Australian Thunderbikes

Kawasaki 750s are good things, but I would never road race one with a standard frame. My brothers uses the motor in an historic sidecar. The motor is on alcohol, and it has just too much go, you simply cannot use it all. He has another outfit with an H1 motor which will do a ll you ever need. He won the Australian Long Track Champions hip in 2001 against a ll the modern outfits with the 500cc Kawasaki. Here is the 750:

You might enjoy seeing this. At this meeting he flipped the Kawasaki 750 when it came on song and jumped into the back of another outfit which had blocked him. He won't permit me to upload that video:

http://www.youtube.com/watch?v=HYnXEQ0Aw1I

Good stuff, ta.
Back in the day in N.Z. a chap, [T. Bruin from memory], used to race a similar outfit, against the Buckley Vincent, Pratt Norton, et al, - he went to the extreme of trying a set -up used by the U.S. flattrackers [before the AMA banned multis], running the triple crank as 0 degree [all up,like a Norton but 3 firing as one, being a 2T] instead of 120 degree even firing, to get more grip, but it vibrated a bit too much & overstressed the primary gears also.

Just a thought acotrel, you could ask the bro if he minds that forbidden vid being uploaded to the "Classic simultaneous torque hit wheelspin/wheelie" thread in other classic bikes, as an exemplar...

J.A.W. said:

I was around the initial classic racing scene when it got going in N.Z., you`d know they totally excluded Japanese machines & the snobs wanted to exclude non-pukka roadrace bikes too, but settled for running their own classes instead, but some dont mind mixing it up, just like it was back in the day.
http://www.youtube.com/watch?v=i9vs-hn6 ... re=related

Click to expand...

It still does and in the open class I run in the 900SS and Commandos rule...
I went to the AGM the other day on the Commando....there were only two bikes there..... there was 'lively' discussion on the subject of short stroke Manx's not being ' in the sprit ' and keeping the racers period correct.
To me it seems the rules are a bit dated as the meeting was a sea of grey hair...... younger guys follow the Post Classics which are all inclusive.
I used to go every year but never really watched the racing, I just liked the atmosphere of a race meet where you could wander around the pits and chat to the owners and riders.
Now I'm on the track I don't have time for that.... :cry:
Are clubs in the US and OZ finding the membership is aging and no younger ones coming thru? Old Euro/Brit iron is getting pretty pricy to thrash on a track.

My feeling about Molnar and Walmsley Manxs is that it is much netter t o race those tha n deplete the genuine items. I believe there s hould be a 500cc (senior) thunderbike class w hich caters for any single or twin cylinder engined bike which has two valves per cylinder. In Australia we have period 3 500s, as well Period 4 and 5 500s which race separately in other races against two strokes and superbikes. It would be sensible to race Seeley G50s and SR500 Yamahas in the same class as pre62 Manxes and G50s and BSA Goldies. They all have the same developmental problems, same capacity, and number of gears in most cases . It is the purist idiots who have never really raced in non-historic classes , who get fixated on date of manufacture. It really isn't important, What IS important is the number of cylinders, and the number of valves per cylinder.
I suggest the best ever 500cc supermono could be built out of a Jawa 4 valve speedway engine, Seeley frame, and a TTI 6 speed gearbox. It would absolutely blitz a Molnar manx. There must be thousands of old Jawa engines lying around in Europe, and a brand new one is not costly - and even a BSA Gold Flash frame fitted with unit triumph fork yokes, would be OK !

So these guys do it all for their own satisfaction? Or do they sell the stuff?
http://www.irvingvincent.com/