Search found 902 matches

by Mr Mike
Sun Jan 24, 2021 5:22 pm
Forum: Tech
Topic: wet sumping valve
Replies: 5
Views: 248

Re: wet sumping valve

I use this technique on my B50 which I no longer ride regularly. It WETSUMPS as verified that there is no oil showing on the dipstick after a long idle period. I just pull the drain plug on the primary and drain it into clean container. It will drain most of the oil that has wet sumped. I pour it ba...
by Mr Mike
Wed Jan 13, 2021 10:28 pm
Forum: Tech
Topic: clutch plates
Replies: 4
Views: 700

Re: clutch plates

Frank, this whole process is in "Tech tips" on the web site. It is entitled "Six Plate Clutch"
Mr Mike
by Mr Mike
Mon Jan 11, 2021 5:28 pm
Forum: Tech
Topic: auto decompressor/valve lifter ???
Replies: 25
Views: 1043

Re: auto decompressor/valve lifter ???

I installed an Amal choke yesterday. It seems to cut off most of the air and it would not start using just the full choke, The big singles will only start with a almost closed throttle and liberally tickled seems to work the best when it is stone cold. I raise the slide about a half turn, tickle it ...
by Mr Mike
Wed Jan 06, 2021 4:25 pm
Forum: Tech
Topic: auto decompressor/valve lifter ???
Replies: 25
Views: 1043

Re: auto decompressor/valve lifter ???

Kommando, Do you use the Amal type choke slide mechanism or did you fabricate something else. I grew up in a time when mechanical butterfly chokes were the norm on all motors and you quickly learned how to manipulate them on any engine. I believe I have all the stuff to put an amal slide in there. M...
by Mr Mike
Tue Jan 05, 2021 5:54 pm
Forum: Tech
Topic: auto decompressor/valve lifter ???
Replies: 25
Views: 1043

Re: auto decompressor/valve lifter ???

Yes Skippy, i remember when I first discovered this small change to the starting routine. It was a big improvement and made my B50 (for the most part} a reliable starter. Ii will admit there are occasional times when it starts real hard and generally it is after a long run and the bike is shut off f...
by Mr Mike
Mon Jan 04, 2021 1:49 pm
Forum: Tech
Topic: auto decompressor/valve lifter ???
Replies: 25
Views: 1043

Re: auto decompressor/valve lifter ???

Sometimes you have to fiddle with that decompressor to get it set up just right and I had to make a little bushing to stop leaking but generally it is quite good at getting over TDC. I start my kick when the exhaust valve is just starting to open rather that just past TDC. This way you get a little ...
by Mr Mike
Sat Jan 02, 2021 11:33 pm
Forum: Tech
Topic: auto decompressor/valve lifter ???
Replies: 25
Views: 1043

Re: auto decompressor/valve lifter ???

Why do we try to put modern automatic things on 60/70ties British bikes that have all the advanced technology of the 1940ties?
Mr Mike
by Mr Mike
Sat Jan 02, 2021 5:37 pm
Forum: Tech
Topic: clutch friction plates
Replies: 7
Views: 484

Re: clutch friction plates

That is right Kommando. A thin plate works just fine as long as the total thickness of the plates altogether does not exceed the basket depth and you can get the nuts on. More plates greatly increases driving force.

Mr Mike
by Mr Mike
Sat Jan 02, 2021 3:59 pm
Forum: Tech
Topic: clutch friction plates
Replies: 7
Views: 484

Re: clutch friction plates

First, I would spend my money on the surflex plates. Second, if you will go to the "Tech Tips" on this site, there is a writeup I posted many years ago the converts to a six plate clutch. Read the article and save some of those old skinny plates ...you might need one or two. The six plate clutch sol...
by Mr Mike
Sat May 30, 2020 3:09 pm
Forum: Tech
Topic: How many OIF 250's and 500's were made
Replies: 6
Views: 1282

Re: How many OIF 250's and 500's were made

Jeff, Interesting question. Here's my take: In the late sixties I was looking for a commuter bike. I was getting out of the army and going to college. At the time all I looked at were 250"s...that was enough for a city commuter from the suburbs in those days. I never really considered the 500's and ...
by Mr Mike
Tue May 19, 2020 2:08 am
Forum: Tech
Topic: B25T Gearbox Clicking – What Sound is This?
Replies: 14
Views: 2307

Re: B25T Gearbox Clicking – What Sound is This?

Ed V probably knows more about these bikes then all of us put together. Koncretekid, been to your province three or four times. Always loved it. My mom was from PEI. I always get some cod fish cakes or poached cod when I go up there. Reminds me of my mom. It was regular table fare for me growing up....
by Mr Mike
Mon May 18, 2020 8:33 pm
Forum: Tech
Topic: B25T Gearbox Clicking – What Sound is This?
Replies: 14
Views: 2307

Re: B25T Gearbox Clicking – What Sound is This?

Been into quite a few gearboxes using the above procedure. I put the bike on my homemade lift so everything is right in front of me. Don't take the engine out. Leave chain on so you can turn gearbox easily after fixing to check for sounds. You'll fiddle a bit getting it all back in but once you get ...
by Mr Mike
Sat May 16, 2020 2:43 pm
Forum: Tech
Topic: Amal vs Wassell carburetor
Replies: 45
Views: 6096

Re: Amal vs Wassell carburetor

On a side line....It was mentioned earlier in this thread that this site was getting like Facebook. Nothing could be farther from the truth. This site is the very best source of good technical information regarding the B50 that there is. This thread is a perfect example. It is well monitored, very c...
by Mr Mike
Fri May 15, 2020 9:45 pm
Forum: Tech
Topic: Amal vs Wassell carburetor
Replies: 45
Views: 6096

Re: Amal vs Wassell carburetor

I have decided against converting to the Mik. Mine is a 32 mm roundslide. Not only will I have to resolve the issue of an unknown orifice modification for the enricher circuit, there Is also an interference between the steel web that reinforces the frame and he mouth of the carb. After cutting that ...
by Mr Mike
Thu May 14, 2020 4:14 am
Forum: Tech
Topic: Amal vs Wassell carburetor
Replies: 45
Views: 6096

Re: Amal vs Wassell carburetor

Fella's, we all have to get along. For most of us this is a hobby. I started this fuss when I sort of hi jacked the thread wanting to know is what must be done to the enricher circuit to get my B50 to start cold. Many others have had similar experiences. I have heard to drill out the non removeable ...
by Mr Mike
Sun May 10, 2020 1:59 pm
Forum: Tech
Topic: Amal vs Wassell carburetor
Replies: 45
Views: 6096

Re: Amal vs Wassell carburetor

I agree with Jeff. My inexperience with a Mik is likely part of the problem. I first bought the Mik and made the necessary changes to mount it. I bought some extra jets and I was quickly able to get my 441 running great. I was impressed by it's strong performance and unfaltering idle. Then I went to...
by Mr Mike
Sat May 09, 2020 7:48 pm
Forum: Tech
Topic: Amal vs Wassell carburetor
Replies: 45
Views: 6096

Re: Amal vs Wassell carburetor

Jeff, I have never needed a choke on an Amal. I tried one and took it off. B50's are notorious for hard starting but I have no problems with my procedure. The MIK on my 441 was useless for cold starting but great once warm. I like the simplicity of the Amals. One time I was out riding a 441 and the ...
by Mr Mike
Sat May 09, 2020 4:52 pm
Forum: Tech
Topic: Amal vs Wassell carburetor
Replies: 45
Views: 6096

Re: Amal vs Wassell carburetor

Momus, This may be terminology when you use the word "choke". When I use choke it is enriching the circuit be reducing air flow and consequently creating higher vacuum over the fuel bowl to enrich the mixture. Most choked carbs operate this way. The Mik has an "enricher" circuit which allows additio...
by Mr Mike
Thu May 07, 2020 3:31 pm
Forum: Tech
Topic: oil volume
Replies: 13
Views: 2571

Re: oil volume

For trials, MX and other special purpose bikes a smaller quantity of oil may be fine. For regular motor bikes I think the tanks holding around two liters are appropriate. I never liked the OIF concept. I wonder how much weight you add to the frame so it can carry oil when you compare it to a tin oil...
by Mr Mike
Tue May 05, 2020 3:01 pm
Forum: Tech
Topic: Amal vs Wassell carburetor
Replies: 45
Views: 6096

Re: Amal vs Wassell carburetor

I agree the an AMAL is somewhat outdated compared to Mikuni. However I have always been able to get these bikes to start reasonably easy and run well with AMAL's. I have a box of jets both main and needle and an adjustable float. There is never a problem I can't seem to fix. The Mik on the other han...
by Mr Mike
Sun May 03, 2020 12:32 am
Forum: Tech
Topic: Amal vs Wassell carburetor
Replies: 45
Views: 6096

Re: Amal vs Wassell carburetor

I considered drilling out the jet in the enricher circuit but decided against it. Not sure whether that needed to be drilled out or the tiny hole in carb body where the gas enters the air stream. Overall I kike the quality of Mikuni's but they could have put in a traditional choke that throttles the...
by Mr Mike
Sat May 02, 2020 3:55 pm
Forum: Tech
Topic: Leak back,
Replies: 20
Views: 3132

Re: Leak back,

Mine drains down in a few months and I just start it up and idle the bike till it is back up on the dipstick before taking off I never drain it out and pour it back. The fix is ride at least weekly.

Mr Mike
by Mr Mike
Fri May 01, 2020 2:08 pm
Forum: Tech
Topic: Amal vs Wassell carburetor
Replies: 45
Views: 6096

Re: Amal vs Wassell carburetor

I put a 32 mm Mikuni on my B44 with the intake ported to match. Once warm the carb was a dream.. It would idle like a tractor and no flatspots or stutter through out the range to WOT. The problem was cold starts. The enricher circuit would not do it. It took 20-30 kicks to start the mother. Once war...
by Mr Mike
Fri May 01, 2020 1:54 pm
Forum: Tech
Topic: oil volume
Replies: 13
Views: 2571

Re: oil volume

Two considerations here, both of which have been touched on. (1) If the volume of oil is reduced to say 1/2 a quart, the contaminants generated in normal operation will degrade the oil at a significantly faster rate than with 2 quarts which means more oil changes. (2) the nice thing about dry sumps ...
by Mr Mike
Fri Apr 24, 2020 4:28 pm
Forum: Tech
Topic: Classic Bike Racks B25 B50 TR5T
Replies: 11
Views: 2288

Re: Classic Bike Racks B25 B50 TR5T

I bought what was likely an original rack. It was carbon steel and painted. Can carry a lot of stuff on it with a couple bungies and/or a net. A very good thing to have if you take day or overnight rides. Fits nicely!

Mr Mike
by Mr Mike
Sat Jan 11, 2020 3:36 pm
Forum: Tech
Topic: Selling my B44
Replies: 0
Views: 2702

Selling my B44

I am selling my B44 on Ebay. Hate to let it go but I am trying to simplify life for myself. I am keeping the B50, the last of my Britbikes. Below is the description. BSA . Condition is Used. This bike was originally a 1968 441 Shooting Star (see two pics)with matching engine and frame. I have owned ...
by Mr Mike
Fri Aug 16, 2019 4:44 pm
Forum: Tech
Topic: B44 primary chain tension
Replies: 1
Views: 1153

Re: B44 primary chain tension

Doesn't really matter which side you measure, but you must pull out the slack on the top or bottom and measure on the other side. The kicker will tension the bottom because as it is driving from the clutch. The engine sprocket when it is driving tensions the top. If I have the cover off I just turn ...
by Mr Mike
Mon Aug 12, 2019 1:24 am
Forum: Tech
Topic: Getting out the little bearing of the layshaft
Replies: 9
Views: 3249

Re: Getting out the little bearing of the layshaft

First you get a 5/16ths (I think) carriage bolt about 2 inches long. For those not familiar with the term “carriage bolt”, it’s a bolt with a round head. Underneath the round head is a square shoulder. It is used for fastening wood. As you tighten up the nut the, force pulls the bolt head down into ...
by Mr Mike
Sat Mar 31, 2018 4:25 pm
Forum: Tech
Topic: Stainless Steel Luggage Rack
Replies: 23
Views: 7493

Re: Stainless Steel Luggage Rack

MM is right. I have one of the painted luggage racks and you need an assortment of bungies to fasten your gear. A couple of strategically placed zip ties helps.

Mr Mike
by Mr Mike
Sun Oct 29, 2017 4:28 pm
Forum: Tech
Topic: Starting a B50
Replies: 34
Views: 9263

Re: Starting a B50

Jon, Read all the little items at the end of my post earlier in this thread. When you turn it over past TDC, continue to slowly push the kicker till you feel some springy resistance. That is when the exhaust valve is starting to open. Reset the kicker to the top, turn on the ignition and kick smartl...
by Mr Mike
Mon Jun 19, 2017 3:02 am
Forum: Tech
Topic: B50 Carb setup
Replies: 143
Views: 38176

Re: B50 Carb setup

I use a a #78 drill bit to clean the pilot regularly. It's the best way I have found to keep it clean. Snice al my experiments with carb and starting procedure, my B50 starts when cold on the first kick virtually every time...only occasionally does it take two kicks. When it is cold I always trun th...
by Mr Mike
Wed Jun 07, 2017 9:33 pm
Forum: Tech
Topic: oil pressure
Replies: 18
Views: 5582

Re: oil pressure

I haven't posed in a while but I have heard this complaint on the Brit Bike site over and over and over for the A65 and also the B25. I do not know if my pressure was ever low on my B25 as it did not have a warning light nor did my A65. I have sold both bikes, however on the A65 I fitted a gauge and...
by Mr Mike
Thu Dec 15, 2016 3:01 am
Forum: Tech
Topic: B44SS Big End
Replies: 13
Views: 3552

Re: B44SS Big End

You may have big end problems but your initial description accurately describes "piston slap caused by a worn piston, A rebore and accurately fit piston and rings cures that easily. Check the tge piston and bore for wear while its apart.

Mr Mike
by Mr Mike
Sat Sep 24, 2016 2:05 am
Forum: Tech
Topic: Air Lever
Replies: 14
Views: 4473

Re: Air Lever

I have tried a choke (air slide) and prefer tickling. I have got my routine for the b50 and it works well so I am sticking with it. It is covered in detail on previous posts. I bet a lot of B50's were left to live out there days in a shed or sold because they can be very hard starters.
Mr Mike
by Mr Mike
Thu Sep 08, 2016 12:11 pm
Forum: Tech
Topic: Installing new valve guides
Replies: 43
Views: 11116

Re: Installing new valve guides

Back in the day when I had few tools and less money I used to do it myself as the shop manual describes Today I would not have the guides replaced but simply relined and reamed to fit the new valves. Saves wear and tear on the head by not pressing or driving out the old guides. I had my B50 done thi...
by Mr Mike
Fri Sep 02, 2016 1:57 am
Forum: Tech
Topic: Transmission issues
Replies: 21
Views: 5224

Re: Transmission issues

Claus, It is easier to work in the transmission with it in the frame. I put mine up on a homemade lift and pull up a stool. Very comfortable. I have done it on the bench also but you will have to make a little standor jig for the motor/trans whereas as the if you leave it in the bike, the bike becom...
by Mr Mike
Thu Sep 01, 2016 1:49 am
Forum: Tech
Topic: Transmission issues
Replies: 21
Views: 5224

Re: Transmission issues

Claus, Hard to explain why, but your description is exactly how mine behaved when I broke that spring (2X). (1) Beware of aftermarket springs and (2) don't pull the engine just the side covers and (3) make sure the spring is aligned by putting the shifter forks on their pivot rod to ensure the nose ...
by Mr Mike
Thu Aug 18, 2016 2:10 pm
Forum: Tech
Topic: The best way to get an honest 40hp from a B50
Replies: 20
Views: 5390

Re: The best way to get an honest 40hp from a B50

Give Ed V a call. He's been building them for years. HP Stan also knows what is possible. Unless you want to race with similar I have found that a good running B50 is all I need. It can keep up on most of the four lanes but it is best as a back road cruiser. OTOH if you want to see what can be done,...
by Mr Mike
Tue Aug 16, 2016 1:43 pm
Forum: Tech
Topic: Starting a B50
Replies: 34
Views: 9263

Re: Starting a B50

Beat, what is your method? I know your machine is significantly modified. Mine is very much stock except for a 32mm ported intake and a 32mm concentric carburetor. All ignition components are stock. One of these days I will try to perfect a hot start procedure. Mine starts equally well when cold or ...
by Mr Mike
Mon Aug 15, 2016 1:30 am
Forum: Tech
Topic: Starting a B50
Replies: 34
Views: 9263

Re: Starting a B50

Beat, If you think about it for a minute all we are saying is don't start the kick right past TDC. Turn the engine over farther before starting the kick so that the engine will have more speed as it approaches compression and ignition, It makes kicking easier, less stress on kick start mechanism, an...