so i was waiting to do a complete front end rebuild thread but usps has shipped my hubs to denver dead mail depot (fml) with no delivery in sight so heres a lil teaser
first i did the factory threaded lowers, i had to drill out the existing threads and then i tapped them to m16x1.5...
i clamped a peice of wood to the table of my drillpress that overhung the side , it was tapered to fit in the arch of the arms and hold the ball joint mount level for drilling
i used a 9/16 bit (a little bigger than the 17/32 required) but its all i had and the loss of thread debth i believe to be negligable over the lengh of the tube
then i clamped it in the vice and started tapping the hole, it took some effort when i got to the welds on the back side (im assuming the act of welding hardened the steel at that portion of the tube)
the uppers were a smooth bore and didnt require the initial drilling, they tapped beautifully, again i took some liberties in that worst case they can be smooth bore again for the upper adjustment and only require a jam nut to function as stock
the ball joints are the rs3003 yamaha taper balljoints, these are the best joint on the market for us
here are the completed arms
if anyone has a donor set of stock honda 300ex/400ex arms(preferrably with blown ball joints) i would like to try modifing them to accept the rs3003 balljoints (if i remember correctly these joints fit honda hubs as well)
i think i can cut the stock joint off after the tube and tap the remaining peice, giving a servicable ball joint to a welded joint arm
first i did the factory threaded lowers, i had to drill out the existing threads and then i tapped them to m16x1.5...
i clamped a peice of wood to the table of my drillpress that overhung the side , it was tapered to fit in the arch of the arms and hold the ball joint mount level for drilling
i used a 9/16 bit (a little bigger than the 17/32 required) but its all i had and the loss of thread debth i believe to be negligable over the lengh of the tube
then i clamped it in the vice and started tapping the hole, it took some effort when i got to the welds on the back side (im assuming the act of welding hardened the steel at that portion of the tube)
the uppers were a smooth bore and didnt require the initial drilling, they tapped beautifully, again i took some liberties in that worst case they can be smooth bore again for the upper adjustment and only require a jam nut to function as stock
the ball joints are the rs3003 yamaha taper balljoints, these are the best joint on the market for us
here are the completed arms
if anyone has a donor set of stock honda 300ex/400ex arms(preferrably with blown ball joints) i would like to try modifing them to accept the rs3003 balljoints (if i remember correctly these joints fit honda hubs as well)
i think i can cut the stock joint off after the tube and tap the remaining peice, giving a servicable ball joint to a welded joint arm
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