MB5 back on the road

[SoCal250]

A few months back I had sonic cleaned the the carb on the MB5 and reassembled it with new gaskets. Once that was done it was running great and ready to rip. (or so I thought)
Prior to that it had an occasional fuel overflow issue that was intermittent. Sometimes it would just start dumping fuel on the ground when the petcock was left on. Well that problem got worse, even after going through the carb, to the point where if the petcock was turned on it was as if a hose was running straight out the bottom from the tank. Because the carb is such a pain to work on on this bike it got moved to the end of the priority list and sat for a while until this week.

Pulling the carb is a big PITA and requires removing the seat, the fuel tank (which extends all the way along the frame to the taillight assembly), disconnecting all wiring for the rear turn signals and taillight, removing the rear engine mount bolt, and removing the airbox mounting bolts. Even then, it's pretty difficult to fish the carb out through the available openings. After doing this a few times now I'm getting quicker at it.

So I pulled the carb disassembled it and replaced the float, float pin, and valve with OEM parts. I was fortunate to find a NOS float because they are NLA from Honda. The old plastic float was likely original from 1982 and the rubber tip on the valve was starting to break down and dissolve. There was a little black gooey schmutz on the seat.


Once cleaned up and reassembled it appears to be all good now. Took it for a short test ride and not a drop of fuel after being parked a while.
One more task checked off the list!   On to the next bike...

[m in sc]

    

winning! amazing how something so small can be sooooo annoying. glad you got it sorted

[2 Smoker]

Glad it is all sorted out just in time for tinking around, the smaller cc bikes are always bring a smile to ones face, seems you had to work for it, sounds like a real challenge.

[soonerbillz]

Glad to hear it!
 

[SoCal250]

Put 27 miles on the little ripper today Kinda fun going everywhere at 10K+

[rodneya]

Put 27 miles on the little ripper today Kinda fun going everywhere at 10K+

I remember riding my RZ50 back in the day. Wide open everywhere. Got a bit of a surprise the first time I rode my first RZ350 the same way

[SoCal250]

Took it out again today for another ride

[kpke]

Nice work. That sure looks like fun!!!

[SoCal250]

As I was heading out to do some errands on the MB5 today, a friend stopped by to visit. We happened to go the same direction and he ended up pacing me in his car in the other lane and took a few action photos. Pretty cool to have some pics with me on one of my bikes, but you can't tell I'm doing over 50mph and screaming along at 10,000rpm+.

[kpke]

Awesome!!!

[m in sc]