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Twins / A65 spitfire
« Last post by Davedix on 21 August, 2019, 19:32:49 »
Hi, newbie here.
Just bought a nice 1967 spitfire but concern about engine number as its on a raised pad which i
thought came in later. Matched frame and engine numbers only 3 numbers after a65sa .
Could it be replacement crankcases from blown engine ?  And would this effect its value drastically or not.
Cheers guys
Which BSA do you ride? / Re: A7 Longstroke
« Last post by Happyhenry on 21 August, 2019, 18:59:34 »
That's nice.   Did you get home once the mag cooled down ?

Called the AA - and guess what? They arrived about an hour and a half later and it started, despite me having tried it every 10 minutes up to that point. Chap had a folding trailer in the back of the van so he gave me a ride home rather than me risking doing it in several stages.

Now all running fine after a condensectomy and the fitting of a Brightspark condensor. Although I have since fitted a fully rebuilt spare magneto. Otherwise it's a very pleasant ride. The engine is, I think, on the standard 6:1 pistons and it pulls very well since I put it on solo gearing.

It looks better in the photo than in real life. It's an un-restored survivor having obviously been maintained on a budget (remould quality tyres when I got it) and having had a chair on it for decades. I like them like that - there are plenty of shiny bikes about.
Singles / Re: C10 3spd gearbox studs
« Last post by chaz on 21 August, 2019, 18:37:13 »
I will be looking for studs for the B40, some are not available but the longer by 1/2" are so will get them and re die the thread down and shorten the excess. quicker than waiting for a new batch to be made.
The Star and Garter / Speedo/tacho rubbers
« Last post by royblackburn1@btinternet. on 21 August, 2019, 17:32:44 »
Hi all, doe's anyone know if speedo/tacho rubber seals  from Draganfly advertised for without lip on bezel be ok for my 1966 A65L. thanks Roy
Singles / Re: C15 Kickstart cotter loosening
« Last post by Mike Farmer on 21 August, 2019, 16:42:52 »
 :) :)

Something that I did many years ago on a spinning pulley wheel. Old very heavy machine meant a very time consuming(and shekels) strip to effect proper cure.

Position it with your cotter pin the drill two holes opposite each inwards from the end at the join in the two items. Tap the holes to suit and put in grub screws. If your bits are shot anyway it is a no loss situation They will act as keys.

Mike 8) 8) 8)
Singles / Re: Pilot jet screw b40
« Last post by Hancock on 21 August, 2019, 14:32:35 »
Will do thanks
Twins / Re: A10 Noisy and running rough
« Last post by Marka10 on 21 August, 2019, 13:39:57 »
Thank you for you replies, I will be an expert by the time I sort this out.

I will set valve timing back one tooth (Splodges suggestion)   and set valve clearance.    0.015"

see if this gets me near to the Cam 357 (inlet valve opening) 51   68

If problem still exists I will check for Air leaks and contact Amal to check carb components specification


My problem is I do not know what work was carried out during engine overhaul, due to the chap been deceased. so they could be worn parts but everything that a can see seem in good condition Pinions bearing (plain) etc have no signs of wear.

I look at the Cam shaft with endoscope and shows no visual signs of wear and there is no lateral or radial movement on the Cam Pinion

the question is, is the inlet valve opening time, which seem more than the setting effecting the over fuelling.

The compression is good about the same as yours Julian




Singles / Re: C10 3spd gearbox studs
« Last post by Rick Rybicki on 21 August, 2019, 10:33:49 »
Thanks for your help. I hadn't seen the offer of "made to order" ss studs on the Draganfly site before. Cheers, Rick.
Twins / Re: A10 Noisy and running rough
« Last post by JulianS on 21 August, 2019, 09:21:17 »
I suggest setting the tappets at 0.015 inch and check the timing again.

That is the figure BSA give for checking Super Rocket valve timing in the 1962 Data book. Attached below.

Be aware that the whole of your valve train needs to be perfect condition to get near the factory quoted figures.

Wear on the rocker assembly, the followers, the cam, bearings and bushes and pinion backlash also cause variations. One degree of movement lost at the cam pinion means two degrees out at the crankshaft pinion.

But if it ran OK for the first 800 miles, unless the cam and followers have suffered significant wear in that that time I cannot see that you have a cam problem.

On the compression test - using a simple Gunson tester on my alloy head A10 with Gandini 8.75:1 pistons (actual ratio will be a bit higher as head skimmed due to a warp) and 356 cam - warm engine, throttle open and 4 kicks gives me 160psi.
Singles / Re: Pilot jet screw b40
« Last post by TTJOHN on 21 August, 2019, 09:04:50 »
Nothing to do with pilot jet, if as you say in third or top gear, this is where your main jet is in, pilot jet is only on tick over. Check for air leaks on carb intake first.

Regards TTJohn
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