Thank you Norbi and Gene … I’m pretty sure the shape I have in mind for Donner’s Yoke will be perfect … I was allowing for just under 6” so I’m pretty sure it will work just fine … Im building the yoke in the morning and I plan to road test this new addition before the coming week is out …. then I’ll put together a more complete story with picts on “My Exhaust Pipe and Bobber Build” so you get a better idea about this entire project and where this info fits in. Thank you for your help…. If Donner trails or trailers as well as he’s looking this project is going to be better than I could have imagined, second coat (final) of the urethane bed liner goes on Sunday … final assembly 1st part of next week, road test on Wednesday weather permitting … Again thank you both …. BlitzI found this in a German forum (auto-translated), maybe helps:
“- I have measured the steering factor (spring travel/damper stroke) again (several times and with greater effort) and come to approx. 3,1. So far, I had written about 3.36, which I hereby revise with remorse. 1 cm stroke of the damper thus corresponds to about 3.1 cm change in height of the saddle, measured from the wheel axle vertically upwards to the lower edge of the saddle. It was measured with the Bilstein spring strut with removed spring. The stroke of the leg to stop buffer is 30.4 mm, when using this stroke, the rear height (verpenal axis to saddle lower edge) changes by a good 94 mm.”
See if you find out more there with auto-translate.
Scrambler/UGS: Vergleich Federbeine Sachs - Bilstein - Wilbers 642 - BMW R nineT ForumNoch ein Federbein-Trööt :kasper Nachdem ich nun 3 Federbeine für den Scrambler habe, möchte ich diese mal gerne als Entscheidungshilfe für Unentschlossene gegenüberstellen. Gleichzeitig muss ich einige Werte korrigieren, die ich in vorhergehenden…www.ninet-forum.de
I just measured my bike (on center stand, so rear wheel off the ground).
At 5“=125mm movement of the wheel, I‘d have contact of my hugger with the underseat!
So, if the rear shock really travels the stated 4.7”=120mm, and there’s a 3.1 leverage factor, then… what?!?
Now I’m confused. Either the shock doesn’t use its full extention (what’s the point of that then), or something else is off with this math. Good thing I’m not an engineer.
Now I try my common sense method: Maybe, just maybe, the stated 4.7”/120 mm is actually measured in the rear, (and the shock itself therefore moves only 120mm/3.1, therefore 38.7mm or 1.55”)? That sounds a lot more like the numbers of the guy above.
🤞🏻………. Norbi …. Wow is so cool to have a translation from the source …. Thanks Mate …………