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in 88, what inch sporty was out.
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[COLOR="Navy"]883 & 1200 models (1200 replaced the 1100). Differences in cylinder bore (3" vs. 3.5") & combustion chambers/valves, but everything else the same (cases, flywheels, rods, stroke, trans., etc.). [/COLOR]
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also, the oil line to the head, does the head have to be removed to change the "o" ring?
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[COLOR="Navy"]There is no external oil line to the head as on several earlier H-D models - oil goes up thru the pushrods/tubes. The pushrod tubes have O-rings top & bottom & those can go bad. I'm almost positive '88 models had collapsible pushrod tubes rather than 1-piece as on later models - I say that because my race engine is based on the '86-'90 case design & when building it, I bought collapsible pushrod tubes for those year models.
That design makes the O-rings a lot easier to change out because you don't have to take anything else apart if you have adjustable pushrods & can shorten them up enough to pull them out from the right side of the engine. If not, you have to pull the rocker boxes, loosen up the rocker arms & pull the pushrods out the top.
However, there is a trick I've used - pull the pushrod tubes, cut the O-rings with a razor-knife & remove them. Then clean everything up very, very good. Then take your new O-rings & very carefully, with a new razor blade, cut the new O-rings @ a 45-degree angle @ one point in the circle - so you can open up the new O-ring to get it around the pushrod. Then ease it into place & get it seated properly so the cut will line back up perfectly & disappear.
You have to take your time with this & you need to coat the area where the O-ring seats & the O-ring itself with a heavy straight-weight oil, like Valvoline Racing Oil, SAE 50, or even 60. But if you do it right, the cut O-ring will seal right back up @ the cut. Put the pushrod tubes back on carefully so you don't dislodge the O-rings & you're good to go.
Start the engine & see if you get any oil seepage where a pushrod tube goes into a tappet block - if you do, you'll have to do the job over again. But it's worked for me & on an engine that flows a heck of a lot more oil than a stock one does. [/COLOR]