hi Andy John Bass here ...I too have a new tiger king in my SGX...just a few tanks of fuel through it...i am using the marathon non ethanol fuel and 8 oz of mercury oil....just opened the engine up to find that the transfer ports were some what blocked...matched them to the liner and port matched both the intake and exhaust ...i have 2 pipes a 7/8 QD style and a new 1 inch stainless from Carlo at CC.....any tips on length or dia. ...the idea of the nitro carb is something i have been interested in for some time....other than Making a new intake is it hard to do??? Thanks for all the tips...ps my driving is getting much better.....JB out