i gotta make a start on the spondon framed bike next.........

tony i ended up with .50 pilots, the original needles jacked up about 1mm and 210/215 mains - with the bmc race filter.tony.mon wrote:Fitted Brisk spark plugs, and used Benny's patent airscrew adjuster- he gave it to me ages ago, but I haven't needed it up to now, but I need alrger mains and they're still in the post, so i thought I'd richen it up a nadge on the screws for now, rather than leaving it running lean.
A pair of 190 jets on their way, might need richer still, but one step at a time.
I was using Keihin sizes in the comment above, I realised after Carl asked which ones I was using that I had been using some Dynojet jets, that a Dyno operator had used, but switching from one size to another when setting up on the dyno on that occasion didn't seem very logical- a bigger jet made it run leaner on one occasion- and it was only after Carl's comment that I sussed what was going on.benny hedges wrote:tony i ended up with .50 pilots, the original needles jacked up about 1mm and 210/215 mains - with the bmc race filter.tony.mon wrote:Fitted Brisk spark plugs, and used Benny's patent airscrew adjuster- he gave it to me ages ago, but I haven't needed it up to now, but I need alrger mains and they're still in the post, so i thought I'd richen it up a nadge on the screws for now, rather than leaving it running lean.
A pair of 190 jets on their way, might need richer still, but one step at a time.
not a great deal of difference in fuel economy tbh. still does about 120 to the light unless i spank it hard, then its terrible lol, lowest was 59 miles!![]()
Tony. Are you on the 4th clip on both needles? What are your thoughts on setting one clip up on rear needle? Or a shim on rear? Just playing with it myself- recent setting (today) was 5th clip front & 5th clip plus shim rear (factory pro) - ran poorly mid range so think its too rich. Carbs off again! Griff.tony.mon wrote:I was using Keihin sizes in the comment above, I realised after Carl asked which ones I was using that I had been using some Dynojet jets, that a Dyno operator had used, but switching from one size to another when setting up on the dyno on that occasion didn't seem very logical- a bigger jet made it run leaner on one occasion- and it was only after Carl's comment that I sussed what was going on.benny hedges wrote:tony i ended up with .50 pilots, the original needles jacked up about 1mm and 210/215 mains - with the bmc race filter.tony.mon wrote:Fitted Brisk spark plugs, and used Benny's patent airscrew adjuster- he gave it to me ages ago, but I haven't needed it up to now, but I need alrger mains and they're still in the post, so i thought I'd richen it up a nadge on the screws for now, rather than leaving it running lean.
A pair of 190 jets on their way, might need richer still, but one step at a time.
not a great deal of difference in fuel economy tbh. still does about 120 to the light unless i spank it hard, then its terrible lol, lowest was 59 miles!![]()
So back to some baseline settings, then one step at a time to get it sorted again.
50 pilots are in already, Factory Pro needles on fourth from the top.
Having said that it's not running badly atm, so it's clearly not far off.
I'll have it sorted for the Dales weekend.
Cheers Carl. What inside diameter washers do you use? Looking at 2mm or 3mm? I should have measured when I had the carbs off on Sat night. I used a spring clip that i flattened-not ideal for the job! Plenty of proper washers on ebay just want to get the right size. Griff.cybercarl wrote:0.5mm or 20though higher the rear should be. If you measure the standard needles you will notice one is slightly shorter than the other and have different part numbers.
(:-})
Both on the same clip.Griff1977 wrote:Tony. Are you on the 4th clip on both needles? What are your thoughts on setting one clip up on rear needle? Or a shim on rear? Just playing with it myself- recent setting (today) was 5th clip front & 5th clip plus shim rear (factory pro) - ran poorly mid range so think its too rich. Carbs off again! Griff.tony.mon wrote:Fitted Brisk spark plugs, and used Benny's patent airscrew adjuster- he gave it to me ages ago, but I haven't needed it up to now, but I need alrger mains and they're still in the post, so i thought I'd richen it up a nadge on the screws for now, rather than leaving it running lean.
A pair of 190 jets on their way, might need richer still, but one step at a time.
tony i ended up with .50 pilots, the original needles jacked up about 1mm and 210/215 mains - with the bmc race filter.
not a great deal of difference in fuel economy tbh. still does about 120 to the light unless i spank it hard, then its terrible lol, lowest was 59 miles!![]()
I was using Keihin sizes in the comment above, I realised after Carl asked which ones I was using that I had been using some Dynojet jets, that a Dyno operator had used, but switching from one size to another when setting up on the dyno on that occasion didn't seem very logical- a bigger jet made it run leaner on one occasion- and it was only after Carl's comment that I sussed what was going on.
So back to some baseline settings, then one step at a time to get it sorted again.
50 pilots are in already, Factory Pro needles on fourth from the top.
Having said that it's not running badly atm, so it's clearly not far off.
I'll have it sorted for the Dales weekend.