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Messages - BeenyBoy

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1
Singles / Re: B31 clutch & primary drive
« on: 16 February, 2018, 16:46:13 »
Thanks- Stripping and rebuilding it (again !!) and I think I've ascertained what the problem is- I think that the centre sleeve -and/or the shaft - have worn so that the when the centre nut is tightened the sleeve is hard up against the casing -or final drive sprocket- which is why the cork washer is crushed and it is difficult to rotate the clutch centre when tightened up - so....the answer is........ answers on a postcard ...to....this is going to be Expensive !!!!

2
Singles / Re: B31 clutch & primary drive
« on: 15 February, 2018, 17:40:10 »
Thanks LJ...  I'll give that a coat of looking at- I find that if the centre is tightened down there is about eighth inch forward and back free play on the chain wheel- but this largely disappears once the  springs and cover are fitted; Everything will rotate although all it feels very tight. I'll strip it down again tomorrow and have another look
cheers

3
Singles / B31 clutch & primary drive
« on: 13 February, 2018, 17:38:23 »
A little advise please-

I'm trying to rebuild the primary drive and clutch on my B31 (M m series gearbox + 6 spring clutch)

Inner chain case and sliding plate fitted -
-felt and cork washer behind the splined sleeve-
-2 row bearing and rear plate onto the sleeve

all as per service sheet and manual- but when I fit the clutch centre and tighten the mainshaft nut it tightens down but leaves the chain wheel loose and- for want a a better word "wobbly"- Further tightening of the nut results in the clutch centre becomes fixed and will not rotate

I cant see what I'm doing wrong- as the order of assembly is as per the worksheet and I cant really see how else it can fit together- what am I missing ?

any thoughts ?

 

4
Singles / Re: B31 Front m, guard stays
« on: 06 February, 2018, 18:57:01 »
On my Plunger model B31 they are all "inside"- essentially the front ones are all "upside" down U shape that fits into the profile of the guard and bolted through.
On the rear the bracket is tacked to the inside of the guard and the stays bolt to them



5
Singles / Re: Oil feed/return pipes
« on: 07 January, 2018, 10:26:02 »
Thanks for that Julian- it seems that the stainless pipes for sale simply specify either over or under gearbox routing with a generic B group listing but clearly as your explanation suggests they only actually apply to the swinging arm model

thanks

6
Singles / Oil feed/return pipes
« on: 07 January, 2018, 09:39:00 »
Hi guys
I would like to fit some shiny new armoured oil pipes to my B31 plunger; but all those offered for sale have a 90degree elbow union on one end; the fittings both into the crankcase and from the oil tank are obviously straight...  am I missing something ?

7
Singles / B31 front hub rebuild
« on: 22 December, 2017, 17:43:39 »
Hi Guys

I'm rebuilding the front hub on my 1955 B31 plunger after having the wheel rebuilt and after putting it together as per the service sheet it just doent "feel right"
I would have thought that the outer shell of near-side bearing should be flush with the lip inside the hub and therefore recessed into the hub by about 1/4"; but when put together the edge of the bearing is just about flush with the edge of the hub- see pic. The bearing is correctly positioned on the spindle- ie flush with the retaining lip and the bearing on the other side appears to be in the correct place.  Its so long ago that I stripped it down I cant remember what the original looked like;
There are 2 washers- a thick one with a cut-out (why I dont know) and a shim- I'm assuming the thick one goes on the inside of the off-side bearing and the shim on the ouside of the near-side bearing- the diagram on the service sheet isnt very clear, but in any case the dust cover wont fit

Anybody throw any light on this ?   

8
Bantam / Re: Bantam D7 - Oil and Petrol
« on: 20 November, 2017, 11:34:59 »
According to my handbook for the D14; " Use self mixing 2 stroke oil (eg Castrol 2 stroke) at 24:1; or you can use non self mixing (eg SAE 40) at a ration of 32:1"
Do you suppose that the higher compression D14 needs a different mix ? I would have thought that as the engine is essentially the same the same mix would apply to all...but of course I could be wrong.

 :)

9
Singles / Re: gear selector problem
« on: 15 November, 2017, 17:31:53 »
Ok thanks guys,,, now sorted. I'm not sure what I've done differently but put it together for the "n"th time and it seems to work, I suspect I hadnt seated the unit properly in the casing...but anyoo...thanks for your help

cheers

Mike :)

10
Singles / Re: gear selector problem
« on: 14 November, 2017, 17:30:33 »
Hi

Operating the gear change lever allows the pawl to engage on one side with the ratchet but it wont move either up or down a "slot"  there doesnt appear to be enough free movement

11
Singles / Re: gear selector problem
« on: 14 November, 2017, 13:24:03 »
Hi

Thanks but I've seen that and as far as I'm aware I've put it together as per the instructions.. but once place in the box the pawls are nowhere near the ratchet...so where am I going wrong ?

 

12
Singles / Re: gear selector problem
« on: 13 November, 2017, 17:45:35 »
come on guys...I'm struggling here !

13
Singles / Re: gear selector problem
« on: 08 November, 2017, 16:06:42 »
pix

14
Singles / Re: gear selector problem
« on: 08 November, 2017, 16:04:50 »
Do these make it clearer ?

15
Singles / Re: gear selector problem
« on: 06 November, 2017, 17:31:41 »
sorry....continued... so when the selector is in position the pawls are not in the ratchet slots

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