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  #1 (permalink)  
Old 10-11-2017, 04:01 PM
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84 fxrt upgrade help

Hey there guys, haven't been on here in a long time as I haven't owned a Harley in forever. I recently picked up an 84 fxrt for a steal and want to do a few things to it and need some help. First off I want to ditch the oil bath chain (already have a replacement rear wheel) and replace the primary for a sealed primary and go with a spline shaft trans. Will any 90s/early 2000s primary,clutch/trans fit to the frame and first year 80" evo or what exactly should I be looking for? I know the 90s fxr stuff will fit but that stuff is getting quite expensive with people asking $500 just for inner primaries. Having a hard time finding a strait answer as to what all will fit so any help is appreciated. Thanks guys.
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Old 10-11-2017, 06:47 PM
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John from Scooters can give you the straight dope but I believe you'll need a '91-'99 primary(I think FLH or FXR), trans(FXR), starter, and I believe an oil tank...this is just off the top of my head but I assure you John will have an exact answer.
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Old 10-12-2017, 09:20 AM
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awesome, thanks for the tip
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Old Yesterday, 06:39 PM
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90The 84-88 FXR's used a different primary than the 89-93 or 94-98 but the 89-93 stuff will fit especially if you are upgrading the tranny. Primo makesa kit with an open belt drive for the FX Shovels. I dont see anything they offer for a rubber mount engine. You can use a FLT inner if you are running forward controls. Thats what I did on my hotrod FXR. The inner I found had the boss fo the shift linkage which I removed before I powder coated it. I have forwards on my FXR. If you are running mids you will need an inner with a hole for the shift linkage. You can upgrade the tranny to a splined shaft by just changing the mainshaft. It was a popular mod in the 90's. The rest of the parts in the tranny will work with the newer mainshaft.

In my opinion good used HD parts are better options than aftermarket for the cast primaries. The easiest way to tell the primaries apart are the size of the stater jackshaft busing in the outer is smaller on the 94-99 primaries. Rough estimate 1/2-5/8" verses 7/8-1" on the older primaries. The inner can be identied as FXR or FLH by seeing where the shifter bushings are. There wil be a casting number in the stock primary. It will help you be sure its a HD part and if it has a -90-93 after the first 5 digits its the earlier one. If it has -94 or newer its the newer design,

If you are having trouble finding an earlier inner primary you could use the 94-up stuff but everything including the starter, jackshaft inner and outer primary has to be from the same era. PM me if its gets confusing I will help you get the right parts the first time.
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