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Title: 1974 250 HS
Post by: Richard Carlson on May 04, 2018, 01:02:21 PM

What is the minimum compression on that motor?

Title: 1974 250 HS
Post by: G Ellis on May 04, 2018, 02:18:16 PM

90 to 100psi.

Title: 1974 250 HS
Post by: Richard Carlson on May 04, 2018, 02:44:31 PM

Thank you, I have around 100psi, bike has been in the barn for 30+
years and I have restored it just having trouble getting it to run.
I poured gas in the cylinder and it fired after 2 kicks and idled for a sec put on the gas tank and it ran on full choke but seemed loaded
up put new needle and screen in the carb hasn't run since thinking maybe crank seals or float level or floats. Help!

Title: 1974 250 HS
Post by: Larry Perkins on May 04, 2018, 03:32:26 PM

What Gary gave you is bare minimum. To run well it will probably need to be bored.

Larry P

Title: 1974 250 HS
Post by: G Ellis on May 04, 2018, 04:06:39 PM

If it will run on full choke, Pilot jet is plugged.

Penton Owners Group

General Discussion => Penton Talk => Topic started by: Richard Carlson on May 04, 2018, 01:02:21 PM