Howdy Howdy! A huge” Thank you” to all those experienced motor bikers who post their knowledge and valuable info on this forum. Your time and patience is greatly appreciated by us Newbies. I recently discovered motor biking while looking for a lightweight , portable, motorcycle or scooter to do vehicle shuttles to the end of river float trips. Living in the mountains at 8,128 ft. above sea level, I was concerned that the Chinese 2 stroke engine may not perform well or be able to handle the hills around here. After a lot of research and information gathered on this forum, I jumped into my first motored mountain bike build. There were a few challenges and a few setbacks. Finally, I’m became the proud father of an awesome, motored mountain bike that runs great, lots of power on the hills, 39+ mph on the flats and I have not yet gone WOT. Yee Haa! Here is my setup for : THE RED BARRON -19 “ Specialized M2 Stumpjumper 8 spd. circa 1995 (very tight engine fit, custom front mount) - Judy Rock Shock and Front disc brake (absolutely necessary) - 2011 Grubbe Skyhawk Silver Slant head 66 cc (milled, portmatched ,copper gasket sealer) - SBP Shifter Kit (extra Chain Ring spacer mods and added inside chainguard) - SBP Exhaust Expansion Chamber (up mounted position ,custom leg protector and mounts) - RT performance Carb 15.5mm from thatsdax - #64 jet (I gave up on the CNS Carb) - NGK BPR7HIX Iridium Spark Plug and upgraded cap and wire - Custom front light system and lots of reflector tape for safety. - Gel seat, fenders and thorn resistant tubes Lessons learned after first build: -Go slow, be patient, and do upgrade modifications upfront and assembly right the first time -Install “Jump Stop” on shift kit correctly (I put mine in backwards, causing catastrophic derailments that wound up ruining the the front sprocket freewheel $69) - Don’t waste time on getting the CNS carb to work, get the RT Performance carb from thatsdax. Aside from shortening the throttle cable and switching to a #64 Jet, it was plug and play. The rotating fuel intake, throttle cable noodle and overall small size helped a lot getting things to fit in this tight frame. -Good brakes a must! I can’t wait to get started on another bike for my girlfriend and then a boardtrack replica for this winter’s basement project. Until next time, -- build smart, ride safe, love life.