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Messages - STAR TWIN

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Twins / Re: spark plugs
« on: 18 February, 2017, 14:58:46 »
Something odd going on if plugs are actually burning out. Are the electrodes melting? My '51 Star Twin has run happily for many years on NGK B7HS plugs and bog standard carb settings.
You do have to be careful to avoid counterfeit plugs - if they are too cheap to be true, they are indeed too cheap to be true.
What colour are your plugs? White means running too weak.

Twins / Re: Oil Level
« on: 18 February, 2017, 06:37:28 »
I keep adding oil until when I kick it over I get oil on my finger from the top run of the primary chain. Make sure you press the kill button when kicking it over. Safety first kids!

Twins / Re: Lubricants
« on: 16 February, 2017, 07:59:58 »
B31 is on Castrol XXL (straight 40) 'cos I 've got gallons of the stuff. The A7 is also currently on XXL but is usually on Morris's 20-50. The A10 is on Morris's 20-50.
Really it's a question of good quality monograde oil or good quality multigrade. My general rule of thumb is monograde for roller bearing big ends, multigrade for plain big ends.
There is massive discussion elsewhere on the levels of ZDDP additive in classic oils against the reduced levels in current oils which have to avoid contaminating exhaust catalysts.
The bottom line is that any reputable oil changed reasonably regularly will do the job. 

The Star and Garter / Re: New BSA Website
« on: 13 February, 2017, 06:32:18 »
Very interesting site! I have an ex-Army B40 currently in the queue following a badly botched repair by my son... Slightly mixed feelings about ex-RAFP machines, having been in the RAF myself and had the odd run-in with the snowdrops.

Twins / Re: Steering Stem Nut
« on: 11 February, 2017, 09:27:41 »
You might get the odd friction disc ending up on the floor. Just take a look at how it all goes together before the fateful unwind.

Twins / Re: A10 rocker cover
« on: 10 February, 2017, 17:30:37 »
No. I have tried and failed more times than I can remember to fit the rocker box using the pushrod locating tool. Perhaps it's just me, but I invariable end up using screwdrivers or bits of bent wire to get the pushrods where they are supposed to be.

Singles / Re: Wiring loom / harness
« on: 10 February, 2017, 06:32:32 »
Try Al Osborne. He'll make up the correct loom.

Twins / Re: A65L engine rebuild
« on: 07 February, 2017, 14:16:45 »
Not everyone has had a great experience with timing side needle roller conversions. The original plain bush gets slagged but it's not at all bad. Yes, if it wears badly it will reduce oil flow to the big ends - but by that time the big ends will be due attention anyway. The plain bush A7 and A10 in the family have been absolutely fine despite some frankly brutal treatment over countless thousands of miles over the last 40+ years. Just make sure any replacement bush is properly line reamed. Good enough for me.   

Which BSA do you ride? / Re: A7 Star Twin
« on: 06 February, 2017, 17:05:55 »
The one of me in my youthful days was taken in Little Glen Shee, out for a trail ride. My wife was accompanying me on her A10. The recent grey haired old man one was taken at home in one of our fields near Biggar.
Here's another one of it at the Pass of the Cattle - Bealach na Ba. 

Twins / Re: Bsa A10 ariel hubs
« on: 06 February, 2017, 17:00:42 »
Must have been a few of us at the Haggis Bash. The Ariel hub brakes are reckoned to be no better than the BSA 8" full width ones. Not very good then. The advantage of the BSA full width one is that you can fit a TLS brake plate as I have done. There are a couple of things to watch for - see the relevant thread.   

Which BSA do you ride? / A7 Star Twin
« on: 04 February, 2017, 17:26:13 »
The all-rounder. 40 years of tremendous fun so far. Trail riding, touring, long distance commuting, long distance trials. As all-rounders go, it takes some beating. 

Twins / Re: BSA A10 twin leading shoe brake
« on: 04 February, 2017, 17:24:07 »
It is all too easy to set up a TLS brake badly. Of course, all the usual brake rules apply. Choice of linings being paramount. Most aftermarket linings are far too hard. Something a bit softer like AM2 or MZ41 (if you can get them) are far better for normal use.
The thing to watch with TLS brakes is stopping on a steep slope. You can find yourself setting off backwards despite hauling on the brake as hard as you can.   

Twins / Re: BSA A10 twin leading shoe brake
« on: 03 February, 2017, 13:32:39 »
The 8" SLS on my Star Twin is excellent, as is the 8" SLS brake on my Dominator. However, the 8" SLS full width hub brake on the A10 is almost as useless as the 7" SLS full width hub brake on my B31. The original anti-lock system... So the A10 now sports a TLS brake and actually stops.   

Singles / Re: B40 WD gear ratio
« on: 31 January, 2017, 06:47:58 »
Thanks Julian. Of course you need to replace the primary chain when you fit the 28T engine sprocket. It's the best modification you can make to a B40. And you can still ride long distance trials!

Which BSA do you ride? / Re: Stargazer
« on: 30 January, 2017, 17:33:19 »
And my B31 is called......B31! Seen here on Haggs Mine at the Beamish Trophy Trial and out on a run.

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