Penton Owners Group

General Discussion => Penton Talk => Topic started by: Chakka on December 17, 2007, 01:41:13 PM

Title: Jackpiner Crank Thread Size Needed
Post by: Chakka on December 17, 2007, 01:41:13 PM
Hi Guys,

The threads on the side of my 175 crank that hold the primary drive gear on are messed up and I'd like to chase them before putting the engine back together. The shop manual says its a 14mm. I need to know if it's an M14 x 1.5mm or an M14 x 2mm. It is a silver model (late 74) engine with the larger crank.

Thanks
Chris
Title: Jackpiner Crank Thread Size Needed
Post by: Rain Man on December 18, 2007, 03:57:33 PM
Chris I have a 1973 JP crank here on the bench and its measures
  M14 X 1.5mm.  I'm not sure about the later crank like you have.

Raymond
 Down East Pentons
Title: Jackpiner Crank Thread Size Needed
Post by: Rain Man on December 18, 2007, 04:05:38 PM
Woops I forgot I have a 1974 JP silver motor too [:o)]  #4-5206644 and thats a M14-1.5mm also.

Raymond
 Down East Pentons
Title: Jackpiner Crank Thread Size Needed
Post by: Chakka on December 18, 2007, 07:42:58 PM
Hi Raymond,

Thanks very much for that info. I don't have a thread gage...not that it would even work as the threads are mushed. I placed an order with Mcmaster-Carr for the die today.

Your located in Maine right? Do you ever ride in CT? I am just outside of Hartford.

Chris
Title: Jackpiner Crank Thread Size Needed
Post by: Rain Man on December 20, 2007, 01:48:08 PM
Chris, matter of fact I do.  The local dirt bike club has a Vintage Friendly Hare scramble every fall @ a farm in Soemers Conn. pretty good time, other than the late model bikes want to run you off the trail [8D] (ya where racing).
 Every July in Mid conn. they have a big vintage moto cross race.
 I think the Nut meg riders have something to do with the Vintge stuff ??

Raymond
 Down East Pentons
Title: Jackpiner Crank Thread Size Needed
Post by: Merlin on December 20, 2007, 06:01:12 PM
ACR,Central Village

Quote: Thomas Jefferson, We are all born ignorant, some work to remain that way.
 Quote:Merlin, "it is impossible to teach those that wish not to be taught".
Title: Jackpiner Crank Thread Size Needed
Post by: Rain Man on December 21, 2007, 02:59:51 PM
Ya thats the place, Central Village. They got a wicked cool  Vintage track there, and a whole bunch of  trail riding too.
 Thanks Merlin, someday I'll remember all these races, tracks, towns and the clubs that sponsor the race to!! Just as long as they dont change the dates like they did @ Southwick for 2008.:D
  Chris, I live near Sebago lake Maine. About 25 miles NE of Porkland Me. My friends and I Usually do 10  rides a season from my yard on Sunday. Anywhere from 5 to 20 fast riders, 75 to 100 miles.   Great times are always had by all. (KTM's ONLY ;))

Raymond
 Down East Pentons