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by Brian_Walker
Tue Mar 31, 2020 1:58 am
Forum: Main Chat Forum
Topic: 5 tpi Plastic Thread
Replies: 14
Views: 582

Re: 5 tpi Plastic Thread

I have a crank handle that is held in the spindle bore by a small tapered mandrel at the chuck end. This is great to control slow thread cutting, I made it up for making up a backing plate for my 4 jaw chuck.
by Brian_Walker
Wed Mar 25, 2020 1:39 am
Forum: Main Chat Forum
Topic: Burman BA Mainshaft Endfloat
Replies: 5
Views: 262

Re: Burman BA Mainshaft Endfloat

Thanks Alan, will check alignment with rear spocket, I thought the spacer on the sprocket end may have been homemade but from your comments may be a correct one. It could be the bearing is not the correct one (a little narrower) hence the extra clearance, I ran the bike in the 70s without knowing th...
by Brian_Walker
Tue Mar 24, 2020 7:09 am
Forum: Main Chat Forum
Topic: Burman BA Mainshaft Endfloat
Replies: 5
Views: 262

Burman BA Mainshaft Endfloat

I seem to have excessive mainshaft endfloat in my BA gearbox (G48D48) 1948 VH box. I have a sprocket end spacer that looks like a CP one but is much shorter, Drags show the BA type to have notches cut on each side while the CP is straight cut like mine. I have a CP box from the same year off a NH bu...
by Brian_Walker
Sat Mar 21, 2020 11:03 pm
Forum: Four stroke
Topic: Monobloc Float levels
Replies: 3
Views: 142

Re: Monobloc Float levels

Have seen that note with the tube but had no suitable bits that didn't leak when fiddling around probably needed silicone or tygon, I would definitely use the tube if the carb was still on the bike.
Brian
by Brian_Walker
Sat Mar 21, 2020 10:00 am
Forum: Four stroke
Topic: Monobloc Float levels
Replies: 3
Views: 142

Monobloc Float levels

Finally found a use for the perspex chuck guard that came with my mini lathe. Had to add a blob of solder to the brass bracket on top of the float where it touches the needle to get it right. (its a plastic needle now so it shouldn't wear down the solder.) Some of the old floats have a small indenta...
by Brian_Walker
Fri Jan 24, 2020 10:32 am
Forum: Four stroke
Topic: 389 Monobloc Leaking
Replies: 7
Views: 301

Re: 389 Monobloc Leaking

Thanks guys, I will persevere with the monobloc for now, I had one on my Matchless I rode to work every day for years without any problems.
I will still refit my GP when the engine is run in and I get a shorter velocity stack and move the oil tank a little to provide more clearance.
by Brian_Walker
Wed Jan 22, 2020 11:12 pm
Forum: Four stroke
Topic: 389 Monobloc Leaking
Replies: 7
Views: 301

Re: 389 Monobloc Leaking

No unfortunately, it seem that with the float at its highest point the valve is only half closed, only 0.040" was removed from the cover and also the 389 has a small spacer between the float and the cover to prevent this.
Cheers Brian
by Brian_Walker
Wed Jan 22, 2020 12:09 pm
Forum: Four stroke
Topic: 389 Monobloc Leaking
Replies: 7
Views: 301

389 Monobloc Leaking

Hi, After finding my GP carb will no longer fit my VCH without getting rid of the Velocity stack I picked up a cheap 389/1 from ebay jetted for AJS single. As the cover was a dodgy I set it up on a bit of timber bolted to my lathe faceplate with 3 cheesehead screws located to grip the cover holes an...
by Brian_Walker
Sat Jan 11, 2020 11:54 pm
Forum: Member's Bikes
Topic: Murphy's law prevails
Replies: 5
Views: 342

Re: Murphy's law prevails

Thanks, I did notice that mine may have been shipped with a twin tank the picture below show plenty of space for a velocity stack when the filler is at the rear.

fh.jpg
by Brian_Walker
Sat Jan 11, 2020 9:12 am
Forum: Member's Bikes
Topic: Murphy's law prevails
Replies: 5
Views: 342

Murphy's law prevails

Over the last week I started to really get into putting things together on the VCH, because I am trying to make a road bike I keep running into issues with my previous build of some 40 years ago. First I have fitted a 9:1 piston instead of the 14:1 and have removed the 3mm spacer under the barrel. (...

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