Sloper S30-13 performance issues

[Y13 Alan G]

I only have spare one inch jet blocks. I have a 1929 557cc SV sloper and the jet block is one inch. I'm attaching photos of a spare jet block and it is difficult to see how the inlet could be increased by 1/16th of an inch without having a larger bodied carburettor which I don't know if it exists. My SV Sloper runs fine on the one inch jet block. Hope this helps a bit.

[Gadorey]

Thanks Alan, but the 6/024 carb on the Sloper is 1 1/16", so it would have to be a jet block of the same size. If I can't find one I will probably have to find a later 276 carb of that size.

[Steve.S]

I know it's a long time ago, but you mentioned this post recently in your reply to B31 lack of performance. Sounds like you still have a problem?
You seem to have identified 2 culprits, so were you able to get the correct size jet block and another inlet cam?
Both of these will surely make a difference.

[Gadorey]

Hi Steve,
I couldn't find the correct jet block for the original carb, but I installed a new 276 Amal. The cam profile was just a suspicion which didn't confirm itself.

The problem remains with the new carb which I am confident to have it properly tuned. It accelerates to about 80km/h and can stay there all day, but it doesn't really go beyond that. I have run out of ideas...
Cheers
Gui

[jleh]

Hello!
New here, but driven my 1028 Sloper about 20 years now.

When I read this thread, I think that problems may be in valve springs. Maybe them needs more pre load?
Loose springs cuts easily top revs.

B.R.
Jari

[classicmotorcyclemanuals]

I have reprinted a number of Pitman Books of the BSA by Waysider 1929. https://bsamanuals.com/product/bsa-1929-waysider/  at £17.99

I also have some books where a couple of the photos were a bit grainy nothing major) hence second quality  I can sell these at £10 including UK postage.

my e mail and paypal is stevearch58@hotmai.com

The 1926 Flat Tank version of the BSA Waysider book will be available next week at £20 inc UK postage (only 25 printed) these are good quality perfect bound (paperback) book printed in the UK.

[MDeneve]

 Dear BSA friends
I'm looking for two « Valve push rod with ends» ref 24-600(2) for my BSA Sloper (1930) .
Can you help me ?
Thank you in advance.
Michel Deneve
Belgium