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Have 2 new 22’ XCR 650s. One fouled its first spark plug at around 500 miles, changed. Last night it fouled the 2nd spark plug. Different cylinder. My other XCR, blew its first plug last week at 470 miles, and now at 735, last night also blew a plug, but this time the same one. Both have been through the break in period, always allowed to warm up well beyond when the low temp warning goes off. Have owned multiple 600 clean fire engines and never changed the plugs out of necessity like this. Side note, both sleds randomly pop a engine light for a P1346, randomly, code states Chassis Supply Voltage supply low. Have to go into the 7S diagnostic screen to pull code as it is not present all of the time. Replaced the plugs with NGK BPR9ES, read on a previous post about switching to BPR9E1X? Will post picture of plugs.
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Been using premium 91/93 along with that setting: my dealer told me to try using 87- and running it on the non ethanol mode still. The tank says Min 87, manual says 91