Hi guys,

The other day I did put new HP progressive springs on my XTR. However during the test ride at speed above 120 km/h I experience weaving of front (steering bar). After I adjusted the rear spring preload to max the problem seems to have improved a bit but still there. And I am not a heavy bloke wright 80 kg plus never had this problem before.
My first thought was to buy rear hyperpro spring and change it, which I will but still wandering.

Any ideas?

Thanks.

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that is how i feel about my XTR
Mods so far:
Hyperpro front springs; Hyperpro rear shock spring; modified air box; LED tail light; LED indicators + new relay; YZ pegs; Lucas aluminum bar; brisk spark plug; snorkel removed; DNA stage 1; second hand DynoJet O2 mod; crash bars; front and rear steel braided brake lines; soft EBC brake pads; mitas 07 tyres, 2in1 Metal Mule exhaust, Blocked AIS, tall OEM screen, OTR bash plate

Not totally sure, but as far as I recall, I think they recommend raising the forks through the yokes by 5mm when fitting them. Which would achieve the same effect on the geometry as raising the rear with increased preload, but without the side effect of loosing sag/comfort/traction at the rear. If you're a heavy bloke, then you may well be riding too low at the back (relative to the front) now you've got better/newer/stiffer springs fitted up front?

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Thanks, mate.
I will try.

__________________
that is how i feel about my XTR
Mods so far:
Hyperpro front springs; Hyperpro rear shock spring; modified air box; LED tail light; LED indicators + new relay; YZ pegs; Lucas aluminum bar; brisk spark plug; snorkel removed; DNA stage 1; second hand DynoJet O2 mod; crash bars; front and rear steel braided brake lines; soft EBC brake pads; mitas 07 tyres, 2in1 Metal Mule exhaust, Blocked AIS, tall OEM screen, OTR bash plate

Check the "model specific" sticker outer cover of the Hyperpro instruction booklet and it will tell you how much you need to raise the forks through the yokes.

I have just done front springs on my Tenere and had to raise them 10mm through the yokes.

Still waiting on my rear spring turning up (bike in bits) so not tried the handling yet. Time will tell.....

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2011 XT660Z, in BLACK of course!
Mods done:
Lost the will to keep track!

Thanks, Sandman.
Looks like we have the same problem - "bike in bits"
Would have been a perfect world otherwise.

__________________
that is how i feel about my XTR
Mods so far:
Hyperpro front springs; Hyperpro rear shock spring; modified air box; LED tail light; LED indicators + new relay; YZ pegs; Lucas aluminum bar; brisk spark plug; snorkel removed; DNA stage 1; second hand DynoJet O2 mod; crash bars; front and rear steel braided brake lines; soft EBC brake pads; mitas 07 tyres, 2in1 Metal Mule exhaust, Blocked AIS, tall OEM screen, OTR bash plate