Search found 936 matches

by koncretekid
Sat Dec 19, 2020 5:20 pm
Forum: News
Topic: Stan Millard
Replies: 20
Views: 1656

Re: Stan Millard

One of my mentors from my start in racing the B50's, but I never got the chance to meet him. Talked to him on the phone, traded parts and ideas. I'll never forget when I lunched the transmission out the bottom of my cases and he said "just weld it back together - - piece of cake." I sent him the cas...
by koncretekid
Tue Nov 24, 2020 1:02 pm
Forum: Project bikes
Topic: B40 Project
Replies: 8
Views: 1119

Re: B40 Project

You guys lost me on that. Do they serve Spotted Dick at the Spotted Cow?
by koncretekid
Tue Nov 24, 2020 12:53 pm
Forum: Tech
Topic: Primary Case Breather
Replies: 6
Views: 931

Re: Primary Case Breather

I have found in the past that the oil tank vent which hangs down the front down tube often leaks after a spirited ride. I teed that tank vent into the main breather hose which is routed to the back of the frame. You don't have to put the gauze filter on the end of the hose, but it may drip. Here is ...
by koncretekid
Sat Nov 21, 2020 12:24 pm
Forum: Tech
Topic: clutch plates
Replies: 4
Views: 639

Re: clutch plates

Friction plate first. And if you machine off the facing (friction material) and fit that plate in the bottom, steel surface against the basket, and your plates are worn down just a bit, you can actually fit an extra friction and an extra steel plate to make it a 6 plate (6 friction, 6 steel) clutch,...
by koncretekid
Sat Nov 14, 2020 8:00 pm
Forum: Tech
Topic: Fitting Allen screws to rocker box on B50.
Replies: 35
Views: 6388

Re: Fitting Allen screws to rocker box on B50.

You don't need to replace any of the studs to remove the rocker box on a B44. You just have to rotate the box up and over the studs. But on a B50, there is an additional frame brace that is close to the rocker box. I replaced all the studs and recessed them on my B50 tracker with Allen head bolts. Y...
by koncretekid
Thu Nov 12, 2020 1:44 pm
Forum: Tech
Topic: Clutch Pushrod???
Replies: 17
Views: 1837

Re: Clutch Pushrod???

A word of caution about the clutch pushrod and ball - - do not hold the clutch in while revving the motor for more than a few seconds. I have found doing dyno tuning that if you accelerate the motor up to maximum rpm, and pull in the clutch while the dyno wheel continues to spin the wheel and hence ...
by koncretekid
Mon Nov 09, 2020 1:03 pm
Forum: Tech
Topic: Clutch Pushrod???
Replies: 17
Views: 1837

Re: Clutch Pushrod???

"7/32 is very close to 5.5 mm- which is a standard, and possibly K*wasak* head stock race size" I believe that many of the older Japanese bikes, i.e. '60's and '70"s, used "inch" sized ball bearings (the balls, not the race sizes). All the H*nda ones I've ever measured were like .250" for example, n...
by koncretekid
Sun Nov 08, 2020 1:54 am
Forum: Tech
Topic: Clutch Pushrod???
Replies: 17
Views: 1837

Re: Clutch Pushrod???

7/32" ball bearings probably aren't that hard to find, but not in common hardware stores. I looked on eBay and found that some K*wasak* models used them for something or other. Got the part number off eBay and went to my local Kawi dealer who checked that number, went back to his storeroom and came ...
by koncretekid
Fri Oct 30, 2020 1:22 pm
Forum: Tech
Topic: Rebuild Compression
Replies: 26
Views: 1911

Re: Rebuild Compression

"Copper should be annealed at what we called dull or first red or cherry red This is not the bright pink cherry red but the dull almost maroon cherry red Which is why you do it in a dark place and stop when you can detect a red colour once the flame has been moved off the surface." Thanks for that B...
by koncretekid
Fri Oct 16, 2020 1:05 pm
Forum: Tech
Topic: B50 rear hub
Replies: 11
Views: 1271

Re: B50 rear hub

If the internal spacer is not original, it could have been made incorrectly. From memory, it looks like the reliefs on the ends aren't machined as deep as the bearings, which would prevent the offside one (which doesn't bear against anything) from seating deep enough. I don't have the exact size, bu...
by koncretekid
Fri Oct 16, 2020 12:50 pm
Forum: Tech
Topic: 1974 tr5mx Engine Mounting Bolts
Replies: 7
Views: 904

Re: 1974 tr5mx Engine Mounting Bolts

This will work and make a few extra ones: https://www.amazon.com/Threaded-Rod-All ... 860&sr=8-2
Tom
by koncretekid
Mon Oct 05, 2020 1:24 pm
Forum: Tech
Topic: Fork Rebuild Questions
Replies: 8
Views: 1041

Re: Fork Rebuild Questions

Heat and impact wrench.... Bottom nuts are aluminum, so heating will tend to expand the nuts more than the stanchions. But heating to break the seal may help, but I would heat the entire end and plunge into a bucket of water for a few seconds, as the aluminum should contract at a faster rate than t...
by koncretekid
Wed Sep 30, 2020 6:04 pm
Forum: Tales Of Woe
Topic: TR5MX clutch/kickstart issue
Replies: 25
Views: 4498

Re: TR5MX clutch/kickstart issue

MM already mentioned this, but he asked if the nut was tight. I forgot to mention that if the nut comes loose, the gear rack cannot push the clutch release rod and you will get the exact same consequence - - the clutch will feel rock solid as it hits the nut before it contacts the rod. Also, quite s...
by koncretekid
Tue Sep 29, 2020 10:04 pm
Forum: Tales Of Woe
Topic: When you're at your Wits End ..it could be worse
Replies: 5
Views: 1203

Re: When you're at your Wits End ..it could be worse

It Could Have Been Worse - - it could have then caught on fire and you and your bud would have been toasting roasted nuts with your bitters!
by koncretekid
Mon Sep 28, 2020 1:52 pm
Forum: Tales Of Woe
Topic: TR5MX clutch/kickstart issue
Replies: 25
Views: 4498

Re: TR5MX clutch/kickstart issue

The pinion gear on the end of the mainshaft is a 2-gear affair where the outer gear under the nut is fixed and the inner gears spins freely on a steel sleeve with a light spring that keeps it engaged to the outer gear. The teeth are designed to grab when the kickstart is actuated and release as the ...
by koncretekid
Sat Sep 26, 2020 1:16 am
Forum: Tech
Topic: GPS Speedometer
Replies: 11
Views: 2078

Re: GPS Speedometer

. Hi Tom . Can you provide any further update on the performance of the GPS speedo? Thinking of getting one for my latest project but concerned about how easily the signal is picked up as the antennae is meant to have 'clear view of sky'. I cannot provide any update because I have never been able t...
by koncretekid
Tue Aug 18, 2020 1:57 pm
Forum: Tech
Topic: flywheel balancing
Replies: 15
Views: 1728

Re: flywheel balancing

I think I've seen photos of balancing with the connecting rod in place. How about putting crankshaft with connecting rod attached in a lathe and lock the spindle of the lathe with the connecting rod at right angles to the crank (rod will be level thru the centerlines of the ends). Then weigh the sma...
by koncretekid
Sun Aug 16, 2020 2:09 pm
Forum: Tech
Topic: flywheel balancing
Replies: 15
Views: 1728

Re: flywheel balancing

The B50 is much more difficult to balance because you first have to take off at least one crankpin nut and disassemble the crank, remove the rod and rod bearing, and weigh each end of the rod while it is level.You can do it with one very accurate scale and a support under the other end, and then do ...
by koncretekid
Thu Aug 13, 2020 12:12 pm
Forum: Tech
Topic: Gearbox vent 1971 B25T
Replies: 10
Views: 1559

Re: Gearbox vent 1971 B25T

Clutch oil gets very black. Is it possible that the bushing in the sleeve gear is worn enough that clutch oil is contaminating the gearbox oil? This would be quite possible if neither of the primary cover access covers is vented and the timing access cover is well sealed on the non-primary vented co...
by koncretekid
Sat Aug 01, 2020 12:54 am
Forum: Project bikes
Topic: 74 TR5 MX Project For Ken
Replies: 115
Views: 14875

Re: 74 TR5 MX Project For Ken

One thing you need to be aware of is that Buchanans always include a slip of paper that seems to indicate "80 in-lbs" torque may be required for heavy bikes. I don't think that's necessary, but if you call them, they will tell you the correct torque for your application.
Tom
by koncretekid
Thu Jul 09, 2020 11:31 am
Forum: Tech
Topic: 441 Victor resurection
Replies: 45
Views: 6025

Re: 441 Victor resurection

The rotor loose on its hub is common. I just had to replace one yesterday. With all your bikes, I'll assume you have a front wheel chock. So put the front wheel in one and make sure it's stable and jack the rear wheel off the floor. Put the bike in 4th gear and take the spark plug out. Now rotate th...
by koncretekid
Wed Jul 08, 2020 12:04 pm
Forum: Tech
Topic: 441 Victor resurection
Replies: 45
Views: 6025

Re: 441 Victor resurection

The usual starting procedure is to flood the carb, turn the throttle stop in 1 turn (from previously set idle setting), and kick it with the throttle closed. Because you don't know the correct idle setting, start with the throttle fully closed and then open it just a hair (a Guitar E string should b...
by koncretekid
Mon Jul 06, 2020 12:34 pm
Forum: Tech
Topic: 441 Victor resurection
Replies: 45
Views: 6025

Re: 441 Victor resurection

"With everything together I can tickle the carb, then kick it through with the throttle wide open and the compression release compressed. On the 4th kick it will backfire" I'm not sure I'm interpreting your procedure correctly, but the compression release is to be used only to get the motor past top...
by koncretekid
Mon Jun 29, 2020 11:45 am
Forum: News
Topic: It's the big one
Replies: 12
Views: 2890

Re: It's the big one

"sexigenarian" definition - - an extremely sexy sexagenarian!
by koncretekid
Sat Jun 20, 2020 12:08 pm
Forum: Tech
Topic: 441 Victor resurection
Replies: 45
Views: 6025

Re: 441 Victor resurection

Sometimes the bolt that holds the ignition rotor on its taper is too long which allows the rotor to move. If you take the ignition stator off, try to move the rotor. If it moves, that's the problem.
Tom
by koncretekid
Tue Jun 16, 2020 11:20 am
Forum: Project bikes
Topic: LOBE 2 20-21
Replies: 81
Views: 8561

Re: LOBE 2 20-21

koncretekid the answer to you first question will be fixed, but not low, the answer to your second question is a little bit shorter than the length of string. Anita is the lady to speak to, I spoke to her yesterday on the same subject, but I am not in a hurry. dos it need it ?? See here . MM, I'n n...
by koncretekid
Mon Jun 15, 2020 10:44 pm
Forum: Project bikes
Topic: LOBE 2 20-21
Replies: 81
Views: 8561

Re: LOBE 2 20-21

What is the cost of Cook's conversion and when could he have it completed? I would have to know that to make that decision.
by koncretekid
Mon Jun 15, 2020 11:51 am
Forum: Project bikes
Topic: T 25 Project
Replies: 7
Views: 1554

Re: T 25 Project

Isn't PE 1971? Of all the B50 parts I have, they are in Colorado and I can't get there now. I have a set of cases that need a weld repair where the sump passage to the oil pump has been punctured. I won't be there until this fall but I'll keep you in mind. Other than that, E & V Engineering will hav...
by koncretekid
Mon Jun 08, 2020 9:26 pm
Forum: Off topic
Topic: Lock down projects
Replies: 45
Views: 5255

Re: Lock down projects

The trail of my Bonneville bike (B50 now 600cc) is about 4-1/2" with a 30 degree rake angle.
by koncretekid
Mon Jun 08, 2020 2:33 am
Forum: Project bikes
Topic: LOBE 2 20-21
Replies: 81
Views: 8561

Re: LOBE 2 20-21

I thought 465cc because I thought you might use the B25 crankshaft (for high rpm) instead and run it in the 500cc class. Because you're starting with the B25/TR25 cases, you won't have the third main bearing unless you plant to weld onto the cases to carry the 3rd bearing. That long stroke crank sho...
by koncretekid
Mon Jun 08, 2020 2:24 am
Forum: Off topic
Topic: Lock down projects
Replies: 45
Views: 5255

Re: Lock down projects

Thanks for your explanation. I have considered putting a sidecar on the Bonneville land speed bike, but I don't think I'll go with "0" trail!
Tom
by koncretekid
Sun Jun 07, 2020 10:34 am
Forum: Off topic
Topic: Lock down projects
Replies: 45
Views: 5255

Re: Lock down projects

From Cycle World: "Trail (B) is measured in distance (inches or millimeters) between the point of the front wheel’s contact with the ground and a line drawn through the axis of the steering head. Under normal operation, this contact point is always some distance behind the projected line—somewhere b...
by koncretekid
Sat Jun 06, 2020 11:38 pm
Forum: Off topic
Topic: Lock down projects
Replies: 45
Views: 5255

Re: Lock down projects

Beat,
Does your new front suspension on your sidecar rig have negative trail? Looks like the front axle may be out in front of the steering axis, but I can't tell from the photo.
Tom
by koncretekid
Sat Jun 06, 2020 10:59 pm
Forum: Project bikes
Topic: LOBE 2 20-21
Replies: 81
Views: 8561

Re: LOBE 2 20-21

465cc ?
by koncretekid
Fri Jun 05, 2020 1:14 am
Forum: Tech
Topic: valve lifter wear
Replies: 6
Views: 1294

Re: valve lifter wear

The indent on the exhaust rocker is quite common, as there is no return spring on the decompressor lever. If you look at the motor when it's running, you can see the lever bouncing back and forth because the cable doesn't retract fully on some and even leaving excess slack won't solve the problem. A...
by koncretekid
Wed Jun 03, 2020 11:25 am
Forum: Tech
Topic: GPS Speedometer
Replies: 11
Views: 2078

Re: GPS Speedometer

Jack,
It's an actual needle, but of course, it only goes to 200 kph, or 120 mph.
Tom
by koncretekid
Sun May 31, 2020 2:42 pm
Forum: Tech
Topic: GPS Speedometer
Replies: 11
Views: 2078

GPS Speedometer

Whoops, I meant "speedometer" and I can't edit the topic! (Edit by mm: Your wish is my command) On my recently completed B44 parts bike, I needed a speedometer. Besides the cost of a working Smith's speedo, there are the speedo gearbox and cable to worry about. I noticed a post on Britbike.com by M...
by koncretekid
Wed May 27, 2020 10:30 pm
Forum: Tech
Topic: High ratio B50 rocker arms
Replies: 17
Views: 2416

Re: High ratio B50 rocker arms

B50 revised head
B50 revised head
B50 revised head.jpg (24.29 KiB) Viewed 2032 times
B50 revised head
B50 revised head
B50 revised head.jpg (24.29 KiB) Viewed 2032 times
I think the included valve angle on the B50 is about 67 degrees, so better than earlier 90 degrees. Here's one you could copy:

Also, you do need to open up the intake a bit:
My head by Ed V.
My head by Ed V.
by koncretekid
Wed May 27, 2020 10:29 pm
Forum: Tech
Topic: High ratio B50 rocker arms
Replies: 17
Views: 2416

Re: High ratio B50 rocker arms

I think the included valve angle on the B50 is about 67 degrees, so better than earlier 90 degrees. Here's one you could copy:
by koncretekid
Tue May 26, 2020 12:20 pm
Forum: Tech
Topic: High ratio B50 rocker arms
Replies: 17
Views: 2416

Re: High ratio B50 rocker arms

Ed Valiket makes them. You will then want to sand them down and polish them. You also have to open up the pushrod tunnel, as the pushrods now move at more extreme angles where they intersect the shorter ends of the rocker arms.
high ratio rocker arm
high ratio rocker arm
Tom

P.S. Has anyone heard from Stan lately?