Try our new info resource - "Aladdin's Cave" (Main menu)Just added a separate link to Ash's Dropbox thread (shortcut)
Two very quick things spring to mind - is the choke mech allowing the butterflies to open fully, i.e. horizontal with choke off? Not too easy to check without removing the air plenum. Secondly have you got resistor plugs OR resistor plug caps fitted but not BOTH? One or other is correct.I was out on my 350/4 the other day to meet up with some visitors and the bike would go ok but not rev freely unless I very gently coaxed it. Found out that I had caught the choke lever and moved it slightly with my gloved hand when I turned the fuel off to fill up. Not so much of a problem on the 400 as there is a larger distance between the two.IanJust thought about observing the choke butterflies but haven’t checked - with the air filter element removed can you use a mirror to look through the plenum into one or part of the intakes? Dunno!ok, thanks for that. I will check the choke. I did put a single plug cap on along with a new set of plugs but I have no idea if they have resistors in them - I will have a try at checking the type using the number printed on the plug.
These little hondas live off being revved .Wasnt there a thread on these engines....may be yours julie.About pre detination. Alot off rebuilt engines completely fubard after 2000 miles .after being rebuilt When built these bikes were designed to be ridden hard..and they were direct from the show room for many thousand milesNow after a rebuild we are all abit to sensible and just dont ride them as originally intended not taking them above 4000 rpm.The engine was designed to be revved hard.. That's why the red line is way round.