure both sides are the same, do the same for the bottom of the headstock (this will show if the head stock is rotated left or right within the frame).

then remove the yokes and run the string threw the headstock, using a protractor set the straight edge at 90 degrees from the centre front(between top and bottom) of the headstock, mark the string at the point of exit (top & bottom) of the headstock and bring both ends to the end of the straight edge, ( this will show if the headstock is twisted up or down, or ovaled).

other basic straight edge mesuring should also show if the frame is out.

Not the idea way to check, but if you don't have access to a jig, it's easy and cheap to do.

Cheers Mark.

Thanks I will try that out