Which 650cc twin to choose for ProTwin or F3?

[CHOPPA]

Seen we are dreaming why not just put the er6 in a suter chassis..... Id race that!

[CHOPPA]

Actually a zx6r handles pretty well, you would think it would be easy enough to ezz the 650 in. Im sure Glen has thought about putting the SV in a GSXR. Are they too heavy or something or just not suitable?

[codgyoleracer]

Actually a zx6r handles pretty well, you would think it would be easy enough to ezz the 650 in. Im sure Glen has thought about putting the SV in a GSXR. Are they too heavy or something or just not suitable?

Yeah, waaaay to heavy. Class leader is Tigcraft at mid 70's hp & 100kg ish weight.

Thats pretty hard to match with either ER6 or SV, although Er6 offers greater amount of doner frame options, road based items mostly being all to heavy and with commuter geometry.

[Urano]

After seeeing the results of the 650 twins class at Isle of man, top 16 are kawaski ER6's,

'cause er6 engine is bloody good. torques low and screams pretty high for a twin.
it doesn't drink so much even...

all the probs that the er6 has are not related to the engine, but to a really cheap budget minded dynamic part: swap the fork and the swingarm, change the dumper and the brakes and you'll have a great bike.

then, if you can keep just the engine and put it in a proper frame...

[Drew]

Your level of stupidness never stops amazing me Drew. Of all the frames you could chose why the hell would you chose a near 20 year old ill handling shitbox like that when you could use an RS250 or tz etc

Because the ER motor is quite wide, and wouldn't fit in an RS frame, it possibly won't even fit in the RGV frame, and they are quite wide between the frame spars to accomodate the air box.

Who's stupid now old man?

[SWERVE]

As if kwakas dominating at IOM twins class isnt enough............... check out Triumph at last round of British Supersport at Snetterton..................

[GSVR]

Because the ER motor is quite wide, and wouldn't fit in an RS frame, it possibly won't even fit in the RGV frame, and they are quite wide between the frame spars to accommodate the air box.

Who's stupid now old man?

Talking F3 it comes down to budget and what the rules let you get away with so why would anyone piss around with a ER6 when the Aprilia 550 is legal and is about half the size and weight and makes more power.And the frame and every thing else can be a custom anything you want right?

As for Pro twins here in NZ it is a feeder low budget class any mods are purely for safety/practical reasons just to get a sport/commuter bike race prepped.

The Irish and TT rules are a mix of the two above to keep the class (cheap) ie around 12.000 pound to build a bike.

[Drew]

For pro twins, I'm surprised no one has found a damaged cagiva raptor. Decent brakes and cartridge forks.

[GSVR]

For pro twins, I'm surprised no one has found a damaged cagiva raptor. Decent brakes and cartridge forks.

Don't think Cagiva sold enough 650 Raptors to get homologated. Is it on the list?


http://www.fischer1.com/specs.htm

[HenryDorsetCase]

Because the ER motor is quite wide, and wouldn't fit in an RS frame, it possibly won't even fit in the RGV frame, and they are quite wide between the frame spars to accomodate the air box.

Who's stupid now old man?

I've an NC30 rolling chassis (well its not rolling yet but it could be with a weekends work) if someone wants to measure it up. Or put an ER6 motor in the post to me.

[HenryDorsetCase]

For pro twins, I'm surprised no one has found a damaged cagiva raptor. Decent brakes and cartridge forks.

All the ones of that I have seen have been really expensive

[Shorty_925]

Then there's also the Hysoung 650 option as well.

My SV is great. I thought about an ER but a SV come up at the right time instead so went with that. Though in Ireland seems the ER's are the way to go.

Theres Mintwin racing in the UK : http://www.minitwins.co.uk/rules/rules2011a.html

And loose Supertwin rules : http://www.realroadracing.com/forum/...6b08ed2cdefc0e

And a Supertwin SV for sale : http://www.jhsracing.co.uk/mini_twins.htm POA sounds cheap....

[Gremlin]

Then there's also the Hysoung 650 option as well.

I think I saw somewhere that Hyosung is looking at the viability and interest in running a 650 class in the same format as their 250 class here.

I would imagine it would then make a very good choice, as it would be eligible for pro-twins as well?

[Shorty_925]

I think I saw somewhere that Hyosung is looking at the viability and interest in running a 650 class in the same format as their 250 class here.

I would imagine it would then make a very good choice, as it would be eligible for pro-twins as well?

Yes saw that part in the AMCC newsletter. If the rules for the two are the same then no reason why they couldnt cross over.

[SWERVE]

Yes saw that part in the AMCC newsletter. If the rules for the two are the same then no reason why they couldnt cross over.

Just a way of selling more Hyosungs as race bikes......... only way to make that viable is to set up a one make series. They are eligible for protwin as they are 250 production.... as for contenders for those champs........ need one hell of a rider..............
Ask Jay how hard he had to peddle his Hyosung a couple of years back.