hehehehe..............whaaaaat leave it stock! ya dreamin.Well after all this, please excuse my ignorance.
Are the engines all stock (factory built to purpose) or do the teams hot them up?
Your right, but that's all we had to go with here in the 70's. However I designed this sidecar not with 1/4 mile circular speedway tracks in mind at all, but with long straights and very high speed corners as only a 1 mile or 1/2 mile long flat track can give you. There were some twin cylinder solo bikes entering in the flat track races back in the day, similar to the american flat trackers, but mainly JAP, Jawa, CCM with suitably modified frames to cope with the much higher longer flat track speeds. Admittedly, back then most of the bikes were modified speedway bikes, that's pretty much all there was around and it was called Flat Track racing on the longer tracks here.??? ......... looks like a Speedway outfit to me.
I never knew we had Flat Track, in Australia and NZ.
Here’s Len Diggins grass H2 750 grass bike- I never rode it but was a scream!When I was a 2nd year Boilermaker apprentice in 1977 I completely designed and built a Kawasaki H1 Flat Track sidecar outfit. This was to compete in the junior class ( 500cc) mile and half mile flat tracks in South Australia. The "Morgan Mile" "Tailem Bend half mile" and "Port Pirie half mile" tracks. I designed the expansion chambers for a fairly narrow power band around peak rev limit. Once on song it was crazy fast, and handled pretty well considering it was my first attempt at making one of these sidecars. Raced those tracks for quite a few years, had 3 spare engines ready to go in those days, Then sadly work got in the way and I did not have the time to keep it going. Boring ? No way, one of the most exiting things I have done.
Are you sure ….You are comparing apples to aubergines. On a speedway track yes. It would be the other way around on a 1 mile dirt track.
Both types of racing are boring to watch on TV ..... for me anyways! Watching them in person is another experience altogether! Speedway has such amazing short range acceleration (I don't know what else to call it) and flat track has unbelievable corner speed.
…
Was like that in South Australia in the 70s modified speedway bikes on mile an half mile tracks. Super lightweight and single cylinder drive on dirt.Are you sure ….
In Brisbane there is a one-mile track still in use today. It's called the Deagon Racecourse.... Different track lengths, with the Holy Grail being 1 milers.


Are you sure ….
I dunno, record average speed 90mph (144.6kmh) set by a Ivan in 1986 still stands..Very, very cool!
Where are all the American flat trackers he is running circles around?
Jim
Thanks Dave, I need to get out more and pull my head in a bit.... I’m an old git.Here's the Aussie version CK........ Dirt Track
Everything was huge until bat flu hit Vince........That was huge when it first started but I think Covid killed it. Everybody went including Jack Miller and all the oldies from my time watching racing.
Yes, has popped up a few times.Was this the SF tracker? It's nice looking build
Lima Laverda - Flat tracker
Sure this has been discussed before but the pics are worth posting anyway. Scrumpy http://sideburnmag.blogspot.com/2011/07/lima-laverda.htmllaverdaforum.com
I dunno, record average speed 90mph (144.6kmh) set by a Ivan in 1986 still stands..