92KK 84WW Olaf
Life time member
Number of posts : 7955
Kafflut wrote:I'm asking this question on behalf of my friend Phil. I've also hankered after lower revs on my K100 and there may well be others too. Or maybe someone who's done it.
Has anyone ever changed the bevel drive ratio on their K100RS ? The R1200C has a bevel ratio of 2,54 ; I think 28 + 11 teeth. This would make the bike a ( hopefully ) much nicer tourer, dropping revs by about 9% ( 2,82 standard ratio ). I think the 2,82 ratio is 31 + 11 teeth.
The problem is : are the bevel gears interchangeable? Obviously the housings aren't but the innards may be interchangeable.
The inners are interchangable, just not sure the exact ones. I do have a file someplace setting out suitable ones but I think you are on it. You need a matched pair. The big bearings are the same in a lot of final drives too.
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1992 K100LT 0193214 Bertha Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red 578 bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 689 58,645 now 106,950 miles Deceased.
1983 K100RS 0011157 Fricka 606 Alaska Blue 29,495 miles Damn K Pox Its a Bat outta Hell Now 58,200 miles.
1996 K1100LT 0233004 Lohengrin Mystic Red 38,000 miles currently 51,800 miles.
1983 K100RS 0004449 Odette R100 colours 58,000 miles. Sprint fairing now 63,390 miles
Past:
1968 Yamaha 80 YG1
1971 Yamaha 125 YAS-1
1968 Honda 125 SS
1970 Honda CD 175
1973 Honda CB500-4
Honda CX 500