92KK 84WW Olaf
Life time member
Number of posts : 7955
Paul75 wrote:Guys this is a good thread. A question though, I am looking to buy an R100 to turn into a really nice high quality cafe racer build. The bike that I have found is the LT model, I understand that this has all of the extra fairing etc etc - which I won't be needing. My question is with the 3 different models, if you stripped them down to just forks, frame and swingarm is there then any difference between them? This will really help me decide which model I should be looking to get.
Cheers in advance guys
Paul
Up to 89 mechanically almost identical, 2 valve engines, one little difference being the final drive ratio on RT/LT are the same but the RS was geared a little higher. Engine performance and tuning identical although there are stories about early camshafts being 'hotter' and my 84RT always felt more perky that my 92LT.....
Exhausts, handlebars, clutch, choke and throttle cables, ignition impact pad differ. Also various wiring changes and upgrades that affect using parts from different years. Forks also changed over time and again early/later ones vary as to how you may interchange them. I have a feeling RS ones may have been a little different.
ABS was added to RS and LT, its not designed to be retrofitted and quite a few parts differ too. Engine power output is same across all 2 valve engines. The only really simple option is putting K75 pistons into a K100 as they are higher compression ratio and a straight fit.
89 for model year 90 the RS became 16 valve and upped from 90 to 100bhp and with completely different ignition system. The K100LT remained 2 valve and 90 bhp with added accessories.
But things like ancillaries water/oil pump, starter, alternators are interchangeable between both engine types but the usual modifications that happen during the life of a particular model mean be careful of year of manufacture.
The ideal candidate is a K that's suffered badly in the cosmetic side of plastics etc but its reasonably good mechanically.
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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