2 questions

[Super_KC124]

1.What is the shelf life of Dunlop 207 GP tires? 2. My friend who has been racing for over 10 years says I should adjust my valves on the loose side, I say to the tight side. What do you think? Thanks, Kevin

[davegsxrold929r]

i would set the valves to the book ., and definatley not tight ., you will get blow by the valves and burn them out ., and loose is something done with performance cars., not really for bikes...

[Super_KC124]

What I mean by tight is at the minimum listed measurment. IE:GSXR600 intakes; .004 to .008. I set them at .004.

[Mongrel]

set them closer to .008.  Shim under bucket will tighten up with time.  So yes your friend is right loose side but with in spec is better.

[Super_KC124]

My thinking on this is the closer the clearance, the bigger the cam. I realize I'll have to keep a closer watch on the top end running them this way. I just figure it'll make more power. ???

[mj]

your thinking is correct....a tighter clearance will give you more valve opening and more high rpm power....
looser clearance will tend to give you faster air flow and more low rpm torque.

if you will actually notice any difference though is debateable

[chris_chops]

My thinking on this is the closer the clearance, the bigger the cam. I realize I'll have to keep a closer watch on the top end running them this way. I just figure it'll make more power. ???

What up Kev,
  As long as you are keeping that close watch, I'd say you are right on.  Tighter is more precise and there is less flappin' around to wear things out, as long as your still keeping that close watch! :o :o See ya soon, dude.

Matt

[Super_KC124]

What up Kev,
  As long as you are keeping that close watch, I'd say you are right on.  Tighter is more precise and there is less flappin' around to wear things out, as long as your still keeping that close watch! :o :o See ya soon, dude.

Matt

If you've seen me ride, you know I shift at 6500rpm. ::)

[tcchin]

Typically, valve clearances are set looser for racing, as it's assumed that race engines are run harder and therefore hotter (thus more thermal expansion and less hot valve clearance) than street engines. For example, HRC issues official racing power-up manuals for 600's and 900's that include revised valve clearance specifications that are a lot looser than what the Honda factory service manual recommends.

[Super_KC124]

What about the tire question? Anyone? :'(

[GAMEDIC]

Well about the vaule question unles you are using 100% of the power the 600 has right now as a AM i would not mess with them. i mean someone once said if you are only using 95HP on a bike that has 100HP why try and get it to 110HP. Not that you are not fast...just something to think about. As for the dunlop question that will all depend on what kind of condition them have been in.

[motard11]

 Didn't they stop makinng 207's when they went to 208's? I lost confidence in them or maybe I got a bad set of 208's. Either way I went to michelin's and have been quite pleased not to mention my new tire guy Walt Shafer has been awesome  to me .All his knowledge  and support made the switch logical     (it works for me) Walt's # is(256) 538-5906. Hope this helps. Motard11 ;)