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Good Housekeeping. A friend purchased a lovely 2015 EX500 Kawasaki motorcycle this past winter. It started and he reported that it ran ok on a very cold ride around the block.
Since the spring the performance has weakened, sluggish and unwilling to take much throttle without hesitation. The idle was turned up to avoid stalling at intersections, a tank of fuel mixed with Sea Foam was used to no effect. Mechanic-in-a-can seldom works well for me.
On Thursday he barely managed to ride to my house. Onto the bike lift and the exploration begins.
I figured a spark plug and air filter inspection would be a good start, plus a sample of fuel siphoned out to check for water contamination. The fuel was clean but the spark plugs indicated a fuel-rich mixture. Off with more body parts to access the air chamber and filter.
The air is sucked in through a hidden snorkel that feeds into the air chamber, then it is drawn through the filter to the carburettors. It's a perfect winter home for mice. The first evidence of rodent attack was chewed foam on the air filter.
Removing the end of the airbox was a shock. The critter had been very industrious.
I have seen this happen with other motorcycles but nothing to this extent.
Missing the string mop in the garage? Also contained newspaper clippings (a literate mouse), leaves, insulation and other items that I didn't recognize.
Cleaned out the airbox and inlet to carbs very carefully, installed a new K&N filter (on sale same price as the stock item) and a fresh set of sparkplugs. Got it all done in one day including a 100 km roundtrip to pick up parts. Started the bike up and it immediately sounded better. Checked for leaks and made sure all fasteners were secure, then called it a success.
Yesterday we did a long test ride. At the first stop, my friend pulled up beside me, lifted his visor and displayed a grin the might have split his face in two. He was in motorcycle heaven. We lowered the idle and I suggested that he wind it up to redline in a few gears. Suggestion accepted and he wound it out to full song.
A successful repair.
I told him later that he got off lightly- I once had a motorcycle attacked by mice over the winter. The airbox was filled but not with the items listed above. No, it was a discerning mouse that year- he chewed through the vinyl seat cover to get some nice comfy foam for that nest. Comfort is important.
Since the spring the performance has weakened, sluggish and unwilling to take much throttle without hesitation. The idle was turned up to avoid stalling at intersections, a tank of fuel mixed with Sea Foam was used to no effect. Mechanic-in-a-can seldom works well for me.
On Thursday he barely managed to ride to my house. Onto the bike lift and the exploration begins.
I figured a spark plug and air filter inspection would be a good start, plus a sample of fuel siphoned out to check for water contamination. The fuel was clean but the spark plugs indicated a fuel-rich mixture. Off with more body parts to access the air chamber and filter.
The air is sucked in through a hidden snorkel that feeds into the air chamber, then it is drawn through the filter to the carburettors. It's a perfect winter home for mice. The first evidence of rodent attack was chewed foam on the air filter.
Removing the end of the airbox was a shock. The critter had been very industrious.
I have seen this happen with other motorcycles but nothing to this extent.
Missing the string mop in the garage? Also contained newspaper clippings (a literate mouse), leaves, insulation and other items that I didn't recognize.
Cleaned out the airbox and inlet to carbs very carefully, installed a new K&N filter (on sale same price as the stock item) and a fresh set of sparkplugs. Got it all done in one day including a 100 km roundtrip to pick up parts. Started the bike up and it immediately sounded better. Checked for leaks and made sure all fasteners were secure, then called it a success.
Yesterday we did a long test ride. At the first stop, my friend pulled up beside me, lifted his visor and displayed a grin the might have split his face in two. He was in motorcycle heaven. We lowered the idle and I suggested that he wind it up to redline in a few gears. Suggestion accepted and he wound it out to full song.
A successful repair.
I told him later that he got off lightly- I once had a motorcycle attacked by mice over the winter. The airbox was filled but not with the items listed above. No, it was a discerning mouse that year- he chewed through the vinyl seat cover to get some nice comfy foam for that nest. Comfort is important.