Anyone else actually changing plugs at 7500 miles?

[Ked0607]

I was looking at the 7500 mile service that I am past due for. I have stretched the service intervals a bit due to the fact that I am running MOTUL 300V. I am at 8100 miles total on the bike and its been almost 4k miles since last oil change. I know these bikes are shipped with iridium plugs from Suzuki. Why on earth do they want the plugs changed at 7500 miles? Even with the euro 5 and all the emissions that may or may not be there...... Anyhow 50 for new plugs is cheap insurance I guess.

 

[Sinister#4]

Because they use a very cold plug, heat range 9, they will build up crud far faster than a normal heat range plug. We use 9 or 10 in our all out race car stuff, super cold.

 

[Sandow]

I just replaced my first set of iridium plugs at nearly 50 000 km. The old ones still looked fine. I wouldnt worry about it too much.

 

[mabupa]

I was looking at the 7500 mile service that I am past due for. I have stretched the service intervals a bit due to the fact that I am running MOTUL 300V. I am at 8100 miles total on the bike and its been almost 4k miles since last oil change. I know these bikes are shipped with iridium plugs from Suzuki. Why on earth do they want the plugs changed at 7500 miles? Even with the euro 5 and all the emissions that may or may not be there...... Anyhow 50 for new plugs is cheap insurance I guess.

I went double the recommended interval, but I think @c10 brought up a good point some time ago……. The plugs on your car have a much longer interval, but the motor on it doesn’t rev it to 10k RPM like on a performance machine. As for oil, I tried the longer intervals while running amsoil and, what the lab test showed was that, at 5k miles of use it was too contaminated and they recommended not going past that. I was hoping I was going to be able to move to 10k intervals, since Suzuki made it a pain to change the oil filter, but didn’t go as plan. Now I just use rotella and change it at 3500 miles. No sense in spending money on the fancy oils to dump so soon.

 

[WuzzaCBXRider]

If I remember correctly I’ve changed plugs on my Gen 1 three times since 2006 (bike was built in December of 2005). That’s 81,000+ miles and not with iridium plugs. Running Amsoil almost since new I’ve changed my O&F every 5,000 miles and when I change it I’ve lost about a half cup of oil.

 

[zeepopo2]

I feel the difference as the plug ages but I track mine, even before the change interval I feel the difference in the combustion. I moved up one heat range and it's made a world of difference though. Got no black soot on my muffler anymore. Full combustion. Love it. Running 300v as well. About to send it in for testing to see how's its held up. 3k km and 2 track days. On some engines 300v gets heavy fuel contamination. Don't think anyone ever tested a busa though. I'll find out soon. I did change from 5-40 to 10-40. Apparently the 5-40 degrades to a 20, the 10-40 degrades to a 30. Love the sleek shifts of the 5-40 but not at the expense of 2 grades of breakdown.