Curt's shroudless advise is spot on.
The engine is not running stationary. Do motorcycles have blower fans?
My 1950 Harley and my 1979 R80/7 BMW don't have fans.
When the recoil start of my 79cc took a crap. I removed it. What to do with the plastic fan? Copper chisel got rid of it in short order without damage to the cast iron fly wheel. The manufactures must expected the recoil start to fail. When the shroud is off there is a rope start spindle. Before recoil start anything, You engaged a knotted end of a rope wound at least 4 revs. the balance terminated with a wooden toggle. Pull start
Disregard 30wt for 15-40 or 20-50 in warm weather. Standard motorcycle lube in warm weather
Pant clips will save you from the dreaded cuff wind.
Amazon.com : Pant Leg Cuff Clips Bike Bicycle : Sports & Outdoors
www.amazon.com
My only drivetrain interference comes from my boot on left side bumping into the Bully Clutch.
Model Applications - Spring and weight combinations may be interchanged to suit the individual application. As you make your selections be aware that the heavier the weights and the stiffer the spring, the more positive the engagement becomes. However, with stiff springs and heavy weights, the...
www.buller.net
When in doubt, ask Curt, he is one of the few who have been here from the beginning.
Tom
Ducati and Puch both had small motorcycles with forced air cooling and it didn't hurt their performance. I know you deal with mostly performance race oriented motored bicycles. But, this guy is running on the street and frankly why would want to strip off something that would improve the engine's longetivity? And... does he have the shop tools and experience to make it into a shroudless engine and make it look and work good?
I've owned dozens of small motorbikes in my long life and presently am restoring an old Ducati bevelhead 250. These little forced cooling engines come with just enough fins to shed heat well under forced air conditions. But, If you ever looked at normal aircooled motorcycle engines they have a lot of engine mass as cooling fins.
Carrying around a starter motor? Like a battery drill? what if it gets lost or malfunctions? Pull rope starters aren't that mechanically complex, they weigh much less, and they work.