Hi, new to this site but not new to owning the CB750 sohc. Got my first cb750 about 1980, had an 810 kit, got another one from a friend in 1986 for £250. It's an F1 P reg. I soon started updating it, first was F2 tank, forks etc and comstar wheels and CBX1000 discs/calipers (I used to visit the breakers on a regular basis, we all like a bargain)
This is how it looked in 1989 in the south of France
This is blasting round the Paul Ricard circuit in South of France
Then a year or 2 later it had it's major makeover, while in allbike spares I spotted a Seeley petrol tank, brand new and they only wanted £25 for it...done! had a bit of messing about to do to get it to fit, also got VFR750 17" wheels and brakes, dug out my old original Yoshimura pipe with home made baffle. I also did a lot to the engine, 823 yoshi kit, gas flowed head (early head with larger valves), lightened/balanced crank with aftermarket con rods, i think they were action 4's, also high lift cam and stiffer valve springs, also got a set of GSXR750 flat slide carbs which were a nightmare to get the jetting right, trial and error for 2 months!!
End result was quite remarkable,it now revved to over 10,000 rpm and i saw 145mph many a time,(probably would have pulled 150 i'm sure) but the speed it accelerated, nothing could touch it up to about 90, thats blades, zzr11's gsxr's...it was hot! I shocked a lot of people at bovingdon aerodrome!!
And it even handled now with the 17 inch wheels and radial tyres
It wheelied like a nutter too, i had to put the original swing arm back on because the braced JMC i had cracked around the chain adjuster!!
But as i said earlier, it has been standing for about 13 years!!!
Bit of a sorry state, but I am determined to do something with it next year, there was something really enjoyable about beating new bikes that it simply should not have done
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