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Vintage Bikes Thread, valve train in Help / Advice, How-To's & Performance; Look into a technique called notching. People apparently cut a slit in valves and it ...
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08-10-2008, 06:19 PM
| #21 (permalink) |
| Administrator  | Look into a technique called notching. People apparently cut a slit in valves and it does magical wonders. You can make ports bigger but usually cams are then required to supply the new flow required.
__________________  --'03 CRF450r-- --FMF Pipe, Pro-Tech Revavle-- --Vortex Basket With Tusk Disks And HP Springs-- --Pro Taper Triple Clamps And Bars-- --Devol Full SP With Moose HGs-- --Renthal 13/50 With R1 Chain-- --Now It Is The End, Probably...-- --'06 CBR F4I-- --Bone Stock-- |
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08-10-2008, 07:20 PM
| #22 (permalink) |
| Pro Mototips Member  | i can't find anything on it... does it have another name?
__________________ If it does not move at first, get a bigger hammer!!  MyspaceYamaha 1982 xj550 under bike lights Kawasaki klx250 1979 custom fiberglass silencer+ Honda xr200r 1985 stock = Dakaw Dk250 2008 |
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08-11-2008, 12:56 AM
| #23 (permalink) |
| Administrator | Um... could but I don't know it. I will look into it a bit more and see what I can find out.
__________________ --'03 CRF450r-- --FMF Pipe, Pro-Tech Revavle-- --Vortex Basket With Tusk Disks And HP Springs-- --Pro Taper Triple Clamps And Bars-- --Devol Full SP With Moose HGs-- --Renthal 13/50 With R1 Chain-- --Now It Is The End, Probably...-- --'06 CBR F4I-- --Bone Stock-- |
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08-11-2008, 04:33 AM
| #24 (permalink) |
| Pro Mototips Member | kk but cutting slits in the valve does not sound good really... sounds like a weak point to me
__________________ If it does not move at first, get a bigger hammer!! MyspaceYamaha 1982 xj550 under bike lights Kawasaki klx250 1979 custom fiberglass silencer+ Honda xr200r 1985 stock = Dakaw Dk250 2008 |
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08-11-2008, 10:15 AM
| #25 (permalink) |
| Administrator | It is not a deep cut. It is a cut on the face of the valve which simply causes fuel/air to mix better cause well... more power and more fuel economy. Obviously not as important as the power but it is still there.
__________________ --'03 CRF450r-- --FMF Pipe, Pro-Tech Revavle-- --Vortex Basket With Tusk Disks And HP Springs-- --Pro Taper Triple Clamps And Bars-- --Devol Full SP With Moose HGs-- --Renthal 13/50 With R1 Chain-- --Now It Is The End, Probably...-- --'06 CBR F4I-- --Bone Stock-- |
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