Honda-SOHC

Hello All, 

I once again need you help and guidance!

I am experiencing a hanging idle at 3000rpm.  When warm the engine hangs at 3000 if rev'd, or rises on its own once hot to hang at 3000.  I have been searching through different configurations but am yet to be successful.  Once rolling she rides well with lots of power but at idle and slow speeds hangs at 3000.

Current setup;
Open exhaust
Air pods (i understand this is a big part of the issue but they are staying)

Keihin carbs; 130 main jet, 42 slow jet, needle clip 4(one up from bottom)

I have tested using the air screw - 0, 1/4, 1/2, 3/4, 1, 1 1/4, 1 1/2, 1 3/4 and 2 turns out.  It seems to run best at 1 turn out but still hangs with all turns.

The plugs after idle are normal - not sooty.  They is no smoke coming from the exhaust but i do think that it may still be running lean at idle hence the hang.

You thoughts would be welcome!

Tom


Sent from my iPad using Tapatalk

Ok so it seems that on my carbs the screws on two of the float chambers have had the threads stripped. Any clever ideas on how to sort this out so it wont leak fuel?


Sent from my iPad using Tapatalk

Hello all i need your advice.

I have a 1976 Honda CB500 Four. I bought it three or so years ago from a fellow member of this forum called steve. I have got the bike through a mot after being sorn and been sculpting it into what i want it to be. (See photos). The main change is that the tank, seat and handlebar set are new and i have fitted yamaha xj550 maxim wheels and sprocket (which is noticeable larger than the original 34t Honda one)

Here are some issues i am now encountering;

1. The worst bit- the engine revs uncontrollably. At first it would only do this in neutral but recently these revs are actually driving the bike.  This makes cornering difficult.  I have checked the carbs and the idle screw.  I think air must be getting in somewhere between the carb exit and the valve. Thoughts?

2.  The large sprocket from the xj550 is too big for the engine and gearing. It accelerates but has not top end.  Does anyone know of a sprocket which would fit the wheels (xj550 maxim) 5 bolts but be closer to 34t?

3. In braking the front forks are compressing (as usual) however the front wheel is turning to the right (sligt feeling) . (Disc and caliper are on the left) what does this mean?

All any any advice are very welcome!

Regards


Sent from my iPad using Tapatalk