Search found 440 matches

by hhh
Wed Jul 08, 2020 4:50 pm
Forum: Tech
Topic: 441 Victor resurection
Replies: 30
Views: 1242
Flag: Canada

Re: 441 Victor resurection

If you're going to use a guitar E string as a thickness spec, it'd be wise to specify high or low, then at least you'd be in the ballpark. But of course, even then, several gauges are available for each. A high E can vary from 0.010" to 0.013".
by hhh
Mon Jul 06, 2020 8:09 pm
Forum: Tech
Topic: 441 Victor resurection
Replies: 30
Views: 1242
Flag: Canada

Re: 441 Victor resurection

Tried to edit my post above because I realized I should've written "advanced" instead of "retarded" but the board insisted on making a new post with the edit for some reason.

Don't know what happened there, but edited it for you :) mm
by hhh
Mon Jul 06, 2020 6:28 pm
Forum: Tech
Topic: T 140 tank on B25/T25
Replies: 6
Views: 280
Flag: Canada

Re: T 140 tank on B25/T25

I emailed him. He said 3 US gallons. I didn't think it looked very big.
by hhh
Mon Jul 06, 2020 4:58 pm
Forum: Tech
Topic: 441 Victor resurection
Replies: 30
Views: 1242
Flag: Canada

Re: 441 Victor resurection

Just a thought, a significant difference between Trumpet twins and Beesa singles is that the points cams rotate in different directions. If you have fitted a Trumpet ignition in error, it will automatically retard rather than advance. A Boyer can't recognize whether its rotor is turning clockwise o...
by hhh
Sat Jun 27, 2020 2:58 am
Forum: Tech
Topic: 441 Victor resurection
Replies: 30
Views: 1242
Flag: Canada

Re: 441 Victor resurection

Its 2 pickup coils and 2 magnets, same for both the singles and twins, the Boyer box is also the same so fully wasted spark in singles and twins. The electronics averages the 2 signals so guaranteeing a 360 degree gap between sparks ... Actually, there's only one signal because the pickup coils are...
by hhh
Mon Jun 08, 2020 7:45 pm
Forum: Tech
Topic: B25 1969 starting problems
Replies: 10
Views: 356
Flag: Canada

Re: B25 1969 starting problems

I wouldn't do anything until load testing the battery voltage. If that passes, Boyers can develop nasty problems from the slightest intermittent connections, either in their power wires, or the trigger wires, all the way to the stator plate itself. They can fail right where they are epoxied. Make su...
by hhh
Mon Jun 08, 2020 7:40 pm
Forum: Tech
Topic: B44 - Vape Electronic Ignition
Replies: 12
Views: 438
Flag: Canada

Re: B44 - Vape Electronic Ignition

Thanks for the clarification, minety, I should've written "force" instead of "field."
by hhh
Mon Jun 08, 2020 6:57 pm
Forum: Tech
Topic: B44 - Vape Electronic Ignition
Replies: 12
Views: 438
Flag: Canada

Re: B44 - Vape Electronic Ignition

For electronic ignitions you set them to full advance which is 34deg for B50 then they retard at lower revs till they reach the full advance at their set revs. the magnet movement has no effect on this. Your first sentence is true. Your second sentence is not; for it to be true, the laws of physics...
by hhh
Sun Jun 07, 2020 7:04 am
Forum: Tech
Topic: B44 - Vape Electronic Ignition
Replies: 12
Views: 438
Flag: Canada

Re: B44 - Vape Electronic Ignition

The magnetic advance curve is not optimum. It doesn't advance quickly enough and then keeps advancing when it should stop.
by hhh
Sat Jun 06, 2020 8:53 pm
Forum: Tech
Topic: B44 - Vape Electronic Ignition
Replies: 12
Views: 438
Flag: Canada

Re: B44 - Vape Electronic Ignition

For any analog magnetic reluctor style ignition, the most significant advance effect is from the laws of physics: the faster the magnet spins, the greater its emitted field at a given distance. This causes the ignition to trigger earlier as RPM increases because the same field is generated at an ear...
by hhh
Fri May 08, 2020 4:19 pm
Forum: Tech
Topic: Outer timing cover equivalences
Replies: 10
Views: 646
Flag: Canada

Re: Outer timing cover equivalences

kommando: I think you're right, but that applies to the inner cover, not the outer.
by hhh
Wed Mar 04, 2020 3:33 pm
Forum: Tech
Topic: Odd clutch bearing arrangement.
Replies: 9
Views: 1116
Flag: Canada

Re: Odd clutch bearing arrangement.

Aren't the rollers 5 thou short in the longitudinal direction?
by hhh
Wed Feb 19, 2020 4:17 pm
Forum: Tech
Topic: Mystery problem and BP is to blame!
Replies: 12
Views: 1861
Flag: Canada

Re: Mystery problem and BP is to blame!

Jeff K wrote:
Mon Feb 17, 2020 3:49 pm
...alcohol is hydroscopic and it absorbs moisture from the air...
The word you want is "hygroscopic." You can ameliorate this by adding methyl hydrate to your gas.
by hhh
Mon Feb 03, 2020 7:43 pm
Forum: Tech
Topic: B25 carb settings
Replies: 12
Views: 1313
Flag: Canada

Re: B25 carb settings

I much prefer the drill bit to any thing like a guitar string or tip cleaner because if you rotate it clockwise, it drills the crap out towards you instead of polluting the tiny internal passages which could cause a subsequent plugging.
by hhh
Mon Feb 03, 2020 5:09 pm
Forum: Tech
Topic: B25 carb settings
Replies: 12
Views: 1313
Flag: Canada

Re: B25 carb settings

I epoxy a #78 (0.016") drill bit into a WD-40 aerosol can snorkel tube and gently insert it while turning. I've used this tool dozens of times and I can't say I've ever needed to drastically re-adjust the mixture screw to compensate for enlarging the hole. However, it always cures bad idle and poor ...
by hhh
Mon Feb 03, 2020 5:02 pm
Forum: Tech
Topic: 1974 Gas tank on Ebay
Replies: 15
Views: 1603
Flag: Canada

Re: 1974 Gas tank on Ebay

They have been remaking them in India for a while now. They are even making the Europe only 3 gallon model. Too bad that it is only in steel, I would buy a alloy one in 3 gallon for the TR5T. https://www.ebay.com/itm/293233348992 Jeff I'm not sure I believe that one is actually 3 gallons. It's not ...
by hhh
Wed Jan 22, 2020 8:34 pm
Forum: Tech
Topic: B44 Primary Breather Pipe
Replies: 8
Views: 1436
Flag: Canada

Re: B44 Primary Breather Pipe

In the Triumph twins the engineers seemed to think it was sufficient to just remove the main bearing seal. They also drilled three small holes (1/8"?) near the lower chain run to allow the oil level to equalize between the sump and primary.
by hhh
Sat Dec 21, 2019 5:52 pm
Forum: Tech
Topic: RAR DRIVE CHAIN
Replies: 10
Views: 1549
Flag: Canada

Re: RAR DRIVE CHAIN

520 is correct, stay away from current Renolds chain. How about Renold chain, or is that what you meant? The quality is suspect, Renold's themselves no longer make any chain they say is suitable for motorcycle use, but allow one distributor to box up chain made by Renold with their brand on the box...
by hhh
Fri Dec 20, 2019 4:23 pm
Forum: Tech
Topic: B44 - 2nd Gear Mystery
Replies: 6
Views: 1264
Flag: Canada

Re: B44 - 2nd Gear Mystery

Jeff K wrote:
Mon Dec 16, 2019 11:36 pm
I think that BSA also changed the shifting cam to help out in 1969. I fitted one to a 1961 B40 and it did help.
Jeff
This was a huge improvement. I wouldn't consider using the old one as the engagement is less.
by hhh
Fri Dec 20, 2019 4:15 pm
Forum: Tech
Topic: RAR DRIVE CHAIN
Replies: 10
Views: 1549
Flag: Canada

Re: RAR DRIVE CHAIN

kommando wrote:
Wed Dec 18, 2019 8:11 am
520 is correct, stay away from current Reynolds chain.
How about Renold chain, or is that what you meant?
by hhh
Thu Dec 12, 2019 10:59 pm
Forum: Tech
Topic: Works Engine?
Replies: 9
Views: 1560
Flag: Canada

Re: Works Engine?

minetymenace wrote:
Wed Dec 11, 2019 6:38 pm
<135 to the forum Motobellini1098 .
...A number on its own doesn't mean a lot, photos and providence are what you need to to build an accurate picture...
I'm pretty sure you meant "provenance" but divine guidance certainly should never be turned down when working with BSAs :laugh
by hhh
Mon Nov 04, 2019 7:01 pm
Forum: Tech
Topic: 1000-Series 2/4-stroke Concentrics
Replies: 102
Views: 17446
Flag: Canada

Re: 1000-Series 2/4-stroke Concentrics

Thanks for the clarification. Since stock needles are steel, I had assumed you wanted a stronger needle jet made of steel for it to work against. However, the wearing of similar metals problem might arise if the alloys are very similar. So what you meant was to compensate for a worn needle jet with ...
by hhh
Sun Nov 03, 2019 6:31 pm
Forum: Tech
Topic: 1000-Series 2/4-stroke Concentrics
Replies: 102
Views: 17446
Flag: Canada

Re: 1000-Series 2/4-stroke Concentrics

I have no doubt that you know this; that your 1065 needle jet needs to be smaller to cure the bottom end richness and that it's effect will stretch as far up as the mid throttle position. I didn't go into all the gory detail in what I posted earlier, but I started with a #3 slide, machined it into ...
by hhh
Mon Oct 14, 2019 2:03 pm
Forum: Tech
Topic: Oil use by date
Replies: 13
Views: 2401
Flag: Canada

Re: Oil use by date

The oil itself doesn't wear out, but the additives certainly do. Here's a study that supports the viscosity degradation due to use: https://www.researchgate.net/publicatio ... ur-Wheeler .
by hhh
Sat Oct 12, 2019 4:15 pm
Forum: Tech
Topic: Oil use by date
Replies: 13
Views: 2401
Flag: Canada

Re: Oil use by date

Not only does oil not expire, it doesn't wear out. Let me qualify that: multi-grade oils in service will trend towards the lower (Winter) viscosity of their grade as they're used, e.g., 20W50 will eventually become 20 weight because the long chains that respond to temperature get sliced up and event...
by hhh
Sun Aug 18, 2019 3:57 pm
Forum: Tech
Topic: Sympathy for Victor
Replies: 5
Views: 1433
Flag: Canada

Re: Sympathy for Victor

Let me put it this way: I built a B44 engine out of mostly used swap meet parts, on a budget of CDN$500 all in, some on the edge of usability, like a big end with 0.003" play, and I've been thrashing it every which way from cold for about 11 years, and I can't kill it.
by hhh
Sat Aug 10, 2019 5:22 pm
Forum: Tech
Topic: B44 to 82mm
Replies: 9
Views: 2420
Flag: Canada

Re: B44 to 82mm

Does anyone sell an 82mm barrel and piston kit ready to go for a B44 (similar to Burton Bike Bits' 84mm kit)?
by hhh
Wed Jul 03, 2019 3:29 pm
Forum: Tech
Topic: Conical rear hub offset.
Replies: 18
Views: 3357
Flag: Canada

Re: Conical rear hub offset.

Zuff, yes, that along with the rim width (which he'll obviously be able to measure) will give the builder what he needs to set the offset. You'll want to measure from the mating surface of the sprocket where it meets the hub to the frame tube center-line.
by hhh
Tue Jul 02, 2019 6:08 pm
Forum: Tech
Topic: Conical rear hub offset.
Replies: 18
Views: 3357
Flag: Canada

Re: Conical rear hub offset.

It may be easier to use the frame top tube center-line rather than the front wheel for alignment. It should be dead center in the frame (not the swing arm.)
by hhh
Mon Jul 01, 2019 4:22 pm
Forum: Tech
Topic: Conical rear hub offset.
Replies: 18
Views: 3357
Flag: Canada

Re: Conical rear hub offset.

The offset only determines the position of the tire center in the frame. The chain alignment is set solely by the spacers on the axle and the swingarm positioning. Offset is normally measured from the hub surface (where the sprocket attaches) to the rim flange. There should be a standard figure avai...
by hhh
Sun Jun 23, 2019 6:40 pm
Forum: Tech
Topic: Tooth found in gauze when changing oil
Replies: 6
Views: 2039
Flag: Canada

Re: Tooth found in gauze when changing oil

It has to be from the cam drive or oil pump. How long is it? Either way, that's not good obviously. I would at a minimum pull the inner cover to investigate. You can do this without pulling the primary apart as detailed somewhere in this forum.
by hhh
Tue May 28, 2019 5:55 pm
Forum: Tech
Topic: b25ss timing cover bung plug/past shortage of B50 kickstart quadrants
Replies: 17
Views: 3726
Flag: Canada

Re: b25ss timing cover bung plug

I'd be suspicious that a centered machining job were factory! This cover with the same part number has the boss but no hole:

https://www.ebay.com/itm/BSA-B25-B44-Ou ... SwxYxUv~CG
by hhh
Thu May 02, 2019 7:10 pm
Forum: Tech
Topic: Truckle slide
Replies: 20
Views: 4952
Flag: Canada

Re: Truckle slide

Thanks for the clarification. I think what's being achieved is a more linear opening rate, i.e., more gradual from idle to small opening.
by hhh
Thu May 02, 2019 2:54 pm
Forum: Tech
Topic: Truckle slide
Replies: 20
Views: 4952
Flag: Canada

Re: Truckle slide

So the radius is upside down, i.e., it parallels the the shape of the top of the throat?
by hhh
Thu May 02, 2019 1:14 am
Forum: Tech
Topic: Truckle slide
Replies: 20
Views: 4952
Flag: Canada

Re: Truckle slide

David Taylor wrote:
Thu May 02, 2019 1:00 am
The filed part is just about 1mm to 1.5mm deep and should follow the radius of the carb throat.
I don't understand this part. It looks like a tiny "mouse hole" in the bottom of the port side of the slide. Where does the radius of the carb throat come into it? Thanks.
by hhh
Mon Apr 29, 2019 8:20 pm
Forum: Tech
Topic: B50 doesn't like tickling
Replies: 6
Views: 2130
Flag: Canada

Re: B50 doesn't like tickling

My B50 doesn't care if you tickle it or not, but starts first kick cold if you raise the throttle stop screw 3/4 turn or so.
by hhh
Fri Apr 26, 2019 3:33 pm
Forum: Tech
Topic: Time saver removing outer timing cover
Replies: 0
Views: 2421
Flag: Canada

Time saver removing outer timing cover

I discovered that the outer timing cover can be removed and replaced without removing the kicker arm. I was surprised to discover that if you hold the kicker lever horizontal towards the back of the back of the bike, it allows clearance for the kicker stop pin to locate, and the spring fixed end loc...
by hhh
Fri Apr 26, 2019 2:06 pm
Forum: Tech
Topic: B25 ignition advance curve
Replies: 2
Views: 1374
Flag: Canada

Re: B25 ignition advance curve

I think that curve is a problem. It should be shifted about 1000 RPM to the left.
by hhh
Tue Apr 23, 2019 3:16 pm
Forum: Tech
Topic: 1000-Series 2/4-stroke Concentrics
Replies: 102
Views: 17446
Flag: Canada

Re: 1000-Series 2/4-stroke Concentrics

Isn't Colourtune only for idle adjustment? If you were to run it through the range, wouldn't there be a risk of detonation due to it being the wrong heat range?
by hhh
Fri Apr 12, 2019 6:16 pm
Forum: Tech
Topic: 1000-Series 2/4-stroke Concentrics
Replies: 102
Views: 17446
Flag: Canada

Re: 1000-Series 2/4-stroke Concentrics

I'm at sea level with a 1974 850 with slotted spray tubes in probably slightly too tightly sleeved 932s, peashooters with no balance pipe, 9:1ish compression and it likes 230 mains.