Author Topic: YZ250D fork top out springs - advice required please  (Read 5218 times)

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Offline Iain Cameron

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Re: YZ250D fork top out springs - urgent advice required please
« Reply #30 on: October 27, 2013, 05:36:15 PM »
So Simo what did you end up doing to them and what did you do with the rear end .
Yamaha tragic ; dt1, rt1, dt2, rt2, dt2mx , rt2mx , mx250, mx360,sc500, 74dt125, yzx125, yzc250, yzc400, yzd250, yzd400, yzh250, yzh80 , dt100 , xr75 ko xr80 03 , it175 82 . Not a member of any club

Simo63

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Re: YZ250D fork top out springs - urgent advice required please
« Reply #31 on: October 27, 2013, 05:57:11 PM »
So Simo what did you end up doing to them and what did you do with the rear end .

The rear shocks on all my three 77 yz's have been lowered internally to limit travel to under 229mm.  The forks on two of them have been done professionally as we'll but this one I was trying to do myself hence asking for help.  :)
« Last Edit: October 27, 2013, 05:59:23 PM by Simo63 »

Offline LWC82PE

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Re: YZ250D fork top out springs - advice required please
« Reply #32 on: January 07, 2018, 03:18:18 PM »
Can anyone here provide exact free length dimensions +/- 1mm of the D or E negative and rebound springs and for those that have removed the stock negative/rebound springs, would you be willing to sell them?
Wanted - 1978 TS185 frame or frame&motor. Frame # TS1852-24007 up to TS1852-39022

Offline Slakewell

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Re: YZ250D fork top out springs - advice required please
« Reply #33 on: January 08, 2018, 12:32:54 PM »
Most of the YZ fork travel is at the brochure. If you use the tired and true zip tie test the travel is barely over 9 inches standard. Given that MA gives you 10% leeway they could pass in standard trim. If you are not going to win I would leave them standard. Saying that if you follow my set up in this thread they end up better then standard. Air assists forks never took off for a reason.
The top out springs need to be 50mm + spacer. If you want to use air assists method. Find some 30mm fork springs and cut them 150mm. All the old YZ stuff I have pulled apart are all stuffed and unusable. 
Current bikes. KTM MC 250 77 Husky CR 360 77, Husky 82 420 Auto Bitsa XR 200 project.
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Offline LWC82PE

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Re: YZ250D fork top out springs - advice required please
« Reply #34 on: January 08, 2018, 03:16:10 PM »
So the short is 50mm and long 150mm?
Wanted - 1978 TS185 frame or frame&motor. Frame # TS1852-24007 up to TS1852-39022