Search found 489 matches

by Jack Gifford
Fri May 17, 2019 6:10 am
Forum: Off topic
Topic: Crankshaft experiment
Replies: 153
Views: 21246
Flag: United States of America

Re: Crankshaft experiment

Okay beat- I'll depend on you to tell me what's missing! There's a lot to be done, but I've decided how to approach a few things. The longer engine/drivetrain only leaves room for a 4" ctr-to-ctr driveshaft! I'll take the most expedient solution- I'll forego the rear suspension to obviate the need f...
by Jack Gifford
Thu May 16, 2019 5:18 am
Forum: Off topic
Topic: Crankshaft experiment
Replies: 153
Views: 21246
Flag: United States of America

Re: Crankshaft experiment

After some more test-runningl last month, it's time to start fitting the engine into the lakester. Proceeding with baby-steps... :roll:
by Jack Gifford
Tue May 14, 2019 5:01 am
Forum: Parts & Bikes wanted
Topic: B44 Rearset footrests wanted - any ideas / inspiration?
Replies: 2
Views: 111
Flag: United States of America

Re: B44 Rearset footrests wanted - any ideas / inspiration?

I accomplished a small amount of rearsetting (3"-4"?) on a B50T by doing a little machining on the originals and re-attaching them. I don't remember the details, but it wasn't very difficult. I doubt that I took any pictures, but I'll look.

Only found a couple photos, but no details of the pegs.
by Jack Gifford
Wed May 01, 2019 5:58 am
Forum: Off topic
Topic: Star
Replies: 184
Views: 14776
Flag: United States of America

Re: Star

Thanks for posting tbe link to the Hazel Raines story- quite interesting.
by Jack Gifford
Mon Apr 29, 2019 5:11 am
Forum: Tech
Topic: Kick-start aid
Replies: 8
Views: 271
Flag: United States of America

Kick-start aid

Interesting article in May/Jun edition of Motorcycle Classics about installation of the new KickMagic pneumatic starting assist (made by Classic Bike Experience in Essex VT). If it had been available four years ago I would probably not have parted with the B50T. Anybody here tried the KickMagic?
by Jack Gifford
Mon Apr 29, 2019 4:47 am
Forum: Off topic
Topic: Star
Replies: 184
Views: 14776
Flag: United States of America

Re: Star

... aren't the leading link forks naturally anti-dive?... Only if the brake reaction torque is to the leading link. Side note: old, imprecise, sticky telescopics were also somewhat anti-dive; too bad they didn't have any compliance... I agree that [ideally] beat's torque link should be centered on ...
by Jack Gifford
Sun Apr 28, 2019 6:48 am
Forum: Off topic
Topic: Star
Replies: 184
Views: 14776
Flag: United States of America

Re: Star

Minety must have cheated... :cry:
by Jack Gifford
Fri Apr 26, 2019 6:17 am
Forum: Off topic
Topic: Star
Replies: 184
Views: 14776
Flag: United States of America

Re: Star

337 lb. dry (153.2 kg)
by Jack Gifford
Thu Apr 25, 2019 5:54 am
Forum: Off topic
Topic: Star
Replies: 184
Views: 14776
Flag: United States of America

Re: Star

:ban :ban :ban
by Jack Gifford
Tue Apr 23, 2019 5:55 am
Forum: Off topic
Topic: Star
Replies: 184
Views: 14776
Flag: United States of America

Re: Star

Thanks for the picture. Clever way to obtain anti-dive adjustment!
by Jack Gifford
Sun Apr 21, 2019 6:36 am
Forum: Off topic
Topic: Star
Replies: 184
Views: 14776
Flag: United States of America

Re: Star

Nice work beat!
Any picture of the adjustable-anti-dive scheme?
by Jack Gifford
Thu Apr 18, 2019 6:23 am
Forum: Off topic
Topic: Star
Replies: 184
Views: 14776
Flag: United States of America

Re: Star

Serious question for beat- I'm surprised at the lack of any protection of the transistor's E/C junction from the inductive voltage spike as primary coil current is interrupted. I'm guessing your coil will be low-turns-ratio (thus somewhat-low-inductance primary), but what magnitude will the voltage ...
by Jack Gifford
Wed Apr 17, 2019 6:20 am
Forum: Off topic
Topic: Star
Replies: 184
Views: 14776
Flag: United States of America

Re: Star

minetymenace wrote:
Tue Apr 16, 2019 7:20 am
... Despite granting you guys independence...
Oh?
by Jack Gifford
Wed Apr 17, 2019 6:17 am
Forum: Off topic
Topic: Star
Replies: 184
Views: 14776
Flag: United States of America

Re: Star

Thanks for the details.
by Jack Gifford
Tue Apr 16, 2019 4:55 am
Forum: Off topic
Topic: Star
Replies: 184
Views: 14776
Flag: United States of America

Re: Star

C,B,E == Collector, Base, Emitter (transistor leads) beat- don't you want a resistor (>= 1k ohm) to reduce base current? It looks like you plan to have 12v going through the points and directly to the base of the transistor- which will probably cook the transistor. Or is that space in the box meant ...
by Jack Gifford
Sun Apr 07, 2019 4:27 am
Forum: Tech
Topic: Imperial thread sizes
Replies: 16
Views: 470
Flag: United States of America

Re: Imperial thread sizes

WM20- Thanks for the BSA history. :thumb
by Jack Gifford
Tue Apr 02, 2019 5:39 am
Forum: News
Topic: Stan has been causing trouble for 75 Years.
Replies: 15
Views: 2004
Flag: United States of America

Re: Stan has been causing trouble for 75 Years.

... Stan is one of the oldest members here at the forum. Just beaten by Commando by 3 hours... I'm not an old timer on this site, and I'm probably viewed as an "outsider", but apparently I've got 3 years on Stan. :shock: [in '59 I commuted to work and college on a '40 H-D] Keep up the good work Sta...
by Jack Gifford
Mon Mar 04, 2019 5:33 am
Forum: Off topic
Topic: Slickshift
Replies: 1
Views: 278
Flag: United States of America

Slickshift

Was reading a 1959 article about the "new" Triumph Slickshift system. Seems to be a good idea- and Bob Greene had good words about it after competing in the Big Bear hare-and-hound event that year. Anybody here have experience with it? I'm surprised I never heard more about it.
by Jack Gifford
Thu Feb 28, 2019 6:24 am
Forum: Off topic
Topic: Star
Replies: 184
Views: 14776
Flag: United States of America

Re: Star

Are 2 wheel drive sidecar rigs raced anywhere?
by Jack Gifford
Tue Feb 19, 2019 6:10 am
Forum: Tech
Topic: Electric Start
Replies: 623
Views: 92302
Flag: United States of America

Re: Electric Start

BasilF wrote:
Mon Feb 18, 2019 8:19 am
... One of these batteries... http://bikeaholics.co.uk/magento/index. ... prod_info2
Thanks for the posting. It looks like lithium ion batteries are finally becoming more affordable.
by Jack Gifford
Sun Feb 17, 2019 7:29 am
Forum: Tech
Topic: Electric Start
Replies: 623
Views: 92302
Flag: United States of America

Re: Electric Start

:grin: :grin: :grin: :grin:
by Jack Gifford
Thu Jan 31, 2019 6:29 am
Forum: Tech
Topic: Electric Start
Replies: 623
Views: 92302
Flag: United States of America

Re: Electric Start

Great progress! :thumb
by Jack Gifford
Mon Jan 07, 2019 6:03 am
Forum: Off topic
Topic: Marooned on a desert island
Replies: 3
Views: 447
Flag: United States of America

Re: Marooned on a desert island

Ya' got me... :oops:
by Jack Gifford
Sun Jan 06, 2019 5:52 am
Forum: Off topic
Topic: Star
Replies: 184
Views: 14776
Flag: United States of America

Re: Star

I agree with Minety on the gussets. Except that they are more effective when attached to the "faces" of the tubes rather than to the "insides" of the tubes (ask any builder of driver cages for race cars).
by Jack Gifford
Thu Jan 03, 2019 6:41 am
Forum: Off topic
Topic: Star
Replies: 184
Views: 14776
Flag: United States of America

Re: Star

beat wrote:
Wed Jan 02, 2019 9:16 pm
... abouth like this ??...
Yes, that's what I was thinking.
What are you thinking for swing arm strength in the horizontal plane?
by Jack Gifford
Tue Jan 01, 2019 6:55 am
Forum: Off topic
Topic: Star
Replies: 184
Views: 14776
Flag: United States of America

Re: Star

Tying the two bends together would fully triangulate the arm (2 triangles with a common side).
by Jack Gifford
Tue Dec 25, 2018 5:27 am
Forum: News
Topic: Merry Christmas
Replies: 8
Views: 696
Flag: United States of America

Re: Merry Christmas

Merry Christmas to all! :smile:

Already got a nice gift, thanks to a helping hand from my spouse; located and remedied the elusive "klunk" in the front end of my winter-beater car! :grin:
by Jack Gifford
Wed Dec 19, 2018 6:20 am
Forum: Int BSA Rally and other meetings
Topic: New Year's Day Meeting 2019
Replies: 22
Views: 1775
Flag: United States of America

Re: New Year's Day Meeting 2019

This yank would phonetically spell "Gloucestershire" as "Glous-ter-shur". No?

But don't ask me to spell the name you pronounce as "Fan-shaw". :roll: ["Featherstone"?]
by Jack Gifford
Thu Dec 13, 2018 6:59 am
Forum: Off topic
Topic: The science of engine combustion.
Replies: 15
Views: 1384
Flag: United States of America

Re: The science of engine combustion.

Okay, I'll be a sucker and try, although I'm definitely not an "expert"... 1> In terms of speed of fuel mass burning speed, I think that a rich mixture is faster. However, the greater mass of fuel to burn causes the flame front speed to be slower, which explains why a "fat" mixture is "safer" regard...
by Jack Gifford
Sun Dec 02, 2018 6:35 am
Forum: Off topic
Topic: When I grow up.
Replies: 3
Views: 554
Flag: United States of America

Re: When I grow up.

Made me smile! :smile:
by Jack Gifford
Sun Dec 02, 2018 6:32 am
Forum: Off topic
Topic: Star
Replies: 184
Views: 14776
Flag: United States of America

Re: Star

That fork will provide significant anti-dive.
I liked the Earl's fork on my Horex- zero stiction and just the "right" amount of anti-dive.
by Jack Gifford
Wed Nov 07, 2018 6:34 am
Forum: Off topic
Topic: Crankshaft experiment
Replies: 153
Views: 21246
Flag: United States of America

Re: Crankshaft experiment

Engine is going back together now. You could say it was merely a head gasket failure, but it was due to something I missed during the last teardown. I had concentrated on repairing the torched spots in cylinders 2 & 3, and didn't notice that the detonation had "lifted" the middle of the head. Yester...
by Jack Gifford
Wed Nov 07, 2018 6:21 am
Forum: Off topic
Topic: Star
Replies: 184
Views: 14776
Flag: United States of America

Re: Star

beat wrote: ... Find out best jokes form...
A yoke holds the forks.
A joke is a funny story.
I realize that your 'J' sounds like our 'Y'. But I'm sure your finished yokes won't be a joke. :smile:
by Jack Gifford
Sun Nov 04, 2018 4:31 am
Forum: Off topic
Topic: Star
Replies: 184
Views: 14776
Flag: United States of America

Re: Star

Approximate numbers-
50% of 29 AH = 15 AH
15 AH / 0.5 hr = 30 A
:?: :?: :?:
Hard to believe an ignition system takes 30A
by Jack Gifford
Thu Nov 01, 2018 4:51 am
Forum: Off topic
Topic: Crankshaft experiment
Replies: 153
Views: 21246
Flag: United States of America

Re: Crankshaft experiment

I did get to observe live data of air/fuel ratios on the dyno, but the laptop had an "SD card error" so no logs were created. I don't yet have copies of the dyno's logs, so I can't yet comment on the engine's performance. We did manage to tweak port nozzle sizes to even out the four cylinders (EGTs ...
by Jack Gifford
Sat Oct 20, 2018 6:08 am
Forum: Off topic
Topic: Crankshaft experiment
Replies: 153
Views: 21246
Flag: United States of America

Re: Crankshaft experiment

Dyno scheduled for 8AM Friday the 26th.
I'll be using the dyno shop's boost pressure sensor and logging, which I know works okay. So the main thing I'll be logging (and watching) on the laptop will be air/fuel ratios.
by Jack Gifford
Sat Oct 13, 2018 6:58 am
Forum: Off topic
Topic: Crankshaft experiment
Replies: 153
Views: 21246
Flag: United States of America

Re: Crankshaft experiment

Yes, vibration and RFI are possibilities. I used twisted pairs for all sensor leads, but who knows what interference from a high tension magneto can do.
by Jack Gifford
Tue Oct 09, 2018 5:03 am
Forum: Off topic
Topic: Crankshaft experiment
Replies: 153
Views: 21246
Flag: United States of America

Re: Crankshaft experiment

No secrets. Methanol fuel. Fuel/air ratio, as I understand, should be about 5:1 under full throttle maximum load. With no load other than engine acceleration (as throttle was "hammered") was about in the range of 3:1 to 4.5:1 during the test run. I'm mystified by the lack of logging of manifold pres...
by Jack Gifford
Mon Oct 08, 2018 4:55 am
Forum: Off topic
Topic: Crankshaft experiment
Replies: 153
Views: 21246
Flag: United States of America

Re: Crankshaft experiment

Test run completed- no glitches! :grin: Great throttle response- quick jabs showed about 6,000 RPM (up to 6,400 per the log). No leaks (fuel/oil/coolant) nor strange noises. Log shows air/fuel ratios about where expected- safely "fat" as planned. All data got logged except boost pressure (hardware? ...
by Jack Gifford
Sun Oct 07, 2018 5:34 am
Forum: Off topic
Topic: Star
Replies: 184
Views: 14776
Flag: United States of America

Re: Star

A many-person sidecar? :!: