Penton Owners Group

General Discussion => Penton Talk => Topic started by: Bill Campbell on June 01, 2014, 05:40:30 AM

Title: Jack Penton Replica
Post by: Bill Campbell on June 01, 2014, 05:40:30 AM
I am going to make a 250 enduro using a 78 MC5 frame and thought I would try and replicate the last Penton that JP rode. My thoughts are it is basically an orange frame and plastics motorcycle. If anybody out there could post some photos or a pen picture I would really appreciate it.
Cheers Bill
Title: Jack Penton Replica
Post by: brian kirby on June 01, 2014, 10:14:16 AM
Its a silver frame '77 250 GS6 and he still owns it. From the '10 Reunion Ride in Combs, Arkansas.

(http://i1177.photobucket.com/albums/x348/kartwheel68/DSC_0108_zpsfceaa819.jpg)

Brian
Title: Jack Penton Replica
Post by: Tflores on June 01, 2014, 04:50:56 PM
The one right next to it is my GS and I have the original orange side panels but take them off when racing to keep them in the exceptional condition they are in. The front lighted number plate is also original and orange.  I picked up a set of orange Preston Petty fenders just like the ones on JP's from Paul Stannard of Strictly Hodaka. Tom

Tom Flores
72 Penton Berkshire
77 Penton GS6 250
07 KTM 300XC
Title: Jack Penton Replica
Post by: rob w on June 01, 2014, 09:20:11 PM
BUT..........there's one thing on Jack's bike, you won't find anywhere in the world. See that cylinder - I asked about it last Oct. at the ISDTRR, and Carl Cranke was standing right there as well. I did'nt get a direct answer to what was so special about it - other than it is a special cylinder. :)
Title: Jack Penton Replica
Post by: brian kirby on June 01, 2014, 09:32:50 PM
Yes, Jack told me that was a "special" cylinder too that Carl did for him, but did not elaborate on why it was special and I did not ask for further details. :D

Brian
Title: Jack Penton Replica
Post by: Gary Roach on June 01, 2014, 09:36:30 PM
I helped get this bike back together for Jack so that he could ride it in the '03 Reunion Ride.
 
A few notable things about his bike:

The chain adjusters, and front and rear axle are painted orange, which is something that he did "back in the day" so that they can be seen when they were layed on the ground.
 
The left chain adjuster and wheel spacer are welded together, which helped when the rear wheel had to be pulled.

The pipe has a SuperTrapp spark arrestor.

It has a Lectron carb.

Jack used a band saw to cut the corners of the cylinder and head off on all of his Carl Cranke ported cylinders.

I don't know what shocks that he used back in the day, but the ones on it now are a pair of Fox shocks that I had.

(http://i1267.photobucket.com/albums/jj550/Gig755/CopyofJacksPenton2_zps15fc1d0d.jpg)

(http://i1267.photobucket.com/albums/jj550/Gig755/CopyofJacksPenton1_zps8919061a.jpg)

(http://i1267.photobucket.com/albums/jj550/Gig755/pict0022_zps8b580a71.jpg)

(http://i1267.photobucket.com/albums/jj550/Gig755/JacksPenton3_zps268cfd69.jpg)

(http://i1267.photobucket.com/albums/jj550/Gig755/Copyof100_1664_zps0dfb8b83.jpg)

(http://i1267.photobucket.com/albums/jj550/Gig755/Copyof100_1667_zps9a07fac1.jpg)

(http://i1267.photobucket.com/albums/jj550/Gig755/dsc04850_zps04760d91.jpg)

(http://i1267.photobucket.com/albums/jj550/Gig755/dsc04885v_zps97211db0.jpg)

(http://i1267.photobucket.com/albums/jj550/Gig755/Jack_zpsc51d4645.jpg)


Gary
 


Title: Jack Penton Replica
Post by: rob w on June 01, 2014, 10:00:45 PM
Thanks Gary, My answer for your trivia question: um, maybe there was a fin or two broken on the cylinder, so to make it look better, it would be easiest just to cut them off.

(http://i52.photobucket.com/albums/g8/BobWardlow/POG%20pictorial/jack_zps9ee51331.jpg)
Jump'n Jack Flash at the '03 Reunion, beating Fredette
Title: Jack Penton Replica
Post by: Paul Danik on June 01, 2014, 10:16:49 PM
At the ISDTRR this past year Jack brought a nice stable of machines along, including the bike being discussed and pictured. On the second day he assigned that machine to me, what a treat it was.  Before I rode the bike I figured I might have my hands full with a machine that would hit hard and possibly be a handful on the dual sport style Legends Backroads Tour...but just the opposite was the case.

That machine starts very easy and is a joy to ride, the power delivery is very smooth which allows it to hook up quite well as it increases it's velocity. Carl's mastery of the power delivery thru numerous areas such as the porting, pipe and compression, plus a few others areas as well, is truly phenomenal.

The only issue I had was the seat height, but I never mentioned that to Carl as he possibly would have wanted to use some sort of medieval contraption on my stubby legs.

Bill, best of luck with your project.

Paul
Title: Jack Penton Replica
Post by: brian kirby on June 02, 2014, 07:56:48 AM
That was something Jack mentioned to me about the power, he said it was the smoothest 250 Penton he had.

Brian
Title: Jack Penton Replica
Post by: Bill Campbell on June 03, 2014, 03:42:24 AM
Thanks for the input and pics guys. Looks like it will be a silver frame. Would be nice to get a hold of the specs for the cylinder. Is there anything in the old posts? The other question is what did Jack ride in 1978?
Cheers Bill
Title: Jack Penton Replica
Post by: brian kirby on June 03, 2014, 12:05:06 PM
You could do a '78, but technically its a KTM not a Penton, which is why Jack says that '77 is the last Penton he raced.

Brian
Title: Jack Penton Replica
Post by: Bill Campbell on June 04, 2014, 05:10:34 AM
I think I have made it more difficult than I first imagined with the look of the bike. Remember here in Oz there were no Pentons as such just KTMs. I thought an orange bike would sort of like what Jack rode would be a slight link between then and now. An orange framed 78 with white guards & tank or a silver framed 78 with orange guards and tank that is the question.
Title: Jack Penton Replica
Post by: SouthRider on June 04, 2014, 08:42:51 AM
Remember - the only difference was the name on the tank & seat, and a few decals on the bikes.

Other than that - the Pentons had minor changes when they arrived in Ohio, as each load of incoming bikes were customized with whatever race mods were working for the team at that point (they truly were sold "as raced" by the Penton team).

If you built a 77 orange bike you could certainly put Penton decals on the tank. But in 78 all the bikes were white KTMs.

_____________________________________________________________________________________

"We the willing, led by the unknowing, are doing the impossible, for the ungrateful. We have done so much, for so long, with so little, that we are now qualified to do almost anything, with nothing."

1972 Penton Berkshire 100
1983 Husqvarna 250 XC
2011 Jayco 31.5 RLDS
2009 Chevy 2500 HD Duramax
Title: Jack Penton Replica
Post by: Bill Campbell on June 09, 2014, 07:02:42 AM
Thanks for the input gents. Will go with a silver frame and orange plastics even though it is a 78 frame. Might even put Penton decals on it!
Title: Jack Penton Replica
Post by: Bill Campbell on February 15, 2015, 06:18:01 AM
I'm up to restoring the forks. Were they painted frame silver or were they polished and have oxidised? Thanks
Title: Jack Penton Replica
Post by: brian kirby on February 15, 2015, 11:39:20 AM
They had some sort of goldish/green coating on them, I have never heard what exactly the coating was, but most of them it is long gone now and only bare magnesium is left, or they have been painted.

Brian
Title: Jack Penton Replica
Post by: Bill Campbell on June 05, 2016, 04:08:10 AM
Hi guys this is my take on Jack's Penton. It nowhere a copy but the best I can do. I have started the bike but yet to take it for a ride. Picture is not that good as it has been raining here for two days.
(http://i1097.photobucket.com/albums/g356/ozktm151/IMG_1589.jpg) (http://s1097.photobucket.com/user/ozktm151/media/IMG_1589.jpg.html)
Title: Jack Penton Replica
Post by: brian kirby on June 05, 2016, 03:38:23 PM
Looks great!

Brian
Title: Jack Penton Replica
Post by: Toolsurfer on June 10, 2016, 04:18:27 PM
Looking good from my perspective!!
Title: Jack Penton Replica
Post by: Mike Schulz on June 10, 2016, 08:33:28 PM
Nice job Bill! Hope she runs as good as she looks!
Mike Schulz
Title: Jack Penton Replica
Post by: Toolsurfer on June 10, 2016, 04:18:27 PM
Looking good from my perspective!!
Title: Jack Penton Replica
Post by: Mike Schulz on June 10, 2016, 08:33:28 PM
Nice job Bill! Hope she runs as good as she looks!
Mike Schulz
Title: Jack Penton Replica
Post by: Bill Campbell on September 17, 2016, 09:20:29 PM
Took "Jack" out last weekend for his first serious ride. As usual the motor feels completely different to my other 250 motors. This one actually pulls from down low with next to no loading up and accelerates smoothly building power without all of the hit of some of the others. Perhaps I am getting older ( slower) and have forgotten how the others go. I did try to set the ignition for low end power and the exhaust is a bit of a weld together job but overall I think the power is what i was looking for. Who needs a Mikuni! I also came away from the weekend with a late 76 GS6 Jackpiner project. Did Tom Penton ride these in '77 ? Before I get into this the Steel Tanker has to get under way. Hope your winter is a warm one. Bill
Title: Jack Penton Replica
Post by: Andreas Piepke on September 18, 2016, 08:44:59 AM
Nice bike! Post some "in action" pictures.

Andreas

'73 Penton Hare Scrambler
'73 Norton Commando
'77 Maico 440 GS