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You were right. You would not think it would be the donuts again in only 1000 miles. Turns out the flanges were thin and could have been cracked a little when the new donuts were put in the first time and the dealer did not catch it. Now it should be good for many miles. Love my Apex...

Mechanic a dealership listened to Apex for 10 seconds. Said you have an exhaust problem. Next day he pulled out exhaust and discovered a big blown out flange section of a y pipe. Flanges on other Y pipe were cracked. The backfiring is due to air being sucked into exhaust thru hole at broken...

Spark plugs changed 1000 miles ago. Will have mechanic check spark plugs and wires and I will check out putting balls in exhaust to see if engine shuts down.

New spark plugs installed 1000 mile ago. I will have spark plug wires and plugs checked before tearing into engine.

Tried sea foam. Did not help. I will have dealer adjust valves on Wednesday. Mechanic is pretty sharp, has worked on Yamaha's for 15 years. I will post the results of valve adjustment Wednesday evening.

Called dealer. Probably has sticking valve and valves out of adjustment. I will have valve train adjusted before I blow out muffler.

Called dealer. Probably has sticking valve and valves out of adjustment. I will have valve train adjusted before I blow out muffler.

Donuts replaced 1000 miles ago.

8,000 miles on Apex. Idle is rough, seems like to much fuel, runs great off idle, but when going over 60 mph Apex will backfire when you let off the throttle and idle down towards 15 mph it will let out loud backfire. I am afraid my muffler will blow out. Seems like unburned fuel is building...

Good idea. I will do that when I install the new solenoid when it arrives in three days. There was a lot of corrosion on the connector plug to the solenoid which made it hard to separate from the defective solenoid.

Starter Solenoid would not work when cold like below 0 F Took air box off solenoid clicked when turning key, but not turning over starter, check voltage from battery ground side to hot wire on starter, nothing when key turned on, nothing there. Put hair dryer on starter solenoid for a minute...

2006 Apex, fuel pump comes on, new battery this year, just a small click sound, yellow light comes on, does not turn over, 5 below, happened a week ago, Apex was in garage heated garage to investigate, Apex warm turned on key turned over normal and started. Seems it does not like the cold...