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Old Aug 13, 2012 | 05:29 PM
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Originally Posted by squidly_c
Im running 87 octane (factory recommended) gas in it, with no ethanol, also Ive noticed it really only does it after the engine is hot and has been running for awhile.
Are you sure that's right?

It's pretty strange that the factory would recommend low octane gas for these hot-running motors. Maybe it's the MOCO's version of denial that their stock engines run hot?? Who knows?

Anyway, running the highest octane gas that's available in your area should help a lot. Maybe even prevent blowing a hole through one of the pistons till you get it tuned.

Good luck
 
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Old Aug 13, 2012 | 05:32 PM
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Originally Posted by squidly_c
Im running 87 octane (factory recommended) gas in it, with no ethanol, also Ive noticed it really only does it after the engine is hot and has been running for awhile.
Dealership should have told you to run higher octane, look in your service manual, bet it states to run 91 or better? All newer bikes require higher octane.
 
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Old Aug 13, 2012 | 07:32 PM
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Both of my Harleys require at a minimum 91 octane, and the factory recommends nothing more than a 10% blend of ethanol in the fuel. Yea, you might want to check your owners manual.
 
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Old Aug 13, 2012 | 07:54 PM
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Originally Posted by squidly_c
Im running 87 octane (factory recommended) gas in it, with no ethanol, also Ive noticed it really only does it after the engine is hot and has been running for awhile.
Are you saying your owners manual reccomends 87 octane?
 
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Old Aug 13, 2012 | 09:07 PM
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Better read your owners manual: 91 octane, here.

And quit lugging your motor.
 
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Old Aug 13, 2012 | 09:23 PM
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Try downshifting.
 
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Old Aug 14, 2012 | 01:17 AM
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Originally Posted by OldMike
Are you saying your owners manual reccomends 87 octane?
That's what the OP is saying, that's NOT what his manual says. 91
 
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Old Aug 14, 2012 | 01:26 AM
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A lot of these guys have never bothered to even read the owners manual. Instead they destroy their engines by allowing it to detonate, not realizing they can burn a hole right through the piston!
 
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Old Aug 14, 2012 | 02:59 AM
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I did read the owners manual and coulda sworn it said 87, but you guys are right, so Ill be using 91 from now on.
 
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Old Aug 14, 2012 | 03:02 AM
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And coming off of sportbikes and a V-rod, I dont lugg the motor, if anything I hit the damned rev limiter to damn often.
 
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