Print Page - Engine Info and PVL

Title: Engine Info and PVL
Post by: Jeffrey Bruce on July 25, 2019, 02:04:09 PM

Can anyone assist with helping me identify what KTM engine this is?
Serial number 8-5419020
Also, what if any, issues do any of you have starting your engines with a PVL. Any weight need to be added to flywheel or not?

Thanks in advance!!

Title: Engine Info and PVL
Post by: chicagojerry on July 25, 2019, 02:37:01 PM

that's a 78 250... pvl's work great. yes. i would put a heavier flywheel weight on it. what is your intended usage? mx or off-road? some big bores. 465 yamahas as an example have trouble spinning the engine over fast enough to obtain initial spark. i run a pvl on my mint 400 and it has always started well. chicago jerry

Title: Engine Info and PVL
Post by: Jeffrey Bruce on July 25, 2019, 03:18:41 PM

My engine builder is recommending I stay with the Motoplat and not use the PVL. Planning on just hare scramble racing the bike, no lights.

Title: Engine Info and PVL
Post by: JP Morgen on July 26, 2019, 02:52:58 AM

I would stick with a Motoplat, also less likely to stall. I worked on a friend's 400 and it was impossible to kick it over fast enough to get the PVL to spark, with no added weight. Throw a Motoplat on, started first kick! On my vintage mx race bike with reed valve and more, I added 3 lbs. of brass to the outside of the external Motoplat flywheel to make it rideable.

Title: Engine Info and PVL
Post by: Jeffrey Bruce on July 26, 2019, 11:58:11 AM

Thanks all!

Penton Owners Group

General Discussion => Penton Talk => Topic started by: Jeffrey Bruce on July 25, 2019, 02:04:09 PM