Honda-SOHC

Had this on my F1, although it only blew the fuse about once a week.

I have still got all the original electrics / fusebox etc. I cured it by cleaning all the ignition switch connectors and sprayed switch cleaner into the switch and also cleaned up all the connectors on the back of the fuse box as well as the actual fuse connectors.

Which was the problem? I think it was the fusebox as there was evidence of overheating and discolouring around the main fuse.

Been OK for well over a year now so I count it as fixed! 

Think you need to start by balancing the carbs. You need a flowmeter and yes, the adjustment is on top of the carbs. If you don't have these then a local dealer should be able to help?

Just because you can hear slides clicking home doesn't mean they are ALL doing it at the same time.

My F1s clutch plates tend to stick together when left so initially I have to wait a bit for the clutch to stop rattling before engaging first  apart from that I get no drag. Not using synthetic oils.

What are your symptoms exactly?

Can you post a pic taken a bit further away? Something doesn't look right in the top pic but I can't quite make out which way the front of the bike is. Could the fork slider be reversed or something?

Roy is on the naughty step, Roy is on the naughty step!!!!! 

Agree with Bitsa, it does sound like rich mixture, what do the plugs look like?

It could be condensor(s) breaking down when hot but then I would expect it to run rough all the time when hot regardless of throttle opening. Wouldn't do any harm to replace them though particularly if they are old. If the spark is on the weak side it can sell you a dummy and make a minor carb issue much worse.

Leads me to think carburation and at the lower end of the scale what do you have the slow running screws set at?

Yes, the F1 was designed with a 4 into 1, part of the work to get back the lost horses that emissions control had lost over the years. as a result the 'Supersport' ( relative term!  ) produced the same bhp as the F0. Now thats progress.

I also beleive the F1 / F2 / F3 were attempts to stretch the SOHC fours usefullness as the twin cam wasn't ready.

Personally I love the F1, ( probably rose coloured specs as I had one back in the day ) I actually like the styling but it still looks like something has fallen off the nearside. Perhaps a 4 into 2 would be better? Maybe when I retire I will experiment!

I prefer to say that 'Access to the chain for cleaning and servicing is improved' Green1! 

+1 on liking the colour. Nice job