The suspension effect you get from forks comes from the air left inside the fork, after all you cannot compress a liquid. If you change to thicker oil and try filling it up a bit more you will effectively stiffen the forks. Just make sure you still have air in them, don't fill it right up cause then you won't have any suspension.

Would not hurt to put fresh oil in and seals, make sure you clean all the gunk out of the fork legs, progressive fork springs would be significant improvement. If you are using new springs would keep same oil weight to start off, otherwise could be over the top. Ask spring suppliers for reccomended weight come to that

@ryanjimccfc The shocks for all 3 bikes are 410mm in length and the YSS item is listed as being compatible for all 3 bikes, which means it should be a straight swap for the OEM unit. The YSS unit's also offer adjustable pre-load and compression too, just the same as the DT200/Lanza's units just without the external reservoir, so you are getting pretty much the same spec as a used 200 unit all in one package. Plus I think the YSS has a stiffer spring over the original shock? So all_in_all it's a simpler upgrade with less hassle of fitting and mounting the res. If you have the cash then I would go for a new and improved shock over an old used unit everytime. https://www.ebay.co.uk/itm/YSS-REAR-SHOCK-YAMAHA-DT-R-200-1989-2006-SHOCK-ABSORBER-331/183127097768?epid=24009232077&hash=item2aa339c1a8:g:ai4AAOSwRH5XKxXH https://www.ebay.co.uk/itm/YSS-SHOCK-ABSORBER-ADJUSTABLE-REAR-MONO-For-Yamaha-DT-125-R/142012163491?epid=517329238&hash=item211095a5a3:g:2mcAAOSwnFZXUAUJ

In terms of stiffness I can't say I felt much difference, it feels slightly higher with the R damper.

@2stroketerry well maybe my experience it bet my cat on it being the dog bone semi seized

Yeah heard good stuff about that

Starts to wobble at 70mph and greater when when I suddenly let off the throttle with the clutch engaged? As long as throttle is on, there is no wobble at all past 70mph, although the faster I go before I let off the more violent it gets. All bearings are fine as are swinging arm bearings, bushes etc. Tyres are bridgestone nobblies standard size.

@darty said in Rear dog link bolt diameter: @NINJA Your mad, 1mm clearance is not acceptable for concentric fits under load here?? Thanks for enlightening me!!!

Burnt the rubber. I have done loads of these in the past, not on the shock of a dt, but when I polybushed my car I had ton take out loads of them and they are never easy.

@sgt-robuck-5 Just havea look anyway. Poly bushes last a life time and give many benefits.

Them Haynes manuals are worth their weight in gold!!!

@nottsbiker that's exactly what I'm struggling with - I've tried an old wooden curtain pole trimmed down but I can't shift it - absolute pain in the balls

@vtrn_raptor See this thread and speak to @tdrgreg2 He used a set of Aprilia MX 125 USD's which were almost a direct bolt on, just one spacer required. https://dt125r.co.uk/topic/1020/dtdr-build

He gave me these dimensions : Bottom of the stem is 30mm Top bearing inside diameter is 28mm. Top to bottom length is 250mm. Anyone measure or have measurements for the DT?

I considered the hyperpro progressive springs for mine, but they were listed for the R not the X that I've got. Glad I didn't buy them because mine already had progressive springs in! I went with 15w oil and it's much better now

No worries - gf has a nuclear red Speed Triple or pink in the real world

Might as well get some USD forks if you are going to be getting a new set to fit the bike, as most forks will need modifications done for correct fitting.

http://www.wemoto.com/bikes/yamaha/dt_125_x/04-07/picture/swinging_arm_pivot_bearing_kit_slinky_glide/ http://www.wemoto.com/parts/picture/al-40-2134/