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Discussion in 'Old's Cool' started by crazydrummerdude, Jul 27, 2007.
XS400 based ?
Yes I believe so.
Almost a Silk Purse out of a sow’s ear…
as a xs400 owner myself , the xs400 was my first bike.
this one should be called a cafe crawler...
the xs400 is at best uninspiring to ride
Read somewhere that Yamaha bought the 650 twin design from Horex. My dad was a motorcycle mechanic back in Holland in the 50s and always talked highly of the Horex bikes.
Love the Lone Star pull top beer can used as a catch can.
There was a company in Japan that made a 500cc twin with S.O.H.C. and Yamaha bought that company. The company was Hosk. Motorcyclist magazine ran a series of articles about the evolution of the Japanese motorcycle industry and in it stated the XS-650 evolved from the Hosk 500.
The HOSK was a loose derivative of the Horex Imperator 400 twin, so you’re both correct.
I would agree the Horex was one of the best makes. The German motorcycles of the '50s were well advanced, as might be expected with so many designers, machinists, assemblers and other craftsmen from the war machine.
Horex had SOHC parallel twin engines that could pass for '80s Japanese.
The Horex Regina sohc single was the likely inspiration of Honda's first "big" bike, the 250 Dream SA, although the Honda used a chain driven cam (like the Imperator twins) instead of bevel towershaft.
Horex 400 Imperator cafe with Ducati Sport tank and seat, and HUGE Munch front brake. Almost no room for spokes.
Another fun fact about the Yamaha 650 twins. If you go and buy top end parts for your Toyota GT2000, you will find they have a Yamaha parts number. Yamaha designed an engine with dohc, for Nissan, who turned it down, in favor of their own sohc engine of 240Z fame. So Toyota picked it up.
Talk about unsprung weight!
Is it magnesium or aluminum?
How does it compare with dual disc brakes with calipers (non-USD forks)?
More important was how well it compared with other front brakes of the day?
It sure has the looks!
The Munch brake hub and panels were cast of a magnesium alloy called Elektron, so maybe not too heavy. It had a 252mm liner diameter, so the hub casting may just look more massive than it really was. I think the Ceriani and Grimeca 4LS and Oldani 2LS were 230mm, the large 4LS Fontana was 250mm, and the Yamaha 4LS was 260mm.
Friedl Munch designed the brake for his 650 pound Mammuts, and that was asking a lot of it. My guess is the Ceriani and the Yamaha are the best quality, but nothing compares to the power and predictable feel of modern discs.
So was this the original inspiration behind the modern 'cafe racer'? I've seen a lot worse looking new builds grace these pages
It has key style pointers;
No front mudguard
Single seat almost brown
Needs pipewrap though.....
Air cleaner boxes need to be removed to be a REAL cafe racer, can't see through it.
Also, that rear rim is a little out of true. Probably won't notice it though.
Horex you say?