Upswept SF Silencers?

[ksoholm]

Can anyone identity what the exhaust system is on the attached photo? I like the upswept look. Looks like Conti cans, but what about the headers and mounting brackets? Custom?

Thanks -

Kristian

 

[Paul Marx]

Brackets are drum brake SFC.

Paul

 

[motoddrob]

Probably custom, wouldn't tale a pipe bender long to replicate those. As for te SFC brackets? But then again it wouldn't take long to cut out that shape from some 8mm ally plate

 

[ksoholm]

Thanks guys - come to think of it, I'm not keen on cutting the stock rear peg mounts.

 

[motoddrob]

Mount the upswept contis off the original triangular bracket. It's all doable.

 

[piranha-bro2]

It?s possible to get more upsweep than std but with the frame triangle and the headers running outside the side stand and with stock centrestand it?s tricky to get the sort of effect shown in the pic. And the setup in the pic would have the headers dragging pretty badly in corners if you like using SFs for what they?re very good at.
If you lose the sidestand and modify the centrestand a la SFC you can get plenty more upsweep.

 

[Ernesto]

I assisted on building that bike.
The ex-owner had the headers made
fom stainless steel. Pic shows another
friend's replica with the same headers.

Ernesto

 

[Dellortoman]

I reckon it would sound nice with the Contis. Years ago I knew a bloke who put a set of Contis on his BMW R100S. The Contis even made that slug of a bike sound good. 

 

[Vince]

One of the best sounding bikes I ever heard and I know it's hard to believe was the Drum Tobacco sponsored Eco built, apparently a famous BMW shop in Melbourne BMW Bears racer. A mate was having his BMW served at the now gone BMW tech shop at Rydalmere and while chatting to the owner I mentioned how I loved that bike's sound. He took me to the showroom and there it was, he had bought it. It had a fantastic note from its exhaust

 

[Tippie]

Ecco Engineering was an engineering shop in Melbourne run by Graham "Gyro" Carless. He had been a mechanic in Elizabeth Street, iirc he actually did a stint at Stanco. He was an excellent engineer/mechanic with a penchant for BMW, making disc conversions for drummers, tuning stuff etc all one-off for mates BM?s, and maybe some cast alloy wheels. His Ecco BMW racer was ridden by Ken Blake in what became superbikes, it was a rocketship. He built The Syndicate superbike that Ajay raced successfully. It wouldn't suprise me if he had been involved in the Drum BMW that Martin Hone raced (who later raced the RGS TTF1).

 

[sfcpiet]

Air-head Beemers can be made to go seriously fast.  Their light weight compensates for a lack of power.  But nevertheless, 100hp from 1000cc isn't too hard to achieve, long-term reliability does suffer though.

A mate built a track Beemer from scraps and e-Bay bits, went like stink.  A good 95 hp/105Nm paired with 160kg, a nice recipe.

Road Beemers are quite deceptive.  May feel slow because they're so comfortable, but a determined rider can get them really moving.  My first, and last, competitive road-racing outing was on a Krauser 4-valve-equipped 1000cc Beemer at the 1000km Hockenheim reliability trial.  70 laps of the old 7km course (2 riders@70 laps each, before Cam comes up with his hair-splitting maths...    After that, a sprint race over 20 laps of the short 2.4km course)  in the rain, wasn't too much fun.  But the bike went surprisingly well, hitting well above its weight in the twisty bits.

piet

 

[Vince]

There was an interesting thread in Adventure Rider about Krauser 4-valve heads a few years back, apparently, they had a reputation for being unreliable and not a good thing. Lots of discussion before an apparent fix was revealed. That frame was also discussed. I love to hear about oddball bikes and the nut jobs who persevere building and improving them.

 

[IAG]

I love to hear about oddball bikes and the nut jobs who persevere building and improving them.

Did you just describe the forum?

 

[laverdas]

Got a pair of contis on my R90s  which let's the motor breath and sound ace.
Merry crimbo Andy

 

[bazzee]

I once saw a BMW R75/6 near Kensington Kindy which had Dunstall Decibels, it was very fruity!

cheeeers,

bazzee

 

[ksoholm]

Thanks for all the input, fellas -

Funny, an R100 airhead is what's next for me. Superb bikes.

Kristian

 

[natm]

I have an R100 and a SF3, hard to tell which is quicker, maybe the beemer with the extra cc's. The SF3 definitely handles a lot better but is a much harder ride and vibrates more. The BMW is so comfortable and smooth but no slouch either. I use the BMW for long runs, especially when a lot of luggage is involved and the Laverda for those fun days to put a smile on my face.

 

[Paul Marx]

Do you spend your time riding around the block?

Paul

 

[CLEMTOG]

there is a lot on that SF3 that makes me think that it was formerly owned by me, but then again it is very stock, smaller marks, eg chain guard are doing that, maybe just the chain guard is ex me, fork gaiters, front brake hose too long, bars and bar end mirror etc, how long have you owned it and what do you know of its history?
CLEM

 

[Jo]

Thanks for all the input, fellas -

Funny, an R100 airhead is what's next for me. Superb bikes.

Kristian

Hello Kristian,
Friend of mine build up a R100 - although badged as 'R90S' it's a 1000cc with modified front fork (from early K-Model incl. 18" wheel). Engine has received some TLC too and proofs for healthy 70+ HPs - so altoghether a pretty fast youngtimer:

Cheers
Jo