proposal nklr

[Tengai Mark Van Horn]

NKLR... ...LOL Mark I agree with the sarcasers and whiners on this list. There is just too much unnecessary stuff posted. The list should "ban for life" anyone who asks a question that has already been answered in the archives. Those who answer unnecessary questions should be given one warning before being unmercifully booted from the list. Only very short stories relating very exciting adventures should be allowed. If someone gets their bike stolen, hits a deer, or such like, they should know that everyone on the list already sympathizes. If the list would follow this think of the bandwidth (energy, and we must save the earth) that we would save. rw

[hjogden]

Hi All Putting together my '02 with an '09 head and have a question about head gaskets. My aftermarket gasket set contains a head gasket that is about 1.5mm think and seems to be standard construction with a metal ring around the cylinder and composite gasket for the rest. The head gasket that came out of the '02 when I took it apart is the same as the one that was on the '09 head I bought and is a thin (.25mm) metal sheet with a thin coating of plastic goop of some sort. I am wondering what has been the list's experience with head gaskets. Should I use the thick aftermarket one which will probably lower compression ratio but give me some added clearance between the valves and piston, or order a new OEM thin gasket? Does anyone know how close the piston comes to the valves when the engine is running? Thanks Hal in Halifax

[Jeff Khoury]

#ygrps-yiv-399368912 p {margin:0;}Others may disagree, but my $0.02. The KLR engine is already fairly "low-compression" compared to other motorcycle engines.  I would stick with the OEM gasket if it were me. I'm curious as to why you'd be worried about valve clearance, if they are correctly adjusted they obviously don't contact the pistons, correct? -Jeff Khoury

----- Original Message ----- From: "hjogden" To: "DSN KLR650" DSN_KLR650@yahoogroups.com> Sent: Wednesday, November 25, 2009 9:38:27 AM GMT -08:00 US/Canada Pacific Subject: [DSN_KLR650] Head Gasket Question   Hi All Putting together my '02 with an '09 head and have a question about head gaskets. My aftermarket gasket set contains a head gasket that is about 1.5mm think and seems to be standard construction with a metal ring around the cylinder and composite gasket for the rest. The head gasket that came out of the '02 when I took it apart is the same as the one that was on the '09 head I bought and is a thin (.25mm) metal sheet with a thin coating of plastic goop of some sort. I am wondering what has been the list's experience with head gaskets. Should I use the thick aftermarket one which will probably lower compression ratio but give me some added clearance between the valves and piston, or order a new OEM thin gasket? Does anyone know how close the piston comes to the valves when the engine is running? Thanks Hal in Halifax

[Lee Dodge]

My question is more general: 1.  Does anyone know what the 'squish area' clearance is with the stock head gasket? The Squish clearance is very important in helping control pre-ignition or 'pinging'.  When properly designed it acts as "mechanical octane" since without it a higher octane fuel needs to be used.  Eliminating design clearance (assuming it exists, and that is an assumption) or disabling it by increasing squish clearance with a thick gasket is a questionable move.  I can't believe both gaskets described are 'proper'. Lee

--- On [b]Wed, 11/25/09, Jeff Khoury [i][/i][/b] wrote: From: Jeff Khoury Subject: Re: [DSN_KLR650] Head Gasket Question To: "hjogden" Cc: "DSN KLR650" DSN_KLR650@yahoogroups.com> Date: Wednesday, November 25, 2009, 9:53 AM   Others may disagree, but my $0.02. The KLR engine is already fairly "low-compression" compared to other motorcycle engines.  I would stick with the OEM gasket if it were me. I'm curious as to why you'd be worried about valve clearance, if they are correctly adjusted they obviously don't contact the pistons, correct? -Jeff Khoury ----- Original Message ----- From: "hjogden" To: "DSN KLR650" Sent: Wednesday, November 25, 2009 9:38:27 AM GMT -08:00 US/Canada Pacific Subject: [DSN_KLR650] Head Gasket Question   Hi All Putting together my '02 with an '09 head and have a question about head gaskets. My aftermarket gasket set contains a head gasket that is about 1.5mm think and seems to be standard construction with a metal ring around the cylinder and composite gasket for the rest. The head gasket that came out of the '02 when I took it apart is the same as the one that was on the '09 head I bought and is a thin (.25mm) metal sheet with a thin coating of plastic goop of some sort. I am wondering what has been the list's experience with head gaskets. Should I use the thick aftermarket one which will probably lower compression ratio but give me some added clearance between the valves and piston, or order a new OEM thin gasket? Does anyone know how close the piston comes to the valves when the engine is running? Thanks Hal in Halifax

[k650]

I would use a new OEM gasket. You could use the thicker one if you wanted lower compression for use of octane poor gasoline. The effect of the thicker gasket would also advance the camshafts so it may be that no additional clearance be gained since the valves will open sooner. The power curve would start at a lower RPM so the net effect may or may not be increased lower RPM power. You would defiantly lose some high RPM power. You would not damage anything if you try it but would have to do the job over again if you don't like the outcome. Walt

> Hi All > > Putting together my '02 with an '09 head and have a question about head > gaskets. My aftermarket gasket set contains a head gasket that is > about 1.5mm think and seems to be standard construction with a metal > ring around the cylinder and composite gasket for the rest. > > The head gasket that came out of the '02 when I took it apart is the > same as the one that was on the '09 head I bought and is a thin (.25mm) > metal sheet with a thin coating of plastic goop of some sort. > > I am wondering what has been the list's experience with head gaskets. > Should I use the thick aftermarket one which will probably lower > compression ratio but give me some added clearance between the valves > and piston, or order a new OEM thin gasket? Does anyone know how close > the piston comes to the valves when the engine is running? > > Thanks > > Hal in Halifax > >