evo cylinder question
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Road Captain
Joined: Apr 2008
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From: Monroe, NC
evo cylinder question
Working on a custom( not even sure of brand) and redoing the top-end and it needs new pistons. They have a harley # of 22091-830 and cylinder # 16584-83B. The pistons are std bore and measure right at 3.49" I need to know what pn# to order for new pistons. Before I call and have to deal with the stealership..are these the numbers I need to use to re-order pistons for the rebuild?
HDF Community Team
Joined: Dec 2005
Posts: 5,396
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From: NC USA
Working on a custom( not even sure of brand) and redoing the top-end and it needs new pistons. They have a harley # of 22091-830 and cylinder # 16584-83B. The pistons are std bore and measure right at 3.49" I need to know what pn# to order for new pistons. Before I call and have to deal with the stealership..are these the numbers I need to use to re-order pistons for the rebuild?
The pistons can each be purchased as a kit. Part# 21940-83 for 1 piston, standard size 3.498 with rings. locks and pin. The rings can be purchased separately, Part# 21920-83 and that's for 1 cylinder only.
If you're not going to oversize the cylinders, and assuming the pistons aren't damaged and/or the wrist pin bushings need replaced, I'd recommend simply buying new rings, scuff hone the cylinder with a 240 grit ball flex hone and leave it at that.
HDF Community Team
Joined: Dec 2005
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From: NC USA
You're welcome. The number for the cylinder and piston kit together is 16512-86A (black) or 16510-83A for the silver finish. They are pre-honed/fitted from the factory and about 275.00 each, list price.
Seasoned HDF Member
Joined: Aug 2007
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From: NW AR
BigLebowski, you can't tell without pulling it apart and measuring. The cylinder with the OEM part number on it would indicate that's a HD cylinder, but if someone has been into it, you don't know what they did to it. It could be anything from nothing at all to something crazy.
HDF Community Team
Joined: Dec 2005
Posts: 5,396
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From: NC USA
The reason you cannot reference that number is because HD will not sell a cylinder alone for the 1340 Evo, it comes in a kit with piston, etc. as mentioned in previous posts. Sportster cylinders can be purchased separately.
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Elite HDF Member
Joined: Sep 2007
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From: Bluffton, South Carolina
Have the cylinders "miked" then buy a good quality set of forged pistons with a decent set of valve reliefs. The valve reliefs will allow for future cam improvements. Then have your cylinders bored by a reputable shop. Your cylinders have been heat cycled and will remain truer than a new set. Hope this helps.
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