mixture coming out of the silencers, gt350
Posted: Sat Oct 20, 2018 1:05 pm
as most will know, i've built a full size suzuki gt350 engine - based on a pair of 64mm pistons from a ts185 and 54 stroke, giving me roughly 347cc, the same as the rd350. engine starts first kick every time, hot or cold, but putting my hand behind any of the silencers and blipping the throttle leaves my hand with a big patch of mixture on it - obviously running a tad rich i used the rd350 carb jets as my baseline [carbs are my worse nightmare], so i've got a pair of standard gt250a carbs, vm28's, 130 main jets and #30 pilot [was going to use #25], needle in middle position, 2.5 cutaway on the slides. where the hell do i start? main jets? needle height? i really am crap when it comes to carb tuning, so any help with this would be gratefully accepted i know my way round carbs, but that's about it. i just need somewhere to start. btw, plugs are ngk b7's, air filters are k&n type, which will be replaced when my airbox rubber and filter get here. exhaust system is standard gt250. removed the plugs and there's a tiny blob of oil on the outer electrode, that's all. also once warm and the choke off, it will happily tick over any help out there please?
cheers, dd.
cheers, dd.