Author Topic: XT500, de rake? Better turning?  (Read 1361 times)

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Offline Curtis

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XT500, de rake? Better turning?
« on: May 30, 2016, 09:13:51 PM »
Iv decided to play around with the old girl again. Iv got a standard set up 76 XT500, I do a bit of everything with it.
Id really like to sharpen up the steering for dirt track, grass track mx..etc.
Whats my best options, de rake frame? 19" Front wheel? Drop the forks? Different triple clamps?

Offline mick25

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Re: XT500, de rake? Better turning?
« Reply #1 on: May 30, 2016, 09:56:40 PM »
I deraked a frame years back around 27deg what's a modern bike rake ,
But it changed the look of it to much because the rest of the bike was standard just my taste.

The tt500 I race now I just left it near standard and pushed the forks up through the triples to make it turn a bit better .
All the usa flat track bikes run 19 inch fronts 26/27 deg rake for the right corner speed .
You can try diffrent off sett triples but if it's a early model Tt,xt500 76 77 models the triples will hit the tank on full lock , it's allways the way you fix one prob and make another.
« Last Edit: May 30, 2016, 09:58:14 PM by mick25 »

Online jimg1au

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Re: XT500, de rake? Better turning?
« Reply #2 on: May 30, 2016, 10:51:18 PM »
also get a yamaha radian swing arm from the states fits in just change shock mounts
jim

Offline TT5 Matt

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Re: XT500, de rake? Better turning?
« Reply #3 on: May 30, 2016, 11:45:04 PM »
ask brent j on here about derakeing, id send you the pm's he sent me on it but ive got no idea how to resend as i wasnt born with a keyboard and mouse in my hands like the kids of today ;) ;D

Offline FourstrokeForever

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Re: XT500, de rake? Better turning?
« Reply #4 on: May 31, 2016, 10:50:03 AM »
Jacking up the rear of the bike with longer eye to eye shocks could be a way of trying the decreased rake before you cut and shut the frame.
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Offline brent j

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Re: XT500, de rake? Better turning?
« Reply #5 on: May 31, 2016, 10:58:14 AM »
I wouldn’t worry too much about changing the rake. Trail is far more important and has a greater effect on the bike.
Changing the rake does change the trail and most of the effect you feel through changes is from the change in trail.

Tony Foale proved this pretty well. In his book “Motorcycle handling and chassis design” he gives an example of changing the rake on a BMW from 30 degrees to 15 degrees to 0 degrees but in all cases the trail was kept the same by reversing the triple clamps and/or fork offset (by reversing the lower fork legs)
As the rake became steeper the bike had less tendency to follow ruts or cambers but the suspension tended to bind up during braking.

The overall balance of the bike is more important than any one thing. Personally I would get the suspension fixed first and see how it goes then. To change the rake with the std crap Yamaha suspension means you will be chasing other problems all the time
The older I get, the faster I was