Read a previous post about blocking the air cut off valve inlet. Trying to replace the valves is a PIA as the carbs have to be separated.

I'm thinking of using a cutoff finishing nail and epoxy to block the inlet as shown below:



Any good or bad comments before I do this?

If you like to insert steel parts, you have to be really sure they stay there in place. Less critical seems pure epoxy or soft soldering tin.

I did a test fit and the nail is snug, the nail head will prevent it from being sucked into the carbs.

I'll install them today and post back the results.

In this case Loctite may be a good idea.

Loctite it is.

I'm going by this thread:

http://www.hondacb650.com/viewtopic.php?f=4&t=722&hilit=air+cut+off+valve&start=30

It mentions blocking off the other side - but where? I'm just doing the ones circled in my picture.

Got the carbs back on again and the bike started right up, only needed the choke for 2 minutes, then it idled smoothly and good throttle response.

I just plugged the air box side of the carbs. I'm very impressed with this mod.

It's cold outside ( -24C )and we had 25cm of snow yesterday, so a test ride is on hold.