Ti valves - lap or not?

H

Hakka

Member

May 12, 2002

2

0

• Aug 23, 2004

• #1

Due for new valves in my wr250f, I've heard differing opinions on lapping the valves in these motors, some say it wears away the hardened coating on the valve and makes it wear quicker?

Opinions?

Thanks.

 

B

biglou

• Aug 24, 2004

• #2

I'm going to move this to the Thumper Forum where Rich and some others will likely see it sooner. :cool:

 

Rich Rohrich

Moderator / BioHazard

LIFETIME SPONSOR

Jul 27, 1999

22,839

16,904

Chicago

• Aug 24, 2004

• #3

You can't lap the OEM titanium valves. You recut the seats to the correct 45 degree angle and seat width using carbide tooling and check the seat contact on the new valve with Prussian blue. If you lap the valves and take the surface coating off you'll be buying valves again in short order.

 

Last edited: Aug 24, 2004

H

Hakka

Member

May 12, 2002

2

0

• Aug 25, 2004

• Thread starter
• #4

Thanks Rich.