1988 bike
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Not easy finding correct needle, no UK source I could find, Wemoto do a aftermarket kit for the tzr (keyster brand) was going to be my only option as closest available, found correct part at csmnl but postage for one part expensive. Had to have it though, original needle deformed at tip. spent this eve fitting oil pump and Water pump, cleaning up carb heater spigots on cylinder head. Found some decent used rad hoses in my box of spares, trying to keep all original.
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Cleaned and removed bearings, then noticed gouge in swing arm fork, looks like chain has been rubbing. Only minor really but want perfect finish so on to swingarm no 3, cleaned all the oil and grease off and looks OK, pivot bearing sound but main bearings shot, replacing those anyway. Weather permitting will be outside tomorrow removing my third set of bearings, just call me lucky
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@oldman how’d you get on? How much play do you allow on your linkage
Swingarm bearings replaced and relay arm bearings all cleaned and regreased, pivot bushes excellent on swingarm no3 so no play in it at all, 3rd shock was also good both ends with no play and good compression damping. Put together yesterday and happy with assembly, started front forks today, overfilled and smelt like pond water
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@oldman Progressive springs are on my phase 2 upgrade wish list for my MX, If I had kept my DTR I would have fitted Wirth progressive springs to it. There are quite a few reviews out there, so a Google search is well worth the effort to be more informed. I found these 2 to be quite illuminating tho;
https://motorbikewriter.com/progressive-linear-springs/
https://www.xt660.com/showthread.php?t=19823
It appears that rider weight and riding style affect the progressive springs more as the forks become compressed. AKA Greater compression increases the stiffness of the forks. Obviously the heavier the rider the more pre-load is placed on the forks, ergo more compression. And if you're an aggressive rider then the same stiffness applies, during the increased bouts of fork compression. The true test would be to ride 2 identical bikes other than standard springs vs progressive springs and then you will have an instant comparison.
