Search found 75 matches

by bbenxe
Mon Oct 05, 2020 3:57 pm
Forum: Tech
Topic: Fork Rebuild Questions
Replies: 8
Views: 486

Re: Fork Rebuild Questions

I tried clamping it in the triple tree but it just ends up spinning. I have found on other bike that clamping the stanchion in the tree can squeeze it onto the nut, and so make an already firm grip even firmer. As other posters have suggested, shock is the answer here. I have used http://www.bikere...
by bbenxe
Fri Jul 10, 2020 2:39 pm
Forum: Tech
Topic: 441 Victor resurection
Replies: 45
Views: 4908

Re: 441 Victor resurection

Glad you've got it going. I use a 32mm JRC PWK on my B50 in MX spec and it works very well.
by bbenxe
Thu May 14, 2020 4:38 pm
Forum: Project bikes
Topic: Ben's B50T trail bike
Replies: 38
Views: 9959

Re: bbenxe's B50T flat/street tracker

As suspected I'm now certain I need to back the fork spring pre-load off a bit, and maybe soften the emulator spring preload too, but overarching reaction is one of immense pleasure to be out riding again, and great satisfaction with the changes I've made, especially suspension and footpeg position....
by bbenxe
Tue May 12, 2020 3:44 pm
Forum: Project bikes
Topic: Ben's B50T trail bike
Replies: 38
Views: 9959

Re: bbenxe's B50T flat/street tracker

bbenexe, you missed an IKB icon up on the downs! (The forum language is English but how hard is that to understand if you are not from these shores?) I'd say probably very. I believe you are on about the view to Isambard Kingdom Brunel's Clifton suspension bridge? I did point my camera that way too...
by bbenxe
Tue May 12, 2020 11:30 am
Forum: Project bikes
Topic: Ben's B50T trail bike
Replies: 38
Views: 9959

Re: bbenxe's B50T flat/street tracker

Bit of spare time in lockdown lead to a few jobs being ticked off the backlog, ready just in time for pleasure riding from tomorrow... Taller multi-rate rear shocks, longer stanchions with cartridge emulators hidden inside, new brake shoes, brake cable (without integral switch) and wheel bearings fr...
by bbenxe
Mon Apr 27, 2020 8:15 pm
Forum: Tech
Topic: 8 inch conical wheel gap at fork leg
Replies: 27
Views: 7070

Re: 8 inch conical wheel gap at fork leg

It seems the problem lies with the casting/machining of my brake plate. That or someone has been let loose on it. The recess for the brake plate nut is only 4.5mm deep on mine, meaning the nut which is 6.2mm stands proud of the recess. A friend has measured theirs at 6.5mm deep. The raised area of t...
by bbenxe
Sun Apr 26, 2020 9:28 pm
Forum: Project bikes
Topic: Ben's B50T trail bike
Replies: 38
Views: 9959

Re: bbenxe's B50T flat/street tracker

You're totally right Tom, shortening the top-out spring and a longer damper rod would both have the same effect of increasing travel - but only changing the top-out spring would affect the pre-load which is what I'm trying to do.

Ben
by bbenxe
Sun Apr 26, 2020 3:57 pm
Forum: Tech
Topic: 8 inch conical wheel gap at fork leg
Replies: 27
Views: 7070

Re: 8 inch conical wheel gap at fork leg

Well the cause (but not the solution yet) was staring me in the face. I'm confident everything hub and spindle related is correct. Moving the spindle between the fork legs gets me closer but the brake plate nut is contacting the slider before the anchor. These two points of the slider are in a plane...
by bbenxe
Sun Apr 26, 2020 1:16 pm
Forum: Project bikes
Topic: Ben's B50T trail bike
Replies: 38
Views: 9959

Re: bbenxe's B50T flat/street tracker

I'm not sure Tom, I could be wrong though. At static the springs are pushing on the top of the damper rod, which pushes on the top-out spring, which pushes on the bottom of the stanchions. I think the length of the damper rod only positions the slider relative to all that. You could decrease pre-loa...
by bbenxe
Sun Apr 26, 2020 1:06 pm
Forum: Tech
Topic: 8 inch conical wheel gap at fork leg
Replies: 27
Views: 7070

Re: 8 inch conical wheel gap at fork leg

Good point madsunday survivor - the stanchions are new and straight though. The yokes could be bent, but as the gap between the outer studs on the forks aligns with the indents on the spindle I believe this is not the case. Dissembled the hub again this morning for triple checking. Here's a photo ta...
by bbenxe
Sun Apr 26, 2020 11:43 am
Forum: Project bikes
Topic: Ben's B50T trail bike
Replies: 38
Views: 9959

Re: bbenxe's B50T flat/street tracker

Fitted the 1" longer stanchions with cartridge emulators inside and 19" replacement wheel, very pleased with how it looks, will have to wait and see for how they ride... IMG-20200425-WA0004.jpeg IMG_20200425_170857_294.jpg At the moment I think pre-load is too high at 20mm, will decrease by shorteni...
by bbenxe
Sat Apr 25, 2020 7:56 pm
Forum: Tech
Topic: 8 inch conical wheel gap at fork leg
Replies: 27
Views: 7070

Re: 8 inch conical wheel gap at fork leg

To resurrect an old topic...I have come across this issue myself, but I do have the abutment ring inside... I have verified the RH bearing is against the inner circlip, and that the abutment ring is between the spindle shoulder and bearing inner race. The abutment ring is 4.6mm deep. I am using seal...
by bbenxe
Fri Apr 10, 2020 9:35 pm
Forum: Project bikes
Topic: Ben's B50T trail bike
Replies: 38
Views: 9959

Re: bbenxe's B50T flat/street tracker

Oh dear... IMG-20200410-WA0010.jpeg IMG-20200410-WA0012.jpeg I blame whoever drilled these gaping "vents". 5 vents and one of them overlapped one of the 4 pre-existing holes in the hub. This appears to be where the crack emanated. Been riding it hard recently so quite glad I noticed it during lockdo...
by bbenxe
Mon Mar 30, 2020 9:16 am
Forum: Tech
Topic: Better OIF Damper rod piston ring
Replies: 16
Views: 2332

Re: Better OIF Damper rod piston ring

The emulator only fixes 1/2 the problem as they only provide compression damping and no rebound damping. You can get round this by turning one of the emulators upside down but then you get issues with flow rates due to each valve needing to provide double the damping. Or you buy four emulators and ...
by bbenxe
Thu Mar 05, 2020 4:04 pm
Forum: Project bikes
Topic: Ben's B50T trail bike
Replies: 38
Views: 9959

Re: bbenxe's B50T flat/street tracker

Bonjour Francois, apologies for late reply, I had not seen your message. Yes I am extremely pleased with my choice - starts and runs well, and the variety of jets and needles available make this a good choice for the tuner. I have not needed to change either as it ran extremely well straight out the...
by bbenxe
Wed Oct 09, 2019 12:02 pm
Forum: Project bikes
Topic: Ben's B50T trail bike
Replies: 38
Views: 9959

Re: bbenxe's B50T flat/street tracker

I should also share this exceptionally useful tool I found recently that lets you see the effect of changing jets, needle and needle position in the Keihin Carbs http://www.kyajet.de/index.php?lang=en You can choose the needle type (N427-46 or N427-48) and then changing the spec (e.g. JJH vs JJG) le...
by bbenxe
Wed Oct 09, 2019 11:56 am
Forum: Project bikes
Topic: Ben's B50T trail bike
Replies: 38
Views: 9959

Re: bbenxe's B50T flat/street tracker

can not find this needle Nr in the Mikuni book,- seams to be not comparable. beat Not surprised you can't find it in the Mikuni book Beat, you might have better luck in the Keihin though! I'm not sure whether it's N427-46 or the N427-48 needle in my 32mm PWK, I'll measure it tonight to check though...
by bbenxe
Mon Oct 07, 2019 9:13 pm
Forum: Project bikes
Topic: Ben's B50T trail bike
Replies: 38
Views: 9959

Re: bbenxe's B50T flat/street tracker

Can you disclose what main jet, idle/slow running jet & slide you have on your bike? Hi Claus, the technical data for the JRC PWK from Brill can be found on their site: http://brillbikeparts.co.uk/images/jets.gif for a B44 they recommend a 30mm body, 30 pilot and a 135 main with needle on the "cent...
by bbenxe
Mon Oct 07, 2019 11:01 am
Forum: Project bikes
Topic: Starfire 441
Replies: 91
Views: 18908

Re: Starfire 441

Mike A wrote: Mon Sep 09, 2019 4:49 pm [its basically a scrambler but used really for hillclimbs as we're somewhat lucky here in the West Country/Southwest with choice of venues.
Mike where do you go hill-climbing? I'm in Bristol and have done Prescott once on my B50 but am interested in more...
by bbenxe
Sun Oct 06, 2019 9:06 am
Forum: Project bikes
Topic: Ben's B50T trail bike
Replies: 38
Views: 9959

Re: bbenxe's B50T flat/street tracker

beat wrote: Thu Oct 03, 2019 3:21 pm what is the needle identification in your flatslide carb ??

beat
Hi Beat, my needle is marked JJH and is in P3. It's a 32mm "JRC PWK" that I sourced from BrillBikeParts in the UK.
by bbenxe
Wed Oct 02, 2019 8:56 pm
Forum: Project bikes
Topic: Ben's B50T trail bike
Replies: 38
Views: 9959

Re: bbenxe's B50T flat/street tracker

A quick update on my B50 since it's been a while. Not much of street tracker anymore... IMG_20180616_152622_773.jpg Many more happy miles in it's latest scrambler guise, including a razz up the hill at Prescott ( see here: https://www.youtube.com/watch?v=NjoeBWH31fk ) IMG-20180617-WA0023.jpg I snapp...
by bbenxe
Mon Sep 17, 2018 10:43 pm
Forum: Tech
Topic: Starting the Race bike! BSA B50
Replies: 29
Views: 7627

Re: Starting the Race bike! BSA B50

Allflatblack wrote: Started it and took it for a mile or two ride. Very Very fast bike.
Hurrah!
by bbenxe
Mon Sep 10, 2018 12:57 pm
Forum: Tech
Topic: Starting the Race bike! BSA B50
Replies: 29
Views: 7627

Re: Starting the Race bike! BSA B50

And that's a very smart looking fork brace! Is it a universal fit job or BSA/Triumph fork specific?
by bbenxe
Mon Sep 10, 2018 12:35 pm
Forum: Tech
Topic: Starting the Race bike! BSA B50
Replies: 29
Views: 7627

Re: Starting the Race bike! BSA B50

It sounds like you know the answer already, and it's not 'compression'. It did start the bike but it only ran at around 5000 rpm and died either side of 1/3 throttle. I felt that it is too lean so i re-jetted the carbs to a leaner setup B50 is fussy to start unless you've got the fuelling right. See...
by bbenxe
Sat Jul 14, 2018 9:56 am
Forum: Videos
Topic: Puddles and Tracks
Replies: 0
Views: 6036

Puddles and Tracks

In memory of the poor engine I've just blown ( see topic here: http://www.b50.org/phpBB2/viewtopic.php?f=3&t=8031 ) here are two videos of happier times: Flooded byways somewhere near Gloucester on the TET: https://www.youtube.com/watch?v=-AvqUGvKlR0 Running at Prescott Hill Climb this year: https:/...
by bbenxe
Sat Jul 14, 2018 9:30 am
Forum: Tech
Topic: Due a crank rebuild - what would you do...?
Replies: 5
Views: 2452

Re: Due a crank rebuild - what would you do...?

Thanks all for your input! Expecting heartache ahead then as I'm young and really enjoying learning and have every intention of doing the rebuild myself... Three points that made me glad I started the topic: 1) 1/2" longer rod: I understood the impacts on rocker box clearance and pushrods, but hadn'...
by bbenxe
Thu Jul 12, 2018 9:04 pm
Forum: Tech
Topic: Due a crank rebuild - what would you do...?
Replies: 5
Views: 2452

Due a crank rebuild - what would you do...?

Well the day after this photo I had a bottom end blowout 200 metres into the morning's riding and leaving a long black tyre mark in the road... 20180707_084229.jpg I haven't investigated any deeper than taking primary cover off yet as first I've had to repatriate the bike from darkest Cornwall, but ...
by bbenxe
Fri Jun 22, 2018 12:54 pm
Forum: Tech
Topic: info on rear mudguards
Replies: 6
Views: 2652

Re: info on rear mudguards

Hi Mark,

not sure about differences between road and MX, but AutoCycle Engineering in the UK make MX mudguards to original spec in chrome, alloy and stainless. I got an alloy set from them and very happy with it.

Ben
by bbenxe
Tue Jun 05, 2018 8:12 am
Forum: Project bikes
Topic: Ben's B50T trail bike
Replies: 38
Views: 9959

Re: bbenxe's B50T flat/street tracker

:laugh

Now can't decide whether I do want to use them to put that 19T sprocket on! Still wanted a taller gear riding home, but I wonder whether it would have made first too tall for the some of those trails...

We'll test it together in the South Wales section :thumb
by bbenxe
Mon Jun 04, 2018 7:34 pm
Forum: Videos
Topic: Deep water crossing
Replies: 3
Views: 2587

Deep water crossing

Crossing a flooded Gloucestershire byway on my B50 T. Got a bit deeper than I expected about two-thirds of the way across...

https://www.youtube.com/watch?v=-AvqUGvKlR0
by bbenxe
Mon Jun 04, 2018 7:32 pm
Forum: Project bikes
Topic: Ben's B50T trail bike
Replies: 38
Views: 9959

Re: bbenxe's B50T flat/street tracker

What a day out! B50 went fantastically well. Broke a clutch lever slipping in a cowpat... But jury rigged a pivot with a zip tie to get some more lanes done before heading home.

Video of the river crossing here: https://www.youtube.com/watch?v=-AvqUGvKlR0
by bbenxe
Thu May 31, 2018 3:28 pm
Forum: Project bikes
Topic: Ben's B50T trail bike
Replies: 38
Views: 9959

Re: bbenxe's B50T flat/street tracker

Got some proper tyres on as I'm going trail riding on the TET this weekend.

Bike's going well. Rubber mounted all the mudguards, but that gave them enough slack to move around just a little, but little was enough to start clattering into the chain and giving me a hell of a fright... Resolved now.
by bbenxe
Mon May 21, 2018 6:33 pm
Forum: Project bikes
Topic: Ben's B50T trail bike
Replies: 38
Views: 9959

Re: bbenxe's B50T flat/street tracker

Been putting lots of miles on the bike recently around Bristol and surrounding countryside, most recently on the VMCC SW Coast run, and out to the Redhill Classic Car and Bike shows. Here's a recent photo of the bike, frame all stripped back to blue now, MX panels fitted but not yet painted, and new...
by bbenxe
Wed May 09, 2018 3:15 pm
Forum: Tech
Topic: Fitting MX cam and 32mm carb - port match the head?
Replies: 5
Views: 2453

Re: Fitting MX cam and 32mm carb - port match the head?

Cheers Stu, gives me hope that I can spend more time enjoying happy riding and less time blowing money on jets... Almost makes me wonder why I'm doing it in the first place! Still very interested on people's opinions on whether leaving a step where the inlet would decrease in diameter from 33mm to 3...
by bbenxe
Mon May 07, 2018 7:49 pm
Forum: Tech
Topic: Fitting MX cam and 32mm carb - port match the head?
Replies: 5
Views: 2453

Fitting MX cam and 32mm carb - port match the head?

Hi folks, I'm about to fit an MX cam and gather the benefit is only really seen if you up the carb to 32mm - I've got a concentric 932 that would work but also a Mikuni TM33 pumper flatslide I'd like to try (yes I have seen the struggle Beat had getting his TM32 to work but reckon I can give it a go...
by bbenxe
Fri Apr 20, 2018 10:10 pm
Forum: Int BSA Rally and other meetings
Topic: International BSA B50 Meeting Paris 2018
Replies: 59
Views: 17285

Re: International BSA B50 Meeting

550km from Bristol. I'm interested... Camping?
by bbenxe
Tue Apr 17, 2018 10:38 pm
Forum: Tech
Topic: Fork Emulators
Replies: 22
Views: 6789

Re: Fork Emulators

Be very interested to hear more details on your S1000rr conversion. Part numbers in particular if you know them.

Are the two valves the same, but one upside down for rebound damping having removed the usual rebound control?

Thanks Kommando
by bbenxe
Tue Apr 17, 2018 8:56 pm
Forum: Tech
Topic: Fork Emulators
Replies: 22
Views: 6789

Re: Fork Emulators

Any further feedback from riders who've fitted emulators in their forks? Undertaking some spirited riding this weekend looking out for suspension quirks having just read Paul Thede's "Motorcycle Suspension Bible" I noticed a real twitchiness in the handle bars hitting square edged bumps (e.g. big ca...
by bbenxe
Tue Apr 03, 2018 11:14 am
Forum: Int BSA Rally and other meetings
Topic: Unit Singles at Red Marley 2018
Replies: 7
Views: 3123

Re: Unit Singles at Red Marley 2018

Some history for those unfamiliar with Red Marley, and probably interesting too for those that are! Can be found with illustrations here: http://www.redmarleyhillclimb.com/History.html The Old Hill Motorcycle Hillclimbing started at Red Marley in the early twenties. The first track was known as the ...
by bbenxe
Mon Apr 02, 2018 8:55 pm
Forum: Int BSA Rally and other meetings
Topic: Unit Singles at Red Marley 2018
Replies: 7
Views: 3123

Re: Unit Singles at Red Marley 2018

I did not! I carried speed up a hill and strategically parked at the top to ensure an easy roll down to the gate to get back out...

Morning was damp for practice but brightened up nicely for the racing.