Hello Frankster Yes, it is a new acquisition to try some 1/4 mile, 1/8 mile sprinting and speed records. Ellvington York, maybe Pendine but I would really love to take it Bonneville.
“Lil’ Red” 1980 CB250RS- Frame made by David Dunk in England using CB250RS seat tubes and steering head, Honda MB100 front forks. Ported and polished, balancing shaft removed, Wiseco piston, 10.5:1 compression ratio, Amal Mkll 32mm carburettor running 97octane petrol, Fuchs Silkolene 10W40 oil. 14T front sprocket and 42T rear. 1/4 mile 13.6s 98mph Looking to go 15T or 16T front sprocket for some flying miles.......
Well, strangely enough, seeing Gordon's little race bike reminded me that a certain Mr Murdo has a similar creation that he used to race and has since parked waiting for the right time to bring it out from under the covers. There's a picture of it somewhere on this forum. Gordon's beast is definitely well sorted. Any 2fiftycc 4-stroke that covers the 1/4 mile in 13.6 sec is not to be trifled with. It looks like it weighs less than 100kg, has low unsprung weight and has been built by someone who knows what they're doing (extended forks, tank in frame, engine mods etc). That would make a perfect nostalgia drag bike in Australia.
Thanks for the comments and likes. This bike was built in 1994 and was campaigned successfully by the builder taking several titles over the years. He did engineering work for the Severn Bridge so had the ability to design and the skill to build. I shall look up the Murdo machine and any other technical info re. CB250RS engines I can find. Well done to organisers of this site!
Hi Murdo Thanks. They say you have a similar machine. What is your experience of it and do you have a picture.?
Welcome Gordon... looking forward to seeing more on your projects.. one thing you will find here is that we are a friendly bunch.. I know.. most uncommon with forums but this forum is unlike any other out there... plenty of really skilled people (@Murdo is the leader) all enthusiasts and we all love bikes of all types and sizes. Personally.. I think this is far and away the best forum on the interwebs.. I am sure you will enjoy your time here..
Mine was built as a 'bitsa' from what I had at the time. Yamaha YZ250 engine fitted into a Suzuki TS185 trail bike frame that I had to lengthen by 150mm to fit the YZ. Runs Suzuki wheels, brakes and road bike tyres. I made the small tank, seat, battery carrier and front fairing. Only had one meeting with it and bike ran straight and true but I had wrong gearing and jetting and didn't set any good times. Better photo here (third picture down). https://2fiftycc.com/index.php?threads/murdos-museum.2000/
Crikey! You’ve got some beauties in there to dust down apart from the Yamazuki bitsa. I hope you charge admission to the public to see the display! I’ve always fancied a road trip on an eg. C90 across the Nullabor Plain to play that par 72 that you have there.
This is another one I made using Yamaha YB100 bits. https://2fiftycc.com/index.php?threads/summer-project.9240/