RE: Truggy Gearing
I have several different makes of truggies, been building truggies for 4+ years.
Your spur is way to small, you'll need at least 4.5/1 ratio at the tranny, at least thats as low as I'd go to still retain some form of bottom end.
Im running a 65 tooth spur (MP spur) and typically an 11 or 12 tooth
clutch, with explosive bottom end and tops out at 40+mph in like only 2 seconds, perfect for a tech track (exiting corners) and definitely has enough punch and excitement for bashing. For larger tracks or larger play grounds, add a tooth or two to the clutch bell but I wouldn't go any larger than a 15 tooth.