Tuesday, March 12, 2013

third time lucky...ah, fourth time maybe...

shinya giving his full attention to milling machine. since morning...


til night. actually he has been working on this since monday.


in fact, these are disapproved ones...he wasn't satisfied with them. and now he's making the fourth front brake caliper for the beemer :)


at time like this, shinya takes a walk to the coffee house with his favorite book in his hand. 


looks like the fourth one made him fully satisfied :)


clean up the mess and sweet dreams, shinya!


* i've posted last wednesday's "goodbye niimie and goodbye W..."here below.

* 先週の水曜日、「バイバイN美氏また今度、さよならWタナベ氏また来年。え?来年?」ココを下の方にポストしましたのでチェケラッキョ。

1 comment:

emil said...

This R90S is fitted with a type 247 engine, otherwise known as an airhead. The engine is an OHV, two valve per cylinder, air-cooled flat-twin, or boxer engine. The R90S weighs 215 kg (470 lb) and has a five-speed gearbox with a shaft final drive. The R90S was introduced with the new BMW "/6" series along with another new model the R90/6. The R90S and R90/6 were introduced in 1973 along with the revision of the already existing 600 cc and 750 cc bikes that were now called R60/6 and R75/6.[3] The earlier R50/5 of the "/5" series was dropped.
There were three series of R90S:
model year 1974: September 1973 to August 1974 (6,058 units)
model year 1975: June 1974 to September 1975 (6,413 units)
model year 1976: August 1975 to June 1976 (4,984 units)
The first series of R90S sported a distinctive two tone paintwork (Black/Smoke) called "TT silberrauch" or "TT smoke silver" with adhesive gold pinstripes, which later changed to hand painted pinstripes.
The R90S sported a small but effective factory-fitted Bikini Fairing, which held two dial instruments (clock and voltmeter) in addition to the normal instrument binnacle's speedometer and tachometer. The first series R90S was only equipped with a 238 watt alternator, while the other "/6" machines had at least a 280 watt alternator). The third series R90S alternator was upgraded to 250 watt.
The bike also possessed an adjustable hydraulic steering damper activated via a knob located on the steering head. Suspension is by telescopic forks at the front and twin shocks at the rear. The rear dampers were adjustable for preload, which is the only suspension adjustment available. The R90S came equipped with standard 38 mm Dell'Orto 'pumper' carburetors, differing from the previous 26 mm Bing slide carbs or 32 mm Bing CV carbs of the standard "/6" and "/7" 800 cc, 900 cc and 1000 cc series machines. Later 1977 to 1980 1000 cc machines sported 40 mm Bing CV carbs. The R90S differed from the R90/6 by sporting a 9.5:1 compression (R90/6 was 9:1) and 38 mm DellOrto round slide carbs instead of the 32 mm Bing CV carb on the R90/6.
There are numerous differences on the three R90S series. On the first series the brake discs were not drilled and the handlebar switches are the old "/5" series style. The first series was also still equipped with a "/5" series kick start lever and the front axle diameter is smaller than that of the second and third series.

Kind regards, Matthias