I've been reading up on the Euro4 regulations and the stronger ones coming after and it seems a lot of the major producers are strongly considering cancelling their 600cc supersport bikes.

Anyone who is up to speed on the motorcycle world know if that's just smoke and mirrors or if it's really going to happen?

The powers are fully intent on legislating everything petrol and diesel powered off the road

Yamaha updated the R6 last year which I think complies with the Euro4 thing, not sure that the other big 3 manufacturers have a new 600 Euro4 bike in the system, another point of linked info is that the 2019 Moto2 supplied / control engine will be a Triumph 765cc triple unit but at the same time Triumph have axed the Daytona from manufacture because the older 675 motor didn't meet Euro4 .. Honda have supplied the previous motors since Moto2 started so i'm guessing they don't see any future in 600's.

If the manufacturers make 600 machines redundant, it raises the question of what will replace the 2 supersport races.  Another two london 360,s might suffice but it would tilt the event to ward superbike spoil.  

kilbil

It may survive another couple of years at a push, if/after they stop making them.

Maybe moto3 machines will appear as a re-introduction of the Ultra Lightweight class, although as everything seems to have to be pre-fixed 'Super' I'm not sure what they would call it.

There are also those Supersport 300 things that have been running at WSBK, not sure if they'll catch on, and aren't likely to be the most exciting things to watch on a fast circuit.

I am not a fan of the current schedule of 600 and 1000 Supersport/Superbike, so I think it would be great to have Moto3, Moto 2 , Superbike and all out Senior.
The current setup makes it easier to win multiple TT's than times gone by.

Most of the bike I see on the streets hereabouts are 300 ish size so it would seem like the way forward to have this as a class.  I always enjoyed the lightweight classes and appreciated the lightweight specialists - so I'd like to see it.

A Ultra-Lightweight class should be reinstalled. It's a classic tt-title. Also it should be made clearer what is the Junior TT. It does exist still, does it? More variety would be great.
As I understood the Manx GP is going this way and will have SSP 300 and Moto 3 races this year. I'm looking forward to this. Moto 2 would be great as well.

(07-06-2018, 09:06 PM)warrior Wrote: It may survive another couple of years at a push, if/after they stop making them.

Maybe moto3 machines will appear as a re-introduction of the Ultra Lightweight class, although as everything seems to have to be pre-fixed 'Super' I'm not sure what they would call it.

There are also those Supersport 300 things that have been running at WSBK, not sure if they'll catch on, and aren't likely to be the most exciting things to watch on a fast circuit.

They'll call it 'Super Lightweight', no doubt.

Have been keeping a close eye on what is going on with regards to the 600,s.
Only Yamaha have made a new model to meet Euro 4 regs,
All the others have not imported any new bikes into the UK as far as iam aware to meet this spec,

The biggest problem, that I can see,
Is what is going to happen to the sidecars at the TT,
With no new engines about ?
There's only so long you can push these to the limit at the speeds they are doing,

And what would replace them ????

36 sidecars only this year,

Which is not looking good for them, Which would be a great loss to the TT !

Oh no, I didn't even think about the sidecars.
I know the sidecars aren't the biggest draw but I love those things.

The engines will be around for years though I'd imagine

I'd think parts should be available for some time, when I was employed in bike sales/servicing on the rare occasion we had to supply/fit a complete engine via factory warranty we had to order/buy every single component individually and build the engine from scratch, the parts were always readily available but it wasn't possible to buy a complete engine even as a franchised dealer, having a complete engine would have been more cost effective too labour wise for everybody with warranty purposes, having said that I don't know how long parts have to be made available for retail after the original inception date for the model.

When you consider the F2 sidecars only really arrived on the scene using TZ350 motors around the time we had all stopped running TZ350 solos, Yamaha had stopped selling complete bikes after 1981 but parts were still available to build motors, and the F2 lads went on using those motors for another 10 years or so, with plenty of parts still available.

So there should be enough 600 bits around, particularly spread over 5 different manufacturers, to see the chairs through a good few years post Supersport 600.

Spot on Warrior, parts were still available for the TZ 700/750 motors too, many many pre tt early morning hours late nights spent at Roger Keen's Aston Clinton workshop preparing 350/700/750 motors for solo/sidecar customers, myself and mates they did about 5-600 miles before a rebuild so we got through loads of parts.

Also they aren't giving up on 600cc bikes it's just SPORTS bikes, I'm pretty sure you could just throw a tuned up FZ6 or a Bandit 600 engine in. They are actually proposing replacing World Supersport with a "Naked" bike series using bikes like that.

A lot more work involved in getting them up to speed as a lot of the nakeds are in a much lower state of tune than there equivalent sports models