That looks amazing, well done. Which cams did you decided on in the end? My 32 engine has reducing studs on the rocker covers, did yours originally? If so, I don't suppose they're obtainable anymore. Keep us informed of any further progress please. John.
Next question. The time has come to fit the saddle. However I do not have the front saddle mount. Would anyone have a picture of what I need to make (or buy). I'm using the spring type single saddle rather then the duel seat.
I see you have the seat mount on the frame. Are you asking about the brackets on the nose of the seat frame like these? I believe they took a bolt, nut, and related washers to mount to frame boss.
There are three different lengths shown. The one on the left in the first picture has been modified. Not sure which is correct for BSA. I have seen seat frames with no brackets just holes, as you can see, these are riveted on.
Yes that's what I'm after. I hunted for ages to try and find an original BSA fitment one without luck and have had to buy a pattern one. I must admit it looks good quality but is missing the front front mount. I will have a go at making them up myself and riveting them (old style of course) on if they are just flat strip.
Hi, I have a 1950 BSA ZB34GS sitting in my garage. I purchased it three years ago at the Davenport, IA Fall AMCA meet.
The beautiful work you have done on your ZB34A is an inspiration to me to get going on my bike.
From where did you obtain fenders? My bike looks like it was used as a racer at some point; as such it had no front fender and a bobbed aluminum rear fender. I would like to bring the bike back closer to its original appearance. I have a couple of original GS petrol tanks but both are in need of straightening and re-plating. The tank presently on the bike is from an early B31 or B33 I think. I need a chain guard, I thought I would order a chromed one from India. I also need the correct exhaust pipe and muffler. The engine runs in principal but it is very hard to start and the kickstart quadrant is damaged.
Any encouragement or suggestions of where to obtain mostly sheet metal parts is welcome.
Suns a little low for any good pictures but you get the idea. Just waiting on a fuel tap now and the rear chain guard. Tank didn't quite turn out as well as I had hoped but it will do until I find a better one.
I ended up going for matt silver lined in maroon in a B31/B33 style rather than the Gold Star layout/colours. I think it works ok.
One of my twin boys beat me to first sit on the bike but I guess it'll end up being his anyway one day.
Thanks for the offer Boomer. I have one but I forgot to paint it!
I went to fit the fuel tap I had lovingly restored this afternoon only to find its the wrong bleeding one! I was sure it was right going by the parts book but its the wrong thread diameter. I couldn't check it as the tank was off being plated. Still, I hope to take it for its first proper test ride next weekend all being well.
Still collecting bits and pieces. Getting some of the spendy stuff done like this:
Paid a King's ransom. Beautiful work done by Ross Thompson but it still needs paint! Trying to decide whether to use the nice original crank and rebuild or to pay another ransom for a Pierson crank. By the way, Ian Jackson says my ZB31 frame with the GS engine came together from the factory and sent to Hap Alzina in '51.
This is the ZB34 competition, or California chopper. GS engine (with replacement iron topend) and GS gas tank. It came with a nice alloy top end so you wonder why it was replaced with iron. Had a funky Midas made header pipe and I had this one in my pile. Never could understand why they cut out the oil tank for the hot exhaust pipe to tuck in close. 21 inch front wheel with 8" brake, close ratio gearbox. As I looked back at the email from Ian Jackson, it was despatched as a competition GS on March 15th 1950, not '51 as I stated on an earlier post, to Hap Alzina, no trim recorded.
Another thing I've found is I'm getting a little oil/black stuff running down the front cylinder head bolt. This is the one that goes into the exhaust port and isn't blind. I'm guessing it will also get less as the build oil is burnt off.
I remember on another thread that on most of the ZB motors the hole went right through into the port. Is it, or was it common to have this? I'm guessing the thread will seal with carbon after a while.
I don't think its the gasket though as I had both the head and barrel machined after I had a new liner fitted, again by Phil.
However the cylinder head bolt at the very front of the engine goes right into the exhaust port (unlike the BB/CB/DB etc engines). With the head off you can see right into the port though it. I always had a feeling it would leak something in the way of black mess as nothing is sealing it. I'm sure I've read on this forum about it.
The inlet is the same deal with that head bolt again beaching the port wall but of course you don't get black stuff coming out on an inlet very often! lol
You may be referring to the question I posted some time ago, re. the stud & the exhaust port. If I remember correctly, most replies suggested that it's not uncommon & have no effect on the running. As you say, when it carbons up a bit, it should seal completely.
Have you had any luck finding the piston for the ZB32?
Wonderful restoration, i'm nearly ready to fit my ZB22 head & barrel onto the ZB31 bottom end. It wont make it a genuine ZB32, but it's as near as damn it.
Would you know where I can get a cam for the valve lifter assembly, it's one of the bits I can't find?
I'm hoping to hear your 34 run this weekend up here in North Lincolnshire, so give it some revs.
A few ups and downs. On stock BSA carb setting it felt really rich in the middle. I dropped the needle 2 clips and that seems to of sorted that out. It does however feel like its also over fuelling on a closed throttle. I guess this can only be float hight but I can't adjust this with the TT carb. Any idea's anyone?
The dynamo won't charge but I think I can fix that.
The exhaust is blowing a little out of the cylinder head but that's quite an easy fix too.
Riding wise, it feels quite strong. I don't think my cam/exhaust combination is very good but it's still good. Starts just about first kick and is really responsive off the throttle. I've only been up to 60mph but it's really smooth.
I still have to fit the chain guard and a kick start rubber but that's about all.