Search results

Just thought his snippet of info should be out there. This is for UK and European engines only, which have 533 con rod length ( 140mm centres) this is NOT applicable to 447 or 256 engines Yamaha are as we know great lovers of repeatedly using the same dimensions on their bikes, I have a 2020...

I found this dyno sheet when i was tidying up the external hard drive the engine is one i built for Steve Mann CRMC sidecar racer, this is about 6 years old now, the lower trace is using a Megacycle 25-020 cam, the higher trace is a Smedspeed 2.5 cam, which is the same cam but with some...

I built an engine many years ago for a friend who worked ( then) for Alistair Caldwell, McLarens manager back in the James Hunt F1 days. He has since moved on. His name is Joe, and he is the BEST welder i have ever seen, he built up the crankcases on my Ironhead Sportster, so we could bore them...

SOLD, SOLD, SOLD I built this for me over a long period of time, it is an 880cc big bore using Wiseco 87mm pistons , it is also 277 degree rephased XS650. In the time in ran Smedspeed, i had a few 880s to build, so to make sure the process was good, i built one for me too. An enormous amount...

This thread wont be of interest to many, but as I ( with my two other compatriots) have designed a set of valves for big racing engines, I thought I may as well tell everyone. BIG engines, i.e. 840 and 880cc, start to run out of breath at high rpm even with the biggest easily obtainable valves...

Good morning to you all I have previously posted the dyno results from our rephased 880cc engine we built for sidecar road racing. The engine design and build has been undertaken as a collaboration between Howard ( ex Smedspeed) Steve Mann and Rick Forte. To date we have achieved 90hp rear...

This racing season was short for us, only four races. In 2020 we fielded an 880cc rephased XS650. Raised inlet ports, larger valves, 87mm wiseco pistons, and new design cam, ductile iron liners and other parts designed by me. The engine goes well, we had it dyno tested at Richard Albans TTS in...

Smedspeed 277 rephased cam for sale. type 3 ( a 277 degree copy of a Megacycle 250-30 cam) right side leads left. A NEW billet steel cam, excellent cam for 750 engine, MUST have more compression than stock to work well. too much cam for a 650 new cam, no sprocket £215 + P&P ( UK only) it is...