Wanted: Pics of Jeff Smiths 1964 BSA

[mike1948]

All fascinating stuff. As a previous owner of a 1968 B44, I've enjoyed the banter.  However, it all boils down to the process, and how rule changes can be made - if you want to.  VMX24 posted a copy of the procedure and the relevant form to submit, to apply for a change.  Talking for days is great, and interesting, however nothing will happen.  If anyone here feels strongly about the eligibility issue, and wants to apply for change, follow the process and fill out the form, for goodness sake!  We're all getting older.

[huskibul]

     I think everyone knows what "The Process" entails    this thread is about gathering as much information as possible before some poor bugger/s take it any further ! eveyone thats had input seems to be interested so the longer it goes on  the better -  wouldnt want to go in half cocked would we

[FourstrokeForever]

     I think everyone knows what "The Process" entails    this thread is about gathering as much information as possible before some poor bugger/s take it any further ! eveyone thats had input seems to be interested so the longer it goes on  the better -  wouldnt want to go in half cocked would we

Too Right! The more information that can be given as evidence all helps "The Process". I for one am very interested in this thread. 1, I am learning more about BSA's. 2, I enjoy giving food for thought 

Are frames allowed to be modified with extra gusseting and the like Mark? I was led to believe that the frame had to be "as per the parent frame".....

Yes frames can be modified. Think of the lowered DT1 frames, any number of lengthened swingarms, and the many other 'cut and shut' jobs that make for turning a horrible, ill handling crapmobile into a half decent racer. The C15 frame has been modified for trials and scrambling since the day they were released. The two main areas are to triangulate an extra top rail from the top of the steering head to somewhere near the rear tank mount and to gusset the very flimsy swing arm pivot area. There is (or was) an excellent 'blow by blow' blog from a guy modifying his frame for trials but I'm buggered if I can find it. The photos are excellent and he even gives gusset measurements and overall dimensions. I had full intentions of saving the site so I can use his ideas on my own C15 but I forgot about it and now I can't find it. Bummer.

I wish I would of known that frames can be modified/gusseted before I finished painting my B44 frame. I would of triangulated the "subframe" with some gussets and welded in an extra bar from the down tube to under the back bone. Ah well, the plan always was to get this B44 up and running and then build a GP replica with the spare B44 frame I have....One day at a time 

[Noel]

up to and including the 2011 MOM's (gcr's) the wording had      Bsa         All except B44 and B50.

The 2012 Mom's had a major rewrite and no longer listed bikes that were acceptable in any of the classes, except follow on models in pre70 ,    pre 75, and pre78,

 The whole" Classic" section was  revised (rewritten)  ,

I don't think the intention was to   actually changed the rule ,

I suggest you try to get clarification on this before getting to upset about the current wording.

Just my observation

[firko]

So MBF.....will you be happy to run a A65 swingarm in pre '60..??

Cheeky prick....you love using me as a plaything don't you Brian . I made a mistake, I think the swingarm's out of an A10. Happy?

[AL161]

Whilst I fully support the return to the previous wording which effectively deems all B40s to be pre 65 eligible i.e. carry overs, it is important to note that there are changes to the later models other than the ignition which also alter the external appearance of the engine. These are associated with the change in crank lubrication.

[FourstrokeForever]

Whilst I fully support the return to the previous wording which effectively deems all B40s to be pre 65 eligible i.e. carry overs, it is important to note that there are changes to the later models other than the ignition which also alter the external appearance of the engine. These are associated with the change in crank lubrication.

From what I understand, the lubrication system changed on the Matchless G85 from the G80 as well. What's the big deal? As for appearance of the motor, a lot of BSA B50's get the CCM treatment on the motor.....

[firko]

Whilst I fully support the return to the previous wording which effectively deems all B40s to be pre 65 eligible i.e. carry overs, it is important to note that there are changes to the later models other than the ignition which also alter the external appearance of the engine. These are associated with the change in crank lubrication

I'd also add that any B40 using the B44 OIF style frame would automatically be cancelled out from pre 65 unless the motor was retrofitted to an earlier frame or Metisse/Cheney or eligible aftermarket frame.

[firko]

Here's an interesting and cheap item, a NOS set of what appears to be "distributor" model B40 cases. The interesting part is the sellers '65-66' dating of them.
                                                                                     
http://www.ebay.com/itm/NOS-BSA-Crankcase-B40-SS90-350-Singles-199-1969-65-66-New-Old-Stock-/200901240345?pt=Motorcycles_Parts_Accessories&hash=item2ec6a5a619&vxp=mtr

You will get the brand new BSA B40, SS90 350 Singles 1965-66 new old stock BSA drive and timing side crankcase with bearings, bushings, seals, etc. We combine shipping costs on multiple wins, so check out our ebay store. To get an order with combined shipping you must request and invoice before you pay. Contact us with any questions / 661-877-7911 / 661-252-1174

[huskibul]

 Yeah very interesting firko ! just went into the Rupert Ratio's engine # prefix's and the SS90 first come out in 62' as the BSS model then in 63-64' as the B40SS,and then in 65-66' as the B40FSS odd that they keep the dissy cases,  where as in other sites (c15/b40) and on other models they state the dissy as only going   " up to 64' "  - very grey area

[FourstrokeForever]

Wow Firko, those cases are very different to the side point cases aren't they. It's the first time I've ever set eyes on them there things. Even the oil gallery is totally different. It'd be a lot of work to make that case be able to mount a points ignition. Whether that would be any advantage other than saving a little weight from losing the dissy or not, I have no idea.
You are in a very "grey" Huskibul. But, I still reckon that providing you are using a genuine B40 motor and frame, it should be pre65 legal just for the sake of having more bikes out of sheds and out amongst the fray!

[huskibul]

  Dont  know why you'd want to do it  ,but to turn that distributor motor into a sidepoint could be as easy as bolting on a sidepoint cover and camshaft and blocking dissy hole ,theres a c15 or b40 on the c15 site that looks like thats  happened and it looks like a BSA factory picture 

[firko]

350 BSA Classic Scrambler......from B50.org
I finally got round to uploading a few pictures of my 350 BSA that I race in Classic Scrambles. I don't apologise for the lack of originality of some parts but after a season and a half the chassis has not presented any problems at all. Last years engine was a distributor B40 but I built the current end feed one from a set of B44 crankcases, a NOS B25 crank fitted with a Thunder Engineering Triumph T100 performance rod. On to the rod I attached one of Ed's JE pistons and machined the crankcases and iron B40 barrel to give 10.75:1 compression ratio. I balanced the crank to 70% based upon a collective judgement from Ed and Roger Taylor at RTS. The head is B40 with a larger inlet valve and ported to 30mm. The exhasut is standard with the port opened out to take a 1 1/2 in pipe. The silencer is from Terry Weedy. The gearbox is from a TR25W that I picked up in the US as are the timing cases I have reversed the shift to 1 up to be the same as my AJS Stormer which being a drum selector cannot easily be changed. Ignition is PVL rotor and stator with Rex Caunt CDI box and coil. Advance curve is 31 degrees with full advance set at 34 degrees BTDC. I have just about got the 30 mm Mk1 concentric carb dialed in now with 25 pilot, 106 needle on middle groove, 220 main jet and a 3 cutaway raised to 3.3. I find that the cutaway can make a big difference to the response and it is worth experimenting to find the optimum. This motor is very responsive running on 105 octane leaded race fuel from Anglo American Oil Company in Dorset and is lubricated with filtered Rock Oil TRM fully synthetic 20-60. I went to this because of detonation that I was getting on Super V with 5% Proboost. Now there is no detonation at all. All in all I am please with what I have created, it didn't cost an arm and a leg, is reasonably quick and gives me great fun.
                                                                     
                                                                     
                                                                     
                                                                     
 

[firko]

 Its a B40 motocross bike and was built with no expense spared to the highest specification to compete in classic motocross events.


 Ive been assured this bike is very competitive and that in the right hands could win at the highest level.

The bike benefits from recently being subjected to an engine refresh.

The specification is as follows but if you require any further information then i will happliy put any prospective buyer in touch with this machines current owner.

-Bsa frame, modified for competition with folding footrests.

Terry Weedy swingarm (Longer and stronger than stock for more stability)

Betor forks, widely recognised as the forks to have and have alloy yokes plus benefits from a fork brace.

Oversized magnesium competition front brake

Rickman type rear wheel.

Wheels are built with stainless spokes, brass nipples and new rims

Tyres are Michelin S12, regarded as the best tyres available for this type of machine fitted with heavy duty tubes for peace of mind.

Rear shocks are Reiger, regarded as better than ohlins (one has some damage to body but doesnt affect the suspension performance)

Sammy Miller period copy mudguards

Magura Levers

Renthal Alloy Handlebars

Amal competition throtle

-Pvl Ignition

NEB mainshaft and clutch

 -Amal concentric carb, larger than standard for competition use (custom jetted to enable bike to run on methanol)

-The engine has been built by Roger Taylor at www.rtsracing.com

Please contact me with any enquiries.
                                                               
                                                                 
                                                               
                                                               


And another one........ http://www.westcoastbritishracing.com/B40MX.html

[FourstrokeForever]

They are both B44 frames Firko.... The things they can get away with in pommy land! I also think the first bike has a victor GP or round barrel B44 head going by the left side entry of the carby.