Darrell Taylor wrote:speedy wrote:Darrell Taylor wrote:the inlet size/reed size dictates the answers really,,
on a piston port large inlet manifolds/tracts like large carbs to deliver the required quantitys in the limited inlet time available
on ts1,s with old school big reed valves / inlets big carbs help but dont perform as well as a smaller carb and reed combo
on modded ts1,s with smaller reedblocks or venturised systems small carbs match the performance of bigger carbs ,the bigger carbs show better midrange power on the dyno but display poorer throttle response in use so less power with faster response times can often mean a faster machine i find this the case too often in mx and quad tuning
small reed conversions like the lth reed block like any size carb from 24 to 35 and create good throttle response but power and response and economy is not really bettered than the smallest 24mm carb
the big rb reed /inlet combo likes the bigger carbs plus the crankcase reed intake likes to take the extra full duration intake available
Thankyou Darrell, a very informative answer, that has cleared up one or two of my niggling thoughts. With this in mind, I think I shall stay on me 30mm Delly and keep me Amal for a later date. Since you have mentioned the RB, I have a question for a friend over here. He is having a second engine built at present and is going to be putting his RB 225, 58x107,with Franspeed race into another scoot. It currently runs a 35mm tmx mikuni. He was thinking, as he has a spare unused mikuni tm 30mm carb that he thinks will fit under his panel without cutting the SX panel, would it work as good as the 35mm that's on currently on that particular engine. Cheers for the advice, Speedy.
speedy
the 35mm and 30 perform the similar but the 35 has much better panel clearance so best to keep 35 on ,theres lots of mods to do to the 30mm mikuni to get it to work well too so i doubt he,ll set it up without major problems occurring
Cheers mi duck, I shall pass on that information. He thought that there may have been more clearance as the 30mm slopes back more than the 35mm. Thanks again for the help,Speedy.
