In all my price sheets there is different models the early bikes were called the Challengers they were the ones with the gear shift arm and the rocking motor plate. most of these came with the 5 HP Briggs and had the Powell clutch system and the plastic belt guard.
Then came the Challenger's with the Tecumseh engines and one February 1970 sales sheet showed a 4 HP engine and it had lights and a shift lever called a Neutral selector and had a belt drive with advertised ratio's of 16-1 to 6-1 and used the plastic type belt guard this model was called the Powell Challenger II and sold for $215.00
About 1972 when I became a Powell dealer they made the change to the Comet cat 99 torque converter and the stamped metal belt guard.
The next was the Super Challengers Model M came with a 3 1/2 HP Tecumseh engine with spark arrester and 2 quart tank. and list price was $179.00 and the L model with the 5 HP Tecumseh sold for $199.00
Then the Phantom 7 bike was brought out with the Tecumseh engine and a 1 gallon tank and it sold for $225.00 and then the Street legal JL model came out with the 7 HP Tecumseh engine and all the things required to make it street legal in California such as front brake, fenders, horn, mirror and of course a head light with high and low beam and a brake light . A battery was required to maintain full lighting while engine was idling .
I had one of these JL bikes and it was a real kick to ride all over Long Beach, California this of course id the most rare of all the Powell bikes and my hope is to some day find the barn full of Powell's and have the money to buy them all.
Steve