Recent posts

#61

Wanted / For Sale / Re: Rod kit 400

Last post by Daveswelding - April 27, 2026, 10:24:53 PM

Hi Gary, this is a long shot but you might try RTRMOTO.COM. Phone number 303-873-8924. Good Luck.

#62

Wanted / For Sale / Rod kit 400

Last post by G Ellis - April 27, 2026, 07:00:39 PM

Wanted Penton 400 rod kits, 69mm pin length.

#63

Penton Talk / Re: '75 250 Enduro Head/Tail L...

Last post by KJDonovan - April 27, 2026, 04:57:00 PM

Steve,

The original Motoplat puts out 6V. So if you already have the Preston Petty front plate 6V bulbs would be the way to go.  That stated, if you don't already have the plate, check out the battery powered ones with the LED headlamp offered by Preston Petty.  Way brighter, and not a lot more coin than the standard one.

Thanks,

Kevin

#64

Penton Talk / '75 250 Enduro Head/Tail Light...

Last post by StephenRead - April 26, 2026, 06:42:47 PM

I have a 1975 250 Enduro with lights and Motoplat Ignition.  The bike is currently not running as I am restoring it.  I'd like to run a Preston Petty front number plate headlight and the original round tail-brake light.  My original Penton Manual says the ignition is a 35 watt output.  Should I be running 6 or 12 volt bulbs ?  Thanks for any insight.

#65

Penton Talk / Re: Transmission oil

Last post by KJDonovan - April 26, 2026, 07:30:30 AM

Jerome,

Either BelRay 80W Gear Saver or Type F ATF.  1.5 quarts.

Thanks,

Kevin

#66

Penton Talk / Transmission oil

Last post by Jerome - April 25, 2026, 08:34:50 PM

Hello I'm a new member  I have a 1974 ktm penton 400 what type of oil should I use in the transmission and how much

#67

Penton Talk / Re: Motoplat timing

Last post by Jerome - April 24, 2026, 04:57:20 PM

looking for some procedure and tips to set the timing on a 74 6-days.  I searched but could not fimd anything.

#68

Penton Talk / Re: ignition timing

Last post by Carl Hill - April 22, 2026, 06:34:05 PM

It says 2.5mm BTDC. I've never built a 400 but on the smaller ones I've done I generally end up retarding the timing a bit. Seems to help with low rpm response. As they say in the commercials " your actual results may vary". If you have the external rotor version there is a small hole in the flywheel that will line up with another one in the stator. Use a long pin to slide through both to move the stator to the desired timing. Internal rotor version just has two marks to line up.

#69

Penton Talk / Re: ignition timing

Last post by slvrbrdfxr - April 22, 2026, 09:43:57 AM

Jerome,
Welcome to the group ! If you use the search function on this site and enter the word "timing" you'll find there are quite a few threads which discuss how to set the timing on the Motoplat ignition. Good luck !
Dave McC

#70

Penton Talk / Re: ignition timing

Last post by Jerome - April 21, 2026, 05:11:06 PM

Hello it has the Motoplat electrónico stator assy which is adjustable along with the base it mounts to which is adjustable any help would be great thank you