After years of riding my bita '90 "Corse for the street", I finally found the last piece to complete her- a '90 Corse swingarm. In truth I already had it but I had it on a '93 AMA Ferracci customer bike and have been looking for the correct '92/'93 Corse swingarm. Mathias had one and I bit the bullet and bought it. With a minor repair, I was able to put the correct swingarms on the correct year bikes.
Here is a bit of a catch-up. I always wanted to build a Corse for the street. For years I rode my SP2 with as many Corse bits on it as was practical. All carbon factory bodywork, Corse frame/wheels/brakes/airbox/carbon air intake. I ran the SP2 harness so I ran the stock headlight using a bracket I fabricated to hold it between the carbon ram-air intakes. It looked stock but was light and nimble. The SP2 motor was stock so it was a bit week on the low end but would still pull wheelies at 6 and 8K with WOT in third gear. Still not as much fun as a full Corse motor with G cams- but still had that very smooth feel that all Corse motors have.
I finally returned my SP2 to stock and sold it two years ago. I enjoyed my Corses on the track and love how they feel, so I wanted to make a full-press effort to use many of my spare Corse parts and build one that I could ride on the track-- and with a quick strip-down of street parts, ride it on the track.
This was more of a project/challenge than aiming at making a new daily rider--- my broken back has finally caught up to me and I had to give up riding on the track in 2014 and really can no longer ride in the full tuck position on the street any longer. In full disclosure- my daily go-to rider is either my 1946 vintage Indian Chief (now with an electric start to keep me from kick-starting) or my 1941 Indian four. I did not see that coming- but old age does require change of heart if you love to ride.
Corse motors and their parts are getting way too rare so I had to make a choice here--did I really want to go full-on Corse or to compromise on the motor not a being a real Corse. In the end, I kept my spare Corse parts on the shelf and went with a nice 955 build using an ST4 case. All of the internal gears are machined/polished to Corse specs, 748 gearbox, Corse shift drum, Pankel rods, knive edged/polished Falcon 888 crank, built/flowed 888 heads, SPS cams, and High compression pistons
A pretty run of the mill motor compared to what other forum members have built- but it keeps with the old-school feel that I wanted to achieve.
I installed a Corse harness and fabricated a separate harness to run the starter/brake lights/headlight/and turn signals.
In order to keep the stock look, I cut down a stock headlight glass and used an LED halo ring and a LED dome light to supplement the high intensity LED offroad floodlight I mounted to the lower triple tree.
I fabricated a carbon fiber base that attaches to the front of the ECU to hold the LED halo ring and dome lights.
I know most of you who go this route will go with the cleaner small round bullet high-intensity lights, but I have never liked that look even though I really like them on some of the endurance bikes and early Yamahas and Bimotas. For me, the stock rectangle looks best.
For the street, I used all of the mag bits but not the water pump cover. I did use the mag cover on my SP2 for a few years and that was a big big mistake because even though I used Evans coolant which was guaranteed to be compatible with magnesium- it ate a pinhole leak under the impeller and made my case oil a milkshake. It took many flushes to make it right.
So I machined a stock aluminum 888 cover to receive the Corse/Mercedes sensors and accept the 150-watt alternator.
I probably have forgotten many other bits I did to make this an old-school Corse for the street.
Here are a few photos of it stripped of its bodywork to give you and idea of how it stands at the moment
