Britbike forum

Classic British SparesKlempf British PartsBaxter CycleBritBike Sponsor SteadfastCyclesThe Bonneville ShopLowbrow CustomsGirling Classic MotorcycleLucas Classic MotorcycleHepolite PistonsIndustrial tec supplyJob Cycle

Upgrade to Premium membership HERE! Premium Membership


New Sponsor post
15% Off Black Friday Sale
by The Bonneville Shop - 11/24/22 5:51 pm
New FAQ post
Member Spotlight
Lannis
Lannis
Central Virginia
Posts: 14,691
Joined: July 2001
ShoutChat
Comment Guidelines: Do post respectful and insightful comments. Don't flame, hate, spam.
Top Posters(30 Days)
kevin 55
Top Likes Received (30 Days)
Bry 24
Newest Members
Hedgehog65, NDarwin, Bas classic bikes, lojo, Doug McLaren
12,333 Registered Users
Who's Online Now
6 members (Magnetoman, htown70, Shane in Oz, Richrd, Linden, Tridentman), 10 guests, and 29 robots.
Key: Admin, Global Mod, Mod
Forum Statistics
Forums35
Topics76,683
Posts782,996
Members12,333
Most Online204
Jul 10th, 2022
Previous Thread
Next Thread
Print Thread
Page 1 of 2 1 2
Joined: Mar 2022
Posts: 4
Likes: 1
Phonic Offline OP
Novice poster
OP Offline
Novice poster
Joined: Mar 2022
Posts: 4
Likes: 1
Completely new at this and it's my first restoration on an older bike so please bear with me.

I picked this up a couple of weeks ago from the original owner, the numbers are all matching but I can't tell whether it's a '67 or '68 or a hybrid?
It has the large vented drum on the front if that helps.

I've slowly been stripping it down to get it back to where she should be, it's going to be a slow process and I want to do it right.

Any info would be greatly appreciated!


[Linked Image from i.imgur.com]
[Linked Image from i.imgur.com]
[Linked Image from i.imgur.com]

BSA on eBay
Joined: Oct 2006
Posts: 4,905
Likes: 215
Britbike forum member
Offline
Britbike forum member
Joined: Oct 2006
Posts: 4,905
Likes: 215
By the engine and frame numbers it's a '67.

Joined: Apr 2005
Posts: 3,113
Likes: 150
Britbike forum member
Offline
Britbike forum member
Joined: Apr 2005
Posts: 3,113
Likes: 150
Are the carbs 32mm? See what number is on the head between the carbs 68-701 or the better '68 head. The brake looks '68.


mark
1 member likes this: Phonic
Joined: May 2013
Posts: 8,909
Likes: 288
Britbike forum member
Offline
Britbike forum member
Joined: May 2013
Posts: 8,909
Likes: 288
Id say its a very late 67, as it has all the 68 on goodies,

68 TLS as Mark pointed out,
68 on rear light unit

and probably the most relavent as its the only thing that can't have been altered in the last 55 years of its life, is the 68 on style gearbox oil filling hole, for the majority of 67 models this was where the cast "Halo" is on the main part of the crank case, and had an aluminium plug. For 68 on this was reloactated to the inner timing cover and used a plastic dipstick, much the same as what you have.

Its also a very high number, mine is 5000 numbers earlier than that (My 67 spitfire frame). supposed 20/Jan/67, it could also be one of the bikes that got updated and re-sent out in 69, possibly used up some of the left over 68 1 year only bits. Mine was apparently re-despatched in Nov/69


Now let’s all have a beer beerchug

68’ A65 Lightning “clubman”
71’ A65 823 Thunderbolt (now rebuilt)
67’ D10 sportsman (undergoing restoration)
68’ D14 trials (undergoing transformation)

1 member likes this: Phonic
Joined: Mar 2022
Posts: 4
Likes: 1
Phonic Offline OP
Novice poster
OP Offline
Novice poster
Joined: Mar 2022
Posts: 4
Likes: 1
Some fantastic info guys, thank you!

Numbers on the head are 68-887 if that means anything?
My mistake, they're the cylinder numbers, the head is 701.

Last edited by Phonic; 03/18/22 8:20 pm.
Joined: Mar 2022
Posts: 4
Likes: 1
Phonic Offline OP
Novice poster
OP Offline
Novice poster
Joined: Mar 2022
Posts: 4
Likes: 1
Carbs look to be 32mm?

Joined: Jan 2006
Posts: 3,141
Likes: 105
Britbike forum member
Offline
Britbike forum member
Joined: Jan 2006
Posts: 3,141
Likes: 105
It is a "Hybrid" '68. It has '68 model year features with '67 style numbers with the "Y" added to the engine. 478 "Hybrids" were produced in '68.

It's all discussed in the 'sticky' thread "Calling All Dash Y and Y..."


1967 BSA Wasp
1967 BSA Hornet (West Coast Model)
1967 BSA Hornet (East Coast Model)
1968 BSA Firebird Scrambler
1968 BSA Spitfire Mark IV
1965 BSA Cyclone Competition Build
1965 BSA Spitfire Hornet Build
Joined: May 2013
Posts: 8,909
Likes: 288
Britbike forum member
Offline
Britbike forum member
Joined: May 2013
Posts: 8,909
Likes: 288
Originally Posted by Phonic
Carbs look to be 32mm?


You must have good eyes, 900 series carbs were 28-32mm and aesthetically they are all identical apart from the series stamping and the change in choke size.


Now let’s all have a beer beerchug

68’ A65 Lightning “clubman”
71’ A65 823 Thunderbolt (now rebuilt)
67’ D10 sportsman (undergoing restoration)
68’ D14 trials (undergoing transformation)

Joined: Aug 2001
Posts: 6,042
Likes: 140
Britbike forum member
Offline
Britbike forum member
Joined: Aug 2001
Posts: 6,042
Likes: 140
I find it interesting that this one has the gearbox filler plug moved from the crankcase to the inner timing cover, but still has the straight-pull clutch release, whereby the clutch cable enters through the back side of the inner timing cover. I had always thought that the filler plug was moved at the same time they changed to the ball and ramp-type clutch release, but that's apparently not the case.

1967 twins had either Monobloc carbs or, for the Spitfire, GP carbs with remote float bowl. So the Concentric carbs, if original equipment, are another 1968 feature.


Mark Z

'65(lower)/'66(upper, wheels, front end, controls)/'67(seat, exhaust, fuel tank, headlamp)/'70(frame) A65 Bitsa.
2007 Triumph Bonneville Black
Joined: May 2013
Posts: 8,909
Likes: 288
Britbike forum member
Offline
Britbike forum member
Joined: May 2013
Posts: 8,909
Likes: 288
Originally Posted by Mark Z
I find it interesting that this one has the gearbox filler plug moved from the crankcase to the inner timing cover, but still has the straight-pull clutch release, whereby the clutch cable enters through the back side of the inner timing cover. I had always thought that the filler plug was moved at the same time they changed to the ball and ramp-type clutch release, but that's apparently not the case.

1967 twins had either Monobloc carbs or, for the Spitfire, GP carbs with remote float bowl. So the Concentric carbs, if original equipment, are another 1968 feature.

The dip stick was on the inner timing cover for 68 and 69, lots of changes made with inner timing covers including the webbing cast on to some to try and minimise engine noise for MIRA.

Most A65’s had monoblock carbs in 67, however for many bikes Concentrics were standard equipment (the humble bantam being one of them) I believe the 67 spitfire had Concentrics as standard and optional equipment of GP carbs ( GPs were expensive even back then) but I could have that the wrong way around. Not forgetting everything about this bike screams 1968 spec. Concentrics we’re standard equipment at that time anyway.

I think with the numbers given for the cylinder head, that was standard gor that year, for all twin carb models. With 30mm (1 5/32” carbs/ports) the later spitfire head with 32mm ports was 68 only, and the 68-701 head was for the early 1 5/32” carb models, I believe pre 3/8” rear head bolts.


Now let’s all have a beer beerchug

68’ A65 Lightning “clubman”
71’ A65 823 Thunderbolt (now rebuilt)
67’ D10 sportsman (undergoing restoration)
68’ D14 trials (undergoing transformation)

1 member likes this: Phonic
Joined: Mar 2022
Posts: 4
Likes: 1
Phonic Offline OP
Novice poster
OP Offline
Novice poster
Joined: Mar 2022
Posts: 4
Likes: 1
Originally Posted by Allan G
Originally Posted by Phonic
Carbs look to be 32mm?


You must have good eyes, 900 series carbs were 28-32mm and aesthetically they are all identical apart from the series stamping and the change in choke size.

Good eyes and a set of calipers smile

1 member likes this: Allan G
Joined: Oct 2001
Posts: 2,282
Likes: 401
Britbike forum member
Online Content
Britbike forum member
Joined: Oct 2001
Posts: 2,282
Likes: 401
Originally Posted by Gary E
It is a "Hybrid" '68. It has '68 model year features with '67 style numbers with the "Y" added to the engine. 478 "Hybrids" were produced in '68.

It's all discussed in the 'sticky' thread "Calling All Dash Y and Y..."
It's good to see one of those surface.
We've seen a lot of 1967 '-Y' machines (it seems most of the 1967 bikes had the modifications), and the 1970 'Y' bikes which started the whole saga, so confirmation that the 'Y' Spitfires are to Mk IV specification is helpful.

2 members like this: Gary E, Phonic
Joined: May 2013
Posts: 8,909
Likes: 288
Britbike forum member
Offline
Britbike forum member
Joined: May 2013
Posts: 8,909
Likes: 288
Originally Posted by Phonic
Originally Posted by Allan G
Originally Posted by Phonic
Carbs look to be 32mm?


You must have good eyes, 900 series carbs were 28-32mm and aesthetically they are all identical apart from the series stamping and the change in choke size.

Good eyes and a set of calipers smile


I missed the part where it showed you as the original poster laughing I thought you were just looking at the photos lol. Doh lol


Now let’s all have a beer beerchug

68’ A65 Lightning “clubman”
71’ A65 823 Thunderbolt (now rebuilt)
67’ D10 sportsman (undergoing restoration)
68’ D14 trials (undergoing transformation)

Joined: Feb 2007
Posts: 1,138
Likes: 107
Britbike forum member
Offline
Britbike forum member
Joined: Feb 2007
Posts: 1,138
Likes: 107
The GP carbs were in ‘66.

Ed from NJ

1 member likes this: Gary E
Joined: Mar 2012
Posts: 271
Likes: 8
Britbike forum member
Offline
Britbike forum member
Joined: Mar 2012
Posts: 271
Likes: 8
GP carbs were on the Spitfire in 1966 only.
Fullminator

Joined: Jan 2014
Posts: 2,333
Likes: 431
Britbike forum member
Offline
Britbike forum member
Joined: Jan 2014
Posts: 2,333
Likes: 431
And on any one of the 5000+ spitfires that were built outside the factory.

1 member likes this: Allan G
Joined: Apr 2013
Posts: 378
Likes: 14
Britbike forum member
Offline
Britbike forum member
Joined: Apr 2013
Posts: 378
Likes: 14
1967 WAS THE FIRST YEAR THAT THE SPITFIRES HAD Concentric CARBS BUT THE REST OF THE LINEUP STILL HAD MONOBLOCKS.


I APOLOGIZE FOR THE USE OF CAPS. I CAN ONLY TYPE WITH MY RIGHT HAND SO USING THE SHIFT KEY IS BEYOND MY CAPABILITES.

The Devil is in the details.

1957 BSA A10 Spitfire Scrambler (numbers matching, very correct, very nice condition)
1965 BSA A65 Lightning Rocket "Clubman" (restored)
1966 BSA A65 Spitfire MK-II (restored)
1967 BSA A65 West Coast Hornet (under restoration)
1975 Norton Commando Roadster (2100 miles)
2001 Kawasaki W650
1 member likes this: Allan G
Joined: Aug 2001
Posts: 6,042
Likes: 140
Britbike forum member
Offline
Britbike forum member
Joined: Aug 2001
Posts: 6,042
Likes: 140
Originally Posted by edunham
The GP carbs were in ‘66.
Ed from NJ
Originally Posted by Fullminator
GP carbs were on the Spitfire in 1966 only.
Fullminator
Originally Posted by Spitfire Ken
1967 WAS THE FIRST YEAR THAT THE SPITFIRES HAD CONCENTRIC CARBS BUT THE REST OF THE LINEUP STILL HAD MONOBLOCKS.

Well I don't know what to say, but I have the 1967 BSA Spares manual, original print, here in my lap, and it says that the '67 Spitfire had GP carbs, and all the other twins had Monoblocs. In fact there is not a picture or description of a Concentric carburetor anywhere in the book.


Mark Z

'65(lower)/'66(upper, wheels, front end, controls)/'67(seat, exhaust, fuel tank, headlamp)/'70(frame) A65 Bitsa.
2007 Triumph Bonneville Black
Joined: May 2013
Posts: 8,909
Likes: 288
Britbike forum member
Offline
Britbike forum member
Joined: May 2013
Posts: 8,909
Likes: 288
Quote
[/quote]
Originally Posted by Mark Z
[quote=edunham]The GP carbs were in ‘66.
Ed from NJ
Originally Posted by Fullminator
GP carbs were on the Spitfire in 1966 only.
Fullminator
Originally Posted by Spitfire Ken
1967 WAS THE FIRST YEAR THAT THE SPITFIRES HAD CONCENTRIC CARBS BUT THE REST OF THE LINEUP STILL HAD MONOBLOCKS.

Well I don't know what to say, but I have the 1967 BSA Spares Manual, original print, here in my lap, and it says that the '67 Spitfire had GP carbs, and all the other twins had Monoblocs. In fact there is not a picture or description of a Concentric carburetor anywhere in the book.

The spares book would have been issued before the first bike came
Off the production line. As mentioned above I was under the belief that GP carbs were offered as an optional extra and not standard equipment.

One of the posters from the day, all in 67 regalia with Concentrics fitted
ebay link to poster

Last edited by Allan G; 03/20/22 10:00 pm.

Now let’s all have a beer beerchug

68’ A65 Lightning “clubman”
71’ A65 823 Thunderbolt (now rebuilt)
67’ D10 sportsman (undergoing restoration)
68’ D14 trials (undergoing transformation)

Joined: Oct 2001
Posts: 2,282
Likes: 401
Britbike forum member
Online Content
Britbike forum member
Joined: Oct 2001
Posts: 2,282
Likes: 401
Originally Posted by Allan G
Originally Posted by Mark Z
I have the 1967 BSA Spares Manual, original print, here in my lap, and it says that the '67 Spitfire had GP carbs, and all the other twins had Monoblocs. In fact there is not a picture or description of a Concentric carburetor anywhere in the book.

The spares book would have been issued before the first bike came
Off the production line. As mentioned above I was under the belief that GP carbs were offered as an optional extra and not standard equipment.
There were a number of changes made to 1967 twins in general and the Spitfire in particular as a result of the 1966 models overheating, eventually traced to the 4CA points bouncing.
One of those changes was switching to Concentrics for the Spitfire, though that may have been cost saving as well.

1 member likes this: Allan G
Joined: Aug 2001
Posts: 6,042
Likes: 140
Britbike forum member
Offline
Britbike forum member
Joined: Aug 2001
Posts: 6,042
Likes: 140
Originally Posted by Shane in Oz
There were a number of changes made to 1967 twins in general and the Spitfire in particular as a result of the 1966 models overheating, eventually traced to the 4CA points bouncing.
One of those changes was switching to Concentrics for the Spitfire, though that may have been cost saving as well.

Ok, I won't believe everything I see in the Spares manual. I had gotten used to treating it as "Bible" because it reflected my 1967 Lightning in every detail.


Mark Z

'65(lower)/'66(upper, wheels, front end, controls)/'67(seat, exhaust, fuel tank, headlamp)/'70(frame) A65 Bitsa.
2007 Triumph Bonneville Black
Joined: Apr 2017
Posts: 135
Likes: 11
Britbike forum member
Offline
Britbike forum member
Joined: Apr 2017
Posts: 135
Likes: 11
There was also a transition from peony red to royal red in 67/8, perhaps that was the same with U.S. Spitfire models.


a
Joined: May 2013
Posts: 8,909
Likes: 288
Britbike forum member
Offline
Britbike forum member
Joined: May 2013
Posts: 8,909
Likes: 288
Originally Posted by semprini
There was also a transition from peony red to royal red in 67/8, perhaps that was the same with U.S. Spitfire models.

Thought it was Signal red for such models


Now let’s all have a beer beerchug

68’ A65 Lightning “clubman”
71’ A65 823 Thunderbolt (now rebuilt)
67’ D10 sportsman (undergoing restoration)
68’ D14 trials (undergoing transformation)

Joined: Apr 2017
Posts: 135
Likes: 11
Britbike forum member
Offline
Britbike forum member
Joined: Apr 2017
Posts: 135
Likes: 11
You could be right, I was going on Draganfly's paint codes, maybe it's the same colour with a different name?


a
Joined: May 2013
Posts: 8,909
Likes: 288
Britbike forum member
Offline
Britbike forum member
Joined: May 2013
Posts: 8,909
Likes: 288
Originally Posted by semprini
You could be right, I was going on Draganfly's paint codes, maybe it's the same colour with a different name?

I think royal red was the colour used on the royal star. Gary would know better than most I think, he has a 68 spitfire.

I was under the impression that the signal red was the red-(like a orange hue in the red) colour. But I’ve never spent any real time looking at this in detail for these colours. Trying to find a similar colour in metalic for Flamboyant candy red is as far as I have got with these years.


Now let’s all have a beer beerchug

68’ A65 Lightning “clubman”
71’ A65 823 Thunderbolt (now rebuilt)
67’ D10 sportsman (undergoing restoration)
68’ D14 trials (undergoing transformation)

Page 1 of 2 1 2

Moderated by  Allan G, Jon W. Whitley 

Link Copied to Clipboard
British Cycle SupplyMorries PlaceKlempf British PartsBSA Unit SinglesPodtronicVintage MagazineBritBike SponsorBritish Tools & FastenersBritBike Sponsor






© 1996-2022 britbike.com
Powered by UBB.threads™ PHP Forum Software 7.7.5