I have ran this motor in truggy for 3 gallons and buggy for about a half Gallon. The 9886 and 41021 (7.5mm)have been a great combo for me in both. Runnin 4 shoe medium werks clutch. Run time isn't spectacular but I'm keei get the engine under 250 so I can't complain with 8 minutes. It was great with high traction in the buggy, I have only ran it in the truck with a loose and loomy track. I have to say as long as I can get a Paloma that will be my engine of choice! I've ran about everything and have to say I like the Paloma the best for any conditions. Tuning is great it holds a tune very well, it doesn't take long to warm up unlike a lot of Rossi engines. All in all I recommend this motor to everyone locally.