Penton Owners Group

General Discussion => Penton Talk => Topic started by: Rich Fredette on April 22, 2020, 12:09:28 PM

Title: JP 175 Coil (1972)
Post by: Rich Fredette on April 22, 2020, 12:09:28 PM
Does anyone have the testing resistance procedure to tell if coil is ok?
Also, there is a red coil on ebay from a 125 and has a red spark lead v. my black lead, are they functionally the same - if mine tests as no good? The 125 zinc mount plate is stamped "29" and mine is "HN"?

'72 Jackpiner - 175: 7-20555153
'14 Newfoundland - Keira 54kg
Title: JP 175 Coil (1972)
Post by: KJDonovan on April 22, 2020, 12:47:54 PM
Rich,

Sent you a PM - I didn't realize we were neighbors.

Thanks,



Kevin J. Donovan
Foster, Rhode Island
72 Jack Piner
72 Six Day
72 Berkshire
74 Hare Scrambler

Title: JP 175 Coil (1972)
Post by: Daniel P. McEntee on April 22, 2020, 12:48:13 PM
Try searching that out on the forum here. I believe Vance Smith, who is brilliant at rebuilding the stator coils on these, had posted specs for determining that. I think he has also said that the later model red wire coil will work with the earlier stators but the earlier black wire coil will not work with the later units.
   type at you later,
  Dan McEntee
Title: JP 175 Coil (1972)
Post by: DKWRACER on April 22, 2020, 01:43:24 PM
Hi, not to hijack this post, I do have a red lead coil if needed, came off a running bike (Penton)

Thomas Brosius
Title: JP 175 Coil (1972)
Post by: Dale Fisher on April 22, 2020, 04:18:03 PM
I'll leave this link up for a bit on a 1974 Cycle New article ask E.C. on the secrets of the Motoplat.

https://www.dropbox.com/s/dag5tggi60ifbo6/Cycle%20News%20-%20Ask%20E.C%2C%20Secrets%20of%20the%20Motoplat%2006-11-1974.pdf?dl=0

Dale Fisher

Mudlark Registry
Title: JP 175 Coil (1972)
Post by: Rich Fredette on April 22, 2020, 05:08:01 PM
That Cycle News clip is a real hoot! The ad for the Mikuni conversion hits home, 28 on mine when I bought the bike (in several uHaul cartons), ran pretty solid until latest teardown/restoration.

'72 Jackpiner - 175: 7-20555153
'14 Newfoundland - Keira 54kg