superhondaman Posted December 31, 2007 Report Share Posted December 31, 2007 Anyone have the settings for a 199cc cub fitted with a 22mm dellorto, jets/needle position etc. Quote Link to comment Share on other sites More sharing options...
trickymicky Posted December 31, 2007 Report Share Posted December 31, 2007 Hi Kirby, Heres the settings for my 250 Cub- DELLORTO- TYPE PHBL 20 (20MM) 40 SLIDE D40 NEEDLE BZ 260 ATOMISER 9.5 FLOAT 45 CHOKE 35 PILOT (2.25 TURNS) 105 MAIN AMAL- TYPE 622 105 NEEDLE 110 MAIN 3.5 SLIDE Yours may be a PHBL 22,depending how long ago it was bought as the PHBL 20 was discontinued i believe. A 200 cc Cub may differ from these a little, but i doubt it and at least its a reference to start with. I've found the Villiers carb is superior to either of the above and if you decide to go down that route, Mick Grant sorted mine, they need altering to work correctly. Quote Link to comment Share on other sites More sharing options...
superhondaman Posted January 1, 2008 Author Report Share Posted January 1, 2008 Hi Mick thats very close to mine, only difference is main jet i have a 100 fitted. I can not get it to run right yet. going to 1/2 throttle it wont rev past that, its a feeling like a rev limiter has cut in. Maybe its not carburation and something else? Plug is black & sooty as is the tail pipe, which would suggest too rich? I have played with needle hight until i feel it is at its optimum setting, 2nd notch from top, also tried a 108 main (from Mark Daniels 250 cub) and that made it worse, and then tried a 92 main (from my Fantic) which allowed it to rev a little more but still with the same problem. Any thoughts greatly appreciated! p.s. the carb was brand new supplied by Serco's Martin Adams. Quote Link to comment Share on other sites More sharing options...
old trials fanatic Posted January 1, 2008 Report Share Posted January 1, 2008 Could also be worth checking the ignition timing? Does it have a pvl fitted ? Are you sure if it has that it has a 4 stroke pvl itted not a 2 stroke one as the advance curves are totally different. Worth checking. Quote Link to comment Share on other sites More sharing options...
superhondaman Posted January 1, 2008 Author Report Share Posted January 1, 2008 Had pvl fitted by martin Adams. Would that give those symptoms then. Quote Link to comment Share on other sites More sharing options...
alan Posted January 3, 2008 Report Share Posted January 3, 2008 I had the very same problem develop with a new dellorto, 1/2 way through a trial, i could not get the engine to rev past 1/2 throttle. I messed around with carb for ages, then replaced the PVL at great expense to no avail. As a last resort I fitted the carb of my old TL125... Instant cure! I cannot find any obvious problem with the dellorto...... any suggestions welcome...... it would be nice to think I could use it again some day. Quote Link to comment Share on other sites More sharing options...
superhondaman Posted January 3, 2008 Author Report Share Posted January 3, 2008 Got it sorted today. i had to retard the pvl ignition and ended up with a 85 main jet, needle set at 2nd notch from top. Retarding it has stopped it kicking back now as well. It will pull smoothly in 3rd without hessitation. Was running a BP5HS but it seems a lot are running a 4? Whats the consensus on plugs. Quote Link to comment Share on other sites More sharing options...
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