martyd Posted August 3, 2009 Report Share Posted August 3, 2009 Just bought a Bsa b40 with the gb engine Can anyone help with the correct gearing Also not sure if the main jet is right carb is a Amal 626 running a 160 main Recomended sparkplug? I am sure there will bemore Marty D Quote Link to comment Share on other sites More sharing options...
charlie prescott Posted August 3, 2009 Report Share Posted August 3, 2009 Hi Guy's Hi Marty, Gearing should be OK if it is a GB motor. Carb and jets down to preference, gearing will need lowering. There will be more? Regard's Charlie. Quote Link to comment Share on other sites More sharing options...
martyd Posted August 3, 2009 Author Report Share Posted August 3, 2009 thanks Charlie what rear sprocket does everyone run? As for the carberation really looking for a sharp motor as i want to ride in modern trials aswell as pre 65 And was wondering if the 160 jet was in the ballpark Marty D Quote Link to comment Share on other sites More sharing options...
b40rt Posted August 3, 2009 Report Share Posted August 3, 2009 thanks Charlie what rear sprocket does everyone run?As for the carberation really looking for a sharp motor as i want to ride in modern trials aswell as pre 65 And was wondering if the 160 jet was in the ballpark Marty D 62t for 428 chain. Quote Link to comment Share on other sites More sharing options...
bobtlr Posted August 4, 2009 Report Share Posted August 4, 2009 hey, i also just bought a bsa, what's the best ignition system for these bikes? (its still running on points now) regards bob Quote Link to comment Share on other sites More sharing options...
b40rt Posted August 5, 2009 Report Share Posted August 5, 2009 hey,i also just bought a bsa, what's the best ignition system for these bikes? (its still running on points now) regards bob Boyer is good, PVL is supposed to be better, but it depends who you buy it from as they differ. Quote Link to comment Share on other sites More sharing options...
charlie prescott Posted August 5, 2009 Report Share Posted August 5, 2009 Hi Guy's PVL from AW. Sheffield. Regard's Charlie Quote Link to comment Share on other sites More sharing options...
martyd Posted August 6, 2009 Author Report Share Posted August 6, 2009 (edited) Seems my bike is running a 520 chain with 12 front and 46 rear sprocket Marty D Edited August 6, 2009 by MartyD Quote Link to comment Share on other sites More sharing options...
trialsoldtimer Posted August 7, 2009 Report Share Posted August 7, 2009 Hi A 160 main jet sounds too big, i am running a 130 on my 410 ajs and 110 on my 250 cub so a 120 shouldn't be far off. Cheers Quote Link to comment Share on other sites More sharing options...
martyd Posted August 11, 2009 Author Report Share Posted August 11, 2009 Will have to do a plug test i advanced the timing that helped with the punch What type of yokes is best ? And how much am i likly to exchange for a billet set Are they worth it? Is the billet clutch that burtons sells(200 odd) worth the weight saving and does it let the engine rev quicker thanks again Marty D Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.