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I put a set of progressive in a bike a few years ago and not sure but seems like they recommended no air with there springs , might want to check there web sight
Be sure to check the air each time before riding, that way you will get an idea of if or how bad the might be leaking. If they are leaking then track down the source and fix it.
This thread came in handy for me. I have a buddy that just bought an '05 Road King and he needs air in his rears. I'll pass this information along. THANKS!
P.S. I have the bicycle tire pump and a low pressure gauge I bought for the 3 wheelers that will come in handy for this operation. Just in case anybody's wondering what to use to get it done.
I've not dealt with aftermarket springs at all, but OEM springs for that front end ARE different from air, to non-air ride models. So, you may not need any air at all, or a much lighter air pressure with the aftermarket springs... Just play with it and see what works for you.
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