Valve Clearance
What clearance have you checked and set your valves to? How many miles on bike at time of service?
Factory spec is .04-.06mm. I feel this is way too tight of clearance. Any thoughts from anyone else? |
I am getting ready to check the valve lash on my RX3, but I haven't done it yet. ;) CSC specifies the valve lash as 0.04-0.06 mm for both valves. Initially, I though this valve lash was too small for the exhaust valve. However, I am going to follow these specifications for the first few inspections/adjustments, and if the bike continues to run well, I will stick with them.
However, it is interesting to refer to the AJP PR5 Owner's Manual. The last page of the manual, page 34, lists the following specifications for valve clearance. ;) http://issuu.com/ajpmotos/docs/ajp_pr5_user_manual_en Intake: 0.05 mm Exhaust: 0.08 mm The AJP PR5 employs the same Zongshen NC250 engine, and Delphi EFI as the Zongshen RX3. |
I see member Katflap set his valves to 0.06 which made the engine better especially from cold appearing to have cured cold start stalls, I'll be setting mine to this value once there's a few more miles on the bike.
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I have inspected, and adjusted the valve lash on my RX3. All four valves were tight. I set all of them for a clearance of 0.06 mm. The bike is running great, and I am getting about 70 mpg every time I fill the fuel tank. :)
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6 thou or .06 mm ? 6 thou = .152 mm .002 thou = .06mm Not picking on you AZ but just saw Spud did his at .06mm and yours is 3 times more clearance. ????? I can here your valves clattering clear over here but then noisy valves are happy valves I've been told. :))) rj |
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As an engineer in the states I can't believe I still have to deal with standered units. They should have died 40 years ago!
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It's: SLAPPY valves are happy valves! :lmao: My pushrod 250 called for 0.002" intake and exhaust. I couldn't bring myself to do only 0.002" on the exhaust. I went with 0.003" intake and 0.004" exhaust. |
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