As small-bore motors seem particularly prone to burning valves, it is highly recommended to replace the exhaust valves when you do a valve job! The collett groove put up 14 thou. from the valve tip. Use 12G1015 spring.
As small-bore motors seem particularly prone to burning valves, it is highly recommended to replace the exhaust valves when you do a valve job! The collett groove put up 14 thou. from the valve tip. Use 12G1015 spring.
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