Topic: An unusual workshop clock

[bear]

I thought you blokes might be interested in my mates workshop clock.
It's a TZ powered dirt track sidecar.
This bike won the Queensland,  New South Wales, Victorian, Tasmanian and Australian titles in 1982.
It's hard to believe that was forty years ago.

[grcamna2]

I thought you blokes might be interested in my mates workshop clock.
It's a TZ powered dirt track sidecar.
This bike won the Queensland,  New South Wales, Victorian, Tasmanian and Australian titles in 1982.
It's hard to believe that was forty years ago.

A nice custom shop clock for sure Bear 
What size Yamaha TZ is the race bike ?

[bear]

Well it raced as a 500 in this bike.
The motor originally powered a TZ750 road racer.
The bike was involved  in a fatal crash at Bathurst and to my shame I can't remember the riders name.
It was owned by one of the big Yamaha dealers so they bought a new replacement factory motor because the crankcases where damaged beyond repair.
Garry my mate bought the remains of the motor and fixed the cases as best he could.
So it ran two TZ750 cylinders with open ports @ 175cc each on the left side and one cylinder from a TZ250 with reed block ports @ 125cc on right side.
So effectively the motor was converted from a four  cylinder to a three cylinder.
The port configuration may have been the other way around. My memory isn't what it used to be.
It sounded  like a bag full of cats fighting but it went like stink.

[grcamna2]

Well it raced as a 500 in this bike.
The motor originally powered a TZ750 road racer.
The bike was involved  in a fatal crash at Bathurst and to my shame I can't remember the riders name.
It was owned by one off the big Yamaha dealers so they bought a new replacement factory motor because the crankcases where damaged beyond repair.
Garry my mate bought the remains of the motor and fixed the cases as best he could.
So it ran two TZ750 cylinders with reed block ports @ 175cc each on the left side and one cylinder from a TZ250 with open ports @ 125cc on right side.
The port configuration may have been the other way around. My memory isn't what it used to be.
It sounded  like a bag of cats fighting but it went like stink.

I imagine that rig must have hauled a$$  How heavy was the 'monkey' hanging off the edge ? A big guy ?

[bear]

Well it raced as a 500 in this bike.
The motor originally powered a TZ750 road racer.
The bike was involved  in a fatal crash at Bathurst and to my shame I can't remember the riders name.
It was owned by one off the big Yamaha dealers so they bought a new replacement factory motor because the crankcases where damaged beyond repair.
Garry my mate bought the remains of the motor and fixed the cases as best he could.
So it ran two TZ750 cylinders with reed block ports @ 175cc each on the left side and one cylinder from a TZ250 with open ports @ 125cc on right side.
The port configuration may have been the other way around. My memory isn't what it used to be.
It sounded  like a bag of cats fighting but it went like stink.

I imagine that rig must have hauled a$$  How heavy was the 'monkey' hanging off the edge ? A big guy ?

No, Russell (passenger)wasn't a big bloke, maybe 65kg.

[simon#42]

well i have made a few 500s by adding a cylinder to a tz350 but never by taking one off a 750 !
i can never decide if sidecar racers are great lateral thinkers or are rough as feck mechanics . oh on second thoughts  i can !

[bear]

[quote autho ;Dr=simon#42 link=topic=191586.msg2230571#msg2230571 date=1672584874]
well i have made a few 500s by adding a cylinder to a tz350 but never by taking one off a 750 !
i can never decide if sidecar racers are great lateral thinkers or are rough as feck mechanics . oh on second thoughts  i can !
[/quote]

  I think your probably right on both counts Simon.But while you flash slide rule wheeling mech/engineer types might produce a more refined machine, us yobs with our cold chisels and hammers still have our place in the world as well.

[simon#42]

i would hate you to change !

[Tracksnblades1]

I can smell the two stroke smoke…😇
Nice clock and tribute..🎯

[bear]

I can smell the two stroke smoke…😇
Nice clock and tribute..🎯

OH .....It's better than that.
We're talking Castrol M and Methanol.

[PeWe]

I can smell the two stroke smoke…
Nice clock and tribute..

OH .....It's better than that.
We're talking Castrol M and Methanol.

I know that smell! Castrol Mmmmmm!
Model airplanes, early 70's. We added nitromethane too.

I started my moped with that fuel.
Full rpm despite no throttle more than idle. 20% nitro, 10-15% oil, rest methanol changed its behavior.

It ran fine when I tried to kill it pulling spark plug cap. No difference. After some wrestling in panic it finally stopped.

[grcamna2]

I can smell the two stroke smoke…
Nice clock and tribute..

OH .....It's better than that.
We're talking Castrol M and Methanol.

I know that smell! Castrol Mmmmmm!
Model airplanes, early 70's. We added nitromethane too.

I started my moped with that fuel.
Full rpm despite no throttle more than idle. 20% nitro, 10-15% oil, rest methanol changed its behavior.

It ran fine when I tried to kill it pulling spark plug cap. No difference. After some wrestling in panic it finally stopped.

Did you take that moped(Sachs?)for a 'speed run' while running hat powerful fuel ? !! 

[bear]

I miss that smell.
We would use a cap full of M in our four stroke fuel as well.
Just to stop the carb slides from freezing up.

[PeWe]

I can smell the two stroke smoke…
Nice clock and tribute..

OH .....It's better than that.
We're talking Castrol M and Methanol.

I know that smell! Castrol Mmmmmm!
Model airplanes, early 70's. We added nitromethane too.

I started my moped with that fuel.
Full rpm despite no throttle more than idle. 20% nitro, 10-15% oil, rest methanol changed its behavior.

It ran fine when I tried to kill it pulling spark plug cap. No difference. After some wrestling in panic it finally stopped.

Did you take that moped(Sachs?)for a 'speed run' while running hat powerful fuel ? !! 

It was an old ILO. 3 gear hand switch, model 1957.
The nitro methanol run in garage only.
That moped got a 3 geared Sachs shortly after. 60cc, better carb and exhaust.

Could leave the Police cars when hunting me on pathways for pedastrians and cyclists.

But it happened that we used the castor oil in our mopeds for the nice smell.

[grcamna2]

I can smell the two stroke smoke…
Nice clock and tribute..

OH .....It's better than that.
We're talking Castrol M and Methanol.

I know that smell! Castrol Mmmmmm!
Model airplanes, early 70's. We added nitromethane too.

I started my moped with that fuel.
Full rpm despite no throttle more than idle. 20% nitro, 10-15% oil, rest methanol changed its behavior.

It ran fine when I tried to kill it pulling spark plug cap. No difference. After some wrestling in panic it finally stopped.

Did you take that moped(Sachs?)for a 'speed run' while running hat powerful fuel ? !! 

It was an old ILO. 3 gear hand switch, model 1957.
The nitro methanol run in garage only.
That moped got a 3 geared Sachs shortly after. 60cc, better carb and exhaust.

Could leave the Police cars when hunting me on pathways for pedastrians and cyclists.

But it happened that we used the castor oil in our mopeds for the nice smell.

Excellent !!! 

[Tracksnblades1]

I can smell the two stroke smoke…😇
Nice clock and tribute..🎯

OH .....It's better than that.
We're talking Castrol M and Methanol.

Is that worse than Caster927 oil.. ?   Following a bike burning 927 your always wondering  whether it’s got a battery leaking acid in the mix…😜

[PeWe]

Burned Castrol M smells almost as tasty as a bakery baking Doughnuts somewhere, just follow the smell!

[johno]

referring to the above comment on the passenger size; the best size passenger is a little guy with big balls 

[bear]

I didn't care how big their ball's where. Just as long as they where hanging over the edge of the platform. 

[scottly]

Who needs balls?? BTW, the pilot's nickname was Bear.

[RAFster122s]

Better have balls if you were gonna be Bear's monkey as a hard charger isn't gonna survive without someone hanging out there to keep things on the level...

[PeWe]

How fast was the normal top speed back then with those bikes?
CB750 engine makes it even more interesting

[bear]

Who needs balls?? BTW, the pilot's nickname was Bear.

With a name like that he must have been a good bloke then Scott.

And while we're talking about Bear's.
Last month I got my mascot back eleven years after losing it.

Many years ago the girls where out shopping on one of our trips away racing and found a small stuffed "Kung Foo Panda". So they bought it and taped it to the inside of my fairing.
After my accident in 2011, one of the flag marshals was cleaning up the bits of bodywork that had been spread across the track and found our bear still strapped to a peace of our fairing.
So he gave it to one of the Tasmanian riders at a practice day a couple of months later and told them the story. To cut a long story short, the tail and the bear got past from hand to hand over the next eleven years until it found it's way to the Australian Titles at Morgan Park in Queensland. It was finally given to a mate of mine and he dropped in on his way home to Victoria and gave it back to me last month.
So here's our bear.    
 

[bear]

Better have balls if you were gonna be Bear's monkey as a hard charger isn't gonna survive without someone hanging out there to keep things on the level...

I'm not sure if they need ball's David, but they do tend to have a lot in common with drummer's, at least that's what I've noticed over the years.
Most of them tend to get "Socially Excited" if their out in public and need to be kept on a short rain.D

[bear]

How fast was the normal top speed back then with those bikes?
CB750 engine makes it even more interesting

I'm not sure Per. I wasn't punting these things around in the early seventies and they only had a short run at the top. They where replaced by Yamaha TZ and twin cam four stroke motors.   
At Phillip Island we have been clocked by the trap at 240km and we don't button off until we are a good 100meters past that point.
It was the only time I can remember not having a headwind there.   
It all  comes down to the gearing though.