At 270 hours my GP1200 detonated due to creased fuel pump check valves.
Put on a new SBT top end and rebuilt the carbs including new throttle shafts.
Ran like a champ for 30 hours. Yesterday anything over half throttle and the
RPM's would drop. Took carbs apart and the check valves are creased again What going on here?
Put on a new SBT top end and rebuilt the carbs including new throttle shafts.
Ran like a champ for 30 hours. Yesterday anything over half throttle and the
RPM's would drop. Took carbs apart and the check valves are creased again What going on here?
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