The BSA A7-A10 Forum

Bikes, Pictures, Stories & more => Chat, Offtopic, Meetings & Everything Else => Topic started by: edboy on 18.11. 2018 23:33

Title: A10 and motorways
Post by: edboy on 18.11. 2018 23:33
hi all. i m trying to find the right cruising speed on the motorways. 65mph feels safe but rougth in the pot holed inside lane. the motor smooths out a little at 70 plus. thinking of cruising at 75-80 and hogging the middle. anyone else touring  on their a10?
how about you racers? can you cruise at max revs for long?
its a small journal with the bush fitted.
Title: Re: A10 and motorways
Post by: Billybream on 19.11. 2018 04:44
Not for mine, would not be so cruel at her age, we would find the alternative routes and enjoy our time together.
Title: Re: A10 and motorways
Post by: Black Sheep on 19.11. 2018 06:55
Cruising at 75-80 mph (not strictly legal!) was OK back in the days of my youth in the 1970s when replacement engines were available and cheap. I was once sitting behind a small journal A10 on the motorway at 80+ and witnessed the engine explode in a most spectacular fashion. Nothing left but the cylinder head. Where did the rest go?
I have been using the '59 A10 for motorway work in the last couple of weeks. 65 mph seems just fine, sometimes 70 occasionally 75 for an overtake.
Funny old thing the A10. It just does whatever you ask of it. It's just as happy pottering along back lanes at 30 mph.
Title: Re: A10 and motorways
Post by: Sav on 19.11. 2018 09:04
I don't use motorways unless absolutely necessary, not what they were made for.

If I do the it's 55-60 for me and sit in the middle of the left hand lane, make sure I do not get squashed to the side, especially on these stoopid new 'smart' motorways where there is no hard shoulder, most bloody dangerous things going for stranded motorcyclists.
Title: Re: A10 and motorways
Post by: Swarfcut on 19.11. 2018 10:01
  Motorways and the ol' Plungy are not for me. Learnt my lesson twice. Major Engine failure on the MI at Newport Pagnell featured in my introductory post.  Then when back on the road, riding up the M5 from Barnt Green to West Bromwich, at night, in the rain, no leg shields, like being in a washing machine and getting splashed by the trucks.

   The motor kept going, but as I approached Junction 1 to come off, realised water had got into the throttle cable and the throttle was jammed.  Managed to use the cut out on the handlebars to make erratic and scary progress to a place of safety.

  If you choose to regularly use the motorway, a 20 tooth gearbox sprocket would be a good choice for a more relaxed, less frantic cruise speed.

 As for cruising at maximum revs, I suppose it will be fine until something major drops off or it goes BANG in a big way. I value my wedding tackle and don't fancy a 60 year old alloy rod making a guest appearance, so it's a light throttle and mechanical sympathy from me.

  Swarfy.
Title: Re: A10 and motorways
Post by: cyclobutch on 19.11. 2018 11:10
Well some times there seems little choice but to head for the motorway.

My main criteria is to at least be fast enough that the trucks don't feel the need to be overtaking, that doesn't seem fair on anyone. So c. 55 per has to be a minimum cruise speed. On my A10 60/65 seems just dandy. At that speed she does still feel like I'm holding her back, but I'm just not prepared to push any harder these days.
Title: Re: A10 and motorways
Post by: JulianS on 19.11. 2018 12:12
Mine is happy to keep a 70 cruising speed plus more for overtakes. About 4000 rpm.
Title: Re: A10 and motorways
Post by: RDfella on 19.11. 2018 13:12
Julian - are you running standard balance factor? Didn't feel the need to check mine when I rebuilt the bike, as apart from a 7 cam it's all standard. But vibration starts after 50. It's not bad, but wouldn't want to stay there for long. It's as sweet as a nut below that and things may improve when it's fully run in. Have pushed her as far as I dare on a motor with alloy rods (old ones with years of fatigue built in) but vibes don't go away at those revs. Maybe at 6,000 or more, but I don't want to collect my engine in a shovel. I regret now not doing the modification I do to new engines and some racing ones, whereby balance can be altered without an engine strip.
Title: Re: A10 and motorways
Post by: JulianS on 19.11. 2018 14:55
Dynamic balanced by SRM 9 years ago, dont remeber what factor was used, interestingly a number of the extra drillings which were required were to one side of the centre.
Title: Re: A10 and motorways
Post by: RoyC on 19.11. 2018 15:37
I remember in the 1960s, going to Earls Court for the motorbike show on my 1961 Shooting star with my mate on his Bonneville. We went down to the newly built M1 and both went flat out all the way from Midlands to London, and back again.  *eek*
Neither bike missed a beat.
I don't know what flat out related to, speedwise.
Title: Re: A10 and motorways
Post by: A10 JWO on 19.11. 2018 15:44
I don't feel confident enough to brave the motorway anymore, don't mind admitting it either. Lost my bottle. Green lanes for me at my age.  :!
Title: Re: A10 and motorways
Post by: Steve.Carter on 19.11. 2018 17:55
Firstly I must apologise for not posting here much but I can help with this thread.
I've used my Huntmaster as my main transport in connection with my business for the last 10 years or so.  Doing around 20 thousand miles per year. I'd say around 80% of those miles are on motorways. 60-65mph gets me safely past the trucks with a bit in hand if I cock up.  I've never ridden an A10 but can't imagine they are that much different to my Ariel. 
I'm now getting a bit frightened writing this *smiley4* but my Huntmaster has been very reliable, more so then my last modern bike. Riding up to London on the M3 from Eastleigh Hampshire where I live for example  only takes an extra 5-10minutes and if the traffic is bad then it màkes no difference at all.

 Actually the motorways nowadays are getting easier for old bikes, they are slowing down! The so called "Smart Motorways" are even slower. No one even wants to drive in the extra lane leaving it empty for me. Millions spent for my Ariel *smile*

Steve
Title: Re: A10 and motorways
Post by: RayC10 on 19.11. 2018 18:50
Motorways? not much of a worry in Norfolk  :(
Title: Re: A10 and motorways
Post by: Steve.Carter on 19.11. 2018 19:21
Motorways? not much of a worry in Norfolk  :(
Can't be many counties without motorways. But they do get me to the nice roads quicker. 200 miles on the motorway makes the twisties even more enjoyable.
Title: Re: A10 and motorways
Post by: Greybeard on 19.11. 2018 19:53
65mph is good for me, although I have pushed up to 70. I don't want to break my engine.

If I find myself on a motorway/freeway/dual carriageway type of road I try to find a truck that's going about 60mph, (100kph) and I tuck in and follow it. This means that prats do not constantly want to overtake me.

On long trips I normally set my SatNav to 'Shortest', which means I'm pootling along country lanes most of the time.
Title: Re: A10 and motorways
Post by: KiwiGF on 19.11. 2018 20:05
hi all. i m trying to find the right cruising speed on the motorways. 65mph feels safe but rougth in the pot holed inside lane. the motor smooths out a little at 70 plus. thinking of cruising at 75-80 and hogging the middle. anyone else touring  on their a10?
how about you racers? can you cruise at max revs for long?
its a small journal with the bush fitted.

What’s a motorway?  *whistle* *woo*
Title: Re: A10 and motorways
Post by: bsa-bill on 19.11. 2018 21:15
Quote
What’s a motorway?

3 lane (each side) highway
Title: Re: A10 and motorways
Post by: Black Sheep on 19.11. 2018 21:21
Except for viewers in Scotland - 2 lanes each side.
Title: Re: A10 and motorways
Post by: bsa-bill on 19.11. 2018 21:31
Quote
Except for viewers in Scotland - 2 lanes each side.

Ah yes BS, I should have thought a bit harder Northumberland has similar

BTW I reported a pothole last week, it and several others have now got an orange outline, also piles of white salt have appeared at various banks and hills, must be an election or something in the offing (please don't take that as a political comment, just an observation gained over 75 years)
Title: Re: A10 and motorways
Post by: cyclobutch on 20.11. 2018 15:50
Motorways? not much of a worry in Norfolk  :(

Norfolk is always a favourite ride out for me on older stuff from the Essex badlands. Easy access on a more countrified route.