www.b50.org

jim-nz

Hi all. I am wanting to do the oil feed modification which involves putting a supply side feed from the rear section of the frame oil tank. The most conveniently available T piece I can find is a brass 5/16 T barb. The ID of the T piece is 0.20 inch. Is this going to be big enough to supply the oil ...

jim-nz

Okay thanks for the replys. So what i am taking from this is that i do have to use screws instead of studs and nuts if i want to be able to get the rocker box off with the engine in the frame. I thought one of the reasons for this also was that a long rod engine could not be fitted into the frame wi...

jim-nz

Hi i am hoping to find out rocker box fasteners work when fitting a long carillo connecting rod. Do the all need to be counterbored cap screws flush with where the nuts usually seat or is that only for certain screws.

jim-nz

Can anyone comment on the importance of the location of the two little holes. particularly in relation to whether they are above or below the stanchion end plug. As stock at full extension the upper hole is inside the end plug and the lower is approximately 21mm below. If i run a 30mm lowering space...

jim-nz

I don't know if this answers any part of your question but I am fairly sure my b50mx frame bare weighs 14.6kg

jim-nz

Hi I have three points to make on this subject. I comment based on research I have done in getting to a similar point as the original poster here. One is that I tried to find an off the shelf solution to the o ring issue without luck. Eventually I bit the bullet and bought a set of ptfe seals from a...

jim-nz

Thanks for the reply. I already have the Mx spacer. I am only concerned about the function of the threaded ring in locating the bearing and the lack of it with the spacer. I am assuming it is not a concern but just wanted to ask around.

jim-nz

hi. I am building a b50 up out of parts and have a question about the locating of the timing side rear wheel bearing. The bike is to be a road racer and will be fitted with a standard conical rear hub. My rear wheel i am using i believe originated from a triumph 650 and had a threaded speedo drive i...

jim-nz

Hi in reply to BSA wm20's comment can I ask a couple of questions. First is you recommend a rear brake spring on the rear lever only then go on to describe your brake as having a spring fitted to both levers. Are you able to explain why this is? Second is you don't seem to be recommending a heavier ...

jim-nz

Below is a section i copied from another site http://www.gpvictor.com. i hope my copying it to here does not violate copyright issue. What i take from reading this is that the works frame was developed for the C15 before good friday 1962. That in my mind makes the works frame pre 63 eligible. My que...

jim-nz

Leif thank you for the informative reply. From what you say i agree there probably production in late 62 but i will keep searching for answers. I have heard mention that the C15C frame was based on a works frame so i will look for reference to the works bike to see how similar it really is. i may en...

jim-nz

Jeff K.

Hmm. I do have family in Chicago...

jim-nz

Hi. Can anyone confirm that the C15C frame which is similar in appearance to the later frames up to 70 B25 and B44 was first built for the 1963 model season or perhaps even earlier? I am interested in the eligibility of this frame for pre 63 road racing. Being a 63 would still include it as a pre 63...

jim-nz

Hi.

I am interested in a B50 head and yokes. Is there anything on offer.

I am in New Zealand.

Can PayPal.

Cheers.

jim-nz

That is interesting Stan.

My in my layman thinking i would have thought that the stock head would not breathe well enough for the x4 cam. Is this not the case?

Cheers.
Jim.

jim-nz

Hi i need to know how i can expect a B50 to run with a stock head, long rod and probably megacycle or mx cam. The machine is to be used for road racing. I was building a "trick" b50 road racer but i have just discovered the frame is not straight and i am sick of it so i am planning to fit my long ro...

jim-nz

Hi B44Claus Thank you for your reply. What you say about the BSA stanchions working with the norton yokes is very interesting to me. I am aware of the difference in stanchion diameters and whether they would work was a question i needed answering. As i am planning on lowering the bike i was looking ...

jim-nz

I see now I get to look at the two side by side how much longer the steel yoke stem is. I have drawn up a design for my own yokes but that doesn't necessarily fit in with the pre 72 road racing rules I am building to. My design is for 60 mm offset but a possible good alternative would be Norton yoke...

jim-nz

As a matter of interest today I saw some pictures of the M&T bike that ended up in Australia. They were on Facebook in a group called just beezas. The pictures were taken at the recent international BSA rally.

jim-nz

Hi has anyone here fitted triumph steel yokes to a B50. I am building a roadracer up from parts and the only useable yokes I have are steel triumph yokes. The stem on these yokes is welded in and is longer than the B50 part. I had hoped I would run a die nut down the stem to extend the thread then t...

jim-nz

Also on the subject of the Y*maha rear wheel. from looking at the pictures i decided it is a DS3-DS6 wheel so i recently obtained a good DS5 wheel. One of the things people say about B50's is that the rear wheel is too heavy so i was surprised to see how much heavier the DS5 wheel is. Rough measurem...

jim-nz

The article states that the bike is lowered 2.5 cm. Would anyone here know if that is at the front and rear or just the front?

jim-nz

Thanks konkretekid i will assume you are correct there and use that dimension in my design I believe the original yokes are the same offset top and bottom. in fact i think one of the bikes in the race bike section of this site is refered to as using a bottom yoke as a top yoke to facilitate adjustme...

jim-nz

Hi does anyone here have the dimensions or a copy of a design drawing for B50 yokes.

I am planning to have my uncle make me some yokes with an altered offset so am mainly looking for the dimension between centers of the fork tubes.

Cheers.
Jim.

jim-nz

Hi all. I have a replacement top engine mount bracket to fit to my b50. The one that fits to the rockerbox and has the head steady to the frame attached. I need to replace it as some previous owner has sawn the valve lifter cable abutment off. My question is does the engine need to be removed to cha...

jim-nz

Hi all

I am after a design drawing of a b50 crankcase showing the location of the drive sproket in location to the engine mounts. or possibly some kind of accurate description of this and how it relates to the swing arm pivot.

Thankyou

Jim

jim-nz

hey that tank looks great. is that colour called hi fi vermillion? if so where did you get the colour match? i am after a lead on a colour for my 1973 Daytona. Cheers.

jim-nz

I have done this on a Daytona I am restoring. I used a bench grinder with a wire brush wheel. It was hard work but got there in the end.

jim-nz

Hey. Thanks for the reply. I don't know what state it was sold in but I believe it was an eastern state as the registry on this site lists it as having been shipped to Baltimore. I have a faded corner of an old registration label but that doesn't seem to give any indication as to the state. I am hop...

jim-nz

Hi I am just wondering if there is any way to obtain information on the title of a bike that was originally sold in the usa. I have the engine and frame numbers and they are matching.

jim-nz

Yeah, thanks for the reply.
i was thinking maybe an ofset ring spanner with the head ground down a bit.
does anyone else use something like this?

jim-nz

Hi all. i am just wanting to confirm what spanner size the gearbox drain plug is on a B50. I live about 100 miles from where i keep my bikes and want to be able to change my gearbox oil next time i am up there. I seem to remember from the last time i looked that the drain plug is a little dificult t...

jim-nz

Hi all. Was wondering if anyone knows of a source of the plugs for the headlight loom on a b50. Mine has been cut of and the headlight wiring spliced into a home made loom. I have another good main loom with the plug attached so if I can find the plastic housing for the headlight side I can attach i...

jim-nz

hi all am after a right side side panel. that is the timing side as some would describe it. if possible i would prefer a white one with the 'VICTOR 500' sticker on it in original used but presentable condition as this would be consistent with the rest of my bike but anything would do. cheers.

jim-nz

Hey Sly. I was bidding against you in the trademe auction for this. I just bought that 72 b50t that was on trademe in Auckland, listed as a 74. haven't seen it yet as i had it shipped to my fathers place in Marton (i live in Wellington). He thinks it looks good though and is more complete than the p...

jim-nz

Hey just was interested to hear of anyone's experiences using a mx cam in a b44. I am considering buying a b44 nearby and have a spare cam I could put in it. Does the mx cam wake the b44 up a bit. Also any other minor mods to help it breathe a bit better? Cheers.

jim-nz

hi. i am just wondering if any P92 frame drawings are available for download as PDF or similar. i want them because i am trying to teach myself to use revit and also would like to try building a frame as a project in the future. Any help would be appreciated. if this is not possible i would entertai...

jim-nz

Oh okay. So yo did a similar job on that did you. Any idea about how I might go about contacting this graham or have any pictures of that frame? Cheers

jim-nz

Hey. Just an account of a time my tiger cub got stuck in second when I was out on a ride. When I pulled the gearbox apart I found that one of the sprung teeth (I think some people call them pawls) in the shifter had stuck back into the shifter so wasn't engaging in the camplate causing the bike to b...

jim-nz

Hi I would be interested to see how you get on with the frame modification to get the carb clearance. I am in a similar situation with my road race project. Wish I could just chuck all my bits on a mk2 seeley frame but that might have to wait.

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