www.b50.org

Johnu, Excellent work on so many levels. I am very impressed with the build and the details. I built a B44MX for AHRMA track fun a few years back and am having a blast with it on the MX tracks. Haven’t gotten brave enough to take it on a cross country event - yet. The brake side / shift side paradig...

Please see below for the modified B44 oil pipe union...I must emphasize that I haven't run an engine with this arrangement so I can't say if it will work but I don't see why not. The only (and important) concern is if the soldered pipes will break from vibration <201 " I have been running a similar...

The Frame is made by Faber in the UK and is a replica of the Mark lll BSA Factory Works Off Road frame... There have been a few tweaks but I’m not sure what they are. The bike has since been completed and handles like a dream. AHRMA pretty much says any period frame with the B44 motor is ok for Clas...

John, last year I embarked on a very similar project as you described. I call it my B44MX and I am building a second one for a buddy of mine. It’s been great fun and a successful venture for my first Clasics AHRMA outings in 2019 and I’m looking forward to the 2020 season. I’d be happy to share my i...

Very nice work on the fork leg bushings.
Have been considering this on some old Husky legs that are slightly egg shaped.
I am now sufficently inspired by your work

Rad

Nice work...you started with so little and ended up with quite a nice machine.

Rad

Finally received the frames back in May...Ordered in mid 2017.
It was quite a lead time from our Friends at Faber. When we opened the boxes all I could say was "WOW"... It was worth the wait.

Kommando, I look forward to your observations too. It seems that this phenomena centrifugal oil starvation would only be present at sustained high-rpm runs like land speed record attempts or maybe road racing... Being mostly an "off-road only" builder-racer in the vintage world - I had never heard o...

Getting back to work this weekend. I found a cool solution to the oil filter conundrum. I will use a K and P Engineering - S46 stainless steel screen type oil filter (http://kandpengineering.com/) The S46 recomended is quite small at 2.2" x 2.6". They claim one-inch square of their filter material f...

Dent therapy - thats good to know !

Thanks

Regrading the oil filter conundrum... I see an OPRV pop-off values for the B25 and the B50 in the respective shop manual but not much information about the B44 oil pressures. Can anyone help me understand the actual "at temperature" oil pressure that one should expect on a B44. Since we are talking ...

Important stuff first - Beat wins - cases in the kitchen oven for bearing replacement. I will keep you posted on part 2 of your answer moving forward <201 . B44Claus, thanks for you comments. I believe a study of hydraulics will show that with sufficient volume, pressure won't change based on where ...

This jewel (2 of them) came in a several weeks back and one was installed this weekend. I had a chance to use the other special tool built to pull it through. More special thanks to Rupert. I had to order the 5/8-20 nut to build it up.

For oiling the top-end I considered several option but settled on this approach due to its simplicity. Since the bike will be a "racer" and never see any cold weather there was minimal use for the Oil Pressure Relief Valve (OPRV) in its current form. I read about many options and just yesterday saw ...

Anyone know what this is... And I am still happily married...

The crank pinion has some markings that I haven't seen in the books or my other motors - but that's not a surprise.
The Cam is a Mega Cycles "X8" and appears untouched. ( markings H 1 +)

One of the side cases had a seriously ob-longed clutch arm hole in the side cover.
Some creative work on the drill press allowed fitment of a nice oilite bronz bush.
Everything lines up and feels great.

Started the oil modifications on both motors this past weekend.
Both came out the same as seen in pics below.
Next order of business will be fitting B50 up-rated oil pumps.

As seen in the pic below the initials WM are clearly scratched into the crank wheel and into the case by the oil pressure relieve valve.

Does anyone have an idea of who this builder might be ?
More to follow...

Thinks were going well but the clutch didnt look "race ready" but rather abused.
The gear box was to look similar with many gears pitted and unusable.
First sign that DM had touched this motor at one time.

motor 1 came with a stand but not what I needed for a complete rework I followed Rubert's advice and built this

Picked up 2 cores and boxes of spares hoping to build a second motor for bike 2

Day 1 - I brought the Dick Mann motor home that had been in the POs garage for at least 10 years First pic attachment for me too -

Over the Holidays I was able to build a Rupert type motor stand and get all 3 motors Cleaned and stripped.

Parts are arriving daily and hopefully the reassembly process will start soon. In the mean time I have completed several smaller preparations.

Pics and descriptions to follow.

Of course - pictures are coming soon.

About the cost - Duh...no need to restate the obvious...

Thanks for the Welcome and happy New Year.

Rad


Hint

I am beginning the journey into the BSA world of AHMRA Classic MX racing here in the Midwest USA. For me that almost always requires a bike "build" and that starts with a motor on the bench to discover what we have to work with. Well I bought a couple of B44 motors in a box as parts and one reported...