hey i just bought my first bike a 1973 xlch and i want to change all the fluids. ive searched every were but i never can seem to get a straight answer. it just seems to turn into a pissing match about who uses the best fluid, wether it be sport trans of fourmula + or just plaint 75w 90. i dont mean to be short with anyone but i would just like to know the absoulute definitive answer on this. thank you.
Sport-Trans is listed for '71 bikes and newer in the P&A book.
Probably hard to find now as a lot of dealers only carry Formula+, the replacement fluid for Sport-Trans.
Either would be fine to use.
Other manufacturers make primary/transmission fluids for a Sportster.
Bel-Ray, RevTec, Spectro are some that come to mind.
I've used Harley Sport-Trans, RevTec and Bel-Ray and they all have worked fine.
I use Spectro semi-synthetic 20W50 engine oil so I wouldn't mind trying their primary/trans fluid but it's just harder to find.
All will work fine.
Change oil (no matter what brand you chose) when needed and you'll do fine.
"Beer has food value but food has no beer value."
2002 XL 1200 SE A/C & SE mufflers Mustang seat, Harley Hard Bags, Detachable Backrest w/Luggage Rack Kuryakyn Stop/Turn Signal Controller w/pulse brake, Pegs and Stirrups, Forward Controls, Memphis Fats Windshield
I use the formula+ in the tranny, like gusotto said I think any motorcycle tranny fluid would be fine. The 75w90 would probably work fine too the only difference is the tranny fluid has addatives for the wet clutch. I have read a few threads on here about problems using synthetic motor oil in the primary though the MOCO says it's O.K.
04 1200R 90+HP/10.5-1 SE pistons/.536 cams/Heads by MR T/mikuni HSR 42 w/25 pilot, 96 needle, 170 main/TC88A ignition w turbotas mod 33 map pos.4/ Supertrapp 2-1 w 23 disks/ 28T FRONT PULLEY /NRHS Hurricane A/C & adj. pushrods /progressive 440 shocks & fork springs w/10 OZ SE fork oil