Search found 1376 matches

by Jeff K
Sun Jan 17, 2021 3:22 am
Forum: Tech
Topic: New Build Oil Types
Replies: 4
Views: 121

Re: New Build Oil Types

DO NOT use automobile oils! Due to the catalytic convertors, they have greatly reduce amounts of ZDDP and this will cause rapid wear on the rocker arms and any high pressure contact point areas. There are many good oils made for motorcycles out there. I like the ones rated for V twins because they d...
by Jeff K
Sat Jan 16, 2021 1:31 pm
Forum: Tech
Topic: Stripped thread - tank rack
Replies: 3
Views: 71

Re: Stripped thread - tank rack

by Jeff K
Fri Jan 15, 2021 2:15 pm
Forum: Tech
Topic: B25 Negative crankshaft end float
Replies: 6
Views: 139

Re: B25 Negative crankshaft end float

If you still have the old Bearing. Measure it and compare it to the new bearing.
Jeff
by Jeff K
Mon Jan 04, 2021 7:14 pm
Forum: Tech
Topic: Unable to remove valve collets
Replies: 10
Views: 291

Re: Unable to remove valve collets

They used to run the B44 aluminum cylinder and piston. You had to shorten up the cylinder and rebalance the crank. The B40 SS head is the same as the B44 round head. Same casting number too. The b44 just had the stud holes bored out for the bigger cylinder studs. The B44 square head can also be made...
by Jeff K
Sun Jan 03, 2021 10:17 pm
Forum: Tech
Topic: b40 lubrication system modification ?
Replies: 15
Views: 414

Re: b40 lubrication system modification ?

I used a B25 oil pipe junction on a B40 that I built. It was in a later B25 frame and I wanted to use the later style rocker feed from the junction block since I was using a later oil tank and that did not have the "T" for the rocker feed. It was a simple matter unsolder, plug the line and then to d...
by Jeff K
Sun Jan 03, 2021 10:03 pm
Forum: Tech
Topic: Unable to remove valve collets
Replies: 10
Views: 291

Re: Unable to remove valve collets

Does your engine still have the cast iron cylinder on it?
Jeff
by Jeff K
Sun Jan 03, 2021 5:00 pm
Forum: Tech
Topic: b40 lubrication system modification ?
Replies: 15
Views: 414

Re: b40 lubrication system modification ?

I am not sure about the later model B40. But be careful with the oil lines. The earlier model has the input and output lines opposite from the B25 engines.
Jeff
by Jeff K
Sun Jan 03, 2021 1:56 am
Forum: Tech
Topic: auto decompressor/valve lifter ???
Replies: 25
Views: 824

Re: auto decompressor/valve lifter ???

Mr Mike wrote: Sat Jan 02, 2021 11:33 pm 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
LOL-- Because we are also 60/70ties and need all the help that we can get. :thumb
Jeff
by Jeff K
Sat Jan 02, 2021 3:54 pm
Forum: Tech
Topic: Unable to remove valve collets
Replies: 10
Views: 291

Re: Unable to remove valve collets

I remember that a long time ago they used to sell valve-lash caps. Back when we used to regrind the valves, you would also have to regrind the top of the valve to get it flat and true again. You would then fit a new cap on the end, most of the time these caps were hardened. The end of the valve stem...
by Jeff K
Mon Dec 14, 2020 2:42 am
Forum: Tech
Topic: B25/B50 center Stand
Replies: 1
Views: 236

Re: B25/B50 center Stand

B25/B50 center stand mounting lugs compared to the TR5T.
Jeff
by Jeff K
Mon Dec 14, 2020 2:34 am
Forum: Tech
Topic: B25/B50 center Stand
Replies: 1
Views: 236

B25/B50 center Stand

I rolled out my 1971 B25 and grabbed a OIF twin center stand from the pile. It bolted right on and fit. The side lever is too long, but I can cut it off and leave a 2" stub and it will work, I normally step on the foot of a center stand and pull back to set the bike up. The rear tire is up high enou...
by Jeff K
Sun Dec 13, 2020 7:37 pm
Forum: Project bikes
Topic: B50/44 Hybrid
Replies: 21
Views: 988

Re: B50/44 Hybrid

Hi Jeff, Thanks for your responses. I tried to straighten the side stand today it wasn't entirely successful but at least far better than before. I'm cleaning the frame internals with gasoline and a control cable through the filler hole. It's the fourth filling with gasoline and it's just as dirty ...
by Jeff K
Sat Dec 12, 2020 11:56 pm
Forum: Project bikes
Topic: B50/44 Hybrid
Replies: 21
Views: 988

Re: B50/44 Hybrid

Try mineral spirits and a few BB's, shake hard and then drain. Repeat until the Mineral Spirits come out clean. Blow dry with compressed air. And count how many BBs you put in and keep shaking until you get that same number out. :mrgreen:
Jeff
by Jeff K
Sat Dec 12, 2020 11:53 pm
Forum: Project bikes
Topic: B50/44 Hybrid
Replies: 21
Views: 988

Re: B50/44 Hybrid

Yes, they were completely straight from the factory. Rarely found that way after someone has been kick starting the bike while it is on the side stand.
Here are two photos pf a new stand stand.
Jeff
by Jeff K
Fri Dec 11, 2020 8:44 pm
Forum: Tech
Topic: Seat brackets size
Replies: 14
Views: 724

Re: Seat brackets size

"Metric! Don't you know we are leaving the EU for the sole reason that we don't like their Micky Mouse system of measurements!" :thumb :thumb :thumb :thumb Few people realize how many different Metric systems there are out there. So much for being a Standard. The Japanese had their own, the JIS up u...
by Jeff K
Fri Dec 11, 2020 8:36 pm
Forum: Tech
Topic: Seat brackets size
Replies: 14
Views: 724

Re: Seat brackets size

The B25/B50/TR5T alloy and steel Standard tanks, I think take the same front mount. The 3 gallon UK & Europe only tank I think has a different front mount.
Jeff
by Jeff K
Fri Dec 11, 2020 7:39 pm
Forum: Tech
Topic: Seat brackets size
Replies: 14
Views: 724

Re: Seat brackets size

The photo's are from a spare B50 frame, the seat mounts are the same as the TR5T.
Jeff
by Jeff K
Fri Dec 11, 2020 7:37 pm
Forum: Tech
Topic: Seat brackets size
Replies: 14
Views: 724

Re: Seat brackets size

And a couple in Metric
by Jeff K
Fri Dec 11, 2020 7:35 pm
Forum: Tech
Topic: Seat brackets size
Replies: 14
Views: 724

Re: Seat brackets size

In Inch
by Jeff K
Fri Dec 04, 2020 4:38 am
Forum: News
Topic: UK will start charging 30% tax on classic Cars.
Replies: 2
Views: 313

UK will start charging 30% tax on classic Cars.

I just read this today. The UK will start charging 20% vat and 10% import tax on imported classic cars. Will this effect Classic motorcycle also? I also found out that starting on January 1, ebay will be collecting VAT on items being purchased and imported up to 135 pounds in value. ---- Ouch! :uhu ...
by Jeff K
Thu Dec 03, 2020 4:52 am
Forum: Tech
Topic: New Amal Premier Carb/Tickler Issue
Replies: 3
Views: 431

Re: New Amal Premier Carb/Tickler Issue

Install the insulator, the Carburetor will be happier. :lol:
Jeff
by Jeff K
Wed Nov 11, 2020 1:58 pm
Forum: Tech
Topic: Electrex Ignition Question
Replies: 7
Views: 942

Re: Electrex Ignition Question

Electronic Ignitions tend to be at full advance and then they "retard" the timing at low RPM. So you set them at TDC and they adjust for the advance. The full advance makings are are normally use for strobing the timing to check on the advance. An example would be the Power Arc units, you set the pi...
by Jeff K
Fri Oct 30, 2020 1:45 pm
Forum: Tech
Topic: Rebuild Compression
Replies: 26
Views: 1862

Re: Rebuild Compression

Propane torch is all that I have every needed. You will know when it is done right because the gasket will be very pliable compared to stiff before you started.
Jeff
by Jeff K
Thu Oct 29, 2020 8:57 pm
Forum: Tech
Topic: Rebuild Compression
Replies: 26
Views: 1862

Re: Rebuild Compression

I thought the same thing at the time. Then I had a Don Hawley, old Triumph mechanic from the long gone Saginaw Cycle sales tell me that he had the same problem years ago. 500cc Twin cylinder no pushrods, so no air in, no air out. Same deal, a customer tried to rebuild it himself. So yes it does comp...
by Jeff K
Thu Oct 29, 2020 11:43 am
Forum: Tech
Topic: Rebuild Compression
Replies: 26
Views: 1862

Re: Rebuild Compression

A little soap and water around the head gasket will tell you if it is leaking. No bubbles is a good thing.
:thumb
Jeff
by Jeff K
Thu Oct 29, 2020 1:43 am
Forum: Tech
Topic: Rebuild Compression
Replies: 26
Views: 1862

Re: Rebuild Compression

Compression check- write it down. Pull the plug squirt a little oil and redo compression check. If it jumps up, then it is the rings. If it does not then it is the valves. Using WD40 as a piston ring assembly lube will speed up the break in. I also like to pull the plugs and kick it until my leg tel...
by Jeff K
Fri Oct 23, 2020 2:30 am
Forum: Parts for sale
Topic: Ebay -OEM BSA B50T exhaust muffler-silencer B50ss gold star B25
Replies: 0
Views: 867

Ebay -OEM BSA B50T exhaust muffler-silencer B50ss gold star B25

OEM BSA B50T exhaust muffler-silencer B50ss gold star B25. Saw this today, looks nice.
https://www.ebay.com/itm/164462119503

Jeff
by Jeff K
Thu Oct 22, 2020 7:28 pm
Forum: Tech
Topic: Ok..now its got me mad..spark plug
Replies: 11
Views: 1253

Re: Ok..now its got me mad..spark plug

Tickle it, kick over and if nothing. Then pull the plug and check for signs of gas. If it is dry or you can not smell any gas- then that is it, you are not getting any gas to it. Are you holding the tickler down long enough to see gas running out?
Jeff
by Jeff K
Thu Oct 22, 2020 1:39 pm
Forum: Tech
Topic: B50 valve lifter to bare casting.
Replies: 37
Views: 3423

Re: B50 valve lifter to bare casting.

Thin copper gaskets have been well covered here and on other sites. I found that only the original 4 stud B40 gasket kit had the thicker .048" one. I had latter OEM BSA 6 stud BSA B40 gasket kits that had the thinner .036" in them. At the time I had Peter Quick and Ed V. checked their inventory and ...
by Jeff K
Fri Oct 02, 2020 4:16 pm
Forum: Tech
Topic: tightening head nuts sequence
Replies: 27
Views: 2708

Re: tightening head nuts sequence

Silicone in the bolt hole was common back in the 1960's-70 dirt bike era. I have seen it more then a few times where the owner would use the hand held impact driver and a big hammer. A bit of silicone in the hole and the results were the bottom of the hole getting blown out. Mostly on bolts/screws t...
by Jeff K
Tue Sep 29, 2020 8:59 pm
Forum: Tech
Topic: tightening head nuts sequence
Replies: 27
Views: 2708

Re: tightening head nuts sequence

Did you pull the stud to see if anything was in the hole? I can remember seeing where people had used excessive amounts of gasket sealer on a stud/bolt and then when they tried to screw the stud/bolt in all the way, it could not bottom out due to the sealer in the hole. I can also remember seeing de...
by Jeff K
Mon Sep 28, 2020 9:48 pm
Forum: Tech
Topic: tightening head nuts sequence
Replies: 27
Views: 2708

Re: tightening head nuts sequence

Check the height of the threaded section on all of the studs. You could be running out of thread before nut has tightened the head down.
Jeff
by Jeff K
Sun Sep 27, 2020 2:41 pm
Forum: Tech
Topic: Rickman Framed B44
Replies: 11
Views: 1388

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: 11
Views: 1388

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: 11
Views: 1388

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: 37
Views: 3423

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: 27
Views: 2708

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: 2131

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: 2131

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: 942

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