Swing arm spindle to bush clearance?

If one had their durthers, What would ya set the swing arm spindle to bush clearance with graphited grease layer? Peel's oversize spindle is ~0.0011" more OD than standard so is ~0.0011" larger OD that ID of new HD bushes from baldy. I mainly need grease to keep rust down not friction reduction so tighter the better w/o binding. May have to trial and error creep up on clearance to be able to pass shaft thought 2 bushes in line but new RGM swing arm should be as good as it gets and passed though prior bushes perfect. I think maybe ~ 0.0011" gap would be about right.

for an .875 shaft a typical tolerance is .876 to .877 for this type of bearing. So .001 to .002 clearance.

Good luck

Hi Hobot, when we did king pins in the good old days, we reemed the bushes out with adjustable reemers [ after fitting to stub axel of course ] till the king pins just fitted [ ie tight but turnable ]. We did not use micrometers to work that out.
In your case, make sure your king pin [ pivot shaft ] is a bloody tight fit in your frame [ not the push fit the bloody useless manual tells you ]

All the best

I'm still high from taking another Peel item to Robert's Tool and Die shop in the woods spending most the time showing off his new toy and added features of road legal Suzuki 650 thumper and the how comfy nice to hop skip and drift it about anywhere. Learned there's bunches of clubs doing the off pavement rides here that he joins in regularly. Hot doggie doo as kind of riding in public thrills me most of all. Talked myself out of a trade for 4 wheeler blaster with one gear and hi rpm clutch engagement flat tracker racer he said he'd gotten to spin tires tearing up pasture while holding a wheelie by wide eye'd glee of mid 60's dude. Said just to point shoot commitment to ride on THE Gravel or police called in for the inevitable traffic or animal collisions. Its a killer right now he said because the swing arm plastic bushes and fork stem are trashed so my fancy bushes inspired him to DIY and be done a while. Btw the photo's of Peel hi-centered on mogul and on her side were taken in his back woods play ground so site of Ms Peel first real proving of full tri-linked wonder-hood which is only reason its worth spending on such nit pick upgrade items and hassles in first place.

We mic'd the old bushes to find my hand job left them egg shaped. Baldy HD bushes were .880" ID. so equal to OD of spindle. We checked the nice slip fit of rear axle thru swing arm alloy pucks [eccentric hole adjusting chain by twist in swing arm bores] to find about .002" clearance, so decided to narrow down bush/spindle gap to ~.008" by lathing ID out 0.0011" plus some ~.00027" off spindle hard case coat by a polishing tape. The HD bushes were .002" over size to slip into swing arm bores, which hes said is perfect once bushes froze and sa bore heated then may just slip in by hand to cool off locked tight. The installed .002+" crush fit will narrow down bushes ID to end up close to .008" grease-graphite holding space. Thank goodness Ms Peel may be as square true as late Augustine's WSC, so should slip in no problem. Also got RGM air tank swing arm water drain holes thread tapped for plugs and some other detailing out the way.

hobot said:

If one had their durthers, What would ya set the swing arm spindle to bush clearance with graphited grease layer? Peel's oversize spindle is ~0.0011" more OD than standard so is ~0.0011" larger OD that ID of new HD bushes from baldy. I mainly need grease to keep rust down not friction reduction so tighter the better w/o binding. May have to trial and error creep up on clearance to be able to pass shaft thought 2 bushes in line but new RGM swing arm should be as good as it gets and passed though prior bushes perfect. I think maybe ~ 0.0011" gap would be about right.

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Grease of any kind is not compatible with the bushing material. It will build up a surface layer blocking the micro pores that hold oil and provide the lubricating film. Use very light machine oil liberally on the spindle and bushings when assembling. Thereafter, introduce either 80-90W or 140W gear oil which will fill the entire swing arm cavity and prevent any rust. You can also convert the centre bolt to a hollow stud with ferrule to hold a 1/4 hose that can run up under the seat for easy refilling once a year.

Sorry ML but your mechanical logic may well apply to everyone else but its wasted on me as I already know its not friction or lube that matters to me on hard steel spindle inside dissimilar softer metal non porous new bushes, just rust protection and sealing out grit and water. Another against the grain feature of me and Peel. Even if there's some resistance to force Peel spindle though both bushes it will work like i want it too a long hard time. I have removed the grease zerks realizing they are now useless and if grease drys out the graphite won't-