yes martin i think your right, i think the really sweet engines are the one which have been serviced regularly by some one who knows what they are doing, used regularly (not used this year, then stood for 3 years) and only thrashed occasionally
Six years ago my bike was running its best, second gear excelleration would see the front wheel go light and get a little air at 6500 to 8000rpm’s and would easily go to the red line if i wanted,
At the moment im running my spare engine in the bike, it sounds and runs brill upt 5/6 thousand revs,but it will only pull flatly to the red line but no power band at 6.5/8000rpms. but it just dosent feel right, i have discovered since using the honda valve setting tool that the rear exhaust cam has wear in the journels which is allowing the cam to float about making it impossible to set the tappets correctly…The original engine is going back in either after the vf meet or end of year.
The problem with rebuilding these engins is the availability of parts, you just cant get new parts, even crank and con rod bearings are hard to come by, you end up using spares from broken engines which were broken for a reason, thats the thing which made me wince in the artical, the reporter giving it large, like it was a fireblade…if it breaks it will be hard to rebuild with the same performance…
So if youve got a sweet vf, keep it well serviced, get the sump off and clean the oil strainer out, fit one of crookys oil mods, and enjoy