Search found 18 matches

by kgubert
Sun May 24, 2020 5:11 pm
Forum: Tech
Topic: B25T Gearbox Clicking – What Sound is This?
Replies: 13
Views: 375
Flag: United States of America

Re: B25T Gearbox Clicking – What Sound is This?

First, big thanks to minetymenace and Mr Mike! The gearbox came apart exactly as they said it would. Quite easy, actually. It looked like the exhaust wasn't going to interfere, but as the inner cover began to slide off it was apparent it was going to be in the way of the clutch cable boss. The one m...
by kgubert
Thu May 21, 2020 9:49 pm
Forum: Tech
Topic: B25T Gearbox Clicking – What Sound is This?
Replies: 13
Views: 375
Flag: United States of America

Re: B25T Gearbox Clicking – What Sound is This?

We've got the oils drained (gearbox and engine) and Dad removed the outer timing cover the other day. He made the first discovery: The mainshaft nut (and lockwasher and kickstart spring) were sitting in the bottom of the outer timing cover. The treads on the nut are pretty nasty so we'll be getting ...
by kgubert
Tue May 19, 2020 3:23 am
Forum: Tech
Topic: B25T Gearbox Clicking – What Sound is This?
Replies: 13
Views: 375
Flag: United States of America

Re: B25T Gearbox Clicking – What Sound is This?

If you need parts or help, Ed Valiket is only 2-1/2 hours from you in Howard City. See link at top of the page. Tom Yes, we are quite familiar with Mr. Ed V! We've had him so some smaller stuff for us and we've bought many parts from him. I've been to his shop once. He's a great guy and has been a ...
by kgubert
Mon May 18, 2020 8:47 pm
Forum: Tech
Topic: B25T Gearbox Clicking – What Sound is This?
Replies: 13
Views: 375
Flag: United States of America

Re: B25T Gearbox Clicking – What Sound is This?

Thank you both very much! I was going to ask about lifting the thing up on a stand instead of laying it on its side, but it sounds like that'll work fine. I'd rather put this off and work on some of my other junk, but my Dad is really chomping at the bit so I'm sure I'll get roped into it very soon....
by kgubert
Mon May 18, 2020 3:01 pm
Forum: Tech
Topic: B25T Gearbox Clicking – What Sound is This?
Replies: 13
Views: 375
Flag: United States of America

Re: B25T Gearbox Clicking – What Sound is This?

Layshaft pinion gear (the one that's always engaged with the sleeve gear) is the gear that wears the most. Ratio is 22/14, or 1.57. Sounds pretty close to 1.6. Tom Wow, that does sound HIGHLY suspect. I've attached an annotated screenshot to demonstrate what's being discussed. Screen Shot 05-18-20 ...
by kgubert
Mon May 18, 2020 3:53 am
Forum: Tech
Topic: B25T Gearbox Clicking – What Sound is This?
Replies: 13
Views: 375
Flag: United States of America

Re: B25T Gearbox Clicking – What Sound is This?

Alright, since it's difficult to actually see how many turns the countershaft sprocket turns, here's what I did: Turned the rear wheel five times. Heard 31 clicks. The bike uses 14/54 tooth sprockets, so for every one rear sprocket turn the countershaft sprocket turns 3.857 times. Therefore, the cou...
by kgubert
Sun May 17, 2020 5:08 pm
Forum: Tech
Topic: B25T Gearbox Clicking – What Sound is This?
Replies: 13
Views: 375
Flag: United States of America

B25T Gearbox Clicking – What Sound is This?

If a picture is worth one thousand words, what is a video worth then? BSA B25T Gearbox Clicking Of course I'm not talking about the sound of the chain, I mean the much lower frequency click/clunk. The video was taken with the bike on a stand. It makes the sound spinning the wheel forward or backward...
by kgubert
Wed Sep 04, 2019 6:31 pm
Forum: Tech
Topic: B25T Rear Chain Oiler – Cap Off?
Replies: 17
Views: 3300
Flag: United States of America

Re: B25T Rear Chain Oiler – Cap Off?

Alright guys, I wanted to give an update. Thanks for the note about making sure the blanking bolt doesn't protrude into the gasket/cover. As can be seen here, the 5/8 in. screw is absolutely perfect. IMG_5529.jpg From the other side, I think a button head allen screw fits like a glove for this appli...
by kgubert
Fri Aug 30, 2019 3:50 pm
Forum: Tech
Topic: B25T Rear Chain Oiler – Cap Off?
Replies: 17
Views: 3300
Flag: United States of America

Re: B25T Rear Chain Oiler – Cap Off?

I seem to recall that the brand T covers had the hole and a piece of gauze behind held in with a perforated spring disc sort of thing... I was searching around and I found this picture from bsaunitsingles. It sounds like that's what you're referencing. 70-9800.JPG Rather than using up NOS parts, dr...
by kgubert
Thu Aug 29, 2019 12:37 am
Forum: Tech
Topic: B25T Rear Chain Oiler – Cap Off?
Replies: 17
Views: 3300
Flag: United States of America

Re: B25T Rear Chain Oiler – Cap Off?

You guys really are great. Thank you so much! Yes, I took a closer look at the parts book today and I see they actually list a part number for the chain oiler blanking bolt and the fiber washer (I've attached a snapshot of this). Yep, it does look like a 1/4-20 x 5/8 in. bolt and a 1/4 in. fiber was...
by kgubert
Wed Aug 28, 2019 3:45 am
Forum: Tech
Topic: B25T Rear Chain Oiler – Cap Off?
Replies: 17
Views: 3300
Flag: United States of America

B25T Rear Chain Oiler – Cap Off?

We've got the project '71 B25T is decent running condition. After the first ride around the field we discovered primary chain oil leaking out of where the rear chain oiler assembly was supposed to be. Of course, the assembly is missing, leaving only the hole. It'll just be a trail bike for us and it...
by kgubert
Mon Oct 08, 2018 6:02 pm
Forum: Project bikes
Topic: Finally bought one: 1971 B25T
Replies: 15
Views: 4549
Flag: United States of America

Re: Finally bought one: 1971 B25T

Thank you both for all the information! Yes, learning the technicalities of these things is a lot to learn, but we are having fun learning everything. I have been scrolling through the Tech pages. Yes, a lot of good information there. That little filter housing really looks clean! Even better if it ...
by kgubert
Wed Oct 03, 2018 2:53 am
Forum: Project bikes
Topic: Finally bought one: 1971 B25T
Replies: 15
Views: 4549
Flag: United States of America

Re: Finally bought one: 1971 B25T

Time for an update, I think. And of course, more questions. The engine is at a shop in London, ON, Canada right now getting machine work done and assembly. My Dad and I went back and fourth about having them do the assembly or just the machine work and us do the assembly. Unfortunately being very sh...
by kgubert
Wed Sep 12, 2018 3:38 am
Forum: Project bikes
Topic: Finally bought one: 1971 B25T
Replies: 15
Views: 4549
Flag: United States of America

Re: Finally bought one: 1971 B25T

Couple of pages that might be of interest: Ratio Page B25 Speed Calculator You should be able to get a 17T gearbox sprocket on there without trouble Thanks, that's a handy table. So, according to that table, the gearbox will accept down to an 11T sprocket? If so, I should be fine with a 12T or 13T ...
by kgubert
Mon Sep 10, 2018 6:02 pm
Forum: Project bikes
Topic: Finally bought one: 1971 B25T
Replies: 15
Views: 4549
Flag: United States of America

Re: Finally bought one: 1971 B25T

Since it's been a while, it's definitely time for an update. We had the engine torn mostly down, save for primary drive and splitting the cases (didn't have the special tool for unbolting the clutch springs). As soon as we removed the rocker box inspection caps I knew we were in for a long haul. The...
by kgubert
Tue Aug 14, 2018 9:46 pm
Forum: Project bikes
Topic: Finally bought one: 1971 B25T
Replies: 15
Views: 4549
Flag: United States of America

Re: Finally bought one: 1971 B25T

Thankfully, they are 18 in. rear and 21 in. front.
by kgubert
Sun Aug 12, 2018 8:34 pm
Forum: Project bikes
Topic: Finally bought one: 1971 B25T
Replies: 15
Views: 4549
Flag: United States of America

Finally bought one: 1971 B25T

As indicated in the title, my Dad and I finally found one that's pretty much perfect for what he's looking for (project, a couple mild trail rides a year). It's originally a 1971 B25T, actually matching numbers. Definitely Betor forks, and possibly Betor shocks as well. I can't positively ID them, b...
by kgubert
Sun Jun 10, 2018 5:56 pm
Forum: Parts for sale
Topic: 1973 BSA B50mx for sale
Replies: 1
Views: 3343
Flag: United States of America

Re: 1973 BSA B50mx for sale

I know the chances of this still being available are much less than slim and none... But you don't know until you ask!
My Dad and I are shopping for a bike exactly like this.