My new project(s) Honda MB50 Mopeds

[mister c]

Did a little more work last night. I love my Ultrasonic cleaner. Put the oil pump in it & it's come out like new .
Indicator mounting brackets on the frame were in a right mess, bolts siezed & snapped, so have drilled them out & re fabricated them using the long nuts that I bought for my Nonfango rack bodge job & welded them to the frame. Also, the screws in the seat were rusted through & broken, so have made new. It's coming along slowly but surely

[Sir Trev]

That ultrasonic witchcraft thingamy is amazing!

[mister c]

Originally Posted by Sir Trev

That ultrasonic witchcraft thingamy is amazing!

It is cool isn't it? I'm amazed at the results.

A few more bits done tonight. Starting to get a little aggravated, I now have not 2, but 3 engines with broken crankcases, which doesn't bode too well when the 4th is siezed solid. A friend of mine has some Belzoma, which is like a metal putty that sets like steel, so that is on it's way to me from oop North.

Engine 1


Engine 2


Engine 3


I started to strip one of the engines &, as usual, we have the usual "Bodge jobs". I loved this with the sprocket. The centre piece was also tack welded on


Cylinder wouldn't come off, so had to resort to the hacksaw. Good job the normal hardened barrel bolts had been lost & some standard 6mm threaded bar was used instead, made life a little easier




A quick degrease in the bath for the cylinder & head. I have tried my 1mm oversized piston & rings in this barrel & it's a perfect fit, so looks like it's had a rebore in it's past life. I will hone the cylinder to deglaze it before refitting.

[andrewsmith]

Col bitza motor?

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[L3nny]

My mate had one of these when we were 16, it was faster than my TSX and out other mate's DT.

He then crashed it and the exhaust snapped off at the engine, he rode it around like that, with no exhaust for months.

[mister c]

Originally Posted by andrewsmith

Col bitza motor?

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Yes, it'll be made up from 2 engines Andy.

Originally Posted by L3nny

My mate had one of these when we were 16, it was faster than my TSX and out other mate's DT.

He then crashed it and the exhaust snapped off at the engine, he rode it around like that, with no exhaust for months.

The things we do when we're young lol.

[andrewsmith]

So we doing proper HRC mods

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[mister c]

I want it to be a proper restoration. Everything I learned doing the ZXR should help me out. I've ordered a Nickel plating kit to replate all of the original nuts bolts & washers.
I was going to do a black, or red bike, but have decided everybody else does them in that colour, so am going to go with the original logbook, which is white.

[mister c]

So, onto the engine internals. Thought that I would strip the motor completely to see what horrors lay inside. To my amazement, it's spotless. The only real "problem" as such were gummed up clutch plates. Considering the motors have sat for nearly 20 years I'm absolutely amazed. I'm just waiting for new crank bearings & seals before I reassemble it (obviously after a clean & paint )

[Sir Trev]

What was the oil like when you drained it? For something that has sat for so long you would expect more sludge normally.