Which 650cc twin to choose for ProTwin or F3?

**Crasherfromwayback** · 28th May 2012, 19:55

Originally Posted by Grumph

First season was on Methanol/Toluene - the frame had to be strengthened before it could handle the 10hp or so extra on Nitro.
i rode it in practise for the GP and being a little (cough) heavier than Tony I could make it flex noticeably.....

My own one with Mark Taylor riding and on Meth/Tol was geared for 140 plus MPH on Wigram and was running into the rev limiter...

i still think that of the 3 "suitable" 650 twins the Kawa has the most potential.

lol. It was a VFR750 chassis too no? I was at Boyle Kawasaki at the time, and raced against Tony a fair bit. Still see him now and then. I sold him a Buell 1125CR not so long ago. And yes...I agree the Kawasaki would be the best engine to use.

**crazy man** · 28th May 2012, 19:59

Originally Posted by worm13

thats pretty slow for a 400 over sized to 750!

just a bit for a 750! dont no if you knew( fast by rob? ) but he had somthing to do with building my bike l got the bike of dennis oconel .spelt somthing like that

**crazy man** · 28th May 2012, 20:02

Originally Posted by codgyoleracer

But Andy's does 165 ?

but he has more cc than mine

**worm13** · 28th May 2012, 20:03

Originally Posted by crazy man

just a bit for a 750! dont no if you knew( fast by rob? ) but he had somthing to do with building my bike l got the bike of dennis oconel .spelt somthing like that

I thought it was head like swiss cheese by griffiths and hence why it was fast!

**worm13** · 28th May 2012, 20:05

Originally Posted by crazy man

but he has less cc than mine

I knew there was something dodgy going on!!

**jellywrestler** · 28th May 2012, 20:06

Originally Posted by SWERVE

Ask Jay how hard he had to peddle those extra couple of Stone he's grown a couple of years back.

fixed it for ya

**crazy man** · 28th May 2012, 20:07

Originally Posted by worm13

I thought it was head like swiss cheese by griffiths and hence why it was fast!

it did get changed around alot once l got my hands on it

**jellywrestler** · 28th May 2012, 20:10

Originally Posted by Crasherfromwayback

lol. It was a VFR750 chassis too no?

yep i went to my first Brass Monkey on that bike when it was a VFR too

**Crasherfromwayback** · 28th May 2012, 23:19

Originally Posted by jellywrestler

yep i went to my first Brass Monkey on that bike when it was a VFR too

Really? Funny. Racing against him and Robert at Masterton gave me my first (foul) taste of following methanol burning bikes. Got past Hippy easily enough...Robert was gone burger gone. That Ducati he rode was the only thing that used to beat up on me in F2 round the streets then. The bike was great...but we all know most if it's the rider! Fuck he clicked with that thing.

**jellywrestler** · 29th May 2012, 08:27

Originally Posted by Crasherfromwayback

Really? Funny. Racing against him and Robert at Masterton gave me my first (foul) taste of following methanol burning bikes. Got past Hippy easily enough...Robert was gone burger gone. That Ducati he rode was the only thing that used to beat up on me in F2 round the streets then. The bike was great...but we all know most if it's the rider! Fuck he clicked with that thing.

so in those days the Hippy was probably on a GPZ600 in the F2 Pete?

**Crasherfromwayback** · 29th May 2012, 08:36

Originally Posted by jellywrestler

so in those days the Hippy was probably on a GPZ600 in the F2 Pete?

No. He cross entered his GPZ500 as you could back then.

**neil_cb125t** · 29th May 2012, 19:04

Originally Posted by Grumph

OMG...talk about deja vu...just paint it pink while you're at it....kawa twin in a VFR frame...LOL...repeatedly.

Seriously, the hardest part to accomodate would be the airbox which is ferkin huge. I didn't have a close enough look at GW's bike but I suspect the frame is built around the standard airbox.

The 500 Kawas were doing around 140mph here in NZ back in the day.

Rs250 with a ER650 motor........ See here http://www.3upracing.co.uk/blogs/index.php?blog=2

We are working on a Er650 motor going into a different frame, the head of the ER aint wide at all - its teh Gearbox and crank area its HUGE..... The airbox is fine, we are even runing a std Gas tank that fits the airbox fine. The Airbox should be bigger - since i can't mod it.....

The biggest issue is weight.... these tings are not light... the er has weight everywhere - the ignition barrel is like nearly a kilo in its self!! So find a light frame thats wide at the bottom, light rims and get porting......

**crazy man** · 29th May 2012, 19:30

Originally Posted by neil_cb125t

Rs250 with a ER650 motor........ See here http://www.3upracing.co.uk/blogs/index.php?blog=2

We are working on a Er650 motor going into a different frame, the head of the ER aint wide at all - its teh Gearbox and crank area its HUGE..... The airbox is fine, we are even runing a std Gas tank that fits the airbox fine. The Airbox should be bigger - since i can't mod it.....

The biggest issue is weight.... these tings are not light... the er has weight everywhere - the ignition barrel is like nearly a kilo in its self!! So find a light frame thats wide at the bottom, light rims and get porting......

looks more like a home made frame to me

**HenryDorsetCase** · 29th May 2012, 20:01

Originally Posted by neil_cb125t

Rs250 with a ER650 motor........ See here http://www.3upracing.co.uk/blogs/index.php?blog=2

We are working on a Er650 motor going into a different frame, the head of the ER aint wide at all - its teh Gearbox and crank area its HUGE..... The airbox is fine, we are even runing a std Gas tank that fits the airbox fine. The Airbox should be bigger - since i can't mod it.....

The biggest issue is weight.... these tings are not light... the er has weight everywhere - the ignition barrel is like nearly a kilo in its self!! So find a light frame thats wide at the bottom, light rims and get porting......

How wide does it need to be across say the mount closest to where the front sprocket is?