bondy Posted April 17, 2013 Report Share Posted April 17, 2013 hello guys ive just bought a mukuni carb for my 198B it came ready jeted the pilot jet is 30 .and the main is 130 starts up easy but i cant seem to set it up ive tryed the air screw i must say im not the best at tuning the carbs. the bike idels ok but is runing 2 rich any help would be helpfull cheers bondy. Quote Link to comment Share on other sites More sharing options...
basecampkid Posted April 17, 2013 Report Share Posted April 17, 2013 Hello Bondy, on the Mikuni bear in mind that with an air screw you turn it out to weaken and in to richen ,as with a mixture screw found on most dellorto carbs its the opposite out to richen and in to weaken,try approx 1.5 turns out as a base setting. Quote Link to comment Share on other sites More sharing options...
bondy Posted April 17, 2013 Author Report Share Posted April 17, 2013 hi mate thanks for that i will try it tomorrow. it did come set at 1 and a half turns out but i was told start at 2 and a half turns out but i thinks that only applies to the older carbs like amal and bing. these are a moden carb so i gess dosant need as much but its so frustrating trying to set it i had a bing on a 199A i had that set just right. cheers bondy Quote Link to comment Share on other sites More sharing options...
bondy Posted April 19, 2013 Author Report Share Posted April 19, 2013 hello guys ive got the bike runing ok starts easy took it for a blast today only round the back garden a few laps its pulling great seems to be ticking over ok but there seems to be slputers of oil coming from the exhaust may be because its not been riden for some time didnt seem to be as much since puting new mikuni carb on just took plug out for a look photo hear. Quote Link to comment Share on other sites More sharing options...
pschrauber Posted April 23, 2013 Report Share Posted April 23, 2013 Looks like the either the mixture is still too fat or the plug could be a little bit colder. I had a similar look of the plug with a in my personal view very good adjustment of the carb, so I recently replaced my standard plug which is a NGK BP5ES to BP4ES and the plug looks much better now, hazel brown in the middle (electrode) and very dark brown on the outer ring. If you feel comfortable with the carb adjustment and you still have a too wet looking plug a switch to a colder plug might help. Quote Link to comment Share on other sites More sharing options...
mung Posted April 23, 2013 Report Share Posted April 23, 2013 Something to consider-if you went from NGK 5 to NGK 4 you went to a hotter plug. Quote Link to comment Share on other sites More sharing options...
pschrauber Posted April 24, 2013 Report Share Posted April 24, 2013 (edited) Something to consider-if you went from NGK 5 to NGK 4 you went to a hotter plug. Yep very true I mix it up very often as the Bosch and Beru plugs count up for hot and NGK down: Edited April 24, 2013 by pschrauber 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.