BSA Owners' Club Workshop Discussions

The BSA Workshop => Twins => Topic started by: Alan Dornan on 01 May, 2021, 15:25

Title: 1956 Road Rocket Restoration
Post by: Alan Dornan on 01 May, 2021, 15:25
Hello, I have restored, to the best of my ability, a basket case Beeza. Starting with the crank, everything has been sorted, even the Mag & Dyno rewound. I have used many SRM parts, and also their timing disc. The bike has the auto advance/retard mechanism. I have fitted a brand new Amal 389, with all the recommended specs, as the books, and Amal recommend. I put my foot through the kick-start and it fired first time. Problem is, even with the throttle stop screw virtually removed, the engine is 'racing', revving far too fast. I have double checked for air leaks, and also dropped the needle to its lowest groove. Can anybody help me please? I am at a bit of a loss.
Title: Re: 1956 Road Rocket Restoration
Post by: JulianS on 01 May, 2021, 16:25
Check the throttle cable is allowing the slide to drop right down on the stop. You should be able to hear the slide touch the stop when throttle released. Make sure the cable is properly seated in the carb top, in any mid cable adjuster and in the twist grip.
Title: Re: 1956 Road Rocket Restoration
Post by: Alan Dornan on 01 May, 2021, 18:02
Hello Julian,

Thanks for the reply, I think it may be more in depth than that to be honest. I can actually disconnect the throttle cable at the handlebar end. The bike will still start. If you pull the throttle cable inner, you get that metallic 'clink' when the spring returns the slide to the bottom of its travel inside the carb.

This carburettor is built to the original specification and comes supplied with:

3.5 Cutaway Slide

290 Main Jet  

106 Needle jet

30 Pilot Jet

The bike starts perfectly on each kick, which suggests the time is spot on. I am thinking there is too much fuel on tickover.  That is my logical thinking, but I could be wrong.

Thanks

Title: Re: 1956 Road Rocket Restoration
Post by: geraldhattrick75 on 01 May, 2021, 22:07
For what it's worth Alan, I wouldn't think it's just too much fuel, it's too much fuel and air- which kinda suggests that either the slide isn't sitting right down or possibly the cutaway is too great (although I wouldn't think that second suggestion holds much validity as the trailing edge of the slide is fairly flat)

Is the jet block sitting correctly? The throttle stop screw fully out? Pilot screw about 1 1/2 turns out (from fully screwed in)? No air leak between the carb and intake manifold (which would allow air in)?

Whatever it is made, hope you get it sorted soon.
Dave.

By the way, lovely looking bike there.
Title: Re: 1956 Road Rocket Restoration
Post by: MJM_58SR on 02 May, 2021, 08:43
Hi Alan
Could I ask where you had the tank done, or where you bought it from please?
Lovely looking bike
Martyn
Title: Re: 1956 Road Rocket Restoration
Post by: Alan Dornan on 03 May, 2021, 19:29
Thank you for the compliments, the bike is coming together nicely, a lot of work has gone into it, but worth it. It was kind of destined to never see the road again.

The tank was sprayed by Alan @ Spray Bay, Immingham, near Grimsby/Hull. I also know of excellent people in Manchester & Shropshire.
Title: Re: 1956 Road Rocket Restoration
Post by: MJM_58SR on 03 May, 2021, 21:58
Thanks Alan
I am looking to get my tank restored and considering options at the minute. I have used quality chrome at Hull in the past and I think I'll get the tank redone there too so may be worth speaking to your painter too.
Thanks
Martyn
Title: Re: 1956 Road Rocket Restoration
Post by: Alan Dornan on 04 May, 2021, 12:59
Hello Martyn, I forgot to say, Alan also customised my Kawasaki W800 tank. He is excellent.
Title: Re: 1956 Road Rocket Restoration
Post by: MJM_58SR on 04 May, 2021, 18:27
Hi Alan
Is that the candy lime green? I've got a KH that I just need to get the paint done.
Martyn
Title: Re: 1956 Road Rocket Restoration
Post by: Alan Dornan on 04 May, 2021, 18:51
Hello Martyn,

Yes it is, that is the colour. Alan has sprayed a few of these tanks to date. The idea is to create a 'Scrambler' out of either the W650 or W800.

Thanks
Title: Re: 1956 Road Rocket Restoration
Post by: geraldhattrick75 on 04 May, 2021, 19:16
Wow Alan, that is absolutely superb work (both bikes).

I'm planning to spray my own A65 Lightning (Clubman-ish) tank soon, but I doubt I'll come remotely close to that standard.....



Stunning.....

Title: Re: 1956 Road Rocket Restoration
Post by: Alan Dornan on 04 May, 2021, 19:42
Thank you, and to be fair, the Kawasaki is more BSA related than many people realise !!
Title: Re: 1956 Road Rocket Restoration
Post by: MJM_58SR on 04 May, 2021, 20:50
That's really nice, I know where to go now!