Search found 1344 matches

by Jeff K
Sun Sep 27, 2020 2:41 pm
Forum: Tech
Topic: Rickman Framed B44
Replies: 8
Views: 192
Flag: United States of America

Re: Rickman Framed B44

The older bikes used cast sections that were machined to except the tubing, this included fittings for items like foot pegs that were slid over the tubing. These were then brazed together. Later they started to weld these casting to the tubing. Most custom frames that I have seen through the years w...
by Jeff K
Sat Sep 26, 2020 3:09 pm
Forum: Tech
Topic: Rickman Framed B44
Replies: 8
Views: 192
Flag: United States of America

Re: Rickman Framed B44

I found out decades ago the the secret to good welding is a good face shield so you can see what you are doing. I have been using a 35+ year old cheap "Multi-mig" brand that was made in Italy. When it is dialed in right, I can see the wire form a small bead and then the bead drops/jumps the small ar...
by Jeff K
Sat Sep 26, 2020 2:22 am
Forum: Tech
Topic: Rickman Framed B44
Replies: 8
Views: 192
Flag: United States of America

Re: Rickman Framed B44

How about MIG brazing. Some of the car manufacturers have been doing this for a while. It is a "brazing wire includes copper-silicon (CuSi3), which is most common for sheet steel, or bronze alloy solder (CuAl8 and CuSn6). " that is used with a mig welder. I think they started to use this when they s...
by Jeff K
Tue Sep 22, 2020 7:00 pm
Forum: Tech
Topic: B50 valve lifter to bare casting.
Replies: 28
Views: 1040
Flag: United States of America

Re: B50 valve lifter to bare casting.

Do the B50's have the same problem as the B40 & B44"s with the many different head gasket thicknesses? I ran into this with a B40, the Cylinder wall lip would hit the head before the gasket had completely sealed. Turns out the B40 copper gasket is thicker then the b44. Well documented in the Ratio b...
by Jeff K
Tue Sep 22, 2020 5:27 pm
Forum: Tech
Topic: tightening head nuts sequence
Replies: 9
Views: 236
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Re: tightening head nuts sequence

The threads should be clean and dry and NOT oiled as the tightening torque will be increased due to the lowered friction caused by the oil! Tightening sequence isn't so important on a single cylinder engine as it is on a multi cylinder engine, as a general rule you just need to tighten in diagonals...
by Jeff K
Fri Sep 11, 2020 1:59 am
Forum: Tech
Topic: B25 Rough Running..missing slightly
Replies: 17
Views: 652
Flag: United States of America

Re: B25 Rough Running..missing slightly

"You pays your money and gets the technology for the price." Yes indeed!. The Power Arc is not cheap at all. But you get a choice of 4 built in spark advance curves--- Regular gas mild Regular gas wild Premium gas mild Premium gas wild And it has a built in port to hook up your laptop to it so you c...
by Jeff K
Wed Sep 09, 2020 7:58 pm
Forum: Tech
Topic: B25 Rough Running..missing slightly
Replies: 17
Views: 652
Flag: United States of America

Re: B25 Rough Running..missing slightly

I think that the Tri Spark is like the USA made power Arc in that they both spark three times. I have installed a several of the Power Arcs units and the first thing that I noticed every time, was the idle speed jumped up a couple of hundred rpm and the bikes ran noticeable smoother. Since your prob...
by Jeff K
Sun Sep 06, 2020 2:35 pm
Forum: Tech
Topic: B25 Re-sleeve
Replies: 4
Views: 305
Flag: United States of America

Re: B25 Re-sleeve

It has been a few years since I had a B40 re-sleeved. You have the cost of the sleeve, the labor and then it still has to be bored or honed to fit the new piston. Cheaper to find a good used one. I think at the time that I had $150.00 + into it.
Jeff
by Jeff K
Tue Sep 01, 2020 11:21 pm
Forum: Tech
Topic: B50 oil pressure switch removal
Replies: 8
Views: 259
Flag: United States of America

Re: B50 oil pressure switch removal

Armstrong Phil wrote:
Tue Sep 01, 2020 11:11 pm
Sounds like I've opened a can of worms! Think I'll take the switch out, cut the head off and drill tap it for a sealing bolt and use that, at least I know I've got the right thread and won't damage the case.
:thumb :thumb
by Jeff K
Tue Sep 01, 2020 6:50 pm
Forum: Tech
Topic: B50 oil pressure switch removal
Replies: 8
Views: 259
Flag: United States of America

Re: B50 oil pressure switch removal

Is it a tapered or straight thread? I seem to recall that Triumph Triumph T100 twin used both. I am not sure if BSA did also, I know that BSA and Triumph shared a lot of parts. Getting them mixed up will cause issues.
Jeff
by Jeff K
Sun Aug 30, 2020 1:16 am
Forum: Tech
Topic: B25SS exhaust pipe
Replies: 9
Views: 435
Flag: United States of America

Re: B25SS exhaust pipe

I just checked his web page and it looks like he makes the 71 mufflers. "B25/50 Pressed muffler $310 ea" https://dropbears.com/overlander/classic.htm Dropbears? Aren't Dropbears the man eating, killer cousin to the timid Koala? I seem to recall that they only attack after their victim has consumed m...
by Jeff K
Fri Aug 28, 2020 7:27 pm
Forum: Tech
Topic: B25SS exhaust pipe
Replies: 9
Views: 435
Flag: United States of America

Re: B25SS exhaust pipe

LOL! I just reread the original posting and the poor excuse was given that perhaps the barrel was shortened?? --- 3/4" ?? :roll: :roll:
Jeff
by Jeff K
Fri Aug 28, 2020 7:24 pm
Forum: Tech
Topic: B25SS exhaust pipe
Replies: 9
Views: 435
Flag: United States of America

Re: B25SS exhaust pipe

Sad when you think about it. The factory was able to manufacture these 50 years ago on what was old equipment back then and they fit and worked. And here we are one half a century later will all of our massive advancements in computers, scanning, CNC, manufacturing, technology etc and the "new" pipe...
by Jeff K
Fri Aug 28, 2020 4:10 pm
Forum: Tech
Topic: B25SS exhaust pipe
Replies: 9
Views: 435
Flag: United States of America

Re: B25SS exhaust pipe

As we say here in the USA, I am calling Bull Sh*T on that sellers answer. I have a 1971 Triumph Trail Blazer that is still original and untouched! and here are the photos of it for you. The original clearance is not in the thousands, it is closer to 3/4". This is just the way that the bike came from...
by Jeff K
Thu Aug 27, 2020 3:19 pm
Forum: Tech
Topic: Lozenge Silencer
Replies: 6
Views: 690
Flag: United States of America

Re: Lozenge Silencer

Great work!
Jeff
by Jeff K
Sun Aug 23, 2020 1:53 am
Forum: Tech
Topic: Bsa b44 enduro
Replies: 6
Views: 501
Flag: United States of America

Re: Bsa b44 enduro

Blue Loctite works wonders on studs. Holds and seals. plus in comes apart with hand tools.
Jeff
by Jeff K
Fri Aug 21, 2020 3:07 pm
Forum: Tech
Topic: Oil leak(s) b50
Replies: 11
Views: 550
Flag: United States of America

Re: Oil leak(s) b50

I would think that using Loctite blue would serve the same purpose. Seals and locks, and can be remove with hand tools.
https://www.amazon.com/Loctite-Heavy-Du ... B000I1RSNS
Jeff
by Jeff K
Fri Aug 21, 2020 3:02 pm
Forum: Tech
Topic: B25SS Burning Oil
Replies: 28
Views: 713
Flag: United States of America

Re: B25SS Burning Oil

The Kibblewhite Valves are specially coated SS and their guides are a very hard copper based C63000 nickel-aluminum bronze. The valve will not fit into the guide when you get them. The using pin bore gauges that are in the ten thousands range you have to hone them to fit. Then once the head is heate...
by Jeff K
Thu Aug 20, 2020 7:26 pm
Forum: Tech
Topic: B25SS Burning Oil
Replies: 28
Views: 713
Flag: United States of America

Re: B25SS Burning Oil

I have been using the Kibblewhite Black Diamond valve and Bronze guides for a while. The bronze guides are so hard that you can not use a reamer on them and they have to be honed to fit. Here is their recommended clearances. Aluminum cylinder head recommended valve stem-to-guide clearance is as foll...
by Jeff K
Thu Aug 20, 2020 7:16 pm
Forum: Tech
Topic: B25SS Burning Oil
Replies: 28
Views: 713
Flag: United States of America

Re: B25SS Burning Oil

And we have a Winner! Bad Guides! :ban
Jeff
by Jeff K
Thu Aug 20, 2020 6:34 pm
Forum: Tech
Topic: B25SS Burning Oil
Replies: 28
Views: 713
Flag: United States of America

Re: B25SS Burning Oil

Just a odd problem and normally you would see oil leaking on the outside due to it. How is the fit between the head and the cylinder liner. B40's had a issue with aftermarket copper head gaskets being too thin and the liner would hit the head before the head could seal the copper head gasket. You co...
by Jeff K
Wed Aug 19, 2020 2:40 pm
Forum: Tech
Topic: Cooked battery
Replies: 11
Views: 466
Flag: United States of America

Re: Cooked battery

I had issues using LI-ON batteries in the past, two in a 850 Norton and one in 750 Triumph. After many conversations with the company, it was determined that they do not play nice with either the Podtronics or the stock charging systems. The Manufacture recommended a charging system that was designe...
by Jeff K
Tue Aug 18, 2020 2:53 pm
Forum: Tech
Topic: Bsa b44 enduro
Replies: 6
Views: 501
Flag: United States of America

Re: Bsa b44 enduro

Clean it off with carburetor cleaner/spray, let dry and then blow some baby powder/talc on the area and start it up. Short ride and you should be able to pin point the leak. Many times it is seeping from some where else and where you see it , is where it has settled at.
Jeff
by Jeff K
Mon Aug 17, 2020 5:54 pm
Forum: Tech
Topic: B25SS Burning Oil
Replies: 28
Views: 713
Flag: United States of America

Re: B25SS Burning Oil

Excellent choice using Mark!
Jeff
by Jeff K
Mon Aug 17, 2020 2:39 pm
Forum: Tech
Topic: B25SS Burning Oil
Replies: 28
Views: 713
Flag: United States of America

Re: B25SS Burning Oil

"A Starfire piston will fit a onto an SS con-rod, so it’s more than likely that this is the only non-SS item fitted. " The crankshafts and rods are different between the two models and the factory used a different ratio to balance them. Heavy oil use due to rings normally equals clouds of blue smoke...
by Jeff K
Sun Aug 16, 2020 11:28 pm
Forum: Tech
Topic: B25SS Burning Oil
Replies: 28
Views: 713
Flag: United States of America

Re: B25SS Burning Oil

What type of oil did you use to break it in with? Some of the new oils will cause the rings to go a very long time before finally breaking in. I remember a old cycle mechanic pal of mine used to swear by using WD40 as a assembly lube for cast iron rings and cast iron bore. He firmly believe that any...
by Jeff K
Sat Aug 15, 2020 4:48 pm
Forum: Tech
Topic: flywheel balancing
Replies: 15
Views: 568
Flag: United States of America

Re: flywheel balancing

I should add that if you do not have the "factory" tool. A old work around was get a roll of electrical or plumber's solder, the heavier 1/8" diameter stuff, unroll it and weight it. then carefully cut off enough to get the proper weight and then just wrap this around the big end . The key word here...
by Jeff K
Sat Aug 15, 2020 4:37 pm
Forum: Tech
Topic: flywheel balancing
Replies: 15
Views: 568
Flag: United States of America

Re: flywheel balancing

I was just checking my old notes and found this. It was from Peter Quick's BSA unit singles site. The 1971 is different due to the change in the connecting rod.
B50 B25 SERVICE BULLETINS 1971 TO 1973xx.pdf
(187.28 KiB) Downloaded 26 times
Jeff
by Jeff K
Sat Aug 15, 2020 4:27 pm
Forum: Tech
Topic: flywheel balancing
Replies: 15
Views: 568
Flag: United States of America

Re: flywheel balancing

From the repair manual.
ws-bsa-B25-B50-part2 00-4188.pdf
(452.89 KiB) Downloaded 34 times
Jeff
by Jeff K
Sat Aug 15, 2020 4:03 pm
Forum: Tech
Topic: B25SS Burning Oil
Replies: 28
Views: 713
Flag: United States of America

Re: B25SS Burning Oil

Cocker Cox wrote:
Sat Aug 15, 2020 3:18 pm
So, what you’re saying is, whoever changed the piston may not have spaced out the piston rings gaps?!
Sadly, I have also seen this before when some one had just rebuilt their motor for the first time. A very good learning experience.
Jeff
by Jeff K
Sat Aug 15, 2020 3:57 pm
Forum: Tech
Topic: B25SS Burning Oil
Replies: 28
Views: 713
Flag: United States of America

Re: B25SS Burning Oil

Black Smoke? Black Smoke is normally carbon and indicates running way too rich, like a cold motor with too much choke. blue Smoke is burning oil, and if you can see the blue smoke, then will also be able to smell it. Lastly white smoke is water vapor. Rare in a air cooled motor until we were forced ...
by Jeff K
Sat Aug 15, 2020 3:30 pm
Forum: Tech
Topic: flywheel balancing
Replies: 15
Views: 568
Flag: United States of America

Re: flywheel balancing

BSA, Triumph and the after market used to sell a clip on weight that would go on the main bearing and replace the rod/piston. It has been many years, but I seem to recall that you would then place the crank on a pair of knife edge parallels and drill out enough metal if needed until it was balanced ...
by Jeff K
Fri Aug 14, 2020 2:57 pm
Forum: Tech
Topic: Gearbox vent 1971 B25T
Replies: 10
Views: 624
Flag: United States of America

Re: Gearbox vent 1971 B25T

Links to more GL4 / GL5 data. http://www.benchmarkworks.com/articles/tech/gearoil.html https://www.widman.biz/uploads/Transaxle_oil.pdf https://www.tractorbynet.com/forums/oil-fuel-lubricants/145754-gl4-gl5-gear-lube-bronze.html https://static1.squarespace.com/static/5c6dec53b10f25d4edf0b3f7/t/5c6ef...
by Jeff K
Thu Aug 13, 2020 2:03 pm
Forum: Tech
Topic: Gearbox vent 1971 B25T
Replies: 10
Views: 624
Flag: United States of America

Re: Gearbox vent 1971 B25T

The newer Gear oils contain Sulfur that can eat away at anything that has brass in it, like bushings. This will in time turn the oil dark. I think that you want a GL4 rated oil and not the GL5.
Jeff
by Jeff K
Mon Aug 03, 2020 11:05 pm
Forum: Tech
Topic: Off-throttle hanging revs
Replies: 25
Views: 1319
Flag: United States of America

Re: Off-throttle hanging revs

Be sure that when they paint your gas tank that they DO NOT paint the upper part where the gas cap/ gasket makes contact. This area needs to be bare! if it is painted, the gas will creep under the paint and work it's way down and ruin a good paint job! Any one who has painted a motorcycle gas tank i...
by Jeff K
Mon Aug 03, 2020 3:57 pm
Forum: Tech
Topic: Off-throttle hanging revs
Replies: 25
Views: 1319
Flag: United States of America

Re: Off-throttle hanging revs

http://amalcarb.co.uk/contacts I would email or try giving them a call. I am not sure what the differences are between the 2 cycle and 4 cycle needles. But they are different. Problem solving is a process of elimination, you are getting closer. I would replace that needle with the correct one, then ...
by Jeff K
Mon Aug 03, 2020 12:48 am
Forum: Tech
Topic: Off-throttle hanging revs
Replies: 25
Views: 1319
Flag: United States of America

Re: Off-throttle hanging revs

If you have to bend the tabs, use a pair of needle nose pliers and just bend them enough to remove any slop in the spring, do not use them 'pre tension" the spring until you have tried all of the different springs and combinations 1st! Fewer coils and thicker wire = Strong spring, more coils and thi...
by Jeff K
Sun Aug 02, 2020 10:12 pm
Forum: Tech
Topic: Off-throttle hanging revs
Replies: 25
Views: 1319
Flag: United States of America

Re: Off-throttle hanging revs

Check that the little oil felt on the points that lubes the cam is not too tight and causing it to drag. It should be just touching enough to let the oil get on the AA cam. Then take a little screw driver and move the AA to full advance. Then let it snap back, it should snap right back, If it does n...
by Jeff K
Sat Aug 01, 2020 3:58 pm
Forum: Tech
Topic: Off-throttle hanging revs
Replies: 25
Views: 1319
Flag: United States of America

Re: Off-throttle hanging revs

Be aware that they had at least three different AA springs, Strong, med and soft. I used to have a few boxes of them and sometimes it was a combination that worked best. One strong, one medium etc.
Jeff
by Jeff K
Sat Aug 01, 2020 3:55 pm
Forum: Tech
Topic: Speedometer Cable Lube?
Replies: 3
Views: 294
Flag: United States of America

Re: Speedometer Cable Lube?

Back in the 1970's and my dirt bike days, I used to use powered Graphite. You could get a small green bellows full of it at any key shop and it worked gets. Lots of mud and sand where we used to ride and any grease or oil would attract it. Here is a newer version of it. https://www.amazon.com/Powder...