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The TTR250 FAQ web pages -> TTR250 -> Repairs and maintenance -> RAID rear shock adjustments query....
Post Info TOPIC: RAID rear shock adjustments query....
thebertie


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RAID rear shock adjustments query....
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I have recently been bottoming out occasionally on the rear shock and believe the best way to reduce this is to increase the compression damping.  As I understand it, this is normally very easy on a TTR, just requiring the hand rotation of an adjustment knob on the remote shock reservoir canister....but sadly I have a RAID model.  This means that there is no adjustment knob, just a banjo bolt with a hose running to the shock at one end, and a single very small screw in the other end of the canister.  I am aware that the unit should contain high pressure gas,  therefore I am being careful about taking apart.  I have  removed this individual screw, to find that there appears to be some kind of thin gas type valve port behind, which I can only assume might be used to apply extra gas with some kind of pump?  Can anyone clarify if this is the case?  My only other options would appear to be, to purchase an entire replacement second hand TTR shock unit from a standard model, or some kind of aftermarket unit.  A stiffer spring might help a bit, but isn't really the right solution for increasing damping.

Would be very grateful if anyone could offer advice, RAID owners are seemingly a very quiet bunch....



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TTRfan


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Hi Robert

Your shock isn't that much different to the OE one. The main difference is the lack of adjuster on the reservoir.

There is a rubber pellet under the screw you have removed and a nitrogen needle is required to check/pressurise the reservoir and shock - see https://totallyttrs.com/epages/699105d9-e4cc-4b32-b236-84e72cd67f84.sf/en_GB/?ObjectPath=/Shops/699105d9-e4cc-4b32-b236-84e72cd67f84/Products/TTR-0843

Lots more info here - http://ttr250.com/Shock_rebuild/TTR250_rear_shock_rebuild.htm

Brian



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thebertie


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Brian

Wow...the depth of information you have just given me is kindof incredible. Thanks!

Robert

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thebertie


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Don't mean to be a cheapskate, but a bicycle shock pump and a 99p football inflator needle would surely do the job? Does the special "nitrogen needle" that costs far more than the pump itself, offer any particular advantage?

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TTRfan


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I think there may be a case of an owner that tried a larger needle and damaged the rubber pellet cry 

The pellet has to self seal after re-pressurising.

If you are able to source a replacement pellet (just in case it goes pear shaped!) then maybe take a chance. I know what I would do wink

Brian



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ttr steve


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thebertie wrote:

Don't mean to be a cheapskate, but a bicycle shock pump and a 99p football inflator needle would surely do the job? Does the special "nitrogen needle" that costs far more than the pump itself, offer any particular advantage?

 You will damage the rubber bung and ruin your shock if you do not use a nitrogen needle



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thebertie


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I guess I would always have the option to drill and tap, then put in an old schrader valve if things go wrong, as per your guide.  I will find a proper needle to give me the best chance of success, thanks for the advice.



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